I used this app some years ago with my golf r. Tried to be as precise as possible wtih the data i gave to the app. Stock power given by the app was 319. I thought it was wrong, until i had the car on the dyno and it gave 315. Quite impressive. After the 1st remap, the dyno gave 385 and the app 392. Not far... To summarize, I agree with you, this is a very good app, keeping in mind: -you have to be very precise with all the data you give to the app (weight, gear ratios,...). -you have to do it 4-5 times, trying to drive the straightest possible (because the app uses the accelerometer of the phone, which are very very sensible) -of course, do it on a road in the middle of nowhere ;) Thanks again for your vid. Great job.
Given the fact how powerful your car is, those differences in the measurements between the dyno and the app are negligible. There is also good to keep in mind that the lower measured power on the dyno might be caused by a worse cooling of your car - not only less air gets to engine when it's warmer but also an ECU intentionally limits the power of engine when the temperature of intake air, fuel, coolant, engine oil and so on gets over some limit. Or there also can be some power differences on individual gears both because of the power limitation by ECU or alternatively by DSG and different losses in gearbox on individual gears. I myself do SW modifications of ECUs, mostly for increasement of the engine power, both on dyno and on road, so I can say I already have some experience :) English isn't my first language so I hope you could understand it well.
It's definitely not a bad tool for giving you an idea. Definitely worth the money. I wouldn't do any fine tuning with it but on a smooth road and repeated tests, it would certainly be useful to diagnose issues and give you an idea of how much power your car is making after modifications and such.
I recently got the app because of this video. I'm realy impressed by it! The repeatability is straight unbelievable if everything is done correct. I highly recommend it!
Acceleration really is change of speed over time and to accelerate a certain mass at a certain rate, you need a certain power. That’s really it. The phone has an accelerometer, a clock, and a GPS, it has a decent sources of speed and can measure acceleration directly as well as infer it from the GPS speed and the clock. A bit of sensor fusion and you have a linear acceleration that is pretty accurate. After that you need good data about the car: its weight, rolling resistance, and frontal area. All this mixed together gives the power. Knowing the gearing and the speed you get the rpm. From the power and the rpm you get the torque. From the speed, frontal area and rolling resistance you get the losses. All of the above is based on physics, nothing transcendental. Yes, it’s repeatable and it will be as accurate as your data is. If you load your trunk with stones and don’t update the weight, or if you get some wheel slip, it will estimate less power. If you are near a mountain and your GPS is funky, the result will be wrong. But in decent condition, good grip, flat road, no wind, open sky, with good input data about the car and a smooth run, the result will be just as good as any other method.
My sister gave me a 87 it had been sitting in a garage for 7 years and was rough shape.I flew in with a few tools airline employee so no cost there.Brake pads thermostat and on to Tulsa.FUNNEST CAR IN MY LIFE.A guy in a honda s-2000 Wants to go!He passed me at about 90.Thinking my POS wouldn't try he had his mouth open as I came by.I dropped my mouth open as I looked at the speedometer,I was rapidly going through 135. A work buddy said they would only do 127 mph new.I just know what the speedometer said.Normally aspirated with the T-VIS IT it felt like it was ready for more,but my general may-pop tires were way past any speed rating it might have had.Handled great the must fun I ever had in a car with my clothes on I really miss it
I never imagined that something like this would exist. Thank you for the information and for making such a real test and for investing your time and money to do it because it does not seem that you are profiting with that application or yes?
This is a great video. Just to clarify one point, wouldn't be possible to make a dyno app on a phone without knowing the vehicle weight. That's why it asks what vehicle you're driving. Acceleration alone tells you nothing without it.
Cheeers from nearly the neighbours, not sure why i only found this channel now.. subscribed. Peace out, and glad to see Bosnia made hell a lot of progress since.. so, you know.
Since the w-word? It's ok man, you can say it. Let it out! Since WAR!!! (*"what is it good for absolutely nothing" plays in the background). Yeah, we're all about progress and stupidly complicated governance now, but it's cool. Thanks for subbing man, welcome aboard :)
My experience has been very good with perfexpert. I get very consistent results and its right where it should be. All dynos will vary run to run so consistency is the priority. You can track gains with this and nit have to pay for dyno session.
Seems like a talented engineer could come up with an smartphone app that could plug the phone directly to the obd2 port and literally pull real time data logs directly from the ECU while you drive the car and calculate an even more accurate report than an app solely relying on phone sensors. If the Perfexpert app was to get just 5% to 10% more accurate it could theoretically start putting dynos out of business or force them to reduce their cost in order to survive.
The carbs definitely need more cold fresh air. That is a very important point and something I have been thinking about a lot. The position where they are in right now has them getting very little cold air and I think I have a lot to gain by getting them some cold air somehow. I definitely considered the snorkel as it's a ready made solution, but I'm really not sure when it comes to the aerodynamics and actual benefits of that snorkel, as aerodynamics are very complex and air loves ducts that are flush with the car's surface. Something that sticks out may or may not offer benefits. I did have an idea to modify the engine cover, but we'll see. It will probably be a great project for the winter.
@@d4a What about a Supercharged AW11 engine cover or something like a power bulge on drag cars? mine came with one on it and it evacuates quite a bit of heat, and i've read the natural flow of air through the AW11's engine bay is from bottom to top at roughly 3% of the car's speed so maybe rather than trying to get cold air in from the top you could find a solution that evacuates the hot air out allowing cold air to come in from the bottom? just a thought haha
As mentioned in the video, street tuning is extremely difficult to use. Because the is impossible to repeat, the same test conditions run after run. BTW guys, nothing beats this specific dyno.
I don't pay to put a car on the dyno anymore, it's too expensive! Now I'm a fan of PerfExpert! Since the numbers and curves were almost the same in comparison, why pay more?! The perfexpert application can't give numbers because you enter a precise model, because if you make a mistake in the slightest parameter the numbers will be wrong! The most important thing with perfexpert is to have the flattest road possible and to have the most precise weight possible of the vehicle and everything inside, the ideal would be to have it weighed. And also to be sure to have the right gear ratios and axle ratios! The precision of the internal sensors (accelerometer) are hyper precise to draw a curve, then it's a story of algorithms. Today perfexpert is even usable with racelogic racebox...... Otherwise very good video
The issue is with faster cars that tend to spin their tires, otherwise if you plug the weight correctly the app should be accurate since principle/formula they use is identical to the one of the real dyno
This is not correct, as the app requires you to drive normally and once in 2nd gear at 2000 rpm you go up to the maximum rpm. Watch the video on how to use the app.
Well with vehicle weight and horsepower alone you can figure a quarter mile time fairly accurately. With Weight, CD, and Gearing and acceleration figures I'm sure you could get a fairly accurate "dyno" graph.
It was actually perfectly accurate on the first two. I think the third reading is best ignored as something seems to have confused it. It's probably best to always do several runs with this thing and ignore the ones that stand out tol much, the others will likely be very accurate, especially on a smooth straight road.
You could see the power change in the gforce levels after timing change. Went from .25-.26 down to .20. So gforce app alone prob show you changes of 5hp levels
Very interesting. I see your original timing is 42 degrees, that seems rather a lot for a compact combustion chamber. Were these numbers derived by tuning for MBT or some other criteria?
I use a phone app for track days (it’s cheap and at least gives me ballpark lap times). The GPS signal isn’t exactly accurate for determining speed. Granted I don’t look down the second I hit the brakes but it often gives me top speeds 3-5 mph above what I was actually going. Even just a basic mapping software will show you the same error margin as you cruise down the highway. I doubt this is any more accurate than your butt when determining small changes.
Interesting. :) So I rewatched the older video and I have a question. Can you enter the car's parameters manually if your car isn't in the app's database? Because I would gladly pay for the app, it looks like it could be useful to me, but I want to be sure that I can use it before I spend the $9.99. :P
The database is absolutely giant and you must enter something. I have the app installed, if you want you can tell me what car you have and I can check if it's in the database before you buy it.
@@d4a I hate to impose that on you, but yes, actually, that would be very nice of you! :P Mine is a 1999 Nissan Stagea RSFour-S. If it's in the database already, that would make my life a lot simpler. :D
I checked, Stagea is not in the database, but I noticed something I didn't see before, when selecting a model you can actually choose "other" and then the app lets you enter everything manually, just have to find all the data yourself and be sure it's accurate.
@@d4a Thanks for checking, dude! It's cool that they let you enter everything yourself, at least I can use the app. I'm used to not finding my car in most databases, but most apps/websites just go "sorry bud, your car doesn't exist". :D
@@d4a So, I bought the app, entered my car specs, calibrated the sensors (which was a pain) and now I'm all set. I'll probably test the app for real when I can figure out where around here there is a flat piece of road with not too much traffic or speed cameras. :D Thanks again, good sir, for all that precious info!
Nice video dude! I didn't saw many people doing tunning of their cars on the side of the road... :) Now technically speaking; I assume that the software is picking up the RPM from the dash vibration and this is why it is so important that the road to be perfect. But... what if you are going to mount the phone directly on top of the engine on a soft thick pad? It should suppress the effect of the road, but the question is: is this mounting going to suppress also the G forces? Or if (I don't know the software) the software is picking up the RPM by an OBD connection, then you have to suppress all the vibration to the smartphone and so the readings will be more accurate. And you can do this by using a soft material (vibration absorbent) under the phone. The results should be much more precise.
Great video, I’m going to buy the app. However, I’m also interested in downloading a program for my Mac Pro....In the video you change up something in the car and it takes out some horsepower. What software are you using? My boyfriend built a camaro and I want to download a software or program on my Mac so he can do it himself and tweak it. Help!
is 4age low at those torque? or jus the gearbox is messing around? cuz my previous car which is 1.5(3szve) puts about 102/107hp and makes around 14/15kg torque... but the 4a....hmmm......
Wait, am I getting this right? First you had to keep calibrating it until you finally matched the numbers that you got on the real dyno? Doesn't that defeat the purpose? What if you have never taken the car to an actual dyno? And secondly your second set of runs after the timing pull varied between dyno numbers and actual lower numbers? How on earth can you use this as a tuning tool? Where is the consistency? You're better off using something like virtual dyno that generates charts based on actual ECU logs. They seem to be far more accurate than this app.
Calibration has nothing to do with dyno numbers. You simply put the phone in different positions to calibrate the g sensors. As I said in the video, if you're interested in how the app actually works and gets set up it's best to watch my video on that. This was just a comparison with a real dyno. The app is actually extremely consistent, it just has a sort of failed run from to time because I was testing on a bumpy road. I explained this in the video as well. If you simply do more runs or find a snooth road the app works extremely well.
Can you advice how to measure engine which has automatic 8speed (ZF8) gearbox and AWD? What should be the gear/rpm for start if max torque which is received by my car (Alfa Romeo Giulia 280HP Q4) on dyno curves is achieved around 3200rpm? when I tried to make dyno test with perfexpert app then it suggested to use max 4th gear with 3000rpm and 66km/h as start, but I'm receiving low results...
It probably infers/calculates it from the gearing info it asks for during the setup process, and by assuming you're running the correct size wheels and the tires are pressurized to spec, etc... Same as a dyno, actually, except it uses your phone's sensors instead, of... well, a dyno.
@@mrsabidji Not same at all. Phone mesaures accleration of the car and factors out the power needed in corelation with the gps speed, while the dyno goes for torque on the drum and angular velocity of the drum. Power=linear velocity x force and also Power=angluar velocity x torque. Very different aproach.
@@mrsabidji Thansk for the answer. I've put an indepth comment about power measurements in general here ua-cam.com/video/Lx5238pqJak/v-deo.html&lc=UgzdtkT3FOBgYgYp8AN4AaABAg
Dude how’s your butt dyno? It probably feels 200hp.. I’m an old subscriber and I just got out of a long 6 month military course.. so no phones.. I’m gunna recap on your videos now.. anyways I hope you’re doing well, Thanks!
So i was thinking that the app probably asks for your car's make/model so it can run an algorithm that calculates hp/torque based on how long it takes a certain weight (ie about 3000 lbs in our case - sorry, i am indeed american lol) to get to a certain speed, but what if you take a bunch of weight off the car? Can you enter it manually? I'll probably get it anyway because i just made a custom exhaust out of a sportbike muffler and i already had TRD headers on it when i got my AW11 and i'm curious where it's at but not curious enough to take it to a dyno yet lol
The app does let you enter everything manually both when creating your cars profile and later when before a run when you're telling it how much fuel and passengers are in the car and how heavy they are :)
Good eye. I was driving the engine hard and would then come to a sudden stop. As you can imagine this leads to a lot of very hot air accumulating under the cover, which of course isn't good. So I lift the cover before the next run to let the engine cool.
@@d4a Ahhh I figured it was either that or you put the jump wire in the diagnostic port because ive heard of people doing it on the Dyno when they run the megasquirt ECU haha like I said I was just curious which it was
I Cringed when you stuck your phone to the dash. Armor-all should get rid of the adhesive, Wd-40 if you need something stronger. (If you can get those in your country)
I can get both but if you check out the end of the video I kinda managed to roll it off with my fingers, I just overdramatized a bit for entertainment purposes. I used some very weak double sided tape that I tested before on car dashes and it doesn't leave any residue and won't damage the dash (it's abro blue double sided tape btw) just don't stick it on too hard or leave on longer than an hour or two.
Well a dyno is not really for seeing hp it is for tuning your car after you do enough of mods so that you can release hp the app is kind of cool but still useless.
I used this app some years ago with my golf r. Tried to be as precise as possible wtih the data i gave to the app. Stock power given by the app was 319. I thought it was wrong, until i had the car on the dyno and it gave 315. Quite impressive. After the 1st remap, the dyno gave 385 and the app 392. Not far...
To summarize, I agree with you, this is a very good app, keeping in mind:
-you have to be very precise with all the data you give to the app (weight, gear ratios,...).
-you have to do it 4-5 times, trying to drive the straightest possible (because the app uses the accelerometer of the phone, which are very very sensible)
-of course, do it on a road in the middle of nowhere ;)
Thanks again for your vid. Great job.
Given the fact how powerful your car is, those differences in the measurements between the dyno and the app are negligible. There is also good to keep in mind that the lower measured power on the dyno might be caused by a worse cooling of your car - not only less air gets to engine when it's warmer but also an ECU intentionally limits the power of engine when the temperature of intake air, fuel, coolant, engine oil and so on gets over some limit. Or there also can be some power differences on individual gears both because of the power limitation by ECU or alternatively by DSG and different losses in gearbox on individual gears. I myself do SW modifications of ECUs, mostly for increasement of the engine power, both on dyno and on road, so I can say I already have some experience :) English isn't my first language so I hope you could understand it well.
It's definitely not a bad tool for giving you an idea. Definitely worth the money.
I wouldn't do any fine tuning with it but on a smooth road and repeated tests, it would certainly be useful to diagnose issues and give you an idea of how much power your car is making after modifications and such.
I recently got the app because of this video. I'm realy impressed by it! The repeatability is straight unbelievable if everything is done correct. I highly recommend it!
Acceleration really is change of speed over time and to accelerate a certain mass at a certain rate, you need a certain power. That’s really it. The phone has an accelerometer, a clock, and a GPS, it has a decent sources of speed and can measure acceleration directly as well as infer it from the GPS speed and the clock. A bit of sensor fusion and you have a linear acceleration that is pretty accurate. After that you need good data about the car: its weight, rolling resistance, and frontal area. All this mixed together gives the power. Knowing the gearing and the speed you get the rpm. From the power and the rpm you get the torque. From the speed, frontal area and rolling resistance you get the losses. All of the above is based on physics, nothing transcendental. Yes, it’s repeatable and it will be as accurate as your data is. If you load your trunk with stones and don’t update the weight, or if you get some wheel slip, it will estimate less power. If you are near a mountain and your GPS is funky, the result will be wrong. But in decent condition, good grip, flat road, no wind, open sky, with good input data about the car and a smooth run, the result will be just as good as any other method.
racja :)
My sister gave me a 87 it had been sitting in a garage for 7 years and was rough shape.I flew in with a few tools airline employee so no cost there.Brake pads thermostat and on to Tulsa.FUNNEST CAR IN MY LIFE.A guy in a honda s-2000 Wants to go!He passed me at about 90.Thinking my POS wouldn't try he had his mouth open as I came by.I dropped my mouth open as I looked at the speedometer,I was rapidly going through 135. A work buddy said they would only do 127 mph new.I just know what the speedometer said.Normally aspirated with the T-VIS IT it felt like it was ready for more,but my general may-pop tires were way past any speed rating it might have had.Handled great the must fun I ever had in a car with my clothes on I really miss it
Loved that” NA gains are sad “ caption 🤣🤣🤣hilarious
Nice car, that was my first car when I was a kid in the early 90’s. Ended up with a 20v swap. Now I drive a 4C which reminds me of the old aw11.
I never imagined that something like this would exist. Thank you for the information and for making such a real test and for investing your time and money to do it because it does not seem that you are profiting with that application or yes?
Nope I have nothing to with app, zero money from it for me :)
Thank you so much. I never imagined such an app could be worth using.
Your torque figures are awesome... My eunos is making 109hp and 134nm...
134 is nice, the NA is lighter than the aw11 and a glorious car anyway you look at it.
Wow, those results are seriously impressive. Essentially dead on if you throw out some outliers. Torque not so much, but horsepower really good.
@@FixingWithFriends Agreed. It certainly won't be perfect. Surprisingly close though!
This is a great video. Just to clarify one point, wouldn't be possible to make a dyno app on a phone without knowing the vehicle weight. That's why it asks what vehicle you're driving. Acceleration alone tells you nothing without it.
Came for the dyno app review. Staying and subscribing for the AW11 MR2 :-)
Cheeers from nearly the neighbours, not sure why i only found this channel now.. subscribed.
Peace out, and glad to see Bosnia made hell a lot of progress since.. so, you know.
Since the w-word? It's ok man, you can say it. Let it out! Since WAR!!! (*"what is it good for absolutely nothing" plays in the background). Yeah, we're all about progress and stupidly complicated governance now, but it's cool. Thanks for subbing man, welcome aboard :)
This shit sadly was way worse than a simple war.. been there on holiday a few weeks ago, and will definately revisit!
Keep up the good work mate!
App can never be as good as a dyno but a whole lot better than a butt dyno
My experience has been very good with perfexpert. I get very consistent results and its right where it should be. All dynos will vary run to run so consistency is the priority. You can track gains with this and nit have to pay for dyno session.
A car drives by and honks .... lmao
I was searching for a dyno nearby, all costs around 120€+, then i saw this! Its 22:30, but i will try now! :)
Perfexpert app looks legit.
Seems like a talented engineer could come up with an smartphone app that could plug the phone directly to the obd2 port and literally pull real time data logs directly from the ECU while you drive the car and calculate an even more accurate report than an app solely relying on phone sensors. If the Perfexpert app was to get just 5% to 10% more accurate it could theoretically start putting dynos out of business or force them to reduce their cost in order to survive.
I love watching your videos!!! One suggestion, Have you consider giving more air to the carbs? like an MR2 93 snorkel?
The carbs definitely need more cold fresh air. That is a very important point and something I have been thinking about a lot. The position where they are in right now has them getting very little cold air and I think I have a lot to gain by getting them some cold air somehow. I definitely considered the snorkel as it's a ready made solution, but I'm really not sure when it comes to the aerodynamics and actual benefits of that snorkel, as aerodynamics are very complex and air loves ducts that are flush with the car's surface. Something that sticks out may or may not offer benefits. I did have an idea to modify the engine cover, but we'll see. It will probably be a great project for the winter.
@@d4a What about a Supercharged AW11 engine cover or something like a power bulge on drag cars? mine came with one on it and it evacuates quite a bit of heat, and i've read the natural flow of air through the AW11's engine bay is from bottom to top at roughly 3% of the car's speed so maybe rather than trying to get cold air in from the top you could find a solution that evacuates the hot air out allowing cold air to come in from the bottom? just a thought haha
N/A for life!
That's kinda cool
Nice video. Don't forget to revert to your original ignition table :)
Hahaha I forgot actually :)
great video and App!
As mentioned in the video, street tuning is extremely difficult to use.
Because the is impossible to repeat, the same test conditions run after run.
BTW guys, nothing beats this specific dyno.
Henning Larsen I’m sorry, I didn’t understand that.
Can you repeat the above in Hands?
I don't pay to put a car on the dyno anymore, it's too expensive! Now I'm a fan of PerfExpert! Since the numbers and curves were almost the same in comparison, why pay more?! The perfexpert application can't give numbers because you enter a precise model, because if you make a mistake in the slightest parameter the numbers will be wrong! The most important thing with perfexpert is to have the flattest road possible and to have the most precise weight possible of the vehicle and everything inside, the ideal would be to have it weighed. And also to be sure to have the right gear ratios and axle ratios! The precision of the internal sensors (accelerometer) are hyper precise to draw a curve, then it's a story of algorithms. Today perfexpert is even usable with racelogic racebox......
Otherwise very good video
The issue is with faster cars that tend to spin their tires, otherwise if you plug the weight correctly the app should be accurate since principle/formula they use is identical to the one of the real dyno
This is not correct, as the app requires you to drive normally and once in 2nd gear at 2000 rpm you go up to the maximum rpm. Watch the video on how to use the app.
Well with vehicle weight and horsepower alone you can figure a quarter mile time fairly accurately.
With Weight, CD, and Gearing and acceleration figures I'm sure you could get a fairly accurate "dyno" graph.
so +- 10 inaccuracy? pretty amazing for $10
It was actually perfectly accurate on the first two. I think the third reading is best ignored as something seems to have confused it. It's probably best to always do several runs with this thing and ignore the ones that stand out tol much, the others will likely be very accurate, especially on a smooth straight road.
does wheelspin affect the reading?
You don't do wheelspin. Watch my how to video and all shall be clear
You could see the power change in the gforce levels after timing change. Went from .25-.26 down to .20. So gforce app alone prob show you changes of 5hp levels
That last part... LOL!!!!
This would have to work off G's for hp and torque. Looks like a good bit of kit
Very interesting. I see your original timing is 42 degrees, that seems rather a lot for a compact combustion chamber. Were these numbers derived by tuning for MBT or some other criteria?
I use a phone app for track days (it’s cheap and at least gives me ballpark lap times). The GPS signal isn’t exactly accurate for determining speed. Granted I don’t look down the second I hit the brakes but it often gives me top speeds 3-5 mph above what I was actually going. Even just a basic mapping software will show you the same error margin as you cruise down the highway. I doubt this is any more accurate than your butt when determining small changes.
try track addict its quite good also.
Interesting. :)
So I rewatched the older video and I have a question. Can you enter the car's parameters manually if your car isn't in the app's database? Because I would gladly pay for the app, it looks like it could be useful to me, but I want to be sure that I can use it before I spend the $9.99. :P
The database is absolutely giant and you must enter something. I have the app installed, if you want you can tell me what car you have and I can check if it's in the database before you buy it.
@@d4a I hate to impose that on you, but yes, actually, that would be very nice of you! :P Mine is a 1999 Nissan Stagea RSFour-S. If it's in the database already, that would make my life a lot simpler. :D
I checked, Stagea is not in the database, but I noticed something I didn't see before, when selecting a model you can actually choose "other" and then the app lets you enter everything manually, just have to find all the data yourself and be sure it's accurate.
@@d4a Thanks for checking, dude! It's cool that they let you enter everything yourself, at least I can use the app. I'm used to not finding my car in most databases, but most apps/websites just go "sorry bud, your car doesn't exist". :D
@@d4a So, I bought the app, entered my car specs, calibrated the sensors (which was a pain) and now I'm all set. I'll probably test the app for real when I can figure out where around here there is a flat piece of road with not too much traffic or speed cameras. :D
Thanks again, good sir, for all that precious info!
wow thanks sir its verry to be ok
Nice video dude! I didn't saw many people doing tunning of their cars on the side of the road... :) Now technically speaking; I assume that the software is picking up the RPM from the dash vibration and this is why it is so important that the road to be perfect. But... what if you are going to mount the phone directly on top of the engine on a soft thick pad? It should suppress the effect of the road, but the question is: is this mounting going to suppress also the G forces? Or if (I don't know the software) the software is picking up the RPM by an OBD connection, then you have to suppress all the vibration to the smartphone and so the readings will be more accurate. And you can do this by using a soft material (vibration absorbent) under the phone. The results should be much more precise.
Phone App + custom PnP ECU + Laptop = I CAN TUNE ON THE OCEAN SURFACE! (or at home)
I was going to buy the app to test my dirt car race car, but the results would be all over the chart because of the bumps on the track.
👍
Well this probably won’t work here in Australia then. All our roads are shite and full of potholes and undulations. 😂
Eu uso o Torque pro Realtime Charts for Torque Pro & OBD2. Faz a medição por sua ECU.
Is it accurate?
In which gear did you do the test on the real dyno?
Third
There are more advanced dyno apps for passenger seat laptops, could you test one of them?
Great video, I’m going to buy the app. However, I’m also interested in downloading a program for my Mac Pro....In the video you change up something in the car and it takes out some horsepower. What software are you using? My boyfriend built a camaro and I want to download a software or program on my Mac so he can do it himself and tweak it. Help!
What if ur spinning the whole time on the street does it calculate that?
Nope
Is any interface required to use the application?
where did u found ur gearbox data/spec?
Dear sir How to make steps tuning
is 4age low at those torque? or jus the gearbox is messing around? cuz my previous car which is 1.5(3szve) puts about 102/107hp and makes around 14/15kg torque... but the 4a....hmmm......
Do you know if they have the Ford probe gt on the app
What short throw shifter are you using
None. Stock shifter :)
You should check error and compare it with the 2 percent they claim.
Wait, am I getting this right? First you had to keep calibrating it until you finally matched the numbers that you got on the real dyno? Doesn't that defeat the purpose? What if you have never taken the car to an actual dyno?
And secondly your second set of runs after the timing pull varied between dyno numbers and actual lower numbers? How on earth can you use this as a tuning tool? Where is the consistency?
You're better off using something like virtual dyno that generates charts based on actual ECU logs. They seem to be far more accurate than this app.
Calibration has nothing to do with dyno numbers. You simply put the phone in different positions to calibrate the g sensors. As I said in the video, if you're interested in how the app actually works and gets set up it's best to watch my video on that. This was just a comparison with a real dyno. The app is actually extremely consistent, it just has a sort of failed run from to time because I was testing on a bumpy road. I explained this in the video as well. If you simply do more runs or find a snooth road the app works extremely well.
There’s no dyno places in my city so I’m shit outta luck lol
I was only watching to see you build the 4a fe. Really sucks you went away from it.
Went away? Huh?
Can you advice how to measure engine which has automatic 8speed (ZF8) gearbox and AWD? What should be the gear/rpm for start if max torque which is received by my car (Alfa Romeo Giulia 280HP Q4) on dyno curves is achieved around 3200rpm? when I tried to make dyno test with perfexpert app then it suggested to use max 4th gear with 3000rpm and 66km/h as start, but I'm receiving low results...
How does it match your crank hp when its calculations should give you the whp?
It gives both
It probably infers/calculates it from the gearing info it asks for during the setup process, and by assuming you're running the correct size wheels and the tires are pressurized to spec, etc...
Same as a dyno, actually, except it uses your phone's sensors instead, of... well, a dyno.
@@mrsabidji Not same at all. Phone mesaures accleration of the car and factors out the power needed in corelation with the gps speed, while the dyno goes for torque on the drum and angular velocity of the drum. Power=linear velocity x force and also Power=angluar velocity x torque. Very different aproach.
@@AsiAzzy you are absolutely right. Thankfully, I've learnt a lot about dynos, since I've made that over simplified remark. :P
@@mrsabidji Thansk for the answer. I've put an indepth comment about power measurements in general here ua-cam.com/video/Lx5238pqJak/v-deo.html&lc=UgzdtkT3FOBgYgYp8AN4AaABAg
Dude how’s your butt dyno? It probably feels 200hp.. I’m an old subscriber and I just got out of a long 6 month military course.. so no phones.. I’m gunna recap on your videos now.. anyways I hope you’re doing well, Thanks!
Thanks much for doing what you do!
Doing well thanks for asking. Hope you're well after that course too. Butt dyno is good, needs some squats to be in shape, but ok otherwise :)
Thank you for serving. That being said, you are in for one helluva good ride!!! Cheers!
Oh nice, how's that mass amount of forced MKultra trauma based mind control workin' out for ya boot licker?
@@herbienbrian2 it's obvious you "liked" your own comment... Fucking pathetic!!!
So i was thinking that the app probably asks for your car's make/model so it can run an algorithm that calculates hp/torque based on how long it takes a certain weight (ie about 3000 lbs in our case - sorry, i am indeed american lol) to get to a certain speed, but what if you take a bunch of weight off the car? Can you enter it manually? I'll probably get it anyway because i just made a custom exhaust out of a sportbike muffler and i already had TRD headers on it when i got my AW11 and i'm curious where it's at but not curious enough to take it to a dyno yet lol
The app does let you enter everything manually both when creating your cars profile and later when before a run when you're telling it how much fuel and passengers are in the car and how heavy they are :)
driving 4 answers dude that’s so sick, definitely buying it then
@@d4a Also, why'd you have your engine cover up whenever you were showing how you were mounting your phone to the dash? i'm just curious lol
Good eye. I was driving the engine hard and would then come to a sudden stop. As you can imagine this leads to a lot of very hot air accumulating under the cover, which of course isn't good. So I lift the cover before the next run to let the engine cool.
@@d4a Ahhh I figured it was either that or you put the jump wire in the diagnostic port because ive heard of people doing it on the Dyno when they run the megasquirt ECU haha like I said I was just curious which it was
Can you just put a bottle on it?
Jel lagiš il je istinA
It's simple physics.
I Cringed when you stuck your phone to the dash.
Armor-all should get rid of the adhesive,
Wd-40 if you need something stronger.
(If you can get those in your country)
I can get both but if you check out the end of the video I kinda managed to roll it off with my fingers, I just overdramatized a bit for entertainment purposes. I used some very weak double sided tape that I tested before on car dashes and it doesn't leave any residue and won't damage the dash (it's abro blue double sided tape btw) just don't stick it on too hard or leave on longer than an hour or two.
wat gear was ur dyno
4th I think
@@d4a ok cause i using gears2 on the apps is not accurate😅
@@d4a can i know your setting on gear4 rpm
This is rear wheel HP? or Engine HP? that is measured..
Crank hp
@@d4a thanks!
It’s $14 dollars in Canada. That’s sad.
Canadian dollars?
Yes.
That's the equivalent of 9.9 USD, so it's ok. 1CAD = 0.75USD
What if ur car is an auto.
Seems like way to much time,money,and work for a 16hp gain
i say its more than 16hp. id say like 20-25 hp.
App was wrong, hp and torque crosses always at 5252rpm.
I was thinking the same thing. Something is off there, and for this reason alone I wouldn't trust the numbers
BHP and LB/FT Cross at 5252RPM but the graph shows BHP and NM which will not cross at 5252RPM simply because NM is not LB/FT.
@@ICanThrive cool, thanks for explaining.
PervExpert
*GIGGITY*
🤪🤪🤪
🤣
Well a dyno is not really for seeing hp it is for tuning your car after you do enough of mods so that you can release hp the app is kind of cool but still useless.
trust me, you got way more than 16 hp from all those mods.
132 CRANK hp Jesus Christ that is weak