NA Power on a Budget - Miata VVT Swap
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- Опубліковано 11 вер 2024
- Today we review the VVT Engine Swap that we did in Dylan's Miata build. What started as a winter project easily carried on into the summer months, but we've finally gotten it to a point where we can call this phase of his Miata complete. Is there another Engine Swap in his future? Or will we "force" him down another darker path?
Starting Number (1.8 non-VVT running on a 1.6 ECU)
102whp, 100ft/lbs
First trip to the dyno with the VVT.
140whp, 130ft/lbs (E85)
135whp, 125ft/lbs(93 octane)
Second trip to the dyno with Skunk 2 TB, intake manifold, and intake routing
150whp, 128ft/lbs(93 octane)
2020 Build Components:
Engine Specifics:
2002 VVT 1.8l
0.040" Head Shave
11.5:1 Compression
Ported Head
Skunk 2 Intake Manifold
Skunk 2 Throttle Body
Bumper Air Intake
Raceland Header
2.5" Custom Stainless Exhaust
1000CC Injectors
Other:
MS3PNP Pro ECU
Innovate LC-2 Wideband
GM Flex Fuel Sensor
Depowered Steering Rack
Konig Hypergram 15 x 7.5 Wheels
Yokohoma Advan AO52 Tires (205/45/15)
Racing Beat 1.125" Tubular Front Sway Bar
Eibach Rear Sway Bar
949 Racing Spherical Endlinks
5X Racing Brass Shifter Bushing
Existing Mods:
4.1 Torsen Differential Swap
NA 1.8 Brake Swap
Harddog Double Diagonal Roll Bar
Ohlins Coilovers
Napp Motorsports Social Media:
Instagram: / nappmotorsports
Facebook: / nappmotorsports
Contact us via email at: nappmotorsports@gmail.com
![Dyno Testing 8 Of The Most Popular Mods For Miatas! [Project 2SJ Ep8]](/img/n.gif)
Adding a comment to help you guys deal with the algorithm. Keep up the good work, great quality content as always
Thanks!!!
you can get it up to 180whp with individual throttle bodies, some skimming of the head/deck, some more aggressive cams, and a proper exhaust
We did that 😉
Hey guys, good work with that vvt-build!.. if you can, it is worth going e85. My non-vvt 1.8, 1998NB-engine did 167whp@8000~rpm on e85 and the same skunk2-setup as you show here (w racingbeat headers and a freeflowing stainless exhaust of course).. the e85 just allows that little extra ign.timing .. safely
The car is set for E85. On the initial setup the E85 added 5 whp and 5 ft-lbs, so we’re just assuming it’s around the same benefit here. We just didn’t have time to dyno it on ethanol again.
How did you made it to rev up that high? :o
Does it have good low end ot its just for high revving??
4:45 “I’ll give you guys a 3rd gear pull” baaaaaaaa as the Malibu is still on your 8 baaaaaaaa. 😅
Love everything about Miatas, “ but/and they are slow. I’m Just used to 200+ HP in 550lb 2 wheel packages.
*keep up the good work
Thanks! Yeah, it feels "quick" with the added 50whp but i still wouldn't consider it fast. We are solving that this winter with, adding 75-100whp via turbo!
Keep up the great work guys!
Thanks!
If I had to switch my 1.8 on my na I would've gone 1.9 build forged bp with fully balanced rotating assembly, billet oil pump, and ATI fluid damper. Coolant reroute with a cross flow rad then worry about the turbo. Just my thoughts.
The cost to go 1.9 isn’t worth it when a turbo will kick you right to 250 wheel, and then you’re still limited by your transmission at that point. Balanced rotating assembly is a good idea anyways. Dylan has the coolant reroute and we have a big radiator for it already, just need to install it.
At that point wouldn't it be best to just K-swap?
@@AnthonyTrifoglio I’ve heard some bad things about the k swap. It’s good for power but I hear it’s unreliable because of leaks
@@gianfrancod6714I thought it’s the other way around compared to Forced induction set ups?
You got yourself a follower for adding that mark Wahlberg scene in there
5:10 ohhhh noooose
The itchy nose strikes again.
Just here showing my support!
Thanks bud!
Great work you guys did. Can you estimate the cost of all the components under the hood? And are 1000cc injectors really necessary for a 180hp build? Keep up the good work!
1000CC’s definitely are overkill, but he had them from his turbo setup. Anything 400cc or above would be more than enough.
I don’t have an accurate estimate for parts under the hood. Engine parts and machining alone would likely be north of $10k, not including build labor or anything auxiliary.
Running stock cams and valvetrain?
Seems like pretty strong numbers, with the understanding of the “soul killer dyno”
Yeah. The aftermarket cams for VVT’s get super expensive and it’s not worth it for what we’re doing with the car.
Don't turbo it
Too late!
@@NappMotorsports right..
I just bought an NA i want to do this build for my weekender.
Do it. Definitely a great swap.
I'm late to the party cause I was autox'ing my Miata. I feel justified in that though.
Better late than never!!
that front lip goes hard
Thanks! Was on the fence for a while but have fully embraced it.
I don’t have an NA but still wanna know what lip that is.
Did you consider a Rotrex supercharger? Surprised on how many owners go Turbo. If/when I build a 1.8L...Rotrex will be on my wish list for reliability. Thanks for sharing.
We did actually! Check out the Turbo vs. Supercharger episode that we made, we discussed it there. Basically this is mainly a street car, and for fun on the street, turbo felt like the right answer.
Looks great!
Thanks!!!
So the intake and throttle body were a worth while investment especially if you are going to go the turbo option.
If your baseline plan is turbo, it’s kind of arguable if it’s worth it. It’ll definitely set a higher baseline to start with though, and it’ll help up top. Is it work the ~500 in parts? Idk.
Nice built but... No camshaft upgrade? BP5a intake cam is cheap peak hp gain! You probably want to keep your low end torque, you're vvt after all.
Sadly VVT cams are actually quite expensive. It may be on the menu this winter.
@@NappMotorsports Ahh ok I understand, I have a bp4w, cams are cheaper.
How about swapping to 85mm bore pistons with 11:1 CR. Then go with +1mm valves, that should get you to 145-150 ft-lbs of wheel torque and 170 whp. Turbos need not apply.
The car is already 11.5:1. All of those mods are an option for sure, but the cost to do all that starts to get out of hand, and the cost/hp is not worth it.
I wouldn't personally ONLY for the sole purpose of a reliable daily driver and crossing state lines for vacations
goood information man, thank you, i want to make an rx7 four rally in my country Bolivia, and i would like to use a bp engine, but it only NA class so makig 100hp per liter is important
Thanks!
Greetings from the UK.
At the moment I have the skunk2 TB
In short, would you guys recommend the skunk2 manifold too?
1.8vvt
Best wishes great video.
100% recommend the intake manifold. It made a solid difference on Dylan’s VVT.
@@NappMotorsports tks guys
You bet!
-Dylan
Awesome car!
Thanks!
Did you get that 11.5 compression number from the head shave?
Yup. Stock VVT’s are 10.5:1, and every 0.020” off the head adds 0.5 points of compression. So 0.040” adds 1 point, making the total 11.5:1.
Hey guys...what trunk spoiler is that? Only seen that twice and been looking for it ever since...
Galvez customs I believe was the name.
Thank you SO much! Love what you guys are doing!!!
Hey Guys do you provide any support services? I was looking to do a somewhat similar build but with a 97 block and a 01-05 vvt head. I was wondering if I purchased the same ECU you did would you be able to provide a tune for my build? Also would love to add ITBs but that could be at a later date.
We don't offer any type of tuning services. We do use an excellent local tuner on a dyno, and I would recommend seeing if there is a tuner local to you who knows their way around a megasquirt. It's a fairly common platform so there should be a couple.
Awesome
Thanks!
I daily my 01 Miata NB this looks very tempting.
It's a great upgrade.
i also daily an 01 . hoping to get to 150 whp this winter, starting my parts list soon
What front lip is that? Looks dope
AG Limited GVK
Hey what lip is on this? Thanks :)
AGLimited GVK
So just summarise, you've done a head skim, value job, skunt throttle body, and cold air intake?
The whole parts list is in the description, but mainly a 0.040” head shave, valve job, skunk 2 intake manifold and throttle body, and the cold air intake. Full headers and exhaust too. And a Megasquirt with flex fuel.
Umm, Skunk POS intake lost torque from the start of the test to the end and picked up top end horesepower above 6,000 RPM. In a drag race, autocross, or road race the Skunk intake is going to be slower than the stock POS VVT intake. On an NA VVT engine, the only reason to use a Skunk would be for a long course run at sustained high RPM where you run the engine at 6,000Rpm plus for 3-5 miles. Anywhere else, the Skunk is a power killer on a stock or mild VVT NA engine. A used EMD/JMD square top manifold will make better overall power than the stock intake or the Skunk.
We have a Dyno video that proves this wrong for this exact car.
Is that a big upgrade? I have a mint 91 automatic miata and an ok 02 nb manual miata, i never did an engine/tranny swap
A 1.8 swap is a big upgrade over a 1.6, especially when you factor in VVT. I always recommend a 1.8 swap before any engine mods to a 1.6, it’s just not worth modifying the 1.6’s in my opinion.
Thats alot of work for 20hp gain
What year miatas came with vvt? The mazdaspeed ones?
01-05 NB's, not the Mazdaspeed as those were turbo.
Could you have got away with more of a head skim do you know? All the people online that have taken 60thou off have done it with bp4w non vvt.
It’s possible, the only difference is that you would have to be sure the intake cam has clearance at full cam advance with the higher compression pistons on the VVT bottom end. I don’t know for sure how much you can take before that interferes.
I have a stock MX-5 NB 1999 non-VVT 1.8 and here in sweden we have 99 oct fuel available in the pumps. What is your recommendation for the simplest mods that give most power (non turbo)?
I'm thinking some kind of Cold Air intake + bigger throttlebody like you have. And maybe an aftermarket ECU with custom tune?
Intake, exhaust, intake manifold, exhaust manifold. That’s it. And a tune.
Hi guys, excellent video! I'm planning a similar build (1.8VVT into a '99 NB1). Should I use upgraded valve springs? I have a set of the Volvo valve springs forums say have stiffer spring rates. I plan om using the car in autocross with a rev limit at 7400 rpm.
I typically recommend Volvo springs for a budget type build. I actually just installed a set on an engine.
@@NappMotorsports thank you!
After a full day (hub) dyno sessions, managed 157 whp (6500rpm) and 140 ft lbs (5100 rpm) at the wheels. Thanks again for this series!
How did you Come to that compression ratio with that limited shave?
VVT’s are 10:1 factory, and every 0.020” head shave is worth 0.5 points of compression. So a 0.040” head shave is worth 1 point, making 10:1 into 11:1
@@NappMotorsports 11:1 will it be reliable(hot engine)??? and also is it necessary for other cums???
What spoiler is that😍
Galvez Customs
What is ballpark cost for your VVT swap?
I’d say a conservative cost was less than 4K but it might be a bit more how a days due to the rise in prices.
How much would a swap cost at a shop? I have a '92 1.6
Great question, no idea really. Id say there was 30-40 hrs of labor to add on to the parts cost. I'd recommend researching your local shops and seeing what they quote you at.
does this have a lightened flywheel?
Yes sir! It had a 10 pound flywheel at this point.
No dyno on e85 for the bolt ons?
We didn’t have time to do both. The tune already has the E85 scale factor in it, so he can still run corn if he wants. The only thing we’re missing here is knowing exactly what numbers it would’ve made on E85 with the new setup. We just assuming the same 5HP/5Ft-Lbs thing as the first time we tried E85. It’s an NA motor so it’s not really going to benefit much anyway.
what's the 0-60 now boys?
It’s on jack stands, so very slow haha
@@NappMotorsports 😂 ive got a vvt engine sitting here but doubting myself now and wondering if i should just turbo.
@@abgingernuts there latest video shows them going back to NA. That says a lot. I’m doing the same after my supercharged cars too
my 94's engine is shot and I'm considering just swapping in a VVT 1.8 in, any suggestions on what to start lookin into for something like that?
Google “The Ultimate VVT Swap Megathread”. That’s the cheat code for doing the swap. It’s definitely worth it.
@@NappMotorsports
Super appreciated, getting my hands on a VVT next week and will be getting the accompanying hardware from the same place
Would it gap type r’s
Probably not haha
Cool
Thanks!
Needs cams ;) every 10hp matters
We thought about it, but boost is more fun haha
How can you guarantee 180hp at the crank?
Typical drivetrain loss calculations.
@@NappMotorsports which I'm guessing is just a percentage calculation which is incorrect
im just waiting for someone to swap an all motor 2.4 ecotec with a 2.2 head making 300whp lol
People have done the ecotec but I haven’t seen any power numbers.
@@NappMotorsports ive seen quite a few but none of them do any performance mods to them or just arent versed in ecotec performance
Wondering if a skunk manifold & throttle body will benefit a bp05 engine with tomei 252/256 cams and megasquirt. My little festiva is getting out power in my current class
Yeah. Maybe not as much but I’d bet it’ll flow better.