I just did my and my smoke screw i turned it in till i felt it touch the diagram and ended up turning it in 3/4 after driving it start wheel 4 turns from being all the way back stock fuel plate and 3k springs with afc all the way forward and fuel plate it barely smoke on take off very light haze and clean till rpms reach 2800 then it goes back into fueling 34max psi boost
I like my 12 valve clean too. It is just the nature of the beast with a mechanical pump and static timing. If we could make an on the fly timing gear that can work with a more "intelligent" AFC device we could have a better 12v that is still more reliable than any newer truck.
Nice detailed video and adjustment descriptions that you went through to get the truck to where it ran best for you. I've never messed with a P pump before either, and your descriptions will help me know where an approximation might work from my Step Van. I have not seen any other video out there with adjustment descriptions and video. You did an awesome job, and thank you very much for taking the time to post this video!
My favorite way to tune the star wheel with a stock hx35 is by removing it and applying regulated shop compressed air at 35 psi to the afc. Then adjust the star wheel as needed to get full rack travel at 35 psi of boost.
This was very educational for me. I really have been wanting to get rid of the excessive smoke on mine. Thought I had to buy a bigger turbo but really not ready to order it. Will try this instead for the time being
I remember this video .. i many years ago wanted to help my truck it got poor mileage and just seemed lacking in power . So i finally after everyone saying O will burn a hole in the piston. I gave the engine timing the mileage went from 16 to 21 on the highway . 17.5 deg or close to that timing . Power i installed a 10 plate all the way forward. The AFC all the way forward. Gave it some preboost . 3 k governor springs.. 215 injectors..i got them from Piers in Canada . Believe it or not with a automatic i could drive it with a lite foot and it did ok . . But when i installed a g56 things got worse . I finally got tired of the smoke very quickly.. Cruise control was a pain in the butt on hill as the cruise will give the truck more throttle . ..So i orderd the spring kit for the AFC and installed it .i then started adjusting the star wheel back . The truck seemed to run better but it would stll smoke pretty good .. i adjust the pre boost back also ..Finally after a few attempts the star wheel , i loosen up the AFC house and slid it all the way back . That finally got the smoke under control. Still runs good ..shifting through the gears is good . I can if i want make it smoke a bit . But for me its a lot better to drive . . I dont care about high end hp . I just want smooth power and not deal with people. Drama , smoke ..To be honest its still a lot better than it ever was stock .. .
Dude!! Fantastic video. I am professor that loves tinkering with my Jeep with a 4BTAA. I get very frustrated with videos on these mods in a lab/bench. Are you kidding me?! How do you tune or adjust these on a bench? How many 4BTers are modifying 4BTs on a bench? The vids I have seen will inform the viewer how and that is it. As a professor, in my discussions and teaching, if my goal in teaching is start with answering the "why" with the "how" I am successful. I have failed if I don't and students will not get the understanding they need. You did a great job in explaining how, but including the answering the "why." Few UA-camrs do this in their instructional videos. There's several books on this. First one is titled: "Start With Why, by Simon Sinek.
Great video. Appreciate the info. Alot easier to tune a 12 valve than I thought. Putting one in my F350 once the 7.3 decides it needs a major repair. At 317K miles it's anyone's guess how long it will last. Seems to run ok, but we will see. Already have the full conversion kit to mate the 12 valve to the ZF6 manual.
Good video. My 97 is over fueling bad. Not sure who was into it over the years, but constant smoke. Planning on seeing what I can do about it this coming weekend.
Hey I’m diesel tech and my personal truck is a 1997 12v and a few mods I would recommend would definitely be a #10 fuel plate for less low rpm fuel , also I would recommend a new afc spring that is longer I believe the one I put in my truck was from bd diesel and it lets the afc have more travel and a smoother ramp up of fuel with boost
Great Video, one of the simplest on setting up AFC. So many just say "everything full forward!" without a thought to how it all works. Simply getting the preboost dialed in on my truck resulted in better fuel mileage; going from 13 mpg to 15 mpg, mostly city driving. I adjusted mine similar to your method and it's now a blast to drive. Throttle response is so reactive, surprised how little it takes to get moving. I can even cruise @ 65mph with just the weight of my foot on the throttle. Then lean into it and gobs of power on demand. Considered the AFC live, but once you get the AFC dialed in, it's pretty good for most scenarios.
@@Deezle_Gaming when this video was filmed i only have about 8-10 psi of fuel pressure. I just fixed that and will be retuning it again. That's probably the main difference
I’m gonna try your way to tune my 95 12v cummins so I can get max power without bogging the turbo or dumping smoke. I’ve been messing around with it but I can’t seem to figure out just the right combination of smoke screw and star wheel. Thanks for the good video.
exactly how I did my 8.3 in DP now it pulls mountains dragging 33k lbs up no problem.When I got it years ago it would handle steep mountains but barely get up them at 55 . Once did the 75hp throttle plate kit and tune I had no issues holding 65 up and feel it would even accelerate to 75-80 with no problem. I do try to hold around 60-65 to maintain Low EGT temps with 12mpg because even at 70 it drops off 10 mpg and 75-80 about 7mpg With the pump mods. Runs like I am driving a pickup and have to set cruise on long drives or I would often end up past 75 not even meaning to as I followed Trucks.
I got 8.3 in 32ft… flipping rocket in the mountains.. weighs 21 k ,, guessing at 40 lbs boost 1200 degrees 2100 450hp. power clamps crazy above that.. absolutely blows people’s minds … 12 mpg at 70
Reason fuel mileage drops is rpm more then anything.. Cummins at 1500 rpm sips fuel.. makin same power at 2100 twice the fuel… ur rigs need gear change but too expensive.. speed limit was 55 when built.. with tuning easily take tall ratio bet 15 mpg at 70 possible.. I take a lot of two lanes average 50 mph get 15 plus without trying in hills… flat land 75… 8 mpg
Hard to get info on 8.3 pumps when I contacted after market they claimed a 325 pump was already maxed out..they sold nothing for them…. Slid stock plate all the way.. turned up boost.. more then enough fuel for at least 550 hp from stock 8.3 pump.. they aren’t same as pick up pump.. bigger delivery valves plungers move plenty of fuel.. if u haven’t.. turn up waste gate.. at 30 35 psi it’s whole different experience
I got mine tuned to just about perfect for best fuel economy while towing a gooseneck with 30k on it, got a 100 plate and 30 psi of boost, I’d love to be able to turn it down tho for when I haul my 5th wheel and then just drive back and forth to work… I think afc live is in my future lol
I bought a 2nd gen 12v with an s400 and 150hp sticks. Thing smokes like crazy 3rd gear on with light throttle. I haven’t tried adjusting anything yet bc it does run good, but I think it needs some fine tuning
You don’t need a lot of preboost screw, only about .5-1.5 turns past contact with the screw. Any more will make the idle mixture too rich and it will run too rich till it spools the turbo.
@@decentgarage I used to do all my valve adjustments since early 90s, but now I get the kid to do them as he is more flexible. Have you ever used or heard of the 'McKenzie Tool Company B&C TDC LOCATOR PT31793'? A very accurate way to find TDC for pump timing. I have one of the few of these tools ever made.
Do I need to mess with my star wheel if my truck is only Rolling coal pre boost? Or do the smoke screw and star wheel work together so if you adjust one, the other will be off adjustment?
Smoke definitely makes horsepower. I just turned mine down to not smoke. It’s slow af compared to how it was. I could spool 45+ psi through my S366. Now it struggles to go over 30. Turning it back up after I’m done traveling.
Correct. Smoke = more fuel without adequate air supply. So if you are making with more power witlots of smoke this tells you that you need to upgrade the air side of the equation. Fuel is not the only variable
My p pump 12v doesn’t smoke at all no matter what. I wish it would smoke like yours, but only when I really want it to. Are you not running a fuel plate? I have a 100 fuel plate in which is one step below a 0 fuel plate.
Because in America we have "County Fairs". They often have tractor pull events. As a child pulling trucks tuned for max W.O.T. power left such an impression on our young minds we assume that is the way to make power on our personal trucks that are barely used at W.O.T. and need a usuable range of power. Smoke is a by product on an all out competition motor, but many can not distinguish the needs of a comp motor from a mixed use motor. Also in America we feel what we make with our money is our choice and property and I am cool with that too. I am all for simple mechanical motors. We just need bio fuel in warm weather. Stop regulating citizens and step up to Big Oil, Airlines, Shipping, and 3rd world factories.
annoying watching first-timers fiddle around, just put a AFC live on it with a long travel kit on it, then you can fiddle around all day long without having to even pull over. lol. also for adjusting the star wheel, hook it to shop air with a gauge on it, adjust it so it starts moving at about 15 psi depending on your turbo set up.
This is comparing apples to oranges. Sled pulling vs daily driving is a very different scenario. Sled pullers need extreme HP for seconds. They also needs huge amounts of fuel to spoil the turbos they run. This is not the same for daily driven diesel trucks. I'll leave it at that.
Look on DAP diesel thry have a afc spring kit get the springs thry are longer and will work alot better and set the star wheel all the way down. Idk how we can go about it but you can contact me and I can help you more
@@kaydewhipple7696 I appreciate the information. I interested in a longer spring I think as I trying to adjust my afc to reduce the smoke . I tried to reduce the smoke but I adjust the spring back and the truck seems to run better and less smoke but I think I running out of adjustment . So do you know which spring kit is the one to buy as they seem to offer different ones thanks
![Lp. Сердце Вселенной #60 РОЖДЕНИЕ ЛОЛОЛОШКИ [Финал] • Майнкрафт](http://i.ytimg.com/vi/YoR0pAV9FVQ/mqdefault.jpg)
My first time adjusting a P-pump! Go ahead, roast me in the comments OR let's hear suggestions for my next attempt at tuning this thing!
I just did my and my smoke screw i turned it in till i felt it touch the diagram and ended up turning it in 3/4 after driving it start wheel 4 turns from being all the way back stock fuel plate and 3k springs with afc all the way forward and fuel plate it barely smoke on take off very light haze and clean till rpms reach 2800 then it goes back into fueling 34max psi boost
Thank you for cleaning up the Exhaust.
Rolling coal is pointless and not cool anymore
I like my 12 valve clean too. It is just the nature of the beast with a mechanical pump and static timing. If we could make an on the fly timing gear that can work with a more "intelligent" AFC device we could have a better 12v that is still more reliable than any newer truck.
@@D.M.Designs afc live
Good video Brother helped me tune my 96 Hummer H1 with a Cummins 6BT 12 valve
That's awesome, it's always cool to see what people are using these engines for!
Just wanted to say thanks for doing this. I haven't adjusted my AFC yet either and was wanting to see something in truck as opposed to on bench.
Thanks Matthew! We're getting in to some uncharted territory for myself so I feel very vulnerable making videos like this but I'm glad it helped
Nice detailed video and adjustment descriptions that you went through to get the truck to where it ran best for you. I've never messed with a P pump before either, and your descriptions will help me know where an approximation might work from my Step Van. I have not seen any other video out there with adjustment descriptions and video. You did an awesome job, and thank you very much for taking the time to post this video!
My favorite way to tune the star wheel with a stock hx35 is by removing it and applying regulated shop compressed air at 35 psi to the afc. Then adjust the star wheel as needed to get full rack travel at 35 psi of boost.
Great idea!
Any videos of this procedure by chance?
I need someone to show me how to do this
nice! make a vid on that.
This was very educational for me. I really have been wanting to get rid of the excessive smoke on mine. Thought I had to buy a bigger turbo but really not ready to order it. Will try this instead for the time being
I remember this video .. i many years ago wanted to help my truck it got poor mileage and just seemed lacking in power . So i finally after everyone saying O will burn a hole in the piston. I gave the engine timing the mileage went from 16 to 21 on the highway . 17.5 deg or close to that timing . Power i installed a 10 plate all the way forward. The AFC all the way forward. Gave it some preboost . 3 k governor springs.. 215 injectors..i got them from Piers in Canada . Believe it or not with a automatic i could drive it with a lite foot and it did ok . . But when i installed a g56 things got worse . I finally got tired of the smoke very quickly.. Cruise control was a pain in the butt on hill as the cruise will give the truck more throttle . ..So i orderd the spring kit for the AFC and installed it .i then started adjusting the star wheel back . The truck seemed to run better but it would stll smoke pretty good .. i adjust the pre boost back also ..Finally after a few attempts the star wheel , i loosen up the AFC house and slid it all the way back . That finally got the smoke under control. Still runs good ..shifting through the gears is good . I can if i want make it smoke a bit . But for me its a lot better to drive . . I dont care about high end hp . I just want smooth power and not deal with people. Drama , smoke ..To be honest its still a lot better than it ever was stock .. .
16mpg…that’s what i’m getting right now on my 97. i got to figure out my pump.
Dude!! Fantastic video. I am professor that loves tinkering with my Jeep with a 4BTAA. I get very frustrated with videos on these mods in a lab/bench. Are you kidding me?! How do you tune or adjust these on a bench? How many 4BTers are modifying 4BTs on a bench? The vids I have seen will inform the viewer how and that is it. As a professor, in my discussions and teaching, if my goal in teaching is start with answering the "why" with the "how" I am successful. I have failed if I don't and students will not get the understanding they need. You did a great job in explaining how, but including the answering the "why." Few UA-camrs do this in their instructional videos. There's several books on this. First one is titled: "Start With Why, by Simon Sinek.
Curtis I'm glad this was helpful. I'm also a professor so I guess teaching this way comes more natural to me. I'll check out that book for sure 👍
Got a 12 valve I'm about to work on and it's barely running 10 maybe 15psi. After checking boost leaks this will be something I'll check for sure.
Great video. Appreciate the info. Alot easier to tune a 12 valve than I thought. Putting one in my F350 once the 7.3 decides it needs a major repair. At 317K miles it's anyone's guess how long it will last. Seems to run ok, but we will see. Already have the full conversion kit to mate the 12 valve to the ZF6 manual.
Good video. My 97 is over fueling bad. Not sure who was into it over the years, but constant smoke. Planning on seeing what I can do about it this coming weekend.
My 97 does the same thing. It smokes a little all the time.
Set of the LMC Truck door seals arrived this week. They definitely look good, will let you know how they fit/function after the install.
Oh boy!! I'm curious to hear your review
This was a great video. This applies to my 12v 5.9L Cummins and my VW 1.6td idi engine too. (both VE pumps)
If I have an in cab adjustable fuel plate, would the adjuster over ride the smoke screw if it were turned in?
"Rolling coal" is just plain stupid. Thanks for posting a great video on properly tuning the P7100.
Much better tuning. Truck looks like its runs great and right now. Great Job Tim!
Thanks Duddie!
Hey I’m diesel tech and my personal truck is a 1997 12v and a few mods I would recommend would definitely be a #10 fuel plate for less low rpm fuel , also I would recommend a new afc spring that is longer I believe the one I put in my truck was from bd diesel and it lets the afc have more travel and a smoother ramp up of fuel with boost
Great suggestions man! I've since upgraded the AFC spring and that made a huge difference.
Great Video, one of the simplest on setting up AFC. So many just say "everything full forward!" without a thought to how it all works. Simply getting the preboost dialed in on my truck resulted in better fuel mileage; going from 13 mpg to 15 mpg, mostly city driving.
I adjusted mine similar to your method and it's now a blast to drive. Throttle response is so reactive, surprised how little it takes to get moving. I can even cruise @ 65mph with just the weight of my foot on the throttle. Then lean into it and gobs of power on demand.
Considered the AFC live, but once you get the AFC dialed in, it's pretty good for most scenarios.
Glad this was helpful. It's a pretty straight forward process once you understand it
AFC position also matters. My AFC is slid all the way forward the smoke screw is backed all the way out and it still makes a decent cloud down low.
Yeah i didn't mention that but i believe i have my housing all the way forward as well
@@decentgarage That interesting ours are so different on the smoke screw position. Maybe the pump matters too, mine's a 215hp pump.
@@Deezle_Gaming when this video was filmed i only have about 8-10 psi of fuel pressure. I just fixed that and will be retuning it again. That's probably the main difference
Thanks for doing this. I'm new to the p pump cummins and appreciate your time.
I'm new to them as well so corroborate my videos with other information as well
I’m gonna try your way to tune my 95 12v cummins so I can get max power without bogging the turbo or dumping smoke. I’ve been messing around with it but I can’t seem to figure out just the right combination of smoke screw and star wheel. Thanks for the good video.
exactly how I did my 8.3 in DP now it pulls mountains dragging 33k lbs up no problem.When I got it years ago it would handle steep mountains but barely get up them at 55 . Once did the 75hp throttle plate kit and tune I had no issues holding 65 up and feel it would even accelerate to 75-80 with no problem. I do try to hold around 60-65 to maintain Low EGT temps with 12mpg because even at 70 it drops off 10 mpg and 75-80 about 7mpg With the pump mods. Runs like I am driving a pickup and have to set cruise on long drives or I would often end up past 75 not even meaning to as I followed Trucks.
Yeah it's amazing how far some pump tuning will go.
I got 8.3 in 32ft… flipping rocket in the mountains.. weighs 21 k ,, guessing at 40 lbs boost 1200 degrees 2100 450hp. power clamps crazy above that.. absolutely blows people’s minds … 12 mpg at 70
Reason fuel mileage drops is rpm more then anything.. Cummins at 1500 rpm sips fuel.. makin same power at 2100 twice the fuel… ur rigs need gear change but too expensive.. speed limit was 55 when built.. with tuning easily take tall ratio bet 15 mpg at 70 possible.. I take a lot of two lanes average 50 mph get 15 plus without trying in hills… flat land 75… 8 mpg
Hard to get info on 8.3 pumps when I contacted after market they claimed a 325 pump was already maxed out..they sold nothing for them…. Slid stock plate all the way.. turned up boost.. more then enough fuel for at least 550 hp from stock 8.3 pump.. they aren’t same as pick up pump.. bigger delivery valves plungers move plenty of fuel.. if u haven’t.. turn up waste gate.. at 30 35 psi it’s whole different experience
I got mine tuned to just about perfect for best fuel economy while towing a gooseneck with 30k on it, got a 100 plate and 30 psi of boost, I’d love to be able to turn it down tho for when I haul my 5th wheel and then just drive back and forth to work… I think afc live is in my future lol
I really want to go AFC live on Prospector Bob as well!
I bought a 2nd gen 12v with an s400 and 150hp sticks. Thing smokes like crazy 3rd gear on with light throttle. I haven’t tried adjusting anything yet bc it does run good, but I think it needs some fine tuning
You don’t need a lot of preboost screw, only about .5-1.5 turns past contact with the screw. Any more will make the idle mixture too rich and it will run too rich till it spools the turbo.
Yeah i readjusted that. It was too rich
Need to work on my VE tuning. First need to adjust valves as they are a bit clanky.
Check out my valve adjustment video!
@@decentgarage I used to do all my valve adjustments since early 90s, but now I get the kid to do them as he is more flexible. Have you ever used or heard of the 'McKenzie Tool Company B&C TDC LOCATOR PT31793'? A very accurate way to find TDC for pump timing. I have one of the few of these tools ever made.
@@mutantryeff I've never heard of that. Now I'm curious
@@decentgarage I'll see if I can get some photos and forward. It might take a few days.
@@mutantryeff please do. My email is in the video description or I'm on instagram
I really miss my crew. Should have never sold it but life is what it is. Great video. Had to subscribe. When you do the GSK make another video.
I will never sell mine. GSK video is out. Let me know if you can't find it 👍
may want to slide the afc housing and adjust the star wheel from there seems like it would put less pressure on the spring
Do I need to mess with my star wheel if my truck is only Rolling coal pre boost? Or do the smoke screw and star wheel work together so if you adjust one, the other will be off adjustment?
Smoke definitely makes horsepower. I just turned mine down to not smoke. It’s slow af compared to how it was. I could spool 45+ psi through my S366. Now it struggles to go over 30. Turning it back up after I’m done traveling.
Correct. Smoke = more fuel without adequate air supply. So if you are making with more power witlots of smoke this tells you that you need to upgrade the air side of the equation. Fuel is not the only variable
Great video! Thanks for the in-truck view of things. Very helpful!
Glad it was helpful!
I need those seats and center console!
Great video, I learned something I didn't know that I didn't know 👍
Thanks man! Audio will be taking a step in the right direction thanks to you 👍
@@decentgarage looking forward to it
35 psi of boost is the magic number for performance and efficiency with a 12v and a stock hx35 turbo
Finally got it there with a new lift pump
So the smoke screw could use adjusted if the engine has a hard cold start issue, even when it’s not very cold, just sits overnight?
Yes, but another tip if you have hard starts is to just bump the throttle real quick when you start it 👍
Or try replacing your fuel filter
My p pump 12v doesn’t smoke at all no matter what. I wish it would smoke like yours, but only when I really want it to. Are you not running a fuel plate? I have a 100 fuel plate in which is one step below a 0 fuel plate.
Mine has a 100 fuel plate as well
Keeping watching the videos on this truck. I just barely got it running good.
And this episode sponsored by Sonic drinks 🤣
Yeah, no more depends!
Keep up the good work Tim, you help a lot of us.
The sonic cup was unintentional haha but hey now we have another unofficial sponsor 🤣
Power driven diesel makes a afc live kit for p pumps
Great video. 👍
Thanks! 👍
Egt is best way…only way to know really.. at 20 psi I like 1000 max at full send 1200 1250… with haze u got now it’s too hott for sure
Thanks Tim
Thanks David
I like all your videos and the projects you do I always find something that helps me with my projects thank you for your time David
Much obliged
Thanks
Hello, I'm from Germany, why do so many Americans love to let their trucks soot? Greetings from Germany🤗
Yeah, not sure about that either but i hate when people roll coal.
Because in America we have "County Fairs". They often have tractor pull events. As a child pulling trucks tuned for max W.O.T. power left such an impression on our young minds we assume that is the way to make power on our personal trucks that are barely used at W.O.T. and need a usuable range of power. Smoke is a by product on an all out competition motor, but many can not distinguish the needs of a comp motor from a mixed use motor. Also in America we feel what we make with our money is our choice and property and I am cool with that too. I am all for simple mechanical motors. We just need bio fuel in warm weather. Stop regulating citizens and step up to Big Oil, Airlines, Shipping, and 3rd world factories.
N o matter what I adjust,the only way I hear the turbo is air cleaner 90 pipe removed
What year is your truck and what turbo.
@@decentgarage 97 stock,4inch exhaust,12 valve 0 plain fuel plate
@@johnmaxx4818 have you pulled the silencer ring out of your hx35 turbo?
@@decentgarage yes
@@decentgarage I believe it's in the AFC housing you know the smoke screw or the spindle
Do you have a fire alarm fan in your family?
I love you bro your awesome
I know 😅
Much better to burn the fuel inside the engine where you can make horsepower with it, rather than making mini charcoal crickets.
Put AFC LIVE on it from Power Driven Diesel
That's going to be coming soon
Why would you not want to roll coal? You need the option to roll coal so you can roll coal on teslas. 🤦🏻♂️
Greta thornberg approved this message
She most certainly did
annoying watching first-timers fiddle around, just put a AFC live on it with a long travel kit on it,
then you can fiddle around all day long without having to even pull over. lol.
also for adjusting the star wheel, hook it to shop air with a gauge on it, adjust it so it starts moving at about 15 psi depending on your turbo set up.
Sorry to annoy you... 😔
Soooo all the truck and tractor pulling guys are doing it wrong? Smoke obviously = power, the millions of truck and tractor pullers are NOT wrong!
This is comparing apples to oranges. Sled pulling vs daily driving is a very different scenario. Sled pullers need extreme HP for seconds. They also needs huge amounts of fuel to spoil the turbos they run. This is not the same for daily driven diesel trucks. I'll leave it at that.
Look on DAP diesel thry have a afc spring kit get the springs thry are longer and will work alot better and set the star wheel all the way down. Idk how we can go about it but you can contact me and I can help you more
I'm still trying to research the AFC spring. I've heard mixed reviews on running a stiffer spring.
The after market springs are not stiffer ...they are longer and are way more tunable
@@kaydewhipple7696 interesting! That sounds like what I want then. Thanks for the clarification
@@kaydewhipple7696 I appreciate the information. I interested in a longer spring I think as I trying to adjust my afc to reduce the smoke . I tried to reduce the smoke but I adjust the spring back and the truck seems to run better and less smoke but I think I running out of adjustment . So do you know which spring kit is the one to buy as they seem to offer different ones thanks