500hp vp!! (f*ckin turbo lag!!)

2fstcummins

2fstcummins

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Aug 18, 2009
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allright so i just bought a 2001 cummins h.o. i sold my two twelve valves for it, but it came with a pretty good set-up in my opinion... but the turbo lag kills me!! i can't stand it! i want to push 500hp here's my current setup if any sujestions on what has worked for you please help.

intake
stock turbo
65hp injectors
propane injection
fully built transmission
ats three peice manifold
four in down pipe to five inch back
edge juice w/out stage six unlocked yet
.. and i think thats it for right now..

my plan is to add water methonal injection, and turbo right away...
what is the best turbo for drag/street??

any guess on what i'm pushing as far as power right now? and quartermile times??
 
Your only going to have worse lag with a different turbo.

The stocker should spool fast! Check for boost leaks and make sure your wastegate is working.
 
Somethin is up man lag with a stocker somethin is wrong loose the propane unless your usin is for mileage, you don't even need the water get yourself a good set of sticks an SO pump fass system or airdog lockup switch maybe a 62 turbo and you'll be golden
 
Your probably around 350hp and if you've got lag with a stock turbo with a stick then you've got something broken. What kind of boost are you pushing? Also, you might also not be used to how the VP fuels yet. The p-pump is very linear whereas the VP is not. You've gotta give it some throttle before it responds. Also, depending on the converter setup it could make it feel laggy. Your converter might be very tight. Can you give us some more specs on the transmission? What kind of boost, egt's, fuel pressure are you seeing?
 
I had 65hp injectors with my stocker and with any programmer boost was instantaneous. If you have lag you either have boost leaks or something broken... it should spool so fast its practically undriveable(mine was)
 
i'm pushing 24psi under full throttle stage 5, my fuel pressure sets at 15/16 and goes to about 5 under full throttle, the trannsmission has and ats tourque converter all billit shafts, deep pan, valve bodie, shift kit, and i think thats about it.
i don't run the pane, because i don't know **** about the set-up and i am still trying to figure out the truck as is.
i'm thinking about going with the silverbullet 66??
 
You need to up your feed pressure before you cook your VP. With those sticks you should be getting more boost. Is the WG adjustable or does it just have that elbow that comes with the edge? Try pinching it off entirely and go for a ride.
The 66 is too much turbo for your goal and will be very laggy around town, especially if your converter is tight (sounds like it might be). Think about a 62 from HTT or a SuperB Special (64/71/14) and some larger injectors. I'm not a fan of propane for anything, but do what you want there. I would not run water/meth at all, especially if you are still running stock headbolts.
 
First, get your fuel pressure above 10psi at full throttle.

Second, 24psi is low. Get it up to around 35psi. Check for boost leaks.

Third, if you think the stock turbo is laggy don't even think about going to a silver bullet. It's about 10x laggier than a stock turbo and your going to need WAY bigger injectors than what you have now. Think 200-240hp.
 
For 2000.5 - 2003 Dodge Ram’s Powered by Cummins Diesels The BD Racer Anti De-fueler over rides the Cummins torque management system that limits a high rate of vehicle performance. When 1/4 mile racing with the Cummins 24 valve engine, the Cummins computer limits the amount of torque put out by the engine. This torque management results in a reduction of power that can be felt as a quick momentary decrease of power throughout first and second gear. This drastically hurts your 1/4 mile time and as well seriously jeopardizes your engines drivetrain.

BD’s Racer Anti De-fueler applies to most 2000.5 and newer Xtreme Performance automatic trucks used for 1/4 mile racing. A toggle switch is also included for you to select street mode or race.
 
nrose07 said:
For 2000.5 - 2003 Dodge Ram’s Powered by Cummins Diesels The BD Racer Anti De-fueler over rides the Cummins torque management system that limits a high rate of vehicle performance. When 1/4 mile racing with the Cummins 24 valve engine, the Cummins computer limits the amount of torque put out by the engine. This torque management results in a reduction of power that can be felt as a quick momentary decrease of power throughout first and second gear. This drastically hurts your 1/4 mile time and as well seriously jeopardizes your engines drivetrain.

BD’s Racer Anti De-fueler applies to most 2000.5 and newer Xtreme Performance automatic trucks used for 1/4 mile racing. A toggle switch is also included for you to select street mode or race.
Click to expand...


ummmm.... ok :bang:bang:bang

even if there is a point to that, the BD Rad is a piece of crap
 
I was in a hurry and just copy pasted the description, point being if he has nothing to defeat the torque management and he suffering from turbo lag this might be his issue.
 
Stock turbos don't lag. That's the end of it. If the stock turbo is laggy and he's only pushing 24psi of boost then there's obviously gotta be a problem somewhere.

Why is the BD rad a POS? I love mine and everyone I know that runs one loves theres.

Try borrowing a smarty and see how that helps.
 
how do i get my fuel presure up? i'm not sure if i put i have a fass fuel pump as well brain fart sorry, and the big line kit too, should'nt that help my fuel presure?? i'm going to go out and mess around with the turbo right now i'll let you know.
 
If your FASS is only giving you 5psi at WOT then it's not working to it's full potential either.
 
so it's not wastegated, and i'm not sure what line you're talking about to pinch off can you help out please?
 
It's not wastegated? As in the wastegate isn't hooked up at all? If that's the case then there's your lag problem right there. There is no line to pinch off on yours (BTW, your truck is an SO, not an HO) because the factory HY35 has a hardline wastegate. What you need to do is get a turnbuckle and hook it to the arm from the wastegate to the little bracket on the front of the turbo that the wastegate attaches to to keep the wastegate shut. That will cure your lag problem and your low boost problem.

The wastegate allows excess exhaust gasses to bypass the exhaust wheel to help keep the boost in control. If the gate is unhooked and is just left hanging open then it's dumping those exhaust gasses constantly and not allowing any to go through the exhaust wheel to spool up the turbo. You need to shut that gate so that way it will run all of the exhaust gas through the exhaust wheel and spool the turbo up. Just make sure you keep the boost around 35psi. Above that and your only making hot air and risking blowing your turbo up.
 
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