How Much Power Is Possible Turbo And 98 Pcm???
How Much Power Is Possible Turbo And 98 Pcm??? I am going to be installing a 402 in my 98 within the next month or so and I need to know if I should go ahead and switch the engine harness, body harness, PCM etc over to a 99-up style to make the most out of the turbo setup.
I only plan to run about 15psi or less, whatever I can run on pump gas, so I need to know if I really NEED to switch over or if I can get by without.
I have searched without much luck so any help is greatly appreciated. I just need to know if I should start buying 99-up stuff or wait until I get the engine and turbo installed and see if I really need it.
I only plan to run about 15psi or less, whatever I can run on pump gas, so I need to know if I really NEED to switch over or if I can get by without.
I have searched without much luck so any help is greatly appreciated. I just need to know if I should start buying 99-up stuff or wait until I get the engine and turbo installed and see if I really need it.
9 Second Club
Joined: Nov 2001
Posts: 1,445
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From: Bay Area, CA
you can run speed density with that pcm, you have to trick it though. 2 bar map and some smart tuning, and it isnt a problem at all up to 210 KPA(15 psi), it will cut your resolution down, but it doesnt appear to have any ill affects on drivability with the cars I have done, find yourself a local compentent tuner that can do this for you, and you are good to go 
oh and as far as power that depends on the setup, 15 psi on the right engine combo could make a lot of power, a better question is, can your fuel system handle it?
oh and as far as power that depends on the setup, 15 psi on the right engine combo could make a lot of power, a better question is, can your fuel system handle it?
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From: Hinckley [Cleveland], Ohio
We at GMR made 724 RWHP and 740 RWTQ with stock 98 PCM with the MAF still being used, no good after about 600 HP but you arent always at full throttle on the street, so this makes driveability much nicer. BTW we hit 17 psi, could have went higher but getting close to the end of the injector.
-Leo
-Leo
Well my MAF is long gone so that shouldn't be an issue. A friend of mine has already tuned the car SD and it runs fine off the secondary VE table but I didn't know if running off the primary VE table was required at some point or to run certain boost levels. I know that a proper fuel system is necessary. I will probably run a dual external fuel system like the LS1speed race kit.
What is a good 2-bar map sensor to use? I work at a GM dealership so I was wondering if an OEM sensor from like a Cobalt SS would work or something of that nature. Also, what size injectors are needed for a 402/T88 and about 15psi? I was thinking in the 60-72lb range?
What is a good 2-bar map sensor to use? I work at a GM dealership so I was wondering if an OEM sensor from like a Cobalt SS would work or something of that nature. Also, what size injectors are needed for a 402/T88 and about 15psi? I was thinking in the 60-72lb range?
Staging Lane
Joined: Dec 2001
Posts: 71
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From: WI
Speed Inc. said that I could not use my boost controller (eboost2), or any boost controller for that matter, with the 98 pcm without going to BS3. The 98 pcm would only allow them to tune the car for one specific boost setting, so they had to change it to a 99+ pcm. It's a 3 bar system. I'm only running 15 psi. I lost a few functions including traction control and they can't get rid of the check engine light (not good for IL emission testing).
Last edited by Casper; Mar 8, 2006 at 05:29 PM.
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Yeah I would definitely need to be able to use a boost controller. I guess I will probably try to do the swap while changing the engine. So much work though with the dash harness and all... 
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3 bar MAP here... 98 PCM Im using the MAF T Pro...... driver box and 96# injectors....
with a 402 and a 88mm turbo...... good luck... 60# injectors are going to run out of steam real early.... unless you want to tax your pumps and run crazy FP like MM did... 80 psi...... of FP.
Kyle
with a 402 and a 88mm turbo...... good luck... 60# injectors are going to run out of steam real early.... unless you want to tax your pumps and run crazy FP like MM did... 80 psi...... of FP.
Kyle
TECH Resident
Joined: Jan 2004
Posts: 832
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From: Castro Valley, CA
Casper, that doesn't sound right. I'm under the impression that the '98 is tolerant of going to the 2bar MAP sensor and SD tuning... which means that your tune will be responsive to boost changes. And that should mean that the features of a boost controller would still be usable.
Originally Posted by NA$TY-TA
3 bar MAP here... 98 PCM Im using the MAF T Pro...... driver box and 96# injectors....
Kyle
Kyle
Dave its a piggy back box from MAFT-Pro. It has 2-3 bar capabilities as well as boost control(has to be bought seperately)
You can get the low down on the set up if you go to http://www.fullthrottlespeed.com/ite...050MAFTPRO.htm and look under the maft-pro stuff.
I run HPT and 2 bar on my 98, Rick@synergy set me up with it, just halving the VE tables...looses some resolution but so far its been great.
J
You can get the low down on the set up if you go to http://www.fullthrottlespeed.com/ite...050MAFTPRO.htm and look under the maft-pro stuff.
I run HPT and 2 bar on my 98, Rick@synergy set me up with it, just halving the VE tables...looses some resolution but so far its been great.
J
Originally Posted by MIGHTYMOUSE
hpt have the 98 2-3 bar released? or is this some stenod home brew?
Ill post up more info soon.
Kyle
Originally Posted by NA$TY-TA
Its using the MAF T Pro...... 98 PCM still controls timing and normal functions.. using HP Tuners....
Ill post up more info soon.
Kyle
Ill post up more info soon.
Kyle
Originally Posted by NA$TY-TA
Its using the MAF T Pro...... 98 PCM still controls timing and normal functions.. using HP Tuners....
Ill post up more info soon.
Kyle
Ill post up more info soon.
Kyle
Chad
Originally Posted by NA$TY-TA
3 bar MAP here... 98 PCM Im using the MAF T Pro...... driver box and 96# injectors....
with a 402 and a 88mm turbo...... good luck... 60# injectors are going to run out of steam real early.... unless you want to tax your pumps and run crazy FP like MM did... 80 psi...... of FP.
Kyle
with a 402 and a 88mm turbo...... good luck... 60# injectors are going to run out of steam real early.... unless you want to tax your pumps and run crazy FP like MM did... 80 psi...... of FP.
Kyle
Originally Posted by MIGHTYMOUSE
wow, 2 bar on a 98 with hpt and 2-3 bar with 98 on a maft pro.
u guys got it easy these days i tell ya.
u guys got it easy these days i tell ya.
Hey someone had to lead the way David... i feel ya brother.....
