Need some help for Next MOD? - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


Performance, Brainstorming & Tuning Talk about modifications, or anything else associated with performance enhancements. Have a new idea for performance/reliability? Post it here. No idea is stupid! (please use Detailing and Appearance for cosmetic ideas)

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Old 06-03-2004, 06:06 PM   #1
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Default Need some help for Next MOD?

ok...so I have some choices for the next mod...

1. Rockers
2. High Flo Cat
3. Custom FWI
4. 3.25 ( After Rockers of course )


but I was looking at the Grand Prix Store and was noticing some MODS that are an option to me...and I wanted to see who has them, and if they are worth it or not...

http://www.pfyc.com/store/merchant.m...y_Code=GPUNDER


1. AutoTrans Interceptor

2. Throttle Position Sensor Enhancer

3. Adjustable Fuel Pressure Regulator

4. MSD Ignition Coils
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Old 06-03-2004, 08:26 PM   #2
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Ehhh, I would say just go with the rockers for the sure gain. Might want to look at one of those other devices to compliment it, maybe the Regulator might benefit. A lot of fancy names for nothing it seems like. Im sure it can help your car out, but I dont think you will get to much performance from just those mods alone. (The second list)
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Old 06-03-2004, 09:05 PM   #3
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1. not needed, get a shift kit or custom pcm.
2.you can do this yourself, check here.... http://www.geocities.com/carnutguy/c...hancement.html
3.
Quote:
Do I need an adjustable fuel pressure regulator (AFPR)?

On many boosted cars fuel pressure needs to be raised as boost is added to compensate for extra air. The 3800 FWD supercharged engines use several methods to control fueling, which render an AFPR worthless in many cases. The MAF sensor reads the airflow and tells the PCM how much air is coming in and therefore how much fuel to deliver. The MAP sensor monitors manifold pressure (vacuum or boost) and fueling is adjusted by the PCM. The ECT sensor monitors engine coolant temperature and also has some effect on fueling. And then the front oxygen sensor (B1S1) monitors overall air/fuel performance and tells the PCM how well the actual air/fuel matches the desired air/fuel.

As you begin to mod and increase the overall airflow of your engine, the MAF and MAP sensors detect the increased airflow and/or boost, and the PCM automatically lengthens your fuel injector pulsewidths to compensate. The stock fuel pressure regulator (FPR) changes fuel pressure with vacuum or boost. As your boost increases so does your fuel pressure. By changing this function by replacing the factory regulator you run the risk of making your car more difficult to tune. Using an AFPR to increase static fuel pressure may not change the maximum pressure available because the stock L67/L32 fuel pump usually can't reach 70 psi on most vehicles. So even if you might add five psi of fuel pressure at idle and cruising, you may only be adding a pound or two at WOT. And this loss of linearity can make tuning the car a nightmare.
Taken from Intense racing site.
4. The coils are more cosmetic than a performance gain, our stock coils are plenty strong enough for the horsepower we're making.
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Old 06-10-2004, 01:39 AM   #4
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what about the AutoTrans Interceptor ?
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Old 06-10-2004, 02:23 AM   #5
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not needed, you need a shift kit or a custom burned PCM
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Old 06-10-2004, 11:44 AM   #6
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Default Re: Need some help for Next MOD?

Quote:
Originally Posted by blackssei
1. AutoTrans Interceptor
Useless, get a shift-kit or PCM
Quote:
Originally Posted by blackssei
2. Throttle Position Sensor Enhancer
TPS is ineffecient and a waste of gas and money, get a PCM
Quote:
Originally Posted by blackssei
3. Adjustable Fuel Pressure Regulator
I dont think you need this at your mod stage.
Quote:
Originally Posted by blackssei
4. MSD Ignition Coils
Our stock coils are plenty. Some of the GP ppl have had problems with these and the thick MSD wires. I would stick to the stock coils and wires. Cheap, and they work
Quote:
Originally Posted by blackssei
ok...so I have some choices for the next mod...

1. Rockers
2. High Flo Cat
3. Custom FWI
4. 3.25 ( After Rockers of course )
Get the FWI, then the rockers, then a PCM, then headers, then HF cat, then MAYBE you can run a 3.25 pulley with little KR.
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Old 06-10-2004, 08:48 PM   #7
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I'd suggest this

Intake
PCM
3.4
Rockers + OR Pushrods
Exhaust work
3.2
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Old 06-10-2004, 10:55 PM   #8
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Do new pushrods alone do anything by themselves?
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Old 06-11-2004, 12:01 AM   #9
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The Oil Restricted ones supposedly give you some more power, and get oil flowing better. Intense has them on their website, and I know Rogue is thinking about them...
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Old 06-11-2004, 12:25 AM   #10
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Quote:
Originally Posted by BonneMeMN
The Oil Restricted ones supposedly give you some more power, and get oil flowing better. Intense has them on their website, and I know Rogue is thinking about them...
They have been in for a while. They have a metered oil hole in them that keeps the lifters pumped up allowing you to rev faster, higher, safer. These in combination with 1.9 rockers, 105# springs and retainers, PCM, and roller timing chain should allow you to rev to 7,000 RPM quite safely.
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