Brother just bought a used 300C SRT8 and wants to install a GCM supercharger

[Sled]

I directed him to this thread. It's hard to believe that a company (GSM) would put out a product that is so underdeveloped and can potentially cause engine failure. Hasn't some one considered a lawsuit, yet?

[NYC_SRT8]

Originally Posted by Sled

I directed him to this thread. It's hard to believe that a company (GSM) would put out a product that is so underdeveloped and can potentially cause engine failure. Hasn't some one considered a lawsuit, yet?

I have not heard of anyone taking the legal route...seems very odd. They must be small print somewhere thats saving 'them'.

[Chrispy]

The supercharger itself is not necessarily the big problem.

Running 6-8 pounds of intercooled boost will work fine in the SRT8.

The problem is lack of custom tuning available that you can use on the street and on a load based dyno (eddy current or similar).

If there was a proper tuning package available and you could tune the spark, AF and program for injectors etc you would be able to dial in the car perfectly.

I ran 9#'s boost on a stock motor LT1 Z28 for 3 years and never popped a ringland. (ran 11.80s at 120mph)

Also ran a SC on a 98 Formula without problems on 6#s boost and ran 11.40s at 124mph on the stock motor.

Tuning is the key....

[vvv90]

Originally Posted by Chrispy

I ran 9#'s boost on a stock motor LT1 Z28 for 3 years and never popped a ringland. (ran 11.80s at 120mph)

I'm running 9psi on a stock LT1 Vette. 11.80's...Pretty impressive, what kind of tire, auto or manual?

[NYC_SRT8]

Originally Posted by Chrispy

The supercharger itself is not necessarily the big problem.

Running 6-8 pounds of intercooled boost will work fine in the SRT8.

The problem is lack of custom tuning available that you can use on the street and on a load based dyno (eddy current or similar).

If there was a proper tuning package available and you could tune the spark, AF and program for injectors etc you would be able to dial in the car perfectly.

I ran 9#'s boost on a stock motor LT1 Z28 for 3 years and never popped a ringland. (ran 11.80s at 120mph)

Also ran a SC on a 98 Formula without problems on 6#s boost and ran 11.40s at 124mph on the stock motor.

Tuning is the key....

Originally Posted by vvv90

I'm running 9psi on a stock LT1 Vette. 11.80's...Pretty impressive, what kind of tire, auto or manual?

I bet neither of you guys had a 9th injector wedged in between the throttle body and the intake manifold shooting gas in a place where it was never meant to be...

[srt8danno]

Just have your bro think long and hard before making such a commitment. There is much to read about this type of stuff. The SRT8 is a blast to own and I hope he is able to enjoy it to its fullest. Good luck!

[Chrispy]

Originally Posted by vvv90

I'm running 9psi on a stock LT1 Vette. 11.80's...Pretty impressive, what kind of tire, auto or manual?

Thanks This was back in 97-98, ATI actually used my car in their print ads across NA. (Mine was the red Z-28 launching at the dragstrip in their print ad)

Bone stock LT1 motor, 315 Drag radials, stock 3.42 gears, centerforce clutch, 5000rpm launch and a 1.91 sixty. Full weight too, nothing removed. Took constant tuning and scanning but it ran like a champ

Cheers
Chris

[vvv90]

Originally Posted by Chrispy

Thanks This was back in 97-98, ATI actually used my car in their print ads across NA. (Mine was the red Z-28 launching at the dragstrip in their print ad)

Bone stock LT1 motor, 315 Drag radials, stock 3.42 gears, centerforce clutch, 5000rpm launch and a 1.91 sixty. Full weight too, nothing removed. Took constant tuning and scanning but it ran like a champ

Cheers
Chris

That's crazy, I have almost the same setup. ATI P1-SC, Bone stock LT1, 315 drags, 3.54 gears though. No 5000rpm launch though. IRS won't allow it. It did get a 1.9 shorty and ran an 11.98 as my best. (then the accident ocurred, been in garage ever since. This Spring she'll look pretty again.)

EPA doesn't require anything older than a 95 to go to emissions anymore...Looks like a set of ceramic headers with cut outs and no cats are in my future.

[DanRealtor]

Originally Posted by HalV48

I think ASM designed there setup based on the 5.7.

There was an ASM 5.7 SC car at the Rumble in the Desert running 14.5's at 96MPH. I didn't hear any issues that would say it wasn't running right. He ran all day, even in one of the brackets. No offense against the owner of the car, but we where all expecting much more from the ASM setup.

That's alot of money to run mid-pack stock times.

IMHO they have alot of balls offering a 4K something kit to make the GSM run better. Seems like a little more R&D on there own systems is needed before they worry about someone else's so-called issues.

I would talk to Scott at GSM before making any decisions.

Why run in the 11's (with a GSM SC) when you can run 14's with another brand???

[Chrispy]

Originally Posted by vvv90

That's crazy, I have almost the same setup. ATI P1-SC, Bone stock LT1, 315 drags, 3.54 gears though. No 5000rpm launch though. IRS won't allow it. It did get a 1.9 shorty and ran an 11.98 as my best. (then the accident ocurred, been in garage ever since. This Spring she'll look pretty again.)

EPA doesn't require anything older than a 95 to go to emissions anymore...Looks like a set of ceramic headers with cut outs and no cats are in my future.

Nice setup man congrats I also had SLP headers on the car and catback (no cutout)

Cheers
Chris

ps- Sorry for the hijack!