I am interested in a supercharger for my `92 350 TPI Z28. I want to know what would be the best approach for a mostly stock motor. I also would like to know what would be a safe boost level for the stock bottom end. I am interested in both Pro-Charger or Vortech systems. Thanks for any replies from supercharger users.

 

6 psi and no more than 8 for stock.

 

Thanks for your reply BADASS383. I currently race an 87 Grand National and know that it will handle upwards of 24 pounds of boost with stock internals.I was unsure of the Camaro and boost.

 

I am interested in a supercharger for my `92 350 TPI Z28. I want to know what would be the best approach for a mostly stock motor.

To be in the safe side, limit your boost to 6-psig non-intercooled with no other modifications (i.e. water injection or retarding timing) or 10-psig intercooled.


I also would like to know what would be a safe boost level for the stock bottom end.

You'd be surprised how stout the 305/350 blocks are. The weak link would be the cast pistons. With stock pistons, the limitation is what I stated previously. With forged pistons, you can build a lot more boost. I've done it.


I am interested in both Pro-Charger or Vortech systems.

Both good systems, but each company has different approaches to making power. Vortech's kit includes a boost timing module. ATI's kits include an intercooler(s). Which is "better" and why? I think the answer is obvious. Both methods reduce/eliminate detonation. We all know that retarding timing on any engine, whether it be supercharged, nitrous injected or normally aspirated, causes a power loss. Intercooling allows more aggressive timing. This is why I chose ATI.

Also, I love ATI's self-contained head units. No oil lines to run to the engine.

You also might want to check out this thread:

http://www.thirdgen.org/techbb2/show...hreadid=159832

It contains some more information somewhat related to this topic.

 

A GN is a totally different beast that a TPI motor. 8:1 compression vs. 9.5 for a TPI. The GN is intercooled which makes a big difference. The GN is also set up for boost from the factory so that the spark and fuel maps are all setup for it. An aftermarket blower kit for a TPI usually only comes with an analog/mechanical FMU to get the A/F ratio "roughly right" plus no changes to the spark advance tables.

6 PSI non-intercooled would be about as far as I'd push it on pump gas and expect any kind of longevity from the motor. Intercool it and you can go higher. Get the programming set up perfectly to run in boost and you can go higher. Build the motor internals specifically for a blower application and you can go much higher. Combine all 3 and the sky's the limit.

 

Thanks for all the replies; I just want to stay ahead of the blue oval boys. Most of the Mustangs around my parts are addicted to the spray which lasts for awhile; but I would prefer boost and torque on demand, utilizing a blower or turbo.

 

I would go with ATI for the same reasons as Willie. I'm waiting for my kit to get here. I have 10.9 to 1 C/R. I am only going to use 4-6 psi of boost. ATI was the only company to help me with my setup. Vortech did not want to help me.