I searched around a bit on the forums and couldn't find an answer to these questions. I'm thinking of getting the Ceramic coated Pace Setter Headers for the Ecotec 2.2L. Now having these headers, will it cause a problem getting the GM Super Charger thats in the GM Sport Compact Build Book to fit. Also, I have an AEM Cold Air Intake installed, will I be able to modify that to get it to fit to the super charger? And lastly, I'm thinking of getting the 62 mm Throttle Body from RSM racing, will that have any issues with the super charger?
Your header will have nothing to do with your supercharger...
Your supercharger runs off your crank pulley and is on the intake side, your header is on your exhaust side. Nothing to worry about. Now, opening up your exhaust system when boosted is always a good thing...2 1/2" everything should be good.
www.kronosperformance.com / 732-742-8837
Thanx for all the help. But for the exhaust I was gonna go Custom 2 1/4" with a borla muffler, will that be ok?
seems like your questions have been answered well. i will emphasize what NJHK said, 2.5 is a good size for zaust. you want to be expelling as much gas as possible when forced induction is used. the more gas that can be expelled, the more that can be forced into the combustion chamber. 3" is also do-able although routing problems and rubbing problems on lowered cars can come into play.
For a supercharger application a 2.5" exhaust is fine. You really dont need more then that with a GM charger. As for the header is it nessesary, no, but it a very good idea to compliment the charger. Just as a referance if you install the charger before the header do not be surpised if you notice less boost after header install. Remeber boost is a general pressure, CFM is what counts. As for the throttle body, 62mm is perfect with the charger.
2002 Z28: Slp coldair Pac, Corsa Catback, 3200 stall
i'm afraid i'm gonna have to disagree with you on a couple of your points there. 2.5 is fine but 3" in optimal for forced induction and nitrous use and adding a header will not decrease boost. why would it?? my boost held more steady through the RPM's and remained the same if not a tad bit more when i added my header.
is it gonna cause a problem if the header downpipe is 2.25 and you have a 2.5 pipe for th rest of the system?
Boost is a general # based on restrictions and pressure. If you have a factory manifold that is restictive, on a higher boost motor (with a charger) you will see a pressure drop IE less boost but a higher volocity. Also if you are running around 6 lbs and less there is no need for a 3" exhaust. My LS1 has a 3" exhaust and is more then capable of flowing a Heads/cam Combo. Your motor will not flow enough air to justify a 3" exhaust, just noise. The proper combo of a 2.5 collector, piping, high flow cat and muff will give a better power band. But everyone is entitled to their opinion. We found that 2.5 was perfect on BlackZ2401's high boost Cav.
2002 Z28: Slp coldair Pac, Corsa Catback, 3200 stall
well i guess we'll just have to agree to disagree cause there is tons of literature that says differently even for a small displacement 4cyl. i've also seen the difference, dyno wise, between 2.5 and 3 on a modestly boosted vehicle. hell even on a naturally aspirated vehicle. i've seen dyno charts for runs with a stock zaust manifold just going from 2 to 2.25 to 2.5 and then too 3". the gains are evident.
Chase Hess wrote:is it gonna cause a problem if the header downpipe is 2.25 and you have a 2.5 pipe for th rest of the system?
it will cause no problems at all.
) The 62mm TB is good with Turbo/Supercharged cars, but not so good for N/A cars, so good choice. 
