DP and cat major bottle necks?? - Saab 9000 Bulletin Board - Saabnet.com
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DP and cat major bottle necks??
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Posted by shortlid (more from shortlid) on Tue, 7 Mar 2006 14:18:07 Share Post by Email
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My question is, does it make sense to increase the diamter of the DP and cat, then keep the stock system from there back? I have a stock '95 Aero, and I know that turbo cars gain the most from exhuast systems.

This is taken from a Bob Davis previous post.

"There isn't much point in a 3" system if the downpipe is smaller. In fact, the DP is the most important element if you're trying to reduce EGT's (exh. gas temps). If this is your main goal--to mitigate the effects of increased boost, for example--you can reduce it starting at the rear cat outlet if you wish. If reducing back pressure is important, probably not a factor except in extreme performance upgrades, you'll want to go 3" all the way back.

I installed a 3" system and kept it that size to the tip, which I kept at the stock 2¼" so I could reuse my Aero exhaust tip cover. I have basically the same system as Zeke except for the tip reduction and the SS muffer. The middle muffler (resonator) has been eliminated"

posted by 64.140.203...

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