Re: Upping the HP Ante - Saab 9000 Bulletin Board - Saabnet.com
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Re: Upping the HP Ante
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Posted by zeke (more from zeke) on Tue, 8 Jul 2003 07:08:52 Share Post by Email
In Reply to: Upping the HP Ante, Wesley, Mon, 7 Jul 2003 19:16:11
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I would conservatively estimate an increase of 10 hp with a 3" downpipe and cat'. If you're worried about sound, put the OEM muffler on the rear - it will be quiet and there will be a marginal loss of hp. Most of the flow losses occur from the downpipe and the cat'. A JT 3" downpipe shouldn't cost you more than $225, and a good 3" cat' can be had for under $90.
The JT is aluminized steel, which I've found to be more than sufficient at resisting corrosion.
It's my preference to avoid stainless on downpipes - stainless tends to be brittle, vis-a-vis aluminized steel, especially on a part that undergoes a lot of heat-cycling. I've had a JT on my 9000 for over two years, it looks the same as new, and I expect to get, at least, another two and a half out of it. A larger, better flowing downpipe and cat' is one of the better modifications one can do to a turbo-charged Saab. Not only will it perceptibly increase the performance, but it will also create better operating conditions for the engine - exhaust gas temperatures will be lowered and the volumetric efficiency, in general, will increase.

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