HOW TO DO AN ADVANCED SEARCH.

Mon Jul 08, 2013 3:56 pm by Admin


For the benefit of 944Hybrids users there are two search functions available for you to use.
The purpose of this sticky is to explain the "Advanced Search" function because it is much more powerful and is the best choice when researching information.

When you log on to the site a list of options is shown in a line at the top of the page. One option is labelled "Search", use this option (NOT the search box lower down on the right).

After you click on the upper search option, a drop down box appears. At the bottom of this box is a radio button marked "Advanced …

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exhaust size

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exhaust size

Post  948inVA on Mon Jan 16, 2012 8:32 am

Is there anything wrong with running 3" back from the headers? I have my stainless cat-back that I made for the turbo setup, was thinking about just keeping it for now to save some time since I would only have to add in a y-pipe to get it running.
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Re: exhaust size

Post  Arthropraxis on Mon Jan 16, 2012 2:44 pm

Where is that open can of worms emoticon? There have been lots of different opinions about this topic. A single three inch is good for 370 engine HP without any loss. If you are planning more HP than that you will neeed a bigger exhaust.

A 2.75” (stock) single system is good for a 310hp engine with zero loss…
A 3” Single system is good for a 370hp engine with zero loss…
A 3.5” Single system is good for a 503hp engine with zero loss…
A 4” Single system is good for a 657hp engine with zero loss…
A 2.25” dual system is good for a 457hp engine with zero loss…
A 2.5” dual system is for a 513hp engine with zero loss…
A 3” dual system is good for a 812hp engine with zero loss…

I got that from [You must be registered and logged in to see this link.]
Not sure where he got it from.
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Re: exhaust size

Post  948inVA on Mon Jan 16, 2012 5:05 pm

Thanks for the info.. I guess I will just keep what I have for now.
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Re: exhaust size

Post  Rich L. on Mon Jan 16, 2012 6:11 pm

I'm gonna do the same thing, y into my existing 3" exhaust. I'm even gonna stick a high flow cat in it. I figure it'll cost me some power but it'll get the car running and it won't stink or make cop attracting balls of flame.

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Re: exhaust size

Post  944-LT1 on Mon Jan 16, 2012 11:17 pm

Thats pretty much what I had with my LT engine. 2.5" off the headers into a 3". With the LS3 engine, I have 3" collectors into dual 2.5".

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Re: exhaust size

Post  Rich L. on Wed Jan 18, 2012 1:46 pm

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There's where I'm at. Ignore the black square tubing, that's the lift. The engine is installed without crossmember spacers so I have some body interference to deal with. The 3" exhaust has a resonator in the center and a Magnaflow muffler in the back. It was ridiculously loud with the 4 cylinder so the cat idea is also to quiet things down a bit. But maybe I'll just try it with the v8 and see. Twisted Evil

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Re: exhaust size

Post  Arthropraxis on Wed Jan 18, 2012 4:34 pm

Nice headers. I am planning to go without cats to a 2.5 into a 3 inch merge and out with a 4inch round body 14 inch long magnaflow in the I-section and either a 14 or 18 inch body offset in/center out magnaflow muffler out back. With both mufflers being 3in in and out. I think it will be a comfortable sound level, I hope so.
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Re: exhaust size

Post  948inVA on Wed Jan 18, 2012 6:07 pm

Rich, that's not a bad idea with the cat. I did the same thing with mine, have a 5" bullet muffler where the cat used to be but the back of my car is always filthy from the soot.
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Re: exhaust size

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