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Jay 964rs Rep

Joined: 03 Jul 2007
Posts: 47
Location: Swindon, Wiltshire

PostPosted: Mon Jul 30, 2007 6:19 pm    Post subject: Reply with quote

madmoog wrote:
A hot film sounds interesting........

Just don't tell the good lady Wink
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Watkins Glen

Joined: 28 Jan 2007
Posts: 2232
Location: Part of the NorthWest Crew

1990 Porsche 964 Carrera 2

PostPosted: Mon Nov 12, 2007 11:06 am    Post subject: Reply with quote

Here's a schematic of the standard 964 exhaust system:

Moving to 964 FAQs. Please continue to add your experiences of exhaust upgrades.

Racing Yellow Cayman GT4

History of my now gone 964
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Joined: 25 Apr 2008
Posts: 11

PostPosted: Fri May 02, 2008 6:03 pm    Post subject: Reply with quote

I have a cat bypass and Hayward & Scott stainless backbox in place of the rear silencer / A corn side silencer as fitted to standard car.

Got pulled by Police last year - they were working under Council ASBO initiative against environmental noise. Unlucky for me! I kept polite and drove off... Car without either silencer, i.e. with G pipe AND cup pipe fitted, will sound awesome but you will not get into track days and will possibly attract the wrong attention from neighbours and police...

As for hot film, I seem to recall Ninemeister were of the opinion that the main limiting factors to stock 964 was the throttle body and injectors - without changing these plus 300bhp is nigh on impossible.

Mine has had remap by 9m to give 280bhp. I also did comparative rolling road tests (on single roller - supposed to be more accurate) between K&N style cone filter from evo motorsports in US and K&N panel in standard drilled airbox. Standard airbox gave +3bhp, but minus 3lbft torque peak.

I also seem to recall from somewhere that the later cars (and RS) plastic intake manifold is better for those seeking ultimate power....
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Joined: 24 May 2007
Posts: 1329

PostPosted: Fri May 02, 2008 8:49 pm    Post subject: Reply with quote

I have a cat bypass, K&N panel in drilled box, ruf chip and did a 277 run on the dyno...

the rest of the exhaust is standard, so it cant be THAT restrictive.
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