I have had a search and not come up with much, but does anyone know what they did to the BTCC style inlet manifolds? I know the throttle bodies where enlarged with a different butterfly size.

Im sure i saw somewhere that they machined the trumpets out flush with the plenum but im not sure. This shortening the intact tract, presumably for more revs? On a reasonably standard engine would this work, or do you think it might be worth lengthening the intake tract, if anything atall?

On that theory, the PTFE inlet manifold gaskets, how much thicker than standard are they if atall?, if thicker, would this lengthening of the intact tract also be helping power?

i also found through google a 406 btcc manifold that had carbon trumpets on it, for single throttle body type. quite trick.

Any ideas/theories, cheers!

Indeed it is, hence the first sentence of my post, but if you can point me at something i havnt allready found on this site regarding them i would be greatfull. Ive spent some time looking and havnt found anything substantial, thanks

I think a ban is a little ott to be honest, i will be straight though, i didnt search for modified inlet manifold, pretty much everything but, cheers for putting me in the right direction, if that all i need to know the post can be closed if required.

I was told that on a race spec head running big valves and high RPM my manifold would increase power, you would also need a high flow exhaust system (Maniflow or similar) I still have the manifold and it was nicely made but would'nt reach it's full potential on an otherwise standard engine. If you have plans to go to town on the head etc. the manifold is still available to buy as I never sold it after my try at it.

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i wondered if the biger inlet ptfe gasket would make any difference with it increasing the inlet tratc.

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andrew315rawson@live.co.uk
Moonstone phase 7 gti6
My Project thread: http://www.306gti6.com/forum/showthread.php?id=119992&page=1

5mm, slight alteration, but not a lot.

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Don't think you can make it much longer without doing something with the rad. They're pretty close as it is

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My old man wrote me a letter from prison once. It said if you don't want to end up in here, stay away from crime, women and drugs. Trouble is, that don't leave you much else to do, does it?

Best thing you can do is move to lighter 7" wide 15" wheels with light tyres (PE2). My wheels + tyres weigh around 13.5 kgs each, versus the standard at about 18 kgs.

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