Billy Posted March 10, 2003 Share Posted March 10, 2003 excuse me if this has been done before but can the exhaust manifold on a jspec tt be polished and ported if so would this give any performance gains i e faster turbo spool up lower egt's Quote Link to comment Share on other sites More sharing options...
dude Posted March 10, 2003 Share Posted March 10, 2003 Have a look here My new hybrids, what do you think? ( 1 2 3 4 ) on this section(technical) John:flame Dev Quote Link to comment Share on other sites More sharing options...
eyefi Posted March 10, 2003 Share Posted March 10, 2003 some folk have done mild porting to help support big hybrids and ive heard of some guy in the states whos done some major porting with the aid of some welding to beef up the weak spots (not the best idea imo). i think small gains r available from mild port, but theres not alot of metal to go at. Quote Link to comment Share on other sites More sharing options...
GavinL Posted March 10, 2003 Share Posted March 10, 2003 I have discussed this with Leon Green at JPS and he says the gains are minimal and that a manifold that had been opened out was beginning to show signs of cracking when x-rayed. Quote Link to comment Share on other sites More sharing options...
Ian C Posted March 10, 2003 Share Posted March 10, 2003 Bugger. Quote Link to comment Share on other sites More sharing options...
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