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Corsa Sport » Message Board » Help Zone, Modification and ICE Advice » porting and polishing


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Author porting and polishing
Warren G
Member
Registered: 14th May 06
Location: Kent
User status: Offline
16th Apr 07 at 18:57   View User's Profile U2U Member Reply With Quote
after looking at robin's cylinder head



is it worth taking the whole guide flush??? like ^
Dave A
USER UNDER INVESTIGATION - DO NOT TRADE

Registered: 10th Dec 03
Location: County Durham
User status: Offline
16th Apr 07 at 19:29   View User's Profile U2U Member Reply With Quote
depends how 'mad' you are going with the rest of the engine really.
Warren G
Member
Registered: 14th May 06
Location: Kent
User status: Offline
16th Apr 07 at 19:35   View User's Profile U2U Member Reply With Quote
not mad!

260 kent reprofile cams
dbilas throttle bodies
standard bottom end (APR bolts only)
8000 maybe 8250 rev limit once got trumpets on aftermarket management
http://www.corsasport.co.uk/board/viewthread.php?tid=321168

but will weaken the valve quite abit...................

also how about the exhasut side, where the SAI normaly goes in, is it worth porting all that out?
like so
Dave A
USER UNDER INVESTIGATION - DO NOT TRADE

Registered: 10th Dec 03
Location: County Durham
User status: Offline
16th Apr 07 at 19:38   View User's Profile U2U Member Reply With Quote
both SBD and pro-tech say to make the exhaust port as oval as possible. personally I would leave the valve guide as it is, cant see any major gains in cutting it down personally.

 
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