Z20let Corsa
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| posted on 3/3/09 at 08:59 PM |
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rv8 heads. what to do???
well ive removed the heads off the v8 tonight to renew the head gaskets and i need to send atleast 1 away to get a snapped inlet manifold bolt out.
the question is. while there off do i get both heads ported, polished and skimmed to get slightly higher compression or not?? what sort of gains am i
looking at and how much is the going rate?? ive never had this sort of thing to do before!!!
locost +4 v8 in progress.
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mr henderson
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| posted on 3/3/09 at 09:09 PM |
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There's a book on the RV8 written by David Hardcastle, published by Haynes. It''s very good. You should read it before deciding.
I had a copy years ago when I was involved with TR7V8s. I don't have it anymore I'm afraid.
I'm not sure that doing the heads is cost effective. You should certainly have them checked for flatness though
John
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DanP
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| posted on 4/3/09 at 12:43 AM |
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Be careful with skimming as you can end up with the inlet manifold not fitting until you fit a thicker headgasket (pushing the comp back down!)
Porting and polishing is not cheap, you are probably looking at 300 quid for even stage 1 heads which prob won't even include much porting.
There are some easier and popular improvements you can make like fitting bullet valve guides and waisted stem valves (they have a narrower stem
section so air can flow round more easily)
You could also try a bit of a polish job yourself to clean up the tracts, the company 'standard abrasives' do an excellent
porting/polishing PDF online guide.
HTH
Dan
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wilkingj
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| posted on 4/3/09 at 11:57 AM |
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What to do?... Easy... If you have limitless supply of Cash
Linky
1. The point of a journey is not to arrive.
2. Never take life seriously. Nobody gets out alive anyway.
Best Regards
Geoff
http://www.v8viento.co.uk
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Fred W B
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| posted on 4/3/09 at 07:25 PM |
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quote:
Porting and polishing
quote:
bullet valve guides
 
nrv87
Few more pics in this thread
HERE
Cheers
Fred W B
[Edited on 4/3/09 by Fred W B]
You can do it quickly. You can do it cheap. You can do it right. – Pick any two.
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