Subject	Re: Supertech 0.5mm vs Ferrea 1mm oversize valves?
Posted by	BLACKBEAST on April 16, 2013 at 12:51 AM
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In Reply To	Supertech 0.5mm vs Ferrea 1mm oversize valves? posted by KongZTT GT28RS MD on April 14, 2013 at 07:02 AM
Message	the stock chamber is too shrouded to benefit from the 1mm OS valves .. (low lift suffers) With 88mm pistons you can do a half decent job of deshouding them as you can open the chamber a little more . I would run .5mm unless you do what I did and run 89mm pistons and match port the chambers to 89mm. But you will need custom pistons to bring the compression back up to where you want it .
Follow Ups	Supertech 0.5mm vs Ferrea 1mm oversize valves? - KongZTT GT28RS MD 07:02:29 04/14/13 not much to be gained from that 1 isolated valve mod. - samsung-Z [Houston] 08:17:11 04/14/13 getting a full valve job anyway.. Which is why I am asking.. - KongZTT GT28RS MD 08:51:17 04/14/13 Also need to purchas new oem intake valves at a minimum. - KongZTT GT28RS MD 12:27:30 04/14/13 why do they say the valves are soft? where they are actually - toykoz32 15:45:01 04/14/13 haha.. I guess because they look soft when they are worn (n/m) - KongZTT GT28RS MD 18:38:10 04/14/13 Also need to purchas new oem intake valves at a minimum. - KongZTT GT28RS MD 13:12:17 04/14/13 Come on .. nobody else? (n/m) - KongZTT GT28RS MD 20:13:38 04/14/13 I remember greg saying something about the shrouding effect. - michaell32 (FL) 20:27:10 04/14/13 they flow about the same - aliaZ 00:09:37 04/15/13 In that case you're def better off w the smaller one - ZXoltan 07:04:46 04/15/13 Mike Smith recommended the .5 over the 1mm. - Woody75 (Denver) 10:51:28 04/15/13 Re: Supertech 0.5mm vs Ferrea 1mm oversize valves? - BLACKBEAST 00:51:56 04/16/13 I am running 88mm pistons. Stock compression - KongZTT GT28RS MD 08:50:26 04/16/13
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