Headers question
#1
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Headers question
Hoping to hit the 400bhp fig with supporting mods and question I have is, should I go with ported heads and a Harvey up-pipe or RCM and a Harvey pipe.
2002 STi
Thanks.
2002 STi
Thanks.
Last edited by techdw; 15 April 2015 at 07:38 PM.
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ive just ported my own and fitted a harvey pipe , having the map tweaked tomorrow . if your confident its not that difficult tbh . you can defo feel the difference i'll see what the tweak brings tomorrow .
#8
What are we porting here? I looked t mine when they were off and the head/manifolds are same size and quite well matched already. Both are smaller than the gasket, but then there's no point in opening up the manifold if the heads still small, would that not just slow down gas flow? I'm not saying what you have done doesn't work, I'm just curious what you have done to make a difference? Cheers
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What are we porting here? I looked t mine when they were off and the head/manifolds are same size and quite well matched already. Both are smaller than the gasket, but then there's no point in opening up the manifold if the heads still small, would that not just slow down gas flow? I'm not saying what you have done doesn't work, I'm just curious what you have done to make a difference? Cheers
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