Comp ratio suggestions please
#1
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Hi guys
currently rebuilding my engine and need to send the pistons off for cut outs and possibly ratio change. my previous set up was running 7.5-1, but this was with C.P pistons, i'll now be running 4x4 Mahles.
spec will be..
200 block
2wd head with normal headgasket
standard rods
Mahle 4x4 pistons with cut outs
BD14
T38 around 30psi
Wondering if 7.5-1 is too low really? i have a feeling i once read that 4x4 pistons and 2wd head drops the ratio to 7.8-1 anyway? so if thats the case i guess i just go for pockets and leave ratio as it is.
Cheers
currently rebuilding my engine and need to send the pistons off for cut outs and possibly ratio change. my previous set up was running 7.5-1, but this was with C.P pistons, i'll now be running 4x4 Mahles.
spec will be..
200 block
2wd head with normal headgasket
standard rods
Mahle 4x4 pistons with cut outs
BD14
T38 around 30psi
Wondering if 7.5-1 is too low really? i have a feeling i once read that 4x4 pistons and 2wd head drops the ratio to 7.8-1 anyway? so if thats the case i guess i just go for pockets and leave ratio as it is.
Cheers
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Last edited by ram; 30-01-2013 at 12:05 PM.
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