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20v cylinder head flow numbers
Posted: Mon Mar 05, 2018 10:51 am
by dustin4kq
Has anyone had a 20v turbo head flowed or have the numbers from someone who did? I have a head I played with but don’t want to pay to have a stock head flowed.
Re: 20v cylinder head flow numbers
Posted: Mon Mar 05, 2018 11:46 pm
by PRY4SNO
Talk to our resident warhorses: Taco or Jim or Marc.
Re: 20v cylinder head flow numbers
Posted: Tue Mar 06, 2018 12:19 pm
by audifreakjim
Whew, I thought Javad had done it on MG, but all I can find are 20v numbers. You might dig through audifans.com
Re: 20v cylinder head flow numbers
Posted: Tue Mar 06, 2018 12:32 pm
by audifreakjim
This is all I could find
He found that on an already "mildly" ported 1,800 cc, 8 valve VW head I
THINK (if I got any of the numbers right) that:
Valve Exhaust Exhaust
Lift in ? As Is / Was After P&P
FlowBefore FlowAfter
.01 of lift 71 cfm 88 cfm
.02 of lift 118 cfm 160 cfm
.03 of lift 134 cfm 184 cfm
.04 of lift 139 cfm 186 cfm
Re: 20v cylinder head flow numbers
Posted: Tue Mar 06, 2018 1:13 pm
by vt10vt
Those are surprisingly decent numbers post porting.