20v cylinder head flow numbers

dustin4kq · Post by **dustin4kq** » Mon Mar 05, 2018 10:51 am

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.

PRY4SNO · Post by **PRY4SNO** » Mon Mar 05, 2018 11:46 pm

Talk to our resident warhorses: Taco or Jim or Marc.

audifreakjim · Post by **audifreakjim** » Tue Mar 06, 2018 12:19 pm

Whew, I thought Javad had done it on MG, but all I can find are 20v numbers. You might dig through audifans.com

audifreakjim · Post by **audifreakjim** » Tue Mar 06, 2018 12:32 pm

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

vt10vt · Post by **vt10vt** » Tue Mar 06, 2018 1:13 pm

Those are surprisingly decent numbers post porting.

20v cylinder head flow numbers

20v cylinder head flow numbers

Re: 20v cylinder head flow numbers

Re: 20v cylinder head flow numbers

Re: 20v cylinder head flow numbers

Re: 20v cylinder head flow numbers