Quote:
Originally posted by neilca
Snowman,
I agree with you on the lift theory. At what lift have you found in your flow testing does the benefit drop off? I am trying to decide how much lift is required.
Thanks,
neilca
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If I remember correctly its about 0.375" lift where it flattens out, pretty dramatically.
This dosen't sound much like a performance engine, unless you see how much the flow is at very low lift, its tremendous! and thats where it counts. The more air you can flow at low lifts adds more to the overall flow, much much more than the very brief peak flow at the highest lifts. For you math types, its the TOTAL area under the curve that counts, not the peak.
The numbers I have measured are as follows:
Stock 911T w 46MM intakes 42MM exhaust
intake
lift flow (cfm at 28" )
0.1 " 60
0.2 " 121
0.3 " 174
0.35" 192
0.40" 200
0.45" 200
exhaust
0.1 " 52
0.2 " 99
0.3 " 129
0.35" 142
0.40" 149