Originally posted by frankg
From what i've read this is what i remember them flowing:
GN1's- 220-225 cfm intake
CNC Irons-200-205 cfm intake Frank
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Our numbers are very close to Frank's. We have flowed a few sets on GN-1's and lots of maxed iron heads. With the same flow bench and operator, here is what we got:
All on intake at 0.500" lift:
stock max port, 1.77" valve iron.........210 cfm
GN-1 out of box..................................230 cfm
GN-1 Champion ported.......................257 cfm
GN-1 ported by us..............................260 cfm
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Nick Micale
Searched using 'flow numbers' keyword.
The msd 50's will get you there with great street manners.
I've forgotten the flow numbers for stock heads are. 170 ish?