4g63 1g Head Flow Results

[wird06DSM]

Well I did a Mild port job on my 1g head then flowed it with 28 in/mercury. I have only done one cyl. just to see my gains and i have not polished it yet, there are with rough cuts , but a good polishing after the rough cuts might gain me about 1-2cfm Here are my results: ( all in cfm)

Intake
.100 .200 .300 .400 .500
85.7 155.9 213.0 242.4 270.8

Exhaust
.100 .200 .300 .400 .500
41.6 78.9 120.8 214.6 217.8


97% of intake flow at .300 lift The exhaust has no porting done to it yet. more work soon to come

 

[habitatguy187]

Can you explain your measurements? I understand the flow but I don't understand what exactly it is you're measuring.

 

[wird06DSM]

Those are measurments of how far the valve is off the seat.

 

[Hubbell91Tsi]

shouldnt have posted the stock readings and then ported readings.

 

[wird06DSM]

Yea I got the before specs somewhere... but you all the 1g heads flow really close when measured at 28in's.