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Search took 0.00 seconds. Search: Posts Made By: Skip Fix
Forum: Pontiac - Street 03-26-2023, 02:24 PM
Replies: 28
Views: 2,688
Posted By Skip Fix
Since Pontiac had different chambers for 670...

Since Pontiac had different chambers for 670 heads, 68-78(79 400s were cast in 78) D port heads, RAII, RAIV/HO/SD round port heads and RAV were different I would bet swirl is totally different in...
Forum: Pontiac - Street 03-26-2023, 10:52 AM
Replies: 28
Views: 2,688
Posted By Skip Fix
On mine a pretty basic valve job I think will...

On mine a pretty basic valve job I think will improve it. I think some work on the short turn also. I think for $1500 they were hard to beat for an average street/strip motor.

As far as intake...
Forum: Pontiac - Street 03-25-2023, 12:43 PM
Replies: 28
Views: 2,688
Posted By Skip Fix
Here are the CNC numbers- better but different...

Here are the CNC numbers- better but different Superflow benches.
0.200 Intake 139, Exhaust 115 , 83%

0.300 Intake 209 Exhaust 162, 77%

0.400 Intake 269 Exhaust 190, 70%

0.500 Intake...
Showing results 1 to 3 of 3

 
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