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Discussion Starter #1
I recently put a set of ported NPI's on the Cat and I thought I would post the numbers for them if anyone is interested.

Before: .100" .200" .300" .400" .500" .600"

Intake: 51.6 (CFM) 91.2 118.5 143.6 168.0 176.8
Exhaust: 44.6 85.5 121.0 131.1 136.1 138.3

After:
Intake: 56.6 96.0 130.3 163.8 190.8 203.2
Exhaust: 54.1 94.9 139.9 151.5 156.3 158.1

These heads are loaded with PI cams and topped with a PI intake. The heads were also portmatched to the intake as well. This was a local shop (Sioux City, IA) that does very good work.

Total cost of standard 3 angle vavlve job, pro street port, and port match was $859.85.

If anyone is interested in having them port some heads, let me know and I can give you some contact info.

I have yet to get the car on the rollers to see what it is putting down, but I will post that as soon as I get it done.

Joe
 

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Discussion Starter #3
I am not sure on the exact numbers on a per lift basis, they may have some numbers somewhere. Maybe someone will have the numbers.

Joe
 

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