gwcrim
Junior Member
- Joined
- Nov 18, 2014
- Posts
- 20
- Reaction score
- 0
- Location
- Ohio
- First Name
- George
- Truck Year
- 1980
- Truck Model
- C10
- Engine Size
- 400
I'm building a 400 from a short block I bought from my neighbor. He claims it has very low mileage (less than 1000 miles) and I have no reason to doubt him. It's got 20 over Keith Black flat tops. Piston depth varies from 0.043-0.057. It's a pretty big variance but not my main issue.
I've been looking at Promaxx heads. Promaxx is the reorganized Patriot. They offer a head with 72cc chambers. If you run the numbers with a 0.04 head gasket you get about 9.5:1 compression. That's perfect for my needs.
My concern is that there will be a total quench height of 0.083-0.097. That's excessive. If I run a cam that keeps dynamic compression at a reasonable level, will that much quench cause pinging?
Any other concerns?
This is going to be a street engine, not to be run on the ragged edge.
I've been looking at Promaxx heads. Promaxx is the reorganized Patriot. They offer a head with 72cc chambers. If you run the numbers with a 0.04 head gasket you get about 9.5:1 compression. That's perfect for my needs.
My concern is that there will be a total quench height of 0.083-0.097. That's excessive. If I run a cam that keeps dynamic compression at a reasonable level, will that much quench cause pinging?
Any other concerns?
This is going to be a street engine, not to be run on the ragged edge.