Quote:
Originally Posted by Gach
That is one of the smarts moves I've seen in after market head design. Lynn do you
have a ball park price for bare heads and intake, intake for Dominator ?
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Thanks Gach, $2500 for bare head castings. The heads without water jackets will be about $500 more. It is usually $500-$700 for complete heads fully assembled, but not with special valves like a RA-V. Tunnel Ram intake will be under $1000 with the availability of either a 4 barrel or 2X4 barrel top and the ability to mill down plenum size. We will let you know what prices we get. I am trying to keep
After running SS and a Tunnel Port for lots of years and seeing them over hundreds of dyno pulls, valve train is the most misunderstood limitation on Pontiac motors. We got 7500 RPM out of my 455SD with 188 cc intake runners. A big part of that is valve train. We used to think the heads quit flowing at 6200. Not true, it was valve spring limitations due to valve bounce. My opinion we do it in this order:
1.) install lightest valve train weight possible
2.) use soft style seats as hardened seats exacerbates valve bounce as do stainless valves.
3.) run as much valve spring as you need to make power. Cheap valve springs on a Pontiac do not cut it.
Lynn