Quench

rumblefish360 said

Dare Devil, the head didn't get any closer to the piston, but more so the valve when opening.

Brambles, it's the combo you have and in a heavy truck. Thats why it pings. Where and how is the distributor set up?

Whats a small Comp Cam?

On the head, unless you went overboard of the exhaust port, you'll be OK. It's not as much of a problem as you may thik since the exhaust port is the biggest resticktion and is the port that needs the most improvment to reasch a better balance in the heads.

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The cam is a XE250H 206/212 @.050
As far as timing, its been a few years since I've toyed with the timing, I parked the truck and start it regularly but I've forgotten those details. IIRC the total timing is backed down to about 30 or 32 degrees but the advance might still be coming in a little quick for the heavy truck.

I'm not going to fool with it in the truck, the engine is coming out and going in my Dart after a few modifications.

The heads are magnum heads and the exhaust flows at a good percentage out of the box, opening them up even more and running a cam with more duration on the exhaust than intake isn't going to help matters much.

I think with my new cam I"m going to try a single pattern cam.