410 supercharged

Mad Dart said
Would he loose the quench on the engine by adding a thicker head gasket? To drop 3/4 of a point on compression the gasket would need to be pretty thick no? How about having the heads worked on to increase the CC which will lower the compression?

I had a 9.5:1 Supercharged engine before with 10lbs of boost and for some reason I could not get it to stop detonating unless I pulled a ton of timing out of it. It also beat the Rod Bearings out of it more than once. It built so much crankcase pressure also that it spit all the gaskets out of it. I even POPPED Cometic gaskets. It was a different engine, different build at that.

He would loose some quench, but it probably doesn't have any to begin with. People make a big deal out of quench, which when an engine truly has an effective quench it is a big deal, most engines dont experience true quench. Working over the chambers is a great way of doing it, and you can pick up some head flow from unshrouding the valves. I just figured he had a running engine and didn't want to go thru all the expense and trouble to send the heads out. I assumed and you know what happens when I assume.

I am not familiar with the setup you had there Mad. There are a lot of factors that go into why a car detonates or how to keep it from doing it. Factors include: Compression ratio, cylinder head chamber design, sharp edges on the pistons (piston design), Valve design, camshaft overlap, cubic inch, Rpm range it operates, type of supercharger, type and size of intercooler, ambient air temp and humidity, induction set up (carb versus EFI), weight of the car, tires (does it hook up enough to load the motor at low speeds), torque converter, gear ratio. I know I am leaving some things out but its just to give you an idea that ther is more to it than compression ratio.