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Tune can and will make a huge difference. Sounds crazy, but you may have upwards of 100 horsepower hiding in there. Proper curve, plugs, jetting and small bolt ons like a carb spacer go a long long way

The bowls on most BB heads are a mess. Open and blend the bowls and you'll see a real improvement.

Check the float level. One or both too low could be uncovering the primary jet on launch. Once the initial launch has passed, the fuel will flow forward and the car will pick back up.

Don't thank me, let's just get it done!

Somehow that all looks familiar.....

Greg, GREAT post man!

I remember reading somewhere that compression was worth approx. 4% HP gain per point. I'm thinking that was either Smokey or Da Grump with that number.

You're missing the entire point of this exercize. The point is to show what can be done with a STOCK LOW COMPRESSION shortblock, and the most basic of bolt ons. If you want to see what can be done with a modern shortblock, just Google the zillion stories done by all of the various magazines...

I tend to agree with you, but there is only one way to actually find out. Remember, this engine is handicapped with static compression, not dynamic. What happens when you play into the dynamic part of the equation? That's what those cams are supposed to be doing.

I agree with what you're saying exactly. My curiosity has nothing to do with sound, but rather how a cam ground specifically to build low end cylinder pressure would compare across the board with a more traditional grind like the .509. I'd also be curious to see how that .509 would react with...

GREAT thread, and thanks for sharing! Couple of questions. You never mentioned the head gasket thickness and whether or not the 516's were big or small ex. valve. Also, the test was done with a .509..was it installed straight up, or advanced. Also, what of low comp. specific grinds, like the...