Compression Check (Compression Ratio?)

[nm9stheham]

135 PSI is fairly low and in the stock range. If I had to hazard a guess, I'd say somewhere around 8-8.5:1 static, but again, there's no way to tell but measure.

This is an accurate statement; normal for a good tight 318, with the 318 flat top pistons that are around .075 down in the hole, and maybe thin head gaskets or perhaps some mild head milling. DCR's will be in the 7's with that Comp Cam.

Being pleased with the results is good and is the whole point! But it does not quantify anything. I suspect it is not wild tire burner, but that may be good as it won't break loose all over the place with street tires, and probably winds out well once it gets a bit up on the curve.

(The DCR description in post #2 is nonsense. Everyone, please study up!)

 

[AJ/FormS]

I had a few stock teeners that ran real nice at 140psi.
I have a 367that runs gangbusters at 185 with aluminum heads.
The "turd" status starts at around 120, and by 100 it is mondo-turd!
Performance is in the combo, not necessarily just in the engine; but running the Dcr a tic under the edge of detonation, is a really great place to start! But here in N.America,with 91gas(mostly) as the highest readily available gas, you still have to work within its parameters, as the engine moves on up into peak torque, and beyond. So you can't just crank the Scr to the moon and then bleed the pressure down with a very late closing ICA.
IMO, a well thought out combo is built around the heads and cam, to fit the application.Then the Scr is adjusted, to maximize the performance; a high Dcr for off-the-line-grunt, and optimized Scr to stay out of detonation at WOT.They all just gotta get along.
Or you can just play it safe; get a bigger engine, and detune it to the power-level you need.And no you don't need a 440 in a cruiser-A!