5.9, max safe compression?

RustyRatRod said
Oh my GAWD

And I was thinking more like SHEEEEEEEEET

nm9stheham said
This calculator is TERRIBLY misleading as to how overall engine performance is effected with CR, and I wish people would stop pointing to this, as they are doing a great disservice to new engine builders. This ONLY reflects the PEAK HP under certain LIMITED circumstances. It tells you NOTHING about how much added CR effects low RPM torque, widens the torque band at the low end, and improves engine efficiency.

If we did not care about this, we would also never change cam timing to make changes in peak combustion compression numbers.... etc. And we all KNOW that running too big a cam in a low SCR engine kills the low RPM torque. So why then turn around and say that CR is not important? Pure nonsense.

If CR was not important, we would all run 6:1 SCR and never worry about detonation. Let see some dyno curves from that....

Anyway, I was also thinking maybe jack the compression ratio up to 12.5:1 and back the timing down to 12 degrees total. Because everyone knows that a 9.5:1 compression, let alone an 8.2:1 compression 360 engine, will never be able to get out of it's own way.

Let's put a mild 8.2:1 360 on the dyno.

I don't have a dyno curve from a 6:1 compression engine but I do have one from the 8.2:1 engine.

Don't be safe. Squeeze every bit of compression you can out of that engine and fight with it until you are completely sick of it. Then give it away and build something you can live with. Or quit the hobby altogether because it is soaking up all your money trying to get the POS to work.