Compression Ratio per Camshaft Size

273 said

If you take out the fuels ability to handle it, should be able to run every cam at say very low cr of 7:1 just gonna have the least possible power curve unless you go with even less cr. And each bump up in cr is just gonna add power across the entire powerband, rule of thumb is like 3% per point all the way say to race cr 14-17:1 cr.

Question is how much cr can you run on the gas your willing to run for a given combo, or could be what's the least cr your willing to run for a given combo or somewhere in between. Like PRH said it depends.

Unless you know "YOU" not just cause some others can/able get away with say 10-12 cr on the street wth a given combo, I'd be cautious last thing is you want is a pinging mess of an engine.

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Lots of truth to this. Not totally on board with the rule of thumb for percentages of power gain per point of compression though. It’s a variable thing.

The quality of the stations fuel can vary even by the same brand. I stand by my statement above. Runs and drives fine. It’s been about 5 years now.

Aluminum heads seem to be really good for what most think will be to much compression and a small cam. Which just have me saying thanks to those that told me not to worry and just go for it.

The above combo has 18*’s initial. The rest is have to look up.
It handles W.O.T. Hot or cold here in Florida. Before anyone cracks cold jokes about Florida, it has gotten to 28*F where I’m at during the night. Thanks heavens it doesn’t last!