Hi comp pistons

canes7

Please elaborate.

Chuck33079

My guess would be that the static compression ratio is the same whether the car is idling at 750 rpm or at redline.

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canes7

All the articles I can find quickly focus specifically on how efficiency is increased by upping the CR. I was referring to CR's effect on the torque curve. If I find something I'll post it.

synolimit

I'm no expert but compression is power, it has nothing to do with rpm. If you cram air and fuel into a space and ignite it, it goes boom. If you cram the same amount into a smaller space (more compression) you get a bigger boom. The more faster bigger booms you get from 2-7k, the more power you make. Hp is basically just a guess calculation from how fast you can get a drum to spin from beginning to end in xxx amount of time. TQ obviously is a measure of the force on that drum.

Now with degreeing the cams, cam tuning/timing, ignition maps etc, you can put the added power where you kinda want it. My race bike for example made about 12 hp from a thinner head gasket. That power started in the mid range from 6-10k. But since you're never really that low, we degreed the cams and moved it above 10k where it was needed more.

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13 370z-