Compression ratio and cam Selection?
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Compression ratio and cam Selection?
I was reading an article about cam selection and compression and they strees that it is very important that you get the right cam vs. compression ratio.. is this true? I will be running XR270HR cam with stock pistons... do I need to invest in better pistons now?
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Joined: Jan 2002
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From: Valley of the Sun
Car: 82 Z28
Engine: Al LT1 headed LG4 305
Transmission: TH350
Axle/Gears: 3.73 posi with spacer
Yes it is very important! You want to try and shoot for a Dynamic Compression Ratio (DCR) of about 8.0:1. I don't know what "stock pistons" means, what engine, size, etc?
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From: Philly, PA
It's not THAT exacting a match. You just don't want to be running a big lumpy cam with an 8:1 compression ratio or anything like that.
At a stock CR of roughly 9.5:1 that cam should work just fine.
At a stock CR of roughly 9.5:1 that cam should work just fine.
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