Compression ratio and octane
#1
Compression ratio and octane
I'm seriously considering putting 243 heads on my 6.0 turning it into an iron LS2. Should be around 11:1 compression. The only reason I haven't done this so far is that in the summer's I tow and go camping out in the boonines - no good gas. I was thinking to have a pcm with a 93 tune and then have another one I can swap in to run 87 on the occasions that I go camping. Will the motor be okay on 87 with lowered timing? I know it will be down on power, but I dont care. I've read that the TBSS runs just fine on 87. Thanks!
#3
On The Tree
low octane fuel and high compression = knock, ping, detonation, power loss, and less efficiency...
Instead of having 2 PCMs, you'd be better off just putting 87 in it if you had to(with the 93 tune). The detonation/knock created by the lower octane fuel will cause the PCM to retard timing, which will roll it into the low octane tables anyway.....
Instead of having 2 PCMs, you'd be better off just putting 87 in it if you had to(with the 93 tune). The detonation/knock created by the lower octane fuel will cause the PCM to retard timing, which will roll it into the low octane tables anyway.....
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