5.3 w/317 heads E85?
not to bring this thread back from the dead, but what if you decided to run with untouched 317 heads? What would the advantages be? I ask because I'm a bit on the fence about e85 vs 91 and meth for kill. Despite E85 allowing more compession (w/ milled heads), will it also allow for more boost/timing on the existing 5.3 317 combo?
if you plan on running E85 i dont like any LESS than 10:1 compression. On a small bore 5.3 there is no way in hell i would lower the compression, with a bore size the 5.3 has i would like to be closer to 11:1. In this instance at 11:1 it would be pretty much identical to a 9-9.5:1 engine on pump gas, but with a little more cushion. Just my opinion.
I'm not sure why the 317's would be used, just use the stock heads and a bigger turbo, I'm running the aluminum 5.3 with the stock heads so a little more compression with a TC78 and made 686rwhp on 18lbs on e85.
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Skinnies- I hear you man, but I only have a 5.3 short block, and 317 heads. I'd LOVE to run a set of 243 heads, but I figure I'd just up the boost. Now that I think of it, can the 2002 PCM/ECU handle E85?
NicD - Thats whats I was thinking
Thanks all
NicD - Thats whats I was thinking
Thanks all
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not to bring this thread back from the dead, but what if you decided to run with untouched 317 heads? What would the advantages be? I ask because I'm a bit on the fence about e85 vs 91 and meth for kill. Despite E85 allowing more compession (w/ milled heads), will it also allow for more boost/timing on the existing 5.3 317 combo?
and my understanding is that with speed density tuning I can run two fuels on the same tune? Here in Los Angeles, my understanding is that we only have 1 E85 station, so 91 will be used for normal driving
