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Old 01-09-2019, 10:08 AM   #1
Torquem
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E85 on stock motor

Curious how much the lt4 picks up with flexfuel / tune alone. Anyone know?
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Old 01-09-2019, 10:50 AM   #2
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60-70whp
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Per. times- 10.5 @ 137 w/ 1.8 60ft Full weight on 20's 1200DA
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Old 01-09-2019, 12:09 PM   #3
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I'm not that optimistic...I think on an otherwise stock LT4, you're looking at 30-40 RWHP with a proper tune. The more HP you're making on pump the more the E85 octane is going to help. On 700+ RWHP cars, it can be worth nearly 100 RWHP.'

You cannot run 100% E85 on an otherwise stock LT4 though. You're going to be maxed at 60% or less. This means mixing with pump gas at the station every fill up. Unless you want to spend some big dough on fuel mods like the new Katech/Xtreme DI setup which they were able to run 100% with just the belt driven pump and upgraded injectors, no cam fuel lobe.
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Old 01-09-2019, 12:20 PM   #4
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I have seen it posted here. You can run e85 on stock pulley but you can not run a smaller pulley and full E85 without fuel system mods. Pulley and E50 seems to be pushing the limits.

https://www.camaro6.com/forums/showthread.php?t=514990
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Per. times- 10.5 @ 137 w/ 1.8 60ft Full weight on 20's 1200DA
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