E85 on stock motor

Torquem · 01-09-2019, 11:08 AM

Curious how much the lt4 picks up with flexfuel / tune alone. Anyone know?

KingLT1 · 01-09-2019, 11:50 AM

60-70whp

Can'tHave2MuchHP · 01-09-2019, 01:09 PM

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.

KingLT1 · 01-09-2019, 01:20 PM

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

01-09-2019, 11:08 AM	#1
Torquem Bannable Drives: 2017 Camaro ZL1 Join Date: Oct 2009 Location: Houston, TX Posts: 460 View My Garage	E85 on stock motor Curious how much the lt4 picks up with flexfuel / tune alone. Anyone know? __________________ One must forego the self to attain total spiritual creaminess, and avoid the chewy chunks of degradation 2017 ZL1 A10 - Hyper Blue Metallic Rotofab CAI, TM ported TB, AWE non res touring catback with PLP's

01-09-2019, 11:50 AM	#2
KingLT1 Drives: 2016 1SS NFG A8 Join Date: Aug 2017 Location: 46804 Posts: 7,560	60-70whp __________________ 2016 NFG SS A8/Whipple 2.9/Fuel System/Flex Fuel

01-09-2019, 01:20 PM	#4
KingLT1 Drives: 2016 1SS NFG A8 Join Date: Aug 2017 Location: 46804 Posts: 7,560	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 __________________ 2016 NFG SS A8/Whipple 2.9/Fuel System/Flex Fuel

01-09-2019, 01:09 PM	#3
Can'tHave2MuchHP Drives: Fast Join Date: Mar 2015 Location: Michigan Posts: 3,696	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.

User Name		Remember Me?
Password