[Indypete]

Originally Posted by KingLT1

You need LT4 fuel system to run E85. At 5psi you can likely run full E85, at the 8-9psi you will be limited to E50- E60 which is all you need to get the benefits of E anyway.

ADM performance has a lot of info on the topic.

https://www.camaro6.com/forums/showthread.php?t=528126
https://www.camaro6.com/forums/showthread.php?t=527512
https://www.camaro6.com/forums/showthread.php?t=475479
https://www.camaro6.com/forums/showthread.php?t=444241

A bit late but this reply rocks, thanks :-) Very helpful!

[G2K]

Yup like everyone has said to run E85 (really E50-60) you will need LT4 fuel system.

I have a 2.75 pulley if you want to bring the boost down to 7-8psi which is what I had it at. Still made 630wheel (remember with LT4 fueling).

My honest opinion save a bit more and get the fueling its totally worth it... 550w with the added blower weight will still make you slower than a few all motor bolt-on cars and definitely slower against cammed 6 gens.

Do that all from the get-go, same some money on retuning and another labor as they all have to be taken out when installing the lt4 blower anyway (except the intank pump).

[sr71bb]

Well. I think the limiting factor on the LT1 using an Lt4 blower assuming you are fueling it correctly is going to be the weaker piston in the LT1. As long as you stay around 650 RWHP or less you PROBABLY will have a relatively long life on the engine. The weaker material of the piston and basically the ring gap setup on the LT1 piston is NOT ideal for higher boost situations.

[oldman]

Originally Posted by wnta1ss

The LT4 has a lower compression ratio, and therefore it needs more boost than an LT1 would to make the same power. So while the base sc kits made for an LT1 motor probably would be in the 6~8psi range, I don't believe that's the case for the factory LT4 pullies. You could try finding out what pullies ADM or Weapon-X use when they put an LT4's blower onto a stock LT1 motor to get the 6-7psi of boost that you wanted.

true dat, and the LT1 used the a cam with a MUCH larger intake duration (where the power is made). The LT1 has the same lobe cam spec as the LT5 (which is a LT1 "manual" or AFM delete cam). The combined effect of higher CR and bigger intake duration (sure it is mostly CR) seems to work very well upto the octane limit of the fuel.

[ADM PERFORMANCE]

lYou need LT4 fuel system to run E85. At 5psi you can likely run full E85, at the 8-9psi you will be limited to E50- E60 which is all you need to get the benefits of E anyway.

ADM performance has a lot of info on the topic.

https://www.camaro6.com/forums/showthread.php?t=528126
https://www.camaro6.com/forums/showthread.php?t=527512
https://www.camaro6.com/forums/showthread.php?t=475479
https://www.camaro6.com/forums/showthread.php?t=444241

And again

You need LT4 fuel system to run E85. At 5psi you can likely run full E85, at the 8-9psi you will be limited to E50- E60 which is all you need to get the benefits of E anyway.

ADM performance has a lot of info on the topic.

https://www.camaro6.com/forums/showthread.php?t=528126
https://www.camaro6.com/forums/showthread.php?t=527512
https://www.camaro6.com/forums/showthread.php?t=475479
https://www.camaro6.com/forums/showthread.php?t=444241

and again

You need LT4 fuel system to run E85. At 5psi you can likely run full E85, at the 8-9psi you will be limited to E50- E60 which is all you need to get the benefits of E anyway.

ADM performance has a lot of info on the topic.

https://www.camaro6.com/forums/showthread.php?t=528126
https://www.camaro6.com/forums/showthread.php?t=527512
https://www.camaro6.com/forums/showthread.php?t=475479
https://www.camaro6.com/forums/showthread.php?t=444241


Maybe a flex fuel sticky should be put up top...Ops

[Indypete]

Thanks again for all your help ADM/Andy. Car is running great! You have another new customer for life!