E85

[Hib Halverson]

Originally Posted by XfireZ51

For those of us that have been following the C7 saga, there's been lots of chatter over the use of E85. Some have shown dynos +40whp with a tune.
For the most part it sounds like using E85 is a matter of tuning for E85. Not much else required at least when it comes to C6. More timing, more compression w no knock. The LT5 is not timing limited, you just lose power.
Any thoughts?

If you could solve the problem of adequate fuel delivery---E85 runs at a lower AFR than straight gasoline---the next biggest problem you'd have with E85 is all the fuel system parts which corrode. Some of a C4 Corvette's fuel supply system will be damaged or destroyed by E85.

That said, the reason some folks are interested in E85 is that it allows a significant increase in compression ratio because of its approx. 105-octane. That also could allow more spark timing, but typically, an LT5s spark cal is close to optimum already.

I would think an LT5 with stock CR wouldn't have much to gain with it, but an engine with 13:1 or so would.