E85, Compression ratio, and turbo...

[Speedwagon]

How high of a compression ratio can you use, if you are going to run E85 with a turbo? I'm thinking it can be fairly high, but don't really know.

 

[meatheaded nucklebuster]

heres some random stuff that might help
http://www.popularhotrodding.com/tech/0311_phr_compression_ratio_tech/index.html
http://www.carcraft.com/featuredvehicles/ccrp_0801_1973_dodge_charger/specifications.html
I couldnt find any charts with boost information but E85 is rated at 100 to 105 octane so you can use this and get some boost tables to figure out your detonation point using your compression ratio

 

[tempforce]

e85 = 100-105 octane.
you could run 11-12 to 1 compression, depending on cam selection.
for racing conditions maybe as high as 12.5:1
i've been checking into this for a 4.6L modular v8 build. for a '56' f-100.
so far the 3.9 cummins is the favorite for the truck, due to cost of building the 4.6L engine, and the ability to not need to use engine control computers, with the diesel.
cc