Quote:
Originally Posted by 94AWDcoupe
here a guy excited about e-85 and high compression. just made 533whp at 20psi on standard 35r. I dont remember ever seeing 9/1 motors do those numbers.
http://www.4g61t.org/forum/viewtopic.php?f=42&t=30736
quote
slowdsm, e85 let you get away with a lot of thing. rhys runs 14:1 on his car with e85. i have heard of 15:1 boosted on e85. 11:1 is actually too conservative. i think 12:1 is actually ideal for the street just in case you have to turn the boost down and run 89-93 octane pump gas until you get more e85. also with 12:1, you don't have to worry to much about clearances between the piston, valves, and spark plug. with a good tuning system, you don't have to run some rediculous boost to make nice horse power. traditional journal bearings and 360 degree bearing turbo are useful again because you not going to kill it because of the lower boost level.
the key to making power is to have an air/fuel mixture that is as dense as possible to create a combustion with the highest potential energy. people like low compression piston so they can have more control over ignition timing and boost to create more power. the draw back to low compression is you have to run more boost to make more power which. boost level above 25psi on a standard bearing will wear out the thrust bearing in the turbo pretty fast. at 30psi and above on a standard bearing turbo, you can expect a turbo rebuild pretty soon. at high boost on a low compression motor, you sill have to run race fuel or a fuel with a high octane value because the air/density is as high as a high compression motor/low boost setup. |
Freaking amazing post Jerry, Thanks man!!!!