cranking compression vs E85 vs Methanol

[spankyracing]

This is my first time to this site. I run a methanol injected 410 SBF Clevor, 3055 lb with driver 10 inch slicks 5.95 at 114.18 is my best pass on methanol. my motor has 245 lbs cranking compression, cam is 775-757 266-273 @.050 108 sep 104 c/l intake 112 ex but installed 107/109. I shift the car at 6500 rpm
stall is 5000. 4.30 gear, 28 x 10 x 15 slicks , caltracs set up.

So how much cranking compression will e-85 support?
which in turn means how much compression all together?

is there a et difference between E85 and straight methanol?

I run injected Ron's toilets 1435 cfm each on a sheet metal intake made for my CHI 3v heads 218 cc runners.
I leave off idle 1.32 60 ft's no brake, I have a brake but have never used it.

I did find the car runs best at 180 degree stagging line temp
anything colder and the car will be slower

how motor nozzle size and return pill size differ between the two fuels? E85 vs methanol?

how about detonation?


Mike S -Texas

[Heath Daniel]

Mike welcome to the board. I know a guy playing around with a Ron's injection on E85 right now but I don't have any hard numbers for you as of yet. It will work, I can tell you that for sure. I am currently building a blown injected sbc and you bet I'll be running in on E85 next year. It's set up for meth now and I'm just going to back down on the nozzles and increase the pill for starters and tune off the EGT from there. I feel as though I can get it to run as good as on meth without all the milky oil and maintenance. Thanks for your interest and stay tuned because I will post some hard numbers when I have them. I have seen E85 support 15.5:1 static compression on a BBC if that helps answer any of your questions.

[Gerchmanjr22]

245 psi? Your pumping losses are getting up there. that is also very hard on parts. With that caliber of motor, you are losing airflow becuase of all the meth. Do you run down nozzles? You acctually may make more power with e-85 due to there being less saturation and turbulence in the tract. would be an interesting test.

[Heath Daniel]

Great observation Gerchmanjr22. Of course Mike would have to re-tune when he tried the E85 to get a true 1 to 1 comparison but I too would love to see the numbers from a test like this.