E-85 vs 92 and meth am I leaving much on the table?
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04-11-2013, 12:25 PM
#11
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If you can live with the cons of e85 then the pro's to it are outstanding. However with that said you'll need more injector and possibly better pumps depending on what you have and your goals. I maxed out 95lbers on e85 at only 15psi. Will be upping to 1600 or 2000's along with better pumps and shoot for 20psi.
04-11-2013, 01:00 PM
#12
I've only seen one back to back comparison and that was from a magazine. I take what that print with a grain of salt. They had a roots on a 5.3 and it picked up close to 100ft/lbs below peak torque and 60 plus horsepower for the entire pull over pump gas. I would like to see a back to back. Pump gas to E85 comparison. I'm currently running 91 octane with 50/50 water/meth at 14lbs of boost and my car made the most power with 15* of timing. I see E85 guys running more than that at 20lbs not to mention it gives you a much broader tuning window.
04-11-2013, 01:39 PM
#13
with 100% meth you can run alot more timing. Most times your adding timing to get the power back up with a higher octain rated fuel.
My car makes just under 1000 to the tire through a T400 and yesterday ran 8.4 at 166mph with alot left on the table. That is 93 octain and meth.
My car makes just under 1000 to the tire through a T400 and yesterday ran 8.4 at 166mph with alot left on the table. That is 93 octain and meth.
04-11-2013, 05:03 PM
#17
with 100% meth you can run alot more timing. Most times your adding timing to get the power back up with a higher octain rated fuel.
My car makes just under 1000 to the tire through a T400 and yesterday ran 8.4 at 166mph with alot left on the table. That is 93 octain and meth.
My car makes just under 1000 to the tire through a T400 and yesterday ran 8.4 at 166mph with alot left on the table. That is 93 octain and meth.
04-11-2013, 07:09 PM
#19
I personally run Twin 14gph nozzles, with 100% meth it changed my AFR by 2 full points. I run a 50/50 mix now for my twin screw.
E85 is around 104-105 octane and to be honest 93/meth would have a higher octane rating and be better at cooling (mainly in part b/c of meth). Another thing about E85 on older PCMs prior to the Gen IV OS's that have flex fuel built in is you can only command 1 type of stoich ratio. E85 blends change throughout the year and even pump to pump, in the winter it usually is less ethanol and its around E70. Unless you tune your own vehicle fueling calcuations won't be 100% correct all the time.
E85 is around 104-105 octane and to be honest 93/meth would have a higher octane rating and be better at cooling (mainly in part b/c of meth). Another thing about E85 on older PCMs prior to the Gen IV OS's that have flex fuel built in is you can only command 1 type of stoich ratio. E85 blends change throughout the year and even pump to pump, in the winter it usually is less ethanol and its around E70. Unless you tune your own vehicle fueling calcuations won't be 100% correct all the time.
