Difference

pure_evo · May 2, 2009, 01:17 PM

What is the octane rating difference between Q16 and E-85? Thanks.

D420mac · May 2, 2009, 01:20 PM

I could be wrong but I think it's 11 octane different

pure_evo · May 2, 2009, 01:29 PM

Quote:

Originally Posted by D420mac

I could be wrong but I think it's 11 octane different

OK. We can use this as the baseline. Assuming that all things are the exact same and the only thing changed was fuel, what would be the approximate whp/wtq difference? A round about figure works for me just to be safe.

Jim in Tucson · May 2, 2009, 04:00 PM

Quote:

Originally Posted by pure_evo

Assuming that all things are the exact same and the only thing changed was fuel, what would be the approximate whp/wtq difference?

Q16 is 116 octane vs. E85 is 105 octane. However, that may not tell the complete story...read on...

I think E85 will make as much HP as Q16. I'll look for the thread...

...and here is the closest comparo I could find Wingz Performance E85 vs. 110 octane.

As you can see Wingz made way more power (+90whp;+100trq) on E85 than on 110 octane.

Q16 is 116 octane, so it will make more power than 110 octane. But I'm pretty sure the E85 will still out perform the Q16 on a real world turbo application.

EvoM member and EVO tuner Crispeed says, "I have made the same power on E85 as Q16 but the E85 provides a greater cooling effect and the results are often more consistent and successful." Quoted from this thread at rx7club dot com forum.

DISCLAIMER: I know squat about race gas; I know a little bit about E85.

Mike@AwdMotorsports · May 2, 2009, 04:26 PM

E-85 has made more power than Q16 on every evo we have tested both on.. My personal Evo makes 818whp on E85 at high 40psi boost range.. Ill take E-85 over 15.00/gal race fuel any day of the week.,.

Mike

skiracer · May 2, 2009, 06:13 PM

E85 is like running race gas with a water injection kicker...

D420mac · May 3, 2009, 01:39 AM

ok I'm starting to understand a bit now, how you guy's are getting this.

E-85 has less power when burned then Q16, so The E-85 requires, more fuel injected to compensate hence normally larger injectors. In addition it's cooler, which reduces pre-ignition and knock, allowing the tuners to get more HP out of it?

D420mac · May 3, 2009, 02:09 AM

Does anyone have a list of states that offer E-85?

Jim in Tucson · May 3, 2009, 09:05 AM

Here is the best single source in my opinion.

http://www.afdc.energy.gov/afdc/stat...nd_station.php

However, I would also do plenty of research. I'm not sure how current this USDE info is.

Other good sources are: Google (DUH!), regional sections of Evom & other car forums, fuel station companies, car clubs, local performance shops, local auto parts stores, guys driven' Hondahs with baseball caps on backwards (maybe), etc.

We are about to see an E85 explosion. The new Chevy Cruze and the Chevy Volt will be flex-fuel. Lots of other flex-fuel vehicles on the horizon. It will soon be everywhere. Like diesel is now. Thirty-six months from now E85 will be in every station. And remember you heard it here first!

pure_evo · May 3, 2009, 09:29 AM

This is nice information. It certainly brings to light a dyno graph I viewed about "x" turbo. I appreciate the timely feedback.

drewdq · May 3, 2009, 01:43 PM

mapquest under gas prices, has a good number of e85 locations in their database as well. For iphone users, it's is a nice site to quickly find some e85 if you're on a trip and failed to plan ahead.

So considering that some have made more power with e85 over q16, and the 13ish/gallon price difference, why do some people still prefer q16? I will not post names, but I know a tuner who prefers q16 over e85. Perhaps it has to do with fuel consistency?

This shop tunes plenty of evos/dsms with various fuels. I questioned them however, when I took my car to them months back to get a tune for 93 on my stock ecu, but they refused because I didn't have stock injectors and claimed having different injectors is 'dangerous' with the stock ecu, and there are others in the evo community that would agree.

So should this disqualify his opinion on fuels?

skiracer · May 3, 2009, 05:14 PM

Quote:

Originally Posted by drewdq

This shop tunes plenty of evos/dsms with various fuels. I questioned them however, when I took my car to them months back to get a tune for 93 on my stock ecu, but they refused because I didn't have stock injectors and claimed having different injectors is 'dangerous' with the stock ecu, and there are others in the evo community that would agree.

D420mac · May 3, 2009, 10:44 PM

What an idiot that guy dosen't know what he was talking about.

mplspilot · May 4, 2009, 12:26 AM

Quote:

Originally Posted by D420mac

ok I'm starting to understand a bit now, how you guy's are getting this.

E-85 has less power when burned then Q16, so The E-85 requires, more fuel injected to compensate hence normally larger injectors. In addition it's cooler, which reduces pre-ignition and knock, allowing the tuners to get more HP out of it?

That is incorrect. E85 makes more power because you can use more of it, because its stoich is much richer that gasoline's. In addition to all other of its fantastic properties