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      11-05-2012, 08:39 AM   #1
pbonsalb
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Compared: 87 E10, 93 E10, 93, 100, 105, E85 and M1

Grassroots Motorsports recently tested 87 E10, 93 E10, straight 93, 100, 105, E85 and M1 Methanol on a Miata with a standalone computer and tuned each on a Dynapack dyno to make the most power with the fuel. The differences results were not dramatic except for M1 Methanol:

87 E10 made 135 hp and 117 lbs tq
93 E10 made 136 hp and 124 lbs tq
93 made 134 hp and 122 lbs tq
E85 made 143 hp and 128 lbs tq
100 made 137 hp and 123 lbs tq
105 made 137 hp and 124 lbs tq
M1 made 160 hp and 140 lbs tq

December 2012 GRM

At least on the Miata, E85 offers about 6% hp and 3% tq over 93 E10; race gas offers about 2% power and no torque over 93 E10, and M1 offers about 16% hp and about 11% tq over 93 E10. There seem to be just a couple of race gas tests in the forum on the E9xM3:

Pencilgeek ran gained about 7.5% on 100 versus 91, with no tune, about a 7.5% difference.

http://www.m3post.com/forums/showpos...6&postcount=12

Someone else ran race gas versus pump, with no tune, and gained 2% power but lost 3% tq:

http://www.m3post.com/forums/showthr...lgeek+race+gas

Vishnu tested meth injection on top of 91, with just ignition timing changes, and gained about 6.5% power and torque:

http://www.m3post.com/forums/showthr...lgeek+race+gas

Race gas or E85 or M1 differences may be greater on a very high compression motor like the S65 that is probably often pulling timing and losing power relative to its rating in normal driving and should be greater on a forced induction motor with an even higher effective compression ratio under boost.
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      11-05-2012, 09:56 AM   #2
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Good stuff !
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      11-05-2012, 12:29 PM   #3
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I love E85..!!
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      11-05-2012, 04:30 PM   #4
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Wonder if anyone has run E85 with an ESS kit and tune. Just curious if I would gain anything or would need a tune FOR E85.
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      11-05-2012, 07:37 PM   #5
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You would need a tune because E85 requires about 1/3 more fuel and uses a different AFR for stoichiometric and peak power. It could be done, but you would have to find a tuner who would be willing to make you the tune, and you would be paying for some dyno time and tuning time. I doubt ESS would warranty the result.
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      11-05-2012, 08:51 PM   #6
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Nice post. I'd be happy with 93 if I could get it.
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      11-05-2012, 09:56 PM   #7
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Quote:
Originally Posted by Let It Rein View Post
Wonder if anyone has run E85 with an ESS kit and tune. Just curious if I would gain anything or would need a tune FOR E85.
I have , 20% e85 80% 93 car felt smoother , idled smoother & felt crisp in performance , afr's were 11.2-12.2 @ 8k ..
I also ran meth just to keep things in check but never dyno'd but will soon.
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      11-05-2012, 09:59 PM   #8
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Quote:
Originally Posted by CarbonFoot
Nice post. I'd be happy with 93 if I could get it.
+10000000000000
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      11-06-2012, 02:05 AM   #9
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Anywhere to get E85 in Socal? I want to do some testing with it.
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      11-06-2012, 09:38 AM   #10
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Ill just stick with 93...though I love the smell of C16 in the morning...
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      11-06-2012, 10:48 AM   #11
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Quote:
Originally Posted by Mike Benvo View Post
Anywhere to get E85 in Socal? I want to do some testing with it.
http://e85prices.com/e85map.php
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