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Old 02-08-2013, 08:13 PM   #46 (permalink)
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http://delphi.com/pdf/techpapers/2010-01-0619.pdf

this answers alot of questions.
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Old 02-09-2013, 01:09 PM   #47 (permalink)
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Quote: Originally Posted by Boosted7o6SrT4 View Post

Very nice info there

Points of interest in the above paper:
  1. MBT of E85 was within 1-2 degrees of the gas---This is why I use the stock gas MBT timing table in all my E85 tunes. The stock MBT table keeps the timing at a reasonable limit.
    ,
  2. E50 and E85 have the same octane= 96.5--interesting and counter-intuitive. So will E50 have similar Knock resistance but with better MPG and less taxing on the fuel system??? Is there an E50 winter blend? I doubt it. There's a couple stations with E50 pumps nearby, so it maybe worth some testing.
    .
  3. E85 increased VE by 2% and thermal eff went up around 5% compared to gas.---nice benefit but the test engine was DI so both should be less on port injected engine.
    .
  4. EGT increased for Gas as CR went up because of the retarded timing but for E85, EGT decreased as CR went up.----This is why I run my E85 tunes at a leaner A/F, around 12.5 and have from the beginning.
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Old 02-10-2013, 09:05 AM   #48 (permalink)
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Quote: Originally Posted by duster360 View Post
,[*]E50 and E85 have the same octane= 96.5--interesting and counter-intuitive. So will E50 have similar Knock resistance but with better MPG and less taxing on the fuel system??? Is there an E50 winter blend? I doubt it. There's a couple stations with E50 pumps nearby, so it maybe worth some testing.
.

I knew it !

This explains why I was getting great results with a 50/50 blend of gas/e85 . I've never noticed an e50 blend around here . I'm assuming an e50 blend would contain a regular octane gasoline component . So , if you blend yourself using an e85 or e100 and a high octane gasoline component , could you end up with slightly better results ?
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Old 02-10-2013, 12:14 PM   #49 (permalink)
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Default Re: water meth or E85

Honestly...who gives a shit what the octane of E85 actually is.

There are NUMEROUS studies amd reports of anywhere from 95 to 105 octane. The fact is that E85 is essentially equivalent to C16.

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Old 02-10-2013, 02:20 PM   #50 (permalink)
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Quote: Originally Posted by apexcrazy View Post
if you blend yourself

I would never EVER recommend that.
imo, its either straight out of the pump or nothing.
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Old 02-10-2013, 03:33 PM   #51 (permalink)
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May I ask why ? Safety issue , or consistency issue ?
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Old 02-10-2013, 06:08 PM   #52 (permalink)
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Quote: Originally Posted by apexcrazy View Post
Safety issue , or consistency issue ?

Yes and Yes,,,,mostly the later.
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Old 02-10-2013, 06:41 PM   #53 (permalink)
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Quote: Originally Posted by duster360 View Post
Yes and Yes,,,,mostly the later.

So its says the higher the compression the less knock you SHOULD encounter, also in another article i read the richer you have e85 the less Knock you Should encounter allowing you to run more timing. Thoughts/Comments?? Thats what i got outta this paper and the statment below is not my words

ethanol (and methanol) has a very high latent heat evaporation rate,

this means as the ethanol is made into tiny droplets ,

the methanol basically sucks the heat out of the air.

This drops the intake temp like a prom dress.

This process helps prevent detonation, therefore you can use

more timing, compression, etc to build more cylinder

pressure, hence more horsepower (actually more torque).

It is kinda involved, but that should give you an idea.

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Old 02-11-2013, 06:54 PM   #54 (permalink)
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Ive ran both for a looong time. They both help a ton. But the E85 when tuned for it is just fuckin nuts. the info is out there if you research it.. My temps would drop when ever I would street race where the water/meth injection just couldn't "keep up" with the heat that the turbo/engine was producing.
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Old 02-15-2013, 02:10 AM   #55 (permalink)
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E85 will make more power than water / meth injection. It's also more reliable.
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