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Old 11-18-2012, 02:13 PM   #31 (permalink)
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Quote: Originally Posted by underSRTarmor View Post
I think e85 is less than 110 oct. at least pump 85. It more around 96 or so.



OK then if its only 96 octane than how can it trump 100 Turbo Blue?
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Old 11-18-2012, 02:21 PM   #32 (permalink)
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Which octane rating do you go by? the 104 0r 100? http://racingasoline.com/products/tu..._unleaded.html
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Old 11-18-2012, 02:25 PM   #33 (permalink)
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Quote: Originally Posted by viper gts View Post
OK then if its only 96 octane than how can it trump 100 Turbo Blue?


I said around 96. So like 95-100


It's properties. And the fact there more volume. 30% or so.


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Old 11-18-2012, 02:26 PM   #34 (permalink)
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Quote: Originally Posted by viper gts View Post
OK then if its only 96 octane than how can it trump 100 Turbo Blue?

Simple.. Ethanol is not gasoline... different burning properties
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Old 11-18-2012, 02:27 PM   #35 (permalink)
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I still dont fully understand the octane ratings. There's MON, RON, and the (R+M)/2 that you see at the pump (e85 being 94-96 under the R+M rule). C16 is 117 octane, yet pump e85 makes very similar power numbers. It really is something i want explained. If the octane rating numbers are important, then why is something rated so low, capable of so much timing advance and power?

I've googled the hell out of octane ratings and ethanol to try and understand why it acts like it does.
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Old 11-18-2012, 02:41 PM   #36 (permalink)
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Quote: Originally Posted by Zenkat View Post
I still dont fully understand the octane ratings. There's MON, RON, and the (R+M)/2 that you see at the pump (e85 being 94-96 under the R+M rule). C16 is 117 octane, yet pump e85 makes very similar power numbers. It really is something i want explained. If the octane rating numbers are important, then why is something rated so low, capable of so much timing advance and power?

I've googled the hell out of octane ratings and ethanol to try and understand why it acts like it does.

ethanol burns cooler and faster
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Fuel - , 900cc fic inj , -6an feed and return lines , fuel pump rewire , bottle neck fix , Bosch 044 intank , aeromotive rrfpr , E85..
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Old 11-18-2012, 02:50 PM   #37 (permalink)
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Quote: Originally Posted by comatoast View Post
ethanol burns cooler and faster

Slower.

Thus why u can lite it sooner. (Advance timing.) with out knock


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Old 11-18-2012, 03:14 PM   #38 (permalink)
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Quote: Originally Posted by underSRTarmor View Post
Slower.

Thus why u can lite it sooner. (Advance timing.) with out knock



agh.. sorry.. I knew it sounded wrong
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Fuel - , 900cc fic inj , -6an feed and return lines , fuel pump rewire , bottle neck fix , Bosch 044 intank , aeromotive rrfpr , E85..
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Old 11-18-2012, 03:32 PM   #39 (permalink)
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Most reports put E85 around the 95-97 range for pump. Just what I've read.

Wikipedia used to explain it fairly well, whether it does now or not I am unsure. Haven't checked the page in months.
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Old 11-18-2012, 03:55 PM   #40 (permalink)
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Quote: Originally Posted by burks View Post
Most reports put E85 around the 95-97 range for pump. Just what I've read.

Wikipedia used to explain it fairly well, whether it does now or not I am unsure. Haven't checked the page in months.

your kind of missing the point... When it comes to Octane ratings ethanol is in a different class than pump or race gas due to its burn rate
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Fuel - , 900cc fic inj , -6an feed and return lines , fuel pump rewire , bottle neck fix , Bosch 044 intank , aeromotive rrfpr , E85..
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Old 11-18-2012, 04:11 PM   #41 (permalink)
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Quote: Originally Posted by underSRTarmor View Post
Slower.

Thus why u can lite it sooner. (Advance timing.) with out knock



If it burns slower why do you use 30% more fuel?
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Old 11-18-2012, 06:43 PM   #42 (permalink)
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Viper- You need ~30% more because its ethanol....not gas. And E85 has excellent cooling properties + higher octane that allows it to compete power wise with C16.

I'm on my phone otherwise I'd write more...but if you wanna run 1 of the three options for Max power, run E85....it will make way more power over 100oct or pump/100% meth mix.

I would run E85 if it was convenient for me....its not so I run pump/meth with no problems and great power.

I've also run MS109 and C16 in both my SRT4 and WRX with no I'll effects.
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Old 11-18-2012, 06:43 PM   #43 (permalink)
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Quote: Originally Posted by viper gts View Post
If it burns slower why do you use 30% more fuel?


^^ good question.

a gallon of ethanol contains approx. 80,000 BTUs.
A gallons of unleaded regular contains about 119,000 BTUs.


So there its less energy per gallon. This is why it takes more fuel and u get less mph.


http://wiki.xtronics.com/index.php/Energy_density


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Last edited by underSRTarmor; 11-18-2012 at 06:49 PM.
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Old 11-18-2012, 07:19 PM   #44 (permalink)
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If you want to run the highest octane unleaded race gas then your choice is Shell URT Advance with. R+M/2 of 110 but it costs about $15/gal compared to $3 something for E85...and E85 will make C16/Q16 like power.
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Old 11-18-2012, 10:37 PM   #45 (permalink)
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he can run that ftw purple stuff not sure what its called but its $33 dollars a gallon
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