What is the RON (octane rating) of E85?

[mooks6669]

Put a tank of e85 on the weekend in my SS... car is on steroids....lots of power...burns more but woth the bang!!..any idea how much more octane than prem 98 it has??

[HoZy]

108-109 Octane. Not advised for stock fuel systems. Will cause damage.

[Cheap6]

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[DLFHUB666]

108-109 Octane. Not advised for stock fuel systems. Will cause damage.

Got this off wiki: If a retailer chooses to post octane, they should be aware that the often cited 105 octane is incorrect. This number was derived by using ethanol’s blending octane value in gasoline. This is not the proper way to calculate the octane of E85. Ethanol’s true octane value should be used to calculate E85’s octane value. This results in an octane range of 94-96 (R+M)/2. These calculations have been confirmed by actual octane engine tests." [6]

[2DIE]

Ive seen cars (on TV car programs) tuned to run this and the results on the dyno are pretty good, I cant remember how much from memory.

From what I am reading now though you can lose up to 30% fuel econemy in cars not designed to run on it.

Have a read here E85 - Wikipedia, the free encyclopedia

Interesting that test results show its 94-96 RON, but other factors are involved.

I used E10 the other day and at the pump it says 94 RON but it ran like crap so I topped it up with 98 from a different servo.

[padrickz88]

Ive seen cars (on TV car programs) tuned to run this and the results on the dyno are pretty good, I cant remember how much from memory.

From what I am reading now though you can lose up to 30% fuel econemy in cars not designed to run on it.

Have a read here E85 - Wikipedia, the free encyclopedia

Interesting that test results show its 94-96 RON, but other factors are involved.

I used E10 the other day and at the pump it says 94 RON but it ran like crap so I topped it up with 98 from a different servo.

E85 seems to be pretty awesome alot of guys with 2jz's are able to run 25psi+ easily with e85 apparently...

[ari666]

for the brief amount of reading i have done (very brief) the amount you have to change to run it as a daily fuel outweighs the benefits.

everything rubber has to be replaced with synthetic. stainless fuel lines need to be used, fuel pump should be removed from the tank and run externally, etc etc etc


plus you burn more E than you would petrol, so fill up are more frequent.


discuss:

[2DIE]

^^ sounds about the same as I have read, most places say its to be too acidic/corrosive for standard fuel systems.

[HoZy]

But boy it'd be fun to have it locally available an be able to have your car tuned for it ^_^

[SIG-054]

Where are you guys getting all your info from lol

[HoZy]

Ethanol Performance Australia

AND

Ethanol Answers

Where I did my research.

[SIG-054]

I actually use the stuff, and have been for a long time. Hasnt affected my lines, rubbers or anything one bit.

YouTube - Eighty-five percent ethanol fuels non FFV for 100,000+ miles

[delcowizzid]

not a good video at all really noone reads plugs off them charts since efi and lead removal from fuel LOL lots of cylinder leakage on the rings plugs starting to get fowled hoses softened thats what ethanol does makes fuel hose soft and leads to high pressure bursts in flexible lines lots of fires been reported in efi pressure situations with the incorrect hose for e85 .its all a scam ide never touch the stuff

[mooks6669]

errrr...Anyone remember the Series 2 VE is a flex car????...everything has been modified such as fuel lines etc....so 94-96 ron you all reckon...anyway i reckon my car runs awesome on it

[2DIE]

I read that on the Holden website today, VFM or FVM or something along those lines. In that case it probably wont do any harm.