Using E-85 as an octane booster...(mixing with E-85)
Using E-85 as an octane booster...(mixing with E-85)
I have done quite a bit of searching on the forums and looks like most of the threads are on using E-85, period.
I started thinking about this while driving back from picking up my car in FL and all the 93 octane I was buying always said "may contain up to 10% ethanol"...this was all the way to MO and was posted clearly on the pumps.
Here in NE we only have 91 octane...BUT...E-85 is a little more common. The 91 octane we do have is NOT mixed with ethanol at most pumps (at least...they don't post that it is... ).
Basically, any reason I couldn't find the right formula to get about 93 octane mixing in few gallons of E-85 (105 octane) and STILL only have around 10% ethanol to not overstep the owner's manual recommendation?
The reason I would want to do this is my car has a custom 93 octane tune...meaning Jerry(LET) tuned it...on the dyno...for a couple hours...and I don't really want to erase that with just a generic 91 octane tune. This car made some amazing HP in FL.
The downside of this is that I tried this same idea a few years ago with my stock black SRT-6 (45k miles) and ruined the fuel filter and fuel pump almost immediately..... I think there are multiple reasons why this car would be different, but I still remember getting stuck in Iowa and then shelling out about $700 dollars when all was said and done.
So....verdict?
or
Maybe just stick with more conventional octane boosters when needed like Torco or Klotz?
I started thinking about this while driving back from picking up my car in FL and all the 93 octane I was buying always said "may contain up to 10% ethanol"...this was all the way to MO and was posted clearly on the pumps.
Here in NE we only have 91 octane...BUT...E-85 is a little more common. The 91 octane we do have is NOT mixed with ethanol at most pumps (at least...they don't post that it is... ).
Basically, any reason I couldn't find the right formula to get about 93 octane mixing in few gallons of E-85 (105 octane) and STILL only have around 10% ethanol to not overstep the owner's manual recommendation?
The reason I would want to do this is my car has a custom 93 octane tune...meaning Jerry(LET) tuned it...on the dyno...for a couple hours...and I don't really want to erase that with just a generic 91 octane tune. This car made some amazing HP in FL.
The downside of this is that I tried this same idea a few years ago with my stock black SRT-6 (45k miles) and ruined the fuel filter and fuel pump almost immediately..... I think there are multiple reasons why this car would be different, but I still remember getting stuck in Iowa and then shelling out about $700 dollars when all was said and done.
So....verdict?
or
Maybe just stick with more conventional octane boosters when needed like Torco or Klotz?
Last edited by satellite; 05-18-2010 at 05:00 AM.
Re: Using E-85 as an octane booster...(mixing with E-85)
Before anybody chimes in...I guess in order to get 93 octane I would need about 1 gallon of E-85 (105 octane) per 6 gallons of Premium (91 octane) to get 93 octane as an end result. Maybe a tiny more than 10% ethanol....but haven't done the math on that yet.
Re: Using E-85 as an octane booster...(mixing with E-85)
We had 93 octane before they started mixing in the ethanol so it isn't the ethanol that gives us the 93. I'm not sure you are going in the right direction, even though E85 is supposedly higher octane.....it isn't gasoline and I think you will exceed the 10% before you get the octane level you are looking for.
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Re: Using E-85 as an octane booster...(mixing with E-85)
Re: Using E-85 as an octane booster...(mixing with E-85)
Originally Posted by BrianBrave
I guess the thing I'm more worried about is a repeat of my black SRT-6...but I'm guessing that car had NEVER seen any type of ethanol.
Re: Using E-85 as an octane booster...(mixing with E-85)
Originally Posted by danimal
We had 93 octane before they started mixing in the ethanol so it isn't the ethanol that gives us the 93. I'm not sure you are going in the right direction, even though E85 is supposedly higher octane.....it isn't gasoline and I think you will exceed the 10% before you get the octane level you are looking for.
Re: Using E-85 as an octane booster...(mixing with E-85)
We've had one person (that I know of) convert their XFire to flexfuel capability. Check here for information:
https://www.crossfireforum.org/forum...d-srt-6-a.html
After the conversion, then you should not have any problem adding additional ethanol if that is the route you want to take. Let us know how it works out.
https://www.crossfireforum.org/forum...d-srt-6-a.html
After the conversion, then you should not have any problem adding additional ethanol if that is the route you want to take. Let us know how it works out.
Re: Using E-85 as an octane booster...(mixing with E-85)
Originally Posted by danimal
We've had one person (that I know of) convert their XFire to flexfuel capability. Check here for information:
https://www.crossfireforum.org/forum...d-srt-6-a.html
After the conversion, then you should not have any problem adding additional ethanol if that is the route you want to take. Let us know how it works out.
https://www.crossfireforum.org/forum...d-srt-6-a.html
After the conversion, then you should not have any problem adding additional ethanol if that is the route you want to take. Let us know how it works out.
Also, I believe bikecop sold his car...so there goes any long term testing..
Last edited by satellite; 05-18-2010 at 11:41 PM.
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Re: Using E-85 as an octane booster...(mixing with E-85)
These folks are listed as selling Sonoco 100 Unleaded Fuel at the pump in your area. Motor Fuels - Nebraska Iowa Supply Company Give em' call.
Might be safer then mixing then E85.
Luckily there are 3 stations close by me that pump 100 octane unleaded.
Might be safer then mixing then E85.
Luckily there are 3 stations close by me that pump 100 octane unleaded.
Re: Using E-85 as an octane booster...(mixing with E-85)
the 93 in which your car was tuned on had 10% ethel in it. So adding ethel into 92 wont give you the octane you need. Buy a 1 gallon fuel can with a locking cap or something and load that up with 100+ octane and just mix that in with the 92 and you will be fine.
Re: Using E-85 as an octane booster...(mixing with E-85)
That 100 octane is a little far away (different side of town), but worth it for peace of mind. I'll probably just stick with 91 for daily driving and then raise the octane with some mixing of 100 octane for the track or harder driving. Thanks for the responses, guys.
It's not going to cause any issues using the 93 tune if I drive lightly on 91 octane, right? It's going to get a little expensive fairly quick if I'm constantly running across town and getting a couple gallons of 100 to add to the 91. Maybe I should just get a big 'ole drum of it.
Any experience with Torco or other real octane boosters? Not the "104" junk at Pep Boys.
It's not going to cause any issues using the 93 tune if I drive lightly on 91 octane, right? It's going to get a little expensive fairly quick if I'm constantly running across town and getting a couple gallons of 100 to add to the 91. Maybe I should just get a big 'ole drum of it.
Any experience with Torco or other real octane boosters? Not the "104" junk at Pep Boys.
Last edited by satellite; 05-19-2010 at 09:42 PM.
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Re: Using E-85 as an octane booster...(mixing with E-85)
I truely don't think you can achieve what your looking too with E85.
TORCO is the absolute easieat and cheapest way to boost your full tank.
about-----$21.00 per guart (32oz)
24oz. boosts 15 gallons of 91 octane to 95 octane can't beat that!
Generally I pay $9.50 per gallon for 105 octane here in Great Falls.
Our closest TORCO dealer is 175 miles but would like to buy a 5 gallon container this spring.
Mike
TORCO is the absolute easieat and cheapest way to boost your full tank.
about-----$21.00 per guart (32oz)
24oz. boosts 15 gallons of 91 octane to 95 octane can't beat that!
Generally I pay $9.50 per gallon for 105 octane here in Great Falls.
Our closest TORCO dealer is 175 miles but would like to buy a 5 gallon container this spring.
Mike
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