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Old May 3rd, 2011, 07:42 AM   #1
Mulely
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Default School me on E85 carb conversions

So I realize that E85 doesn't have the BTU's as gasoline, but my motor is very high compression and I figured why not try to run it since it's so much cheaper. So, what do I have to look out for in my fuel system that is going to be affected by the alcohol?
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Old May 3rd, 2011, 08:04 PM   #2
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holley makes a carb kit for alcohol the mail oredr speed shops sell them. Not sure your set up rubber hose does not last long with alcohol.I think you need the run about 10% larger jets to start
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Old May 3rd, 2011, 09:09 PM   #3
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E 85 is poor mans race fuel. It is about 105 octane. It attacks any thing rubber in the fuel system. Needle and seats, floats unless brass. E 85 also like to colect water in the fuel system if you dont drive it every day. I had a problem with this in my chevy. I thought it was a lot of up front cost, and extra work But is cheaper than 110 in the long run if you are going to drive it a lot. Regular race gas performs better in my application. I have a 11.75-1 compression ratio in a 406 in a 86 chevy c-10. If I was going to do it again I would run 110 all the time, Or a 50/50 93-110 blend. Race fuel has not gone up in over 4 years, Cant figure this one out I have payed 5.50 a gallon for 110 the last 4 years. Just my 2 cents
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Old May 3rd, 2011, 09:29 PM   #4
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I have been running it for the last 3-4 years, love it. It takes a dedicated carb. to work right, can't just do it with jet changes. I would stay away from diy conversion kits, most people don't seem happy with them. I have been using Pro-Systems E85 carbs (www.prosystemsracing.com/e85.html) and they have been spot on.
Eric @ Horsepower Innovations (www.horsepowerinnovations.com)
and Mark Sullens (www.marksullense85carburetors.com) are two other E85 carb builders that have many happy customers.

It takes about 30% more fuel volume so make sure your pump is big enough.


Bout' the only thing you really need to watch for is with paper fuel filters, some have issues with the glue coming apart. I use a stainless mesh filter. I run standard push-loc and braided fuel lines and have seen no issues with them.
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Old May 5th, 2011, 07:48 PM   #5
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So will a standard Holley mechanical fuel pump still work or will that die a fast death too? I've never taken one apart so I don't know what's in it?
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Old May 6th, 2011, 03:06 PM   #6
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Quote:
Originally Posted by pitbull2332 View Post
E 85 is poor mans race fuel. It is about 105 octane. It attacks any thing rubber in the fuel system. Needle and seats, floats unless brass. E 85 also like to colect water in the fuel system if you dont drive it every day. I had a problem with this in my chevy. I thought it was a lot of up front cost, and extra work But is cheaper than 110 in the long run if you are going to drive it a lot. Regular race gas performs better in my application. I have a 11.75-1 compression ratio in a 406 in a 86 chevy c-10. If I was going to do it again I would run 110 all the time, Or a 50/50 93-110 blend. Race fuel has not gone up in over 4 years, Cant figure this one out I have payed 5.50 a gallon for 110 the last 4 years. Just my 2 cents
Wow, i need to live by you then!!!
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Old May 6th, 2011, 03:11 PM   #7
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So will a standard Holley mechanical fuel pump still work or will that die a fast death too? I've never taken one apart so I don't know what's in it?
Not sure on the Holley but I ran an edelbrock for almost 2 years and had zero issues.
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Old May 6th, 2011, 03:34 PM   #8
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I just went 9.82 on E85 Wed. night!

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Old May 11th, 2011, 11:43 AM   #9
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I love E85 and it 90% of what you will hear about it is wrong. I've been playing with it for years and it's never eaten anything. I left it in my aluminum fuel cell for almost a year and when I drained it out it had no residue in it. The reason everyone thinks it eats rubber line is that it's a really good solvent and loosens all the crap from the dirty old fuel system you ran and deposits it in your filters. It's not eating anything, it's cleaning your nasty 20 year old tank.

It makes good power if you build your combo to use it. Here's 1000rwhp smoking the tires on the rollers.

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Old May 11th, 2011, 11:49 AM   #10
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Enjoy.



I never got a full pass in that day because my burnout rev limiter was hooked to my brake light switch and would trip 3/4 of the way down the track. It since went 8.73 @ 154mph on low boost.
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