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 Post subject: Re: E85??
 Post Posted: Sat Nov 19, 2011 3:38 pm 
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My brothers car is at 14.5 to 1, I have not got around to putting mine back together yet to try. His 14.5 to 1 was working OK yesterday...

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 Post subject: Re: E85??
 Post Posted: Sat Nov 19, 2011 4:03 pm 
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It was mentioned to store some E85 in some old race drums. I dont know what the situation is in USA but this is what happens in Australia. Normal street grade fuel unleaded MELTS the plastic gasket thats used by VP for cap sealing the race fuel drums. SO E85 would do the same as it has regular grade unleaded in it.
Is that the case with US street fuels?
Do they melt the plastic caps too?


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 Post subject: Re: E85??
 Post Posted: Sat Nov 19, 2011 4:11 pm 
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Location: Auburndale, Florida
Shrinker, at the dyno we've been keeping the E85 in a VP drum. So has jmark I think. I'll have to runover and see what the cap looks like.

Scott, check your PM.


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 Post subject: Re: E85??
 Post Posted: Sat Nov 19, 2011 4:31 pm 
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It does affect certain plastics, got some on one of my screwdrivers and the handle got slimy... I think it was the ethanol that did it though.


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 Post subject: Re: E85??
 Post Posted: Sat Nov 19, 2011 4:50 pm 
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According to http://www.rockettbrand.com/productspecs/specs.html E85 is only 108 Motor octane.


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 Post subject: Re: E85??
 Post Posted: Sat Nov 19, 2011 5:49 pm 
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jmarkaudio wrote:



Very cool Mark, Have you guys checked you fuel to see what the diff is??

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running E85
Best ET 8.07
Best MPH 170.71
Barry


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 Post subject: Re: E85??
 Post Posted: Sat Nov 19, 2011 5:58 pm 
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Beretta wrote:
Gee didn't know there was a summer and winter blend #-o ...
What's different???


I believe it has more gas in it to help get the engine started in cold weather. The colder the climate, the more gas they mix with it so at that point it's not really E85 but like E75, etc.

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 Post subject: Re: E85??
 Post Posted: Sun Nov 20, 2011 2:48 am 
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jmarkaudio Nice ride, looks like it may need some bars.


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 Post subject: Re: E85??
 Post Posted: Sun Nov 20, 2011 5:34 am 
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With our street fuel all you have to do is leave some in a drum and it melts the cap. You dont have to pour any, just the vapors are enough. The drums have a flexible pull up style cap and its the flexible plastic that melts.


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 Post subject: Re: E85??
 Post Posted: Sun Nov 20, 2011 5:53 am 
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Scott Smith wrote:
According to http://www.rockettbrand.com/productspecs/specs.html E85 is only 108 Motor octane.

Hi Scott. Straight Methanol is 105MON so theres no problem with E85.


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 Post subject: Re: E85??
 Post Posted: Sun Nov 20, 2011 9:24 am 
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So the cooling effect of the Ethanol will prevent detonation?

My engine will pepper the plugs with 110 Motor Octane and 27 degrees of timing.
114 Motor Octane does fine.

The compression is exactly 15.3 (No estimate)


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 Post subject: Re: E85??
 Post Posted: Sun Nov 20, 2011 10:32 am 
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Excessive heat is what causes detonation. If you look at the table below, you can see how much heat is absorbed per gallon to vaporize the fuels, Latent Heat of Vaporization. Big difference.

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 Post subject: Re: E85??
 Post Posted: Sun Nov 20, 2011 10:40 am 
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Scott you sound like me as I'm looking for ways to run that stuff too and my engine is 15.2. I was waiting for jmark to see if his 15.5 will live on it or not as I can't afford to build another one. The nearest E85 to me is 60 miles away and I've got a couple of steel drums that I've used for methanol that I could use for E85. 55 gallons would probably last me over a year no more than I race and from what I hear, the price is right also as I'm having to pay over $3 a gallon for methanol now.

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 Post subject: Re: E85??
 Post Posted: Sun Nov 20, 2011 11:56 am 
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Ken,
I'm paying 14.00 a gallon for Q16 ;-)

I know my car is a turd on Methanol. Maybe this E85 will give the same performance as Q16 and be able to manage temperature a little better when going rounds.


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 Post subject: Re: E85??
 Post Posted: Sun Nov 20, 2011 3:07 pm 
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Scott Smith wrote:
So the cooling effect of the Ethanol will prevent detonation?

My engine will pepper the plugs with 110 Motor Octane and 27 degrees of timing.
114 Motor Octane does fine.

The compression is exactly 15.3 (No estimate)


I think your engine is right on the cusp of where it could be successful with a fuel that has higher latent heat like alcohols. to achieve that success though you would have to improve the homogenization. Its not only compression ratio that you have to judge engine by for fuel spec. 15.3 can be run with no issues on methanol in the right circumstances. A tunnel ram engine like yours can do it easy. Single carb may not due to runner flow differences along the engine that are unavoidable.
The thing to look for is does it pepper all the plugs the same amount and is the power there on the lower MON fuels once you back the timing off.

The cooling effect of ethanol is a variable thats related to the homogenization and vaporization. If an engine has lower levels of either then it becomes more likely to detonate and will require higher octane fuels to counter that. The less vaporization there is the lower octane is the gaseous environment. Low octane chemicals are lower distillation temperature stuff (as a general statement) for liquid state room temperature HC's. The trouble with E85 is its got junky street gasoline low temp chemicals in it. If E85 was made with race unleaded that would be excellent but then it would cost heaps more.


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