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 Post subject: E-85 fuel and 12.7:1 c/r
 Post Posted: Sun Jan 13, 2013 3:39 pm 
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Joined: Tue Apr 18, 2006 9:38 pm
Posts: 716
Location: Mason City, Iowa
hey guys, im getting plans ready to do my big block build and the Eagle rotating assebly im going to go with has a 12.7:1 w/118cc head or 11.8:1 w/124cc head. I DO plan on driving this truck on the street and going on cruises with it etc BUT i also am going to be using this as a pretty serious bracket truck as well, so im gonna want as much compression as i can safely get by with while still being able to drive it on the street.

ive been TOLD by some pretty knowledgeable motor heads that E-85 fuel with that amount of compression is still streetable. I cant find much to research online for that so ive come here for opinions and thoughts.

There is another option for the competition rotating assembly with much lower compression ratios that range from 10.7:1 w/112cc head to 10.2:1 w/118cc head or down to 9.7:1 w/124cc head , but i dont feel that will be enough compression to get me up into the power range im wanting for this engine.



So if any of you guys are knowledgeable in E-85 fuel and what kind of compression it can run and still be streetable then your who id like to see reply to this. Until i get an affirmative on this i wont order anything as id hate to spend 2500 bucks on a rotating assy i cant run on the street with E-85.

Thanks guys!!

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Image

R/T: .194
60': 2.322
330: 6.379
1/8: 9.803
MPH: 71.37
1000: 12.781
1/4: 15.314
MPH: 88.79


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 Post Posted: Sun Jan 13, 2013 4:08 pm 
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Joined: Mon Oct 29, 2007 7:07 pm
Posts: 1422
Location: Florida
I just ran my 461 CI SB2.2 engine yesterday, a 1050 with E85 thru a throttle stop. I dialed the stop in, last pass 8.887@164. With the stop off I ran a string of runs from 4.917 to 4.933 1/8 mile. Oh and the engine is 15.5 to 1... O:)

We've run it at 13.2 and 14.5 to 1 on two other engines. I think you'll be fine. ;-)


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 Post Posted: Sun Jan 13, 2013 4:24 pm 
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Joined: Tue Apr 18, 2006 9:38 pm
Posts: 716
Location: Mason City, Iowa
holy crap, E-85 is safe for as high as 15.5:1?!?!?!?!

However, will the street part of it still be an issue or not? Will that high of compression have any adverse effects on streetability etc

_________________
Image

R/T: .194
60': 2.322
330: 6.379
1/8: 9.803
MPH: 71.37
1000: 12.781
1/4: 15.314
MPH: 88.79


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 Profile  
 
 Post Posted: Sun Jan 13, 2013 7:27 pm 
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Joined: Mon Oct 29, 2007 7:07 pm
Posts: 1422
Location: Florida
Up to 14 to 1 I can't imagine any issues. I had my 13.2 to 1 engine so lean due to a bad regulator it was surging on track and never hurt it. Above 14 to 1 you just need to keep an eye on thi he until the tune is correct, and watch the gas/ethanol percentages.


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 Post Posted: Sun Jan 13, 2013 8:23 pm 
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Joined: Tue Apr 18, 2006 9:38 pm
Posts: 716
Location: Mason City, Iowa
ok sweet, and how can i check gas/alcohol percentages? is there some kind of tester i can buy or something of that nature. i know they can vary from like 70% to 90% alcohol

_________________
Image

R/T: .194
60': 2.322
330: 6.379
1/8: 9.803
MPH: 71.37
1000: 12.781
1/4: 15.314
MPH: 88.79


Top 
 Profile  
 
 Post Posted: Sun Jan 13, 2013 9:24 pm 
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Joined: Mon Oct 29, 2007 7:07 pm
Posts: 1422
Location: Florida
Real easy.
http://www.quickfueltechnology.com/spec ... -tube.html

Are you planning to run a carb or injection?


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 Post Posted: Sun Jan 13, 2013 10:40 pm 
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Joined: Tue Apr 18, 2006 9:38 pm
Posts: 716
Location: Mason City, Iowa
im gonna run a demon E-85 carb, i talked with demon this past summer and they said theyd have them avail hopefully by fall, havent checked back yet though...will check now

_________________
Image

R/T: .194
60': 2.322
330: 6.379
1/8: 9.803
MPH: 71.37
1000: 12.781
1/4: 15.314
MPH: 88.79


Top 
 Profile  
 
 Post Posted: Mon Jan 14, 2013 10:24 pm 
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Joined: Thu Jan 29, 2009 10:59 am
Posts: 438
Location: Auburndale, Florida
ProStreet83C10 wrote:
im gonna run a demon E-85 carb, i talked with demon this past summer and they said theyd have them avail hopefully by fall, havent checked back yet though...will check now


You got a carb now? Convert that.


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 Post Posted: Tue Jan 15, 2013 10:50 pm 
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Joined: Tue Apr 18, 2006 9:38 pm
Posts: 716
Location: Mason City, Iowa
i do but its a 600 cfm quadrajunk......not nearly enough for what im gonna do

_________________
Image

R/T: .194
60': 2.322
330: 6.379
1/8: 9.803
MPH: 71.37
1000: 12.781
1/4: 15.314
MPH: 88.79


Top 
 Profile  
 
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