gas and alcohol
#2
I'd have to go look, but one of the carb companies in the National Dragster is advertising a 75/25 Gas/Alcohol carb. It's a matter of getting the metering correct. 10% is probably within the jet capabilities of most Holly carbs. Also less issue with the corrosive properties of methanol and no need for top oil additive. I have considered this myself, but haven't tried it yet. Too many other irons in the fire....
#3
Senior Member
EXPERT BUILDER
Join Date: Jun 2005
Location: potash country
Posts: 262
Dude..............take note whats on my engine! I guess you've seen it in action before,pure alcohol is the way to. Once you've tryed it you won't go back! Close your eyes and just think,tunnel ram and enderle Thats about 9% extra HP all the time 8)
#4
Senior Member
RACING JUNKIE
Join Date: May 2003
Location: Coldwater, MI
Posts: 2,998
Originally Posted by jmarksdragster
I'd have to go look, but one of the carb companies in the National Dragster is advertising a 75/25 Gas/Alcohol carb. It's a matter of getting the metering correct. 10% is probably within the jet capabilities of most Holly carbs. Also less issue with the corrosive properties of methanol and no need for top oil additive. I have considered this myself, but haven't tried it yet. Too many other irons in the fire....
I'd go one way or another, alky is my choice
#6
Senior Member
RACING JUNKIE
Join Date: Sep 2007
Location: Belleville, IL
Posts: 658
Yes, I have mixed alky with gas at a 15% level back in the early/mid 90s, before moving to 100% alky.
The engine was a 462 BBC, oval port heads (049 castings), with a Crane Cam (.648/.669 solid flat tappet). 9.5:1 static compression with 8 Lbs of blower boost from a B&M Powercharger 250 (equiv of 4-71).
The carb was produced from a local supplier called C&M (no longer in business to my knowledge). The carb looked pretty much like the precursor to the Holley HP line. It started as a 750 CFM Double pumped, but wound up flowing 1020 CFM after they were done with it. I really regret having sold the carb, it was a nice piece.
We were running 93 octane pump gas through the motor with the 15% mix. The motor ran cooler, and we had zero issues with detonation. I don't recall how much it picked up, but I do recall a lower e.t. with the mix. It could have either been due to the decreased air charge?
Who knows. I know it worked, and thats all I cared about. We tried higher percentages of alky, but the fuel separated too much.
The engine was a 462 BBC, oval port heads (049 castings), with a Crane Cam (.648/.669 solid flat tappet). 9.5:1 static compression with 8 Lbs of blower boost from a B&M Powercharger 250 (equiv of 4-71).
The carb was produced from a local supplier called C&M (no longer in business to my knowledge). The carb looked pretty much like the precursor to the Holley HP line. It started as a 750 CFM Double pumped, but wound up flowing 1020 CFM after they were done with it. I really regret having sold the carb, it was a nice piece.
We were running 93 octane pump gas through the motor with the 15% mix. The motor ran cooler, and we had zero issues with detonation. I don't recall how much it picked up, but I do recall a lower e.t. with the mix. It could have either been due to the decreased air charge?
Who knows. I know it worked, and thats all I cared about. We tried higher percentages of alky, but the fuel separated too much.
#7
Member
CRAFTSMAN
Join Date: Feb 2005
Location: Iowa
Posts: 53
Re: gas and alcohol
Originally Posted by superstreeter
Iv`e been thinking about this for a while. Anybody mixing gas with small amounts (5-10%) of alcohol ? are there any advantages to this?