Guest Computerguy5 Posted July 5, 2002 Report Share Posted July 5, 2002 Anyone know what it is??? I know its 14.7:1 for gasoline, but what about methanol? Quote Link to comment Share on other sites More sharing options...
Science Abuse Posted July 5, 2002 Report Share Posted July 5, 2002 I'd think it would depndon engine size andwheatherits blown ornot. Mine runs best just short of 12 on 93 octane gas, 14 would be rich for my N/A app. Quote Link to comment Share on other sites More sharing options...
SupraGlue Posted July 5, 2002 Report Share Posted July 5, 2002 About half of that for gasoline. Quote Link to comment Share on other sites More sharing options...
Guest Computerguy5 Posted July 6, 2002 Report Share Posted July 6, 2002 Originally posted by Stolen UFO: About half of that for gasoline.As in 7:1 or 28:1? (By the way you worded it, it could be taken either way) Quote Link to comment Share on other sites More sharing options...
SupraGlue Posted July 6, 2002 Report Share Posted July 6, 2002 You run alcohol roughly twice as rich as you do gasoline, so the ratio would be half, as in around 6 or 7 to 1. Thus, an alcohol fuel system needs to be designed for around double the flow of a gasoline one -- pumps, lines, injectors. Quote Link to comment Share on other sites More sharing options...
Akula Posted July 8, 2002 Report Share Posted July 8, 2002 We run a set of Ron's Flying Toilets on the Altered. The thing to remember with Alcohol is that is carries more O2 than Gas and the "Octane" rating is about 130. You can put a huge volume of fuel into the motor and it will run. However, bearing that in mind, if you run the motor too rich you will have the fuel exploding in the exhaust system not the cylinders. What you should do is ask the manufacturer what a good base setup for your system would be. Then get an EGT meter setup. Run the motor and warm it up (use race gas to start the engine, alcohol doesn't start well). Rev the engine a few times and see where the temp peaks out. If you are running about 900 - 1000 degrees, take it on the track and get a peak at 1/8th mile. If you are over 1100 degrees you need to fatten up a bit. If you are way under on your peak you need to lean it out. Hope any of this helped. Quote Link to comment Share on other sites More sharing options...
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