bigboy Posted April 22, 2016 Report Posted April 22, 2016 DM guys out there. What oil mix ratio to Alcohol? Quote
stpltn Posted April 23, 2016 Report Posted April 23, 2016 I always ran 24:1 but it wasn't on a twin. Quote
locogato11283 Posted April 23, 2016 Report Posted April 23, 2016 We run 32 ounces to 5 gallons, whatever ratio that is. Quote
PaymentPlan Posted April 23, 2016 Report Posted April 23, 2016 That's 20:1Why do drag racers run such a lower ratio? For protection? Quote
trickedcarbine Posted April 23, 2016 Report Posted April 23, 2016 Alky and these are typically motors with massive ports that the Pistons could use a little bit of extra protection when sliding past them. 1 Quote
stpltn Posted April 23, 2016 Report Posted April 23, 2016 My particular reasoning is a 102.5 bore. My digatron would read around 9800-10000. So I ran 24:1. Klotz Benol/M1. I would run a big bore or even a small bite twin the same if it ran on alky. A lot of oil will never hurt in my opinion. Jet larger for more fuel. Quote
stpltn Posted April 23, 2016 Report Posted April 23, 2016 Digatron could have lied. I don't really know. MSD 4217 doesn't have data log capabilities. So who knows Quote
J-Madd Posted April 26, 2016 Report Posted April 26, 2016 There was some information passed along by someone long ago that 20:1 made more powa on the dyno. Possibly due to the BTUs that the castor component adds to the fuel. It may have been folklore, but that's why I went to 20:1. At one time, I think folks ran 24:1 more commonly. Quote
locogato11283 Posted April 26, 2016 Report Posted April 26, 2016 There was some information passed along by someone long ago that 20:1 made more powa on the dyno. Possibly due to the BTUs that the castor component adds to the fuel. It may have been folklore, but that's why I went to 20:1. At one time, I think folks ran 24:1 more commonly. That was done by Andy at M&M. Quote
J-Madd Posted April 26, 2016 Report Posted April 26, 2016 I too thought it came from Calvin. Calvin always liked a castor blend for other reasons as he thought it provided better protection from nikasil wear. As opposed to non castor blends such as redline oil. I'd bet Menz made back to back dyno runs with redline vs. supertechniplate. He tested EVERYTHING. When he quit, he was running supertechniplate. Quote
n2otoofast4u Posted April 26, 2016 Report Posted April 26, 2016 As I recall Calvin and Garrett (might have been another builder) did some testing and it showed no ill effects on HP until they exceeded the 20:1 point. Once that was know it was too easy to just buy the bottle, rip the top off, dump it in the can, and fill with 5gal of fuel. Quote
JTmachining Posted April 26, 2016 Report Posted April 26, 2016 I use 20:1 oil to alky mix with Redline alky oil. I like it Quote
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