A question for the alcohol racers:

At the end of the event when you run your engine griefly on gas and MARVEL, how many ounces of oil to five gallons of gas?

Too little and too much would seem to be less than optimal!

DG

My engine is duel fuel and when it’s on gas the rear 3 gallon tank is filled with 93 pump with nothing in it. Most times the 93 is 10% ethanol because of my location. End of year I switch it to 93 non-ethanol the last couple of races. I can easily go through over 3 gallons of 93 pump during a weekend.

At year ending, I flush the methanol from the EFI system and fill with 93 pump non-ethanol with 1 oz of Klotz Uplon per gallon. Change the fuel map in Holley to run on gas to flush injectors. Reverse process in spring start-up.

I’ve never used MMO, but have/do use Sea Foam and think it’s a good product.

How are you switching from fuel to fuel?

quote:

How are you switching from fuel to fuel?

Yes David, how are you switching fuel to fuel???

At the end of the race, we will completely draining the methanol from the ProCharger fuel tank.

We will add a gallon or so of a mix of VP C16 race gas and MMO [amount = TBD], start the engine off the remaining methanol in the float bowls and run it for 30 to sixty seconds or so to "pickle" the entire fuel system with the gas/oil mixture.

We will then drain: float bowls, fuel tank, fuel lines, etc. before loading up to go home.