Basic Enderle Barrel Valve Leakdown and Butterfly Settings

8 Stack: The smaller the engine the less % of leakdown the larger the more leakdown % Unblown using Gasoline 8 Stack: .004 in Butterfly gap 10% to 13% leakdown % Hilborn-Kinsler-Crower-Engler Use a #57 Spool in Hilborns- Enderle Square Valves run badly on Gas - Change it to a Hilborn BV Methanol 8 Stack: .002 in Butterfly gap 18% to 28% leakdown % All Popular Injections use a #54 Spool in Hilborns & a #21 Spool in Englers Ethanol 85% or 90% .003 in Butterfly gap 15% to 20% leakdown % Applies to all popular 8 Stacks ================================================================================ Bug, Bird, Buzzard, and Big and Ugly or Upright with Square or K Valve: Unblown: Gasoline – .005 in Butterfly gap 12% to 15% leakdown % Enderle runs Badly on Gas- Call us for Tips 615-457-3192 Unblown: Methanol – .005-.006 in Butterfly gap 28% to 34% leakdown % Larger the engine the more Leakdown % - If using a Engine Leakdown Tester read it backwards Unblown: Ethanol – .005-.006 in Butterfly gap 18% to 25% leakdown % (more % for E-98) Single Butterfly throttle bodies will like .008” gap, sometimes even .010” same leakdown % ======================================================================================= Bug, Bird, Buzzard, and Big and Ugly or Upright with Square or K Valve: Blown Gas & Ethanol to 85% – .010 in Butterfly gap 30% to 40% Leakdown% Blown Methanol and 98% Ethanol .010” Butterfly gap 65% to 75% Leakdown (I didn’t stutter) Blown Nitro above 50% – .013 in Butterfly gap 75% to 85% Leakdown ====================================================================================== Tips: Buy our Leakdown Tester so you won'y run the risk of using one that reads backwards- AD-Leakdown - Butterflies larger than 4-3/8 in Don't try to make it run on GAS - Use 6 oz of toluene in Gallon of Gas for a much improved idle and less black smoke - Enderle quare Valves - #32 Unblown #12 Gas-E85 #17 Blown Alcohol Best Fuel- Methanol Next- E-85 laced w toluene - Worst- GAS