I just re checked and I went to 6.40 with the M1. There's even more to the story if you're interested. The 6.31 was with a Torquer and a 750 alcohol DP. The air gap also had the same DP carb with no changes. The M1 that picked up massively over the air gap was with 98 octane pump gas through a Holley 870 Vac Secondary running fat as. The change from Methanol to Pump gas has killed my MPH from a previous best of 113 to 108 MPH over the 1/8th.
