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come to find out the dig 6 is not recommended for alcohol/methanol and anything over 11:1 compression so that may be the problem.

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Quictree, I have been running a Digital 6 Plus for 5-6 years. First with a 11:1 451 ci. then 451 12.7:1, and now 493 ci 13:1 no problems.

A couple years ago with 12.7:1 451 ci, had a similar hiccup when I would hit the throttle VERY fast while on 2 step. It was at the begining of the season when the air was cool And dry. This was with a converted 950 HP (4150) I put a 50 cc pump on the front and staged @ a warmer temp, cured the problem.
I have been using a 3 circuit 1050 Dom. which is probably richer. Havent had that problem.
Hope this helps, Don

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thats what MSD said mine does comong off the 2 step not going on. it is at full throttle

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I misunderstood you.
Mine would do it when staged I see the top yellow come on whack the pedal to the floor.
I think the 50cc pump help cover up the gulp of air when I slammed the throttle open. If it didn't stumble there was no problem with the run. Don