Hmm ET's are more based off the first half of the track MPH is a guage of how much power your putting down. Your MPH seems almost unchanged. Any way you can list your old best time slip with the new one?Also it has been said the stock intake mani gaskets are crap and leak easily you may be leaking a little at the top? But 12.2 is awsome i think you could be better based off your old best MPH =)