I ran my car last Thursday thru Sunday for the first time this year. Over the winter I had my converter made spragless and that was the only "change" made. Other work was done but none of that SHOULD have changed the performance. SHOULD is the ticket there......LOL. Two different tracks, both well prepped, in decent air, new tires, and I have alot of past data from both tracks. So the car is a dog now and won't sixty ft like it was. It would go 1.20 last year, now 1.24. Stall is the same, converter man says the spragless can't slow down the sixty ft. So my question is, Can going spragless hurt the sixty or not? Everything else seems fine but if you guys agree with my converter man, I got to start digging for a problem. The car was deadly consistant, I qualified #1 but used alot of NOS to do it.