Carb tuning, accelerator pumps.

On my street/strip 340 (4.30's/4200stall/.590 solid cam) we ran an 850DP which was 2/10ths quicker in the 1/4 than a 750DP, it was ok off the hit, no stumble but felt a bit weak so we installed a 50cc front pump, pink cam and 35 extended shooters, was noticeably stronger on the hit and you could feel the difference on the street as well.