Lets start before the cam,02z28 a4 st3500,asp,grots,dual cutouts,lid,lca's,phr,subs,323's,26x10x15 ETdrags,3450 race weight.(1.51)60ft,11.56@114.9mph @75 degrees.After cam(F4)226-226,574-574@114,comp 7.4 pushrods,918's.Cam installed dot to dot.car is about 100#'s heavier,(1.68)60ft 12.00@111mph @ about 85 degrees.the car was dyno tuned at norris motorsports.ran good for about 2 days then would not stay running.The guy was nice enough to drive out to re-tune.Again ran good for 2 days,then started to stahl.So I tried someone else,same results.The car seems to load up every once in a while,throw a code and the light goes out.