Quote:

Thanks, man I hope it that simple! it would make my year!



You jetted up... did it pick up speed... if so, keep
jetting up.... it could be your springs, the hyd cam
springs dont like rpm much above 6000(too light to handle
the weight).... we had this same problem(my buddies ford
pick up) last week during the Hot Rod Drag Week, we
tightened the pre-load some and it helped a little.
Also you jetted the front 2 jet sizes and the rears
4 sizes... try going up the same amount on each
(if you were in the ball park)




It didnt pick up at all....the reason I staggered it front to back so much was because it still has a 3.5 PV up front. I started at 76/82 and ended up at 78/86 and it did not pick up or slow down for that matter. I couldnt run anymore than 32-34 degrees of timing either, i put in 38 and it seemed to hurt it and dropped 2 mph...I've been going over the timeslips and i'm coming up with more ideas. The current cam is ground on a 108 and manfu recommended installed at 104...the old one was ground 108 and installed 106. could this new cam be building more cylinder pressure causing me detonation problems? I have no real numbers but the TRW's are approx 18 thou out of the hole and i'm using a 40 thou fel pro, the heads are 308's with maybe one or two clean up cuts on them...where's my comp ratio most likly at??? With the old cam and no other changes i could run 40 degree's or timing on 93 octane