Comp cams xe268h for 318

dartfreak75 said
My truck is like that. Stock 2001 5.2 5 speed except mine is like that In the middle range. Like it is pretty strong in first sec then when you get to third nothing you can hold it to the floor it makes no difference. Then as you get up in speed more the top end has pretty good throttle response. If I'm going 60 to 70 I can hit 90 quick but 45-65 takes forever no throttle response at all

I'm gonna guess that your '01 truck has a locking TC in top gear, and your drivetrain is simulating a manual trans when you go to top gear (probably an OD gear): i.e., the locked TC won't allow the engine to rev to a better place on the torque curve. You 'fall off the torque curve' a bit, and coupled with the top gear's gearing, it is 'flat' in that 45-65 mph range. (And that is with a 5.2 Magnum engine that has a static CR that is 0.5 to 0.75 points higher than the '83 LA 318 engine and a roller cam with a profile that I'll bet is much more like the shorter duration Voodoo's or XE's than the Summit 6900.)

Just translate that into moving off from a stoplight in 1st gear with too low of a DCR. Do it again in 2nd gear unless you revved it in 1st to 4k RPM, and manually upshifted. To fix, you raise the DCR or put in a higher stall TC. The higher stall TC hurts fuel mileage, adds wear & tear, and you get tired of manually 'optimizing' the shift points in everyday driving. It is a lot easier and nicer to drive when the low DCR is fixed instead, fuel mileage is a good bit better (I computed it out and the $137 for a Voodoo is paid for in around 5k miles), etc., etc., etc.

Sorry to go on so much LOL