ok. does it feel like this right after or right before the shift. i bet it is right after the shift. if it is then it is torque management that is hitting you. if it is chirping the tires and is stock without a tune then it is pulling timing after the shift.

 

it will pull great then just stop,like you hit a wall valve float is beautiful

 

what kind of programs will program out torque management

 

it actually feels like it is right before. its got the nice flowmaster rumble til like mid to high 5k then the noise changes...you can barely hear the muffler anymore. i dont know, could be nothing maybe the sound of everything spinning is drowning it out. at first i was thinking that the engine is trying to push more through the pipe than it wants to allow. maybe you could visualize it like this: you've got a flowmaster on it till like 56-5700 then a magic genie sticks your stock exhaust back on it until it shifts. it seems that dramatic. truck seems to be pretty much running ok, it just seems weird to have the exhaust note change like that. well, whatever it is i appreciate yall helping me. any more ideas or if you just want to throw rotten fruit at me for this thread then thats cool. thanks for the help guys

 

that is just what happens.sounds like the truck is losing power but is not.my 90 silvy did the same thing.it is normal

 

I haven't floated 'em since I had the 71 Dodge...around 5,800 (on a 5,500 rpm engine) and power vanishes until things slow down enough to start working again.

 

You just want to be careful not to float your valves. I don't know about the 5.3 but on my old 355 I floated them one night racing a 93 cobra and ended up bending 2 push rods.

 

ok then that sounds like valve float. but i would sure try to tune it first. but that does sound exactly what mine was doing when i was having spring problems.

 

ok, so how hard is it to change springs on the heads. would you suggest changing rocker arms, valves, cam(any one of these or all) at the same time i change the springs. also, would you change the pushrods too. help me to learn guys

 

I've heard that stock springs are very weak and fall out of spec for high RPM duty surprisingly quick... something like 20K miles.

I accidentally over revved an old Olds 350 of mine. What happened with me: engine went completely flat, like fall on your face flat, exhaust/intake noises change tone, and there was a fair amount of clatter. No damage though.