i have a stock 5.3 motor right now, just hypertech programmed. i set the limiter to 6300 and the shift point to 6200, it screams that high in second gear, but it actually makes a BIG diffrence. Any one else do something like that?

 

I shift @ 6400 and limiter is set at 6800 rpms but i'm not quite stock

 

According to the hp/tq numbers of a factory 5.3L peak hp is made at 5200RPMs. I have mine shifting at 5800RPMs (approx 38mph on 1 - 2 shift) and rev limiter set at 6000RPMs. I've played around with the shift points setting them higher and lower and setting the shift points 5800RPMs is where I get the best 1/4 mile times.

 

i shift at 6500-6600 but im not a 5.3 anymore

 

stock 5.3 with cam-6800, rev limiter set at 7300

 

when yall say you shift at those rpm's, do you mean youre manually shifting your automatic? and isnt that very bad for it?

 

computer is set up to shift there, hello allen nelson lol.

 

I shift at 6100 no clue where my rev is set lol.5.3 just bolt ons no internal work yet....

 

It's not bad to shift it manually. It won't hurt anything. I do it from time to time.
Get that damn Nelson Tune already!!!!!!

Jim

 

5200 with a stock tune probably. A custom tune will allow the engine to make more power up to 6000-6200. Though that's about it.

Jim