00Silv4.8

iTrader: (10)

I shift at 6800 on a stock 4.8 with a 220 cam. Talking with Nic D and the guys at AZ dyno chip, they been turning stock bottom LS's at 7k for years now without catastrophe.

Bumpers

iTrader: (10)

I've shifted a 5.3 and 6.0 at 6500 without a problem.. I will go alittle higher with a bigger cam one of these days

double047

iTrader: (15)

What they said.

6200ish stock cam, 6800ish bigger cam.

00ChevyScott

iTrader: (10)

I think the highest I'd spin mine is 7200 stock. But I don't know how often I'd do it. Corey spun his 4.8 up to 7000 plenty of times at the track.

1slow01Z71

iTrader: (36)

Hell back in teh day 01Thunder bounced his 4.8 off the rev limiter at 7200 a couple times at a couple different dyno days. I think the 4.8s live so well due to the short stroke and decreased rod angle. Plenty of people tickle the 7K mark all the time. My LQ4 shifts at 6600.

grey matter 04

iTrader: (9)

no need to spin it 6700 if the cam stops pulling at 6300
Want to know how high you can efficently spin it pay for dyno time and have it retuned

4doorsssilverado

I'm shifting at 6750 on my crew cab 5.3 w/219/224 cam been doing it for about two years already no problems yet.

jrmchevyman

I agree with this guy, it all depends on your cam and setup. No need to set it higher than what your cam actually needs so take it to a dyno if you are unsure.

With my setup and tsp 220 cam mine is set at 6400 in normal mode and 6500 in tow haul mode.

If you have a stock 4l60e and a small *** cam no need to shift at 6700rpm either lol. If you want to shift relatively high you better have some type of built tranny also.

The most I would personally shift at would be 6750 with a stock engine (bottom end) and that would be with like a tsp228r or similar, I know a few guys that run 6750 no probs.

Blown06

iTrader: (32)

Mine sees 7500 in the water box on a regular basis. 7000 on the shifts. Bored 5.3, stock heads and 224/230 cam.

grey matter 04

iTrader: (9)

You can spin it 7000 if you have enuff cam and intake to do so...cross your fingers hope the rod bolts hold!
If you dont have parts that are efficent at 7000 no need to spin it that high....PISSIN IN THE WIND!