Safe RPM

[Vasbinder]

What is a safe RPM that you can turn up a stock LB7. Before it lets loose and what would let loose.

 

[03 D-max]

i Believe the valves start to float at 4000 or 4200 rpms. My hot pulling tune shift at 3800

 

[gmduramax]

stock turbo I wouldnt go over 3600. stock motor I wouldnt go over 4000

 

[TrentNell]

I have reved to 4200 before testing tuning with out issue but ran slower on anything above 3600-3700 only safe bet is to keep it below 3800 , and as stated if you have a stock turbo no sence going above 3400-3500 rpm it wont make good enough power up there to be worth reving .

 

[05smoker]

It won't make any more power, but it will turn 4500 without issue stock. Been done. Ask the 6 speed guys what they leave the line at when they pull.

 

[super diesel]

If your using stock valve springs, they loose about 1/2 there strength after about 30K from what I've seen. Big RPMs and this would scare me.

 

[05smoker]

What are you looking to do with the truck?

 

[bonescarolfi]

I've got mine shifting at 3650. I've hit 4000 pulling which is where I've got the rev limiter set at but that was with almost no traction. Usually it hangs between 3300 and 3600 which as stated above is about all the stock turbo has in it.

 

[ecc_33]

I've turned 4850 numerous times. My rev limiter is set at 4700.

 

[Vasbinder]

Going to use it for every thing.It's the main driver

 

[921500Z71]

Ive gone 4k a number of times but I like to keep it shifting around 3500-3600. No issues motor wise....yet

 

[othrgrl]

I agree that going over 3600 on a stock turbo is pointless abuse to your motor. With stock valve springs I wouldn't recommend going over 4000.