LB7 max hp/torque

[Vmyrhaug]

on stock internals.
only by changing parts on outside of enginge, what is the max hp/torque the lb7 can handle without breaking. yes, i know it's possible to kill it while stock..
but what is the biggest hp numbers on stock internals and still going strong?

and what is done to make the hp?
twin turbo?
lift pump?
efi?
cp3?
injectors?
intercooler?
piping?
exhaust?

sorry for my bad language, still a retard from norway:roflmao:

 

[hondarider552]

Not trying to be a mood killer but use the search feature. :thumb:

 

[Dirtymaxx03]

600hp 1200ft/lbs will live for a little while...

Its not if you bend the rods, its when...

a larger turbo and some hot tuning can get you to 600hp as long as your stock cp3 can keep up.

 

[nate.mchugh1986]

Bump

The search is good but it takes you out of the forum and back to Google, it's irritating but it is useful.

 

[roxyfever]

Lots of info on this and parts. But to answer your question anywhere from stock to 600. Depends on parts, tuning, driver

 

[Bonestock]

I have had 3 of them that have been @540-550hp for lots of miles without failure. I have 1 right now with 240k on it and the last 115k has been @ 544hp.

My previous one my neighbor owns and has 215k on it and the truck has run @ 548hp on multiple dynos since 149k. Its all risky business but I guess I am lucky in this regard. When they break they will get fixed lol.:thumb:

 

[DURAMAXD219]

Just throw all the things at it like me and wait for d-day lol

 

[fast03]

Mine was 550-575 with 180k on the clock. pretty sure the rods were a little shorter when I sold it. BTW it was tuned since 40k miles

 

[Stancedlb7]

700hp maybe 750. But that's huge charger, high rpms, perfect tuning, and most importantly lottery winning luck. Want a budget build just take some lbz rods and shave the caps. Shouldn't be to much of a problem hitting 700.

 

[Bustedknuckles]

Im at 198,000 miles. Been tuned for the last 60k at least. S366, 30% nozzles, built trans and supporting mods. So far so good, about to do a modded cp3 and we'll see what happens.

 

[Stancedlb7]

Im at 198,000 miles. Been tuned for the last 60k at least. S366, 30% nozzles, built trans and supporting mods. So far so good, about to do a modded cp3 and we'll see what happens.

I say about 600hp before the modded cp3.

 

[Vmyrhaug]

How will the twin turbo setup work on 500whp?
Lower egt's? Spool UP? Safer engine?
What is the safe limit on egt's?

 

[Bustedknuckles]

I say about 600hp before the modded cp3.

Best its ever dynoed is 520

 

[Awenta]

How will the twin turbo setup work on 500whp?
Lower egt's? Spool UP? Safer engine?
What is the safe limit on egt's?

Yes it will lower egts but a big single is safer than twins.

Sent from my SM-N910V using Tapatalk

 

[Chevy1925]

How will the twin turbo setup work on 500whp?
Lower egt's? Spool UP? Safer engine?
What is the safe limit on egt's?

Keep the twins at 500rwhp and you will be fine.

You need to keep at or under 1200ft lbs. Hp isn't really the concern as much as torque is.

 

[TheBac]

Keep the twins at 500rwhp and you will be fine.

You need to keep at or under 1200ft lbs. Hp isn't really the concern as much as torque is.

The only sane advice given in this thread. ^^^^

Id keep it at max 525hp if you want it to live a relatively long life.

 

[Vmyrhaug]

is it hp/torque at the wheel or engine?

 

[TheBac]

We usually talk about whp here.

Keep in mind, some live at higher hp for a little while, but most dont. Anything over 550, in most cases, youre starting to take a risk. LB7 rods arent the best.
Im leaning toward the conservative side due to where you live. Parts will be hard to come by and expensive to get if you do have problems or blow the engine up. If you want to push it though, by all means have at it. Just know the risks.

 

[Dirtymaxx03]

I'll say if i was gonna do it again, with a stock motor, i would have kept the stock turbo and just had fun with 500ish rwhp.

 

[DAVe3283]

I say about 600hp before the modded cp3.

Best its ever dynoed is 520 ��

I dynoed 525 HP on a 275k mile stock CP3 with a S371 turbo and Industrial Injection +60% injectors. That pump was completely tapped out to hit that number, though. And "only" 933 ft-lb.

The low torque is the key. Ran my motor with 525 HP / 933 ft-lb for quite a while, and when I pulled it apart to get built, everything was straight!

I'll say if i was gonna do it again, with a stock motor, i would have kept the stock turbo and just had fun with 500ish rwhp.

Heck, as much fun as the setup above was, I think the most fun & peace of mind was with the motor completely stock and a 425 HP EFI tune. Ran freaking awesome, no smoke at all, could smoke the tires when I wanted (small tires, but still). Here I am with another $20k in the powertrain, and all it does is make it easier to break drivetrain parts.