If you think 3000 is crazy you should hear them at 3800. Thats as far as mine will rev.

 

i know mine will go 119 on gps. with 35's and the trusty nv5600

 

nv5600/4.10 combo will get you about 2100rpm@70mph.

 

With my 410s I think I recall being at around 2450 for 75 mph... does it drop that much @ 70 mph (2100?)

 

2400 rpms is about right for 75mph. With the 3.73 mine is around 2200 rpms with the stock tires.

MikeyB

 

G56 + 37"s = >120mph

 

[QUOTE=PsychoRallye;1880604] What RPM is redline with the **** thing? I felt like the engine was about to blow up at 3000 RPM !

QUOTE]

The Cummins will run for years at 3000 rpms.

 

Anyone have part numbers?

 

A NV5600 with 4.10's turn essentially the rpms as a G56 with 3.73's...

 

3800!!! Wow, you guys are scarin' me. We had a cummins genset blow sky high at 3800 when the motorman lost his grip on the govenor. He didn't need a haircut for months.

Cya

 

I'm trying to get a program so I can turn 4k. Given you will need a few mods to turn that but the cummins can handle that no problem. The only thing that sucks is that when you rev up that high it will stay there for a few seconds to get rid of the extra fuel. Kinda scarry but it saves the turbo when pulling as you don't get as much turbo bark.

 

Try cruising at 3k RPM. It should really be smooth.

Accelerating to 3k may sound like it's going to "blow up", but staying at that RPM is really smooth.

 

I checked into it and from what I found it is cheaper to change axles gears......

 

10-4 on that. I’m looking at the G56 service manual and it says the only items serviceable on the countershaft are the bearings. 6th gear on the main shaft looks easy to replace, 6th on the countershaft looks easy too, but it is on a non-serviceable shaft assembly.

I guess you’d have to buy 6th for the main and the entire countershaft. I’m thinking this would be expensive, plus you’d be meshing new gears with old. I guess buying the GV OD wasn’t a mistake, lol.

 

I find that towin heavy with the nv there seems to be a "gap" at around 60mph, to high for fifth and low for sixth