DD6V92TA RPM's

[Eagle]

Have a 6V92TA  with Allison HT740 Automatic transmission in an Eagle 10 found air leak at the governor regulator gaskets and fixed the air leak and the RPM's are set at 2100.  With the air leak I could go to 2400 RPM's.  This sure makes a big difference in power and etc.  What are your suggestions for raising the RPM's up some.  What would the maximum that you think I could go and how many washers should I remove?

[RJ]

The factory recommends 2100 rpm.  Higher settings = shorter engine life.  Your choice.

If you want more power, change to 9G90 injectors and the corresponding turbo (Can't remember the scroll ratio at the moment) to bump your 6V92 up to 350 reliable hp.

FWIW & HTH. . .

[TomC]

Theee fastest you want the 92 series to go unloaded is 2400rpm-92's just don't like rpm.  Get your air leak fixed so you can get full governor opening.  Pull one of the valve covers (only two bolts) and see what injectors you are running. If it is stock, probably 80's.  You can go to 90's with the automatic. If you had a 10spd, you could go to 100's-automatic would lug the engine too much for 100's.  With 90's you'd get 350hp and 1050lb/ft torque, compared to 285hp and 930lb/ft with the 80's.  Good Luck, TomC

[Eagle]

Tom I have the air leak fixed the RPM's are at 2100 now.  I have 9G90 injectors installed with a new turbo with an AR of 1.23.  The coach seemed to perform much better when I had the air leak and the RPM's would go to about 2400.  I guess I had better leave it set at 2100 RPM's.

Thanks for your response.

[DrivingMissLazy]

I kept my 8V92 set at 2350 for 15 years and 150,000 miles. Although there a a lot of old wives tales about the higher rpm's hurting the DD's, I have never talked to anyone that actually experienced engine damage due to a little higher rpm. I made many cross country runs running well above 2100 most of the time.

Since you are not an over the road trucker wanting millions of miles then a couple of hundred extra rpm will not create any problem for you in my opinion. If you want a million miles out of it, then keep it down to the 2100 range.
Richard