Power Boost chip for 300 HP Cummins

good dogs wrote:
Good point. Already have an overheating problem and that's something else we'll be looking at. I cleaned the radiator fins last year and that helped.

You may or may not be able to reprogram the engine for more power. Depends on exactly how your engine is set up, and what the tranny rating is behind it.

HOWEVER, you say right here you ALREADY are marginal on cooling capacity, and, in fact, have already had heating problems with the hp you now have.

MORE HP means MORE heat generated.

If you increase the HP, you WILL generate more heat. What is your plan of action to get rid of that heat? Bigger radiator? Aux. fans?

If you increase the HP, without controlling cooling, you will get 1/2 way up Donner faster, but lose it all sitting on the side of the road, trying to get the temps down!

good dogs wrote:
Thanks all for the suggestions.
I called the nearest Cummins shop and got a curt "We don't do that."
Called my local Freightliner service shop where we get the annual checkup and the tech offered that "if the computer would allow it" he could reprogram for a $65 fee.
That's a pretty cheap start so we'll try that.

So he said "if" and Cummins said no. So did Cummins mean it can't be done or they won't do it? Because the cummins by us will install add ons too engines to get more hspwr, leaving me to believe it can't or "shouldn't " be done to keep the engine in a safe running environment.

I'd be leery of the other guy saying "if" it could he'd do it for $65. To me it sounds like that'll be the charge even if it can't ( which probably can't as the Cummis guy told you). Give them you VIN # - they should be able to tell you before you pay out the money.

Good point. Already have an overheating problem and that's something else we'll be looking at. I cleaned the radiator fins last year and that helped.

In addition to xmission capacity remember that higher hp will generate more heat, so before you bump up the hp too much be sure your cooling system can dissipate the load.

Lou
05 Travel Supreme Envoy

Thanks all for the suggestions.
I called the nearest Cummins shop and got a curt "We don't do that."
Called my local Freightliner service shop where we get the annual checkup and the tech offered that "if the computer would allow it" he could reprogram for a $65 fee.
That's a pretty cheap start so we'll try that.

Sully2 wrote:

Passin Thru wrote:
John Wayne, I'd like to see proof of that statement because they use the same Allison in heavy trucks pulling 80,000 lb.

No they dont either!

So right. The chassis builder would not have put a tranny capable of pulling 80,000 lbs in this MH. as stated Allison makes many different trannys I will bet the one in this MH is sized for this rig. You may be able to increase the torque and HP but make sure you know the capability of your set up. Many years ago I made the decision to take my 230HP Cumin's up to 300 hp. In doing so we made sure the MD3060 could take the increase.Remember on any Chip increase you must also concern yourself with monitoring your EGT's

John Wayne wrote:
Well Just passin thru I just checked the Allison web site and they have 9 transmissions listed for Motor Homes with torque ratings listed from 575 to 1950. So depending on the transmission you have you are limited by torque. So I stand buy my statement even though I not a Master Mechanic.

High 5....Time 2

Passin Thru wrote:
John Wayne, I'd like to see proof of that statement because they use the same Allison in heavy trucks pulling 80,000 lb.

No they dont either!

Well Just passin thru I just checked the Allison web site and they have 9 transmissions listed for Motor Homes with torque ratings listed from 575 to 1950. So depending on the transmission you have you are limited by torque. So I stand buy my statement even though I not a Master Mechanic.

The ISC 350 Cummins in my 2003 DS would not accept a simple reprogramming when we had the computer hooked to it. It seems that some will and some won't. At about 35,000 lbs loaded and towing the performance is adequate, but as with many others I would gladly accept more power, I just didn't want to spend a lot of money to get it.

If adding performance to a diesel engine is important to you as an owner the mention of Pittsburgh Power is an excellent suggestion for a company that is extremely good at doing the upgrades needed, from mechanical changes to computer upgrades. They are not inexpensive, but they are very good.