I have just installed my quadzilla in my 2000 excursion with a 2002 24v Cummins. I have rv275 injectors and a he351 turbo 47re transmission. What tune would be a good “start” to keep egt under 1200 or so while towing a 7500lb trailer? 
 

 

On 6/30/2020 at 1:50 PM, Mikeamyers30 said:

I have just installed my quadzilla in my 2000 excursion with a 2002 24v Cummins. I have rv275 injectors and a he351 turbo 47re transmission. What tune would be a good “start” to keep egt under 1200 or so while towing a 7500lb trailer? 

 

Turbo is too small on the exhaust side 9cm2... (60/60/9) This will spool fast but create quite a bit of heat. 12cm2 housing would breathe better. Your running the same turbo as me but the exhaust housing is smaller. 

 

RV275 is basically a stock injectors of ISB motorhome edition. So any stock tune would work. 

 

The other heat issues is only a 4 speed transmission. If your running any oversize tires or lift this is another heat creator. Typically over size tire lower the final ratio and add stress to the drive train.

• +150 HP DAP injectors 7 x 0.010 popped at 320 bar
• HX35/40 Hybrid (60/60/12)
• 245/75 R16 tires (30.5 inch tall) makes the final ratio 3.69:1.
• 5 speed transmission, with the tire combo I'm in 4th gear by 25 to 30 MPH.
• 31 foot Jayco Eagle 8,020 pound trailer, 17,300 pounds GCW, total length 62 feet...

14.7 MPG high mark, 12.6 AVG MPG. Ran Quadzilla on kill all the way to Arizona and back to New Meadows ID no problems with EGT's. Only transmission temps.

 

Edited July 2, 20205 yr by Mopar1973Man

I did not note any difference in EGTS with the VE when manually setting the vanes from 9cm to 18cm while cruising.  For whatever that is worth

 

 

there are varous tunes inthe downoload area.  any of the small injector tunes. 

Only reason I mention it I'm running rather border lined. 7% grade and floating 1,100*F for 20 miles does create temperatures. Difference between a 9cm2 and 12cm2 come to show better on long grade. 

On 6/30/2020 at 1:50 PM, Mikeamyers30 said:

What tune would be a good “start” to keep egt under 1200 or so while towing a 7500lb trailer? 

Since the OP was mentioning towing at least 7,500 pound trailer which al very close to my 8,020 pound trailer.