Sam Wilson
Rating: N/A
Votes: 0 (Vote!) | | Posted on Tuesday, April 11, 2006 - 11:22 pm: | |
Has any one installed a M 11 in a 05 Eagle I have a v892 the rear seal leaking and I want to upgrade and I know nothing about the M11 and I have a few questions do you raise the rear floor and I was also told you could use 740 transmisson with this engine.thanks for any imput you can give |
Jim Shepherd (Rv_safetyman)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Wednesday, April 12, 2006 - 8:59 am: | |
Sam, you are going to get many replies that suggest you fix the 8V92 and be done with it. I believe that will be the most cost effective approach, assuming that the engine just needs a seal and is in generally good condition.
The M11 (and ISM) engine is a popular swap in an Eagle. You will not need to raise the bed. However, you will need to do a ton of work to get the job done. You will need all of the plumbing converted (air/exhaust/water), motor mounts, engine control cable (perhaps 20 wire bundle), and a ton of other modifications. The HT740 will work fine.
In my mind, the biggest issue is the gearing. The two strokes can run all day at 2100 RPM. With 3.73 rear end and typical bus tires that is 70-75 MPH. Four strokes like to run at 1400-1600. That is the best torque and efficiency range. That is why folks get some version of the Allison World transmission (has two overdrives) or a mechanical overdrive (like my Eaton Autoshift). The overdrive puts the engine into its sweet spot at typical cruising speed. There are no Eagle ring and pinion gears that will get into the correct range. On the 10 model (and I think the 05 as well) you can get 3.36, but you really need something like 2.9 to put you in the correct RPM range.
I often say that an engine conversion is not for the faint of heart. You can see what I went through with my Series 60 conversion (same issues as the M11 except I had to raise the bed)-- see link below. If you have someone do the job, you are looking at a cost of $25-30K. If you do it yourself, you are going to have out-of-pocket costs of around 50-70% of that value.
If done correctly (with the correct gearing), you would love your engine conversion.
Jim Shepherd
Evergreen, CO
’85 Eagle 10/Series 60/Eaton AutoShift 10 speed transmission
Bus Project details: http://www.rvsafetysystems.com/busproject.htm (updated 2/9/06) |