Nige
Senior Member
Personally I wouldn't consider going up in BHP by 35%+ (290->400+) unless I could find information that would satisfy me that the rest of the power train was capable of handling the extra oomph.
-
Thank you for visiting HeavyEquipmentForums.com! Our objective is to provide industry professionals a place to gather to exchange questions, answers and ideas. We welcome you to register using the "Register" icon at the top of the page. We'd appreciate any help you can offer in spreading the word of our new site. The more members that join, the bigger resource for all to enjoy. Thank you!
Swap Cummins M11 for 3116? Military FMTV M1088 tractor
- Thread starter Brit
- Start date
Brit
Member
Trans is an Allison 3070. Meritor RF611 axles. Total load will be around 10k pounds (an RV conversion) . I'm just looking for more power to get through the mountains wherever, in the US.
Birken Vogt
Charter Member
I always say, I'm on vacation, what is the hurry? And it goes down the back side of the hill, and on the flats, the same speed no matter what engine is in it. A lot cheaper to just put something common and affordable in there and leave it alone, also. 3070 is good for 300-350 HP if memory serves.
RZucker
Senior Member
If you're not running maxed out on the GVW and staying fairly light, you can run any HP rating you want. But I know from experience that a 320-350 HP engine can run a 50k+ truck around pretty well.
repowerguy
Senior Member
- Joined
- Mar 18, 2015
- Messages
- 810
- Location
- United States southern Ohio
- Occupation
- mixer truck mechanic
Not without a lot of work. 250-275 hp is doable all day though.
DMiller
Senior Member
HP is fine if utilize it, your quoted weight that may never occur unless add a heavy trailer behind with a heavier load on it as the electronics will only deliver as needed(Backfeed) not as demand(foot pressure).
Birken Vogt
Charter Member
RV engines get much higher HP ratings than comparable truck engines since they know you are not going to use it continuously and melt the engine down. But a lot of the hard parts are different, pistons, cam, fuel injection components and turbocharger might all have to be changed along with ancillary stuff.
DMiller
Senior Member
Used to really enjoy the braggard Truck Herders, "Put a 400 pump on my 300, Runs like it should now" They had ZERO clue and had no concept how the mechanisms worked. I doubt the person that sold them that even knew any better. Was always a tattle when a New Herder got into one of the old external Aneroid trucks, headlamp trim ring screw would be missing, so they get into a newer set up they would cry the blues trying to get someone to tell them how to add more fuel. The rub marked bent back throttle shaft cover plate was enough to tell THAT tale where they invariably got that incorrect as to adjusting for More fuel.
RZucker
Senior Member
Got a 3406B in the shop right now that had a "Custom uprate" done on it. Has a 12" crack that wraps around the rear of the block just above the rear main saddle.
Gee... I wonder what caused that?
Gee... I wonder what caused that?
DMiller
Senior Member
Did not call those Custom Uprates but Custom Modifications!!
Spud_Monkey
Senior Member
Might look at your axle ratio before swapping engines for so much power on what you are trying to do, more hp equals more fuel burning unless you are maxing out the hp in your current rig which I highly doubt at only 10k lbs.
Besides the major mountain range grades like Cascadia or Rocky mountains I'm cruising most steep grades at 55 mph without the rear axle split with DT466 mechanical engine rated for 210 hp. Also have yet to screw around with turning fuel up, bolting on bigger turbo or adding intercooler. Anywho besides DT466 I run a 4:89 ratio rear with splitter (I just got fixed and haven't used yet) and this is a RV conversion itself weighing in at 15k lbs empty towing behind a 3500 lb Subaru, 4000 lb camper on the back, couple thousand pounds worth of tools and 300 gallons of diesel.
Attachments
Brit
Member
425 hp max I believe
RZucker
Senior Member
I'm seeing up to 370 HP (diesel) on the Allison website.
Brit
Member
3000 Series - allisontransmission.com
The 3000 Series includes close or wide ratio gearing and a maximum rating of 336 kW (450 hp). The addition of 5th Generation advanced electronic controls enhance operation and prognostics capabilities. An optional integral output retarder for better vehicle braking and reduced brake wear is also offered.
Brit
Member
Nope. You are reading an incorrect quote from a rebuilder.
3000 Series - allisontransmission.com
The 3000 Series includes close or wide ratio gearing and a maximum rating of 336 kW (450 hp). The addition of 5th Generation advanced electronic controls enhance operation and prognostics capabilities. An optional integral output retarder for better vehicle braking and reduced brake wear is also offered.
RZucker
Senior Member
Nope. You are reading an incorrect quote from a rebuilder.
3000 Series - allisontransmission.com
https://www.allisontransmission.com/en-gb/transmissions/models/3000-series
The 3000 Series includes close or wide ratio gearing and a maximum rating of 336 kW (450 hp). The addition of 5th Generation advanced electronic controls enhance operation and prognostics capabilities. An optional integral output retarder for better vehicle braking and reduced brake wear is also offered.
Wonderful... What's your point? Without massive rebuilding I doubt you will jam 450 HP in that truck. Try to think realistically. A 300 HP 3306 will push a 56,000 Lb. mixer truck down the road and up the hills just fine. If your going to max out at 30,000 (maybe).
A 6V-92 Detroit at 335 HP would turn that thing into a race car.
They have that very truck at the farm. I havent been around alot of long hoods and thought wow when i opened the hood. It had a propane kit and hardwood floors. Some one replaced the dash lights with blue christamas tree lights i replaced the old lights with blue ones.Strangest one I saw was a Peterbilt 379 extended hood with a huge sleeper... It had a 430HP C12, when you tilted the hood you had to search for the engine.
Nige
Senior Member
Does anyone else think that the proposed conversion would be a suitable entry into a d1ck-swinging contest..?
DMiller
Senior Member
This is in a 1086, trying to shoehorn much else in this hole would be a mess that I doubt could be managed. Three dimensionally limited and basically a bad choice for quoted HP. To be honest, I do not see the draw to Low Cab Forwards, had to work on too many over the years similar by IHC, Ford and GM that were a mess for packed together mechanisms in a confined space.
RZucker
Senior Member
Yikes! that is tight. I see the fan is on the crank too.