Up grading to bigger detroit

Ericbsc · August 17, 2010, 06:26:16 AM

Don't know if anyony has thought about this but your Eagle has a drop box. It has a max hp rating. I just completely rebuilt mine. The three gears are no longer produced and the remaining new ones available are approching gold pricing!! LOL. I would sorta watch the hp I put on the box. I am looking at upgrading my Eagle from the 8-71 to the Cummins ISM with an overdrive transmission. It is a 425 hp engine, can't remember the tourqe. I think in the 1200-1400 range. The 8-71 in stock bus dress was 285 hp. and I think about 800-900 lbs. The new ford and Dodge pickups have more than that!!

buswarrior · August 17, 2010, 06:29:35 AM

I'm with Brian. THIS IS AN OLD POST FROM THE ARCHIVES! 2

2007 vintage

The original poster does not read the boards anymore.

happy coaching!
buswarrior

luvrbus · August 17, 2010, 06:44:10 AM

I know it is a old post this for Eric, someone is blowing smoke about the drop box and the hp rating those are rated 2850 input torque I know Eagle owners that have 625 hp Cat,Cummins and Detroit engines in front of the drop box only draw back to one is the gearing for the differential and some have worked around that by cutting new gears,FWIW my 8v92 had 1580 lbs of torque going into it never a problem for me.

good luck

Mex-Busnut · August 17, 2010, 08:26:27 AM

Quote from: bevans6 on August 17, 2010, 06:22:24 AM
Our new friend XE1UFO seems to have a penchant for digging up multi-year old threads and replying to them. I find it irritating, personally.

Brian

So sorry, Brian. I have no intention of irritating anybody. I am just trying to learn all I can.

Be blessed and enjoy life.

Dr. Steve, central old Mexico

bevans6 · August 17, 2010, 08:48:45 AM

Well, something that I think no one would ever object to is if you found a post or thread in the archives and linked to it with a fresh question. Or even replied to it saying something like "Sorry for dragging this old thread out again, but I had these questions about what was discussed in it." if you didn't know how to link.

I spent a fair bit of time crafting a considered reply to one of your resurrected posts and frankly felt a bit of a chump for doing so, when I realized that the OP had the problem three or four year earlier and had no doubt figured it out by now. Waste of my time.

On the other hand people seem to want to continue to discuss installing big engines in their bus, that may be a universal topic!

Brian

David Anderson · August 17, 2010, 08:51:40 AM

It IS an old post. When I saw "Driving Miss Lazy" on here I thought maybe Richard came back to life.

Did the original poster every get the "big dog" engine?

David

Ericbsc · August 17, 2010, 10:58:22 AM

Even though it is an old thread I am learnin (as we say down south) a lot. I was worried about putting to much hp and tourqe on the drop box. I hear some say no problem and then some say I wouldn't do that. I was talking to Byron Pigg at Santee this year about that very issue. He has a 500hp 60 in his 15. He said he had no problems in 1ook miles. He left there and lost the whole read end!! I hope I didn't jinx him!! I know the box is pretty heavy duty, cause I wreastled the beast out and and back unfer there!!

luvrbus · August 17, 2010, 11:16:54 AM

Eric, Bryon lost the ring gear and pinion nothing happen to the drop box Jim stills has the drop box behind his 60 s so does Ben they don't give problems just a little tlc from time to time.

good luck

TomC · August 17, 2010, 01:41:55 PM

If you're worried about the drop box, always run an electronically controlled Allison automatic, and it will live the longest. Running a manual transmission-no matter how good of a shifter you are, you're going to grind gears and jolt the bus-one of the worst things you can do to the driveline! Good Luck, TomC