The Stovebolt Site Forums The Parking Lot Big Bolts 10 speed transmission pictures and parking brake

hers are some pictures of my finished roadranger transmission and brake. start with this link and then start the slide show to see the following ones.
http://community.webshots.com/mypho...=2010033130080251109&security=DyhpOA

this link works better

http://community.webshots.com/album/483943098JelLUj/3

then the rest of the pictures are on the next page (page 5)

looking good

I looked around a little and didn't find the info, so I'm sorry if this is repeditive. Where did you get it(the motor) and for how much? How many miles does it have on it? Did you do any internal work other than the oil pickup? I have a Banks turbo kit for a 6.2 chevy diesel, but I am not sure I want to go that route, Looking at all angles.

Grigg;
Man,you do nice work! Hey,if you put a Jimmie blower on your 4-53,that'd make it a 4-71,wouldn't it? Seems like that's how that works. So by that logic,a blower AND a turbo'd make it a 4-92? Or,at least,I think it should.

Speed

ALL GM Diesel Diesel Engines of this thype have a blower on them, no blower and it won't run. 4-53 tells you it's a 4 clyinder with 53 cid per cylinder, so a 4-53 would be 212 cid, thus a 4-17 would be 4 clyinder with 71 cid per cylinder or 284 cid....

You can see the blower in This Picture .

Just to amplify what Jolly posted, these are two-stroke diesel engines. The blower isn't used as a supercharger, it's a scavenger pump. Drag racers have converted them to superchargers for gasoline engines.

Joe Padavano

I rebuilt one of those trans. many years ago. The gears all have to be timed like timing gears. I got it all together & it would turn so far & lock up. I didn,t have them timed right. I had to tear it down & do it over.

My knowledge of diesels is almost nil. I can understand what would be gained with a 10 speed gearbox, but going from a 6 cylinder to a 4 cylinder dosen't seem to make sense. Would there be that much torque gained with a diesel coupled to a 10 speed to offset the loss of 2 cylinders? It would seem that a 6 cylinder diesel would be a better choice for a big bolt.
Except for small cars and trucks (and my little Kubota tractor) my experience has been that 4 cylinder engines are usually underpowered.
Will this 4 cylinder diesel put out as much or more than the original 6 cylinder?

Don't forget the fact, that I know very little about diesels. So, try and be easy on me. The reason that I am asking, is I was also toying with the idea of someday putting a newer diesel in a big bolt. Although, I was thinking more about a 6 cylinder.

John

The GM or "Detroit Diesel" two-stroke diesel engines have a power stroke every time the piston goes down, were most engine most folks know of are four-stroke, meaning there is only one power stroke for every two times the piston is moving down.

So with this in mind, a 4-71 would make power with all four cylinders for every rotation of the crankshaft, while the stock 6 cylinder would only have power from three of it's six cylinder on each rotation of the crank. the crank in the 6 cylinder has to turn twice to fire all 6 cylinders, while the 4-71 would have fired all 4 cylinder twice in two rotations of the crank, meaning you got power from 8 cylinders or two more than the 6 cylinder.

The 4-71 Diesel should have a higher torque rating than the stock 6 cylinder, but it may not have the horsepower. Diesel engines are built for pulling power (torque), while gas engines are built for speed (horsepower).

Jolly, Thanks for explaining that to me. But now I have a few more questions.
Are all, or almost all diesels engines two stroke, or are their four strokes also? What would a typical application be for a 4-71? Would that be for a medium duty truck, or possibly an off road application like a motor grader or something similar?
What about a Ford Power Stroke, two or four stroke? I guess I never really looked that close, but I always assumed that they were of the V8 configuration.
I have over heard many diesel people say that the Power Stroke was by far the best, followed by the Cummins that is available in the Dodges. Just about everyone that I talked to had very few good things to say about the Duramax. What is your take on this? Or are these engines much different than a 4-71?

John

Vary few diesels engines are two stroke, Most are four stroke, and all are going to be four stroke because the old two stroke wont meet the new EPA requirements. The Power Stroke or Cumming B-model, four stroke.

4-71s were used a lot in medium duty trucks, it came in sizes from 1-71 to 16V71. they quit building any of the Detroit Diesel two stroke engines a few years ago, so they are now a collectors item.

I have not had any first hand experience with the Duramax, so I can't say about that one, but my self I would NEVER own a Cumming powered anything. the Navistar Power Stroke, yes, good engine, holds up well. But for we I will stick with gas in my pickups, I don't work them enough to justify the price of a diesel.

For use in a Classic truck, I would stick with a Detroit Diesel, depending on the size of the truck. for a pickup a 4-53 or 4-71 will work just great.

For the record, I just picked up one of the "Worst Diesel Engines Ever" (not my words, but said by many folks that worked on them back when) GMC Toro-Flow DH478 V6 , I just wanted it for to say I have one, don't know what I'm going to do with it, display engine or put it in a pickup?

Jolly, Thanks for educating me.

John

Thanks for helping out Jolly.
However Detroit still makes some two strokes for the military, like a 6v53TI with 400HP. They may make a few others, not sure, but they do list some on the website. For us normal people the last two stroke was made in 2000.
Grigg

gimpyrobb,
My 4-53T came from a 1978 GMC 6500 dump truck. I bought the whole thing for about 1/3 the core value of the engine, and then sold the leftovers.
The truck and engine only had 84,000 miles and the engine was never messed with inside. I drove it home about 8 hours and it ran great. I changed the pickup around to turn the oil pan around. Had the turbo rebuilt although it may not have needed it. I need to replace the blower drive gasket that involves removing the blower, so I will rebuild it when I have it off, only about $45 in parts. Other than that it is as I drove it home, except for the steam cleaning and scrubing and paint. I will wear it out in my truck before I rebuild it.

Jolly: you didn't mention that D-D also made a 92 series = 92 cubic inches per cylinder. There were 8V92's and 12V92's for sure. I don't know if they ever got around to a 16 cylinder in that or not. The 12 cylinder engines were generally used in marine applications with some in heavy trucks.

There was a 16V92. It was made by attaching two 8Vs crankshaft to crankshaft.

Love those old Detroit & the larger GM-Cleveland/Electromotive two-strokes. I worked on them for most of my Navy career and for a period of a few years that I worked at a Army depot on Armored Personnel Carriers. From the 3-53 up to the 16-278s. That 6V-53TI is probably what's being used the APCs now.