We just got a line on a DD 4 inline something or other (4-53 possibly). Price seems to be right, just have to go and get it.......:) about 2 miles up the side of a mountain, on an overgrown logging road.

The motor is in a log-skidder that the operator left the brakes on and burned up a couple of years ago. Owner said motor was rebuilt just before he fired that operator.... :D

Buy ear protectors.
What do you plan to do with this thing?

No plan for the motor yet, but has a good blower and cover that doesn't take up much room in the shop.....

I don't know how familiar you are with 53s, but the blower isn't the same as a 71 series. The lobes are flat instead of helical and the bearings aren't roller / ball like the 71s.
In other words, it looks cool on a hot rod ... as long as you don't want it to actually work.
Other than that, they were kind of cool ... in a weird, freak show kind of way. Lots of noise, not much else.

That would explain why it is lower profile than our other.....

We are planning on installing one on a 6.2/6.5 n/a, just to boost a little, and of course, have the cool sound. We are hoping to have power/efficiency increase, with less stress to motor than a turbo charged system...

The other came off an old Trojan loader, don't remember if it was 3 or 4 cylinder. Do you know these well enough to identify it for us ?

It's been a while since I worked on a 53, but the major difference between a 3-53 blower and a 4-53 is going to be the length of the case and the drive extension. The 4-53 is longer.
Most hot rodders "used" 6-71 blowers. I say "used" because they used very little of the actual blower. I think they used the rotors and the end plates. Pretty much everything else needed to be changed to accomodate the belt drive system, the engine intake manifold, and the increased rpm of gas engines vs the original DD governed rpm.
Putting a blower on a 6.2 would be an interesting project ... if you have a lot of time and a good fab shop.
In the end, you'll still have a 6.2 - but it's a better fit in a pickup than a 53.

if you have a lot of time and a good fab shop.

LOL....we are our fab shop, this is just another project we would like to try..... we have the 3-71 blower here already and can go pick up the 4-53 blower. We like the 4-53 unit, because of the lower profile.....

We never found yet what the boost numbers might be on these, also the cfm is of interest. We were talking and theoretically a blower off of a 2 stoke of 1/2 the cubic inch displacement should be able to furnish a 4 stroke with the equal amount (volume) of air, as long as the rpm of the blower iself is kept constant.

What do you think? Oh, and by the way, we are glad that you decided to post your first posts on this site with us..... jim & jeff cairnes.

Sorry I didn't pick up that the 3 cylinder was a 71 series.
I have no idea what the CFM would be. On the 2 cycle engines the blower packs clean air through the ports around the side of the cylinder sleeves. There are no intake valves, so 'forced induction' is a necessity. If you wanted to maximize power on the diesels you paid close attention to polishing the case and set the lobes at the tight end of the spec.
It isn't exactly constant rpm as the blower is driven off the gear train. It does put out the same blower rpm for a given engine speed.
You are right about the 2 strokes having small displacement - a 4-53 is a whopping 212 cu.in. The 3-71 is 213 cu.in. Even an 8V-71 is only 568 cu in and it could crank out 318 hp - 335 if you went to 70mm injectors. The turbo 8v-71 was 350 hp.
The bad news is that the boost dropped off with rpm - which meant the power went as well. Drivers kept Detroits cranked up tight or they fell flat on any hill. I've seen 6-71s that turned 2800 rpm full load and lived ... for a little while.
The other problem is that the blower pressurized the crankcase. In a quarry, that is a good thing - it keeps the ambient dust out of the inside of the motor. However, the internal pressure caused oil to find the slightest seam and leaks are a constant battle. Hence the motto "If there's oil in it, there's oil on it".

We have started to search out our pieces to convert our 3-71 blower. Have found a supplier with a kit with sealed bearings to replace the original set up.

Still trying to find a reasonable front housing to be able to run off of serpentine belt system. Also, looking for the original top cover to have the spinning arrows and GM prevalent when the hood is opened.

We figure to be able to utilize a regular intake manifold (probably an EGR modified), just cut down with a plate (aluminum) welded to the top to be able to bolt blower to.

This would be the ideal, as then could be fabbed then just bolted on to any n/a 6.2/6.5L without other modifications needed.

We are only looking to get 8-10psi boost at 3600 rpm, still need to figure out if the 3-71 will be capable of this, without having to spin too fast.

This, we are hoping will be a good match, as the heat from turbo will not be there to raise EGT's.

WHAT did you say AITG???? I couldn't hear you---yup,20 years running a 6-53 in my old 73' Jimmy 10 wheel dump.In this 1 town by me with a very narrow street with tall buildings each side,I could actually see large old windows flexing some from the ''barking'' of my Detroit when I came through.I had to wear head phones connected to my ceiling mounted radio/8 track to hear the tunes.

Still trying to find a reasonable front housing to be able to run off of serpentine belt system. Also, looking for the original top cover to have the spinning arrows and GM prevalent when the hood is opened.

We are only looking to get 8-10psi boost at 3600 rpm, still need to figure out if the 3-71 will be capable of this, without having to spin too fast.

This, we are hoping will be a good match, as the heat from turbo will not be there to raise EGT's.

Good luck with the inlet housing - since you're turning the blower 90 degrees from original, you can use a (formerly) vertical inlet to route itself toward the right fenderwell and remote mount an air filter. One benefit to using the original inlet is the emergency stop plate built into it. It's the one thing that will positively shut off the engine if it finds an alternate fuel source.

AFA blower rpm goes, count the teeth on the original drive gear and the original driven gear. You can then figure out the blower speed at 2100 - 2300 engine rpm.

Since it's a two stroke, the cam, balance shaft, and crank all rotate at the same rate.

On the original installation the blower moved a high volume of air at relatively low pressure. Low enough that it was measured in inches of mercury as opposed to pounds of pressure. An inch of mercury is about 0.4 PSIG. I suspect that hot rodders have already figured out some of this stuff building blown small block Chevys. You might want to try Amazon.com to see if you can find a book about hot-rodding GM blowers. I can't recall the name of it, but I'm guessing it would be 50s or 60s vintage.

WHAT did you say AITG???? I couldn't hear you---yup,20 years running a 6-53 in my old 73' Jimmy 10 wheel dump.

The first diesel I ever drove was a 1966 Chevrolet HV 7500 6V-53 single axle tractor. I loved it - probably because it was my first "real diesel".

It wasn't the loudest truck I ever drove. That "honor" belongs to a Dodge powered by a Cummins V8-185. The Dodge and the 185 were perfect for each other: THEY BOTH SUCKED. The genius that bought them got canned and most of them ended up re-powered with Dodge 413 gas motors.

Try reading here: http://www.goodvibesracing.com/BDS_Products.htm?gclid=COSFy--2l6YCFYQUKgod6hdHnQ
The challenge here is that everything is based around gasoline. They do have some gear drive ratio charts.

Try reading here: http://www.goodvibesracing.com/BDS_Products.htm?gclid=COSFy--2l6YCFYQUKgod6hdHnQ
The challenge here is that everything is based around gasoline. They do have some gear drive ratio charts.


thanks for the info, we really apprieciate your input.... we will keep you posted......:) thanks again...

heres a good one... 16-v71 blower....
YouTube - Girl Sucked Into Car Blower

The first diesel I ever drove was a 1966 Chevrolet HV 7500 6V-53 single axle tractor. I loved it - probably because it was my first "real diesel".

It wasn't the loudest truck I ever drove. That "honor" belongs to a Dodge powered by a Cummins V8-185. The Dodge and the 185 were perfect for each other: THEY BOTH SUCKED. The genius that bought them got canned and most of them ended up re-powered with Dodge 413 gas motors.

Forgot to mention my baby Jimmy, which I still own and runs great.It's a 2-53 in my John Deere 1959 440 track loader. The blower is half the size of the whole engine.

Forgot to mention my baby Jimmy, which I still own and runs great.It's a 2-53 in my John Deere 1959 440 track loader. The blower is half the size of the whole engine.

Didn't know there were 2 cylinder 53s. It would be a pretty good motor for a loader - 53s like lots of rpm, constant loads and the pressurized crankcase is perfect for a high dirt environment. The 6V-53 was a popular engine in ready-mix trucks for years.

Downside: a 2-53 can't be putting out more than 50 -60 hp. You better not be in a hurry.

heres a good one... 16-v71 blower....


Don't want to rain on your parade, but there is no such thing as a 16V-71 blower. 16Vs ran two 8V blowers.

GM did some cool things back then - they had a GMC 702 ci V 12 gas engine that had 4 heads, 2 carbs and intakes, two distributor caps. It was awesomely quiet and powerful. It started at -30 degrees. It also got 2 mpg.

Don't want to rain on your parade, but there is no such thing as a 16V-71 blower. 16Vs ran two 8V blowers.

GM did some cool things back then - they had a GMC 702 ci V 12 gas engine that had 4 heads, 2 carbs and intakes, two distributor caps. It was awesomely quiet and powerful. It started at -30 degrees. It also got 2 mpg.

Yah, that video was from the site that you gave the link to, just thought it was kind of funny..... so far have found incredible info. Just working on specs to calculate our pulley sizing.:)

Didn't know there were 2 cylinder 53s. It would be a pretty good motor for a loader - 53s like lots of rpm, constant loads and the pressurized crankcase is perfect for a high dirt environment. The 6V-53 was a popular engine in ready-mix trucks for years.

Downside: a 2-53 can't be putting out more than 50 -60 hp. You better not be in a hurry.

Try 30 HP and a whopping 100 lb. ft. of torque--the rear castings on 2-53's that went into 1958-1960 JD 440 crawlers were unique only to Deere--you could not mate a ''Deere'' 2-53 engine to any other reverser/tranny except Deeres. Old track loaders like mine will push a boulder the size of the machine but yes,they are slow---like the turtle and hare story,and the turtle wins the race.:)

Aitg--here is an old link that I forgot about regarding the correct oil to use in the older 2 stroke Detroits from the other thread I told you about:
http://www.trucksaleguide.com/detroit-diesel-oil.htm

Aitg--here is an old link that I forgot about regarding the correct oil to use in the older 2 stroke Detroits from the other thread I told you about:
http://www.trucksaleguide.com/detroit-diesel-oil.htm

Excellent. I just read in "Lubes and Greases" that straight weight motor oil is going the way of non-detergent oils. That will make watching ash content even more important.