turboed 923 A1 ?

[Jericho]

So, have to ask, is there anyone out there who has turboed a 923 a1 and if so what were the results EGT , H.P. increases, ect. What parts did you use, was it a intercooled job or a simple intake / exhaust set up with no cooling . thanks

 

[74M35A2]

Let us know what questions remain after you read all the turbo 250 articles posted here, search bar is top right corner.

 

[tobyS]

Let us know what questions remain after you read all the turbo 250 articles posted here, search bar is top right corner.

Do you notice that links don't work and pictures disappear? I'm all for research, but just try and follow conversations without the tables, pictures or links.

It helps to try some different key words sometimes, but few of these technical discussions take into account that only the words... whats typed in... will be later available in a search.

Jerico, please read a few threads about it and I'll converse with you. I don't think it is widely done. The 250 is not well balanced, if I recall correctly. I had a conversation where at some point I brought up using an electric blower and some electric heat elements (cold climate), but that didn't go over too well, as the threads were seriously higher HP, not simply improved performance.

Do you have the 923 A1 that you are referring to?

 

[74M35A2]

I'm not usually a ground pounder for such, but when I typed in turbo 250 and pressed search, I was able to find answers to several of his questions quickly. The HP one will likely not be quantified any further than armchair guessing. If I had a 250 and wanted to turbo it, I would read every page of every article on here about others that have done it before buying anything. We try to build a library of knowledge to be utilized and benefit others, exactly as he is asking for. I didn't go after him meanly, I simply advised to read what has been documented so far. A reasonable expectation, hence the software of this site to be able to do exactly that. In your post, you ask him to do the same exact thing as I advised. The links and photos work perfectly, I just tried it.

 

[tobyS]

Sorry, I didn't mean that you were not correct to read what is in the archives. I also read everything I can find and with multiple key word searches. But I think I pointed out without criticizing you, that reading what comes up in those searches has lost a lot of vital information.

I have seen some people belittled when they didn't do what other posters thought was enough research before posting and hope that was not your intent.

 

[Jbulach]

I don't think it is widely done. The 250 is not well balanced, if I recall correctly. I had a conversation where at some point I brought up using an electric blower and some electric heat elements (cold climate)

Electric blower, as in forced induction/turbo supplement? Would you have a link to this conversation/thread?

 

[tobyS]

Electric blower, as in forced induction/turbo supplement? Would you have a link to this conversation/thread?

Electric as in providing positive air pressure to the naturally aspirated engine (and in the winter that air heated at least on startup), just not as much as a turbo. It's been a long time ago but I'll look.

 

[Jericho]

No sweat here guys, Ive got Twenty years in aviation maintenance I know my way around a wrench and am also a qualified aviation machinist, if I cant buy one I can make one (pistons included) spent my early years rebuilding hundreds of roots vane compressors ( super chargers for aircraft) I certainly didn't mean to get any dander up, You fellas are a wealth of information, I do my research, as well, BUT , theres a months research available in an instant here with a single question! I fully expect that not all are accurate, some are biased and some are far more complex than they need be, But that's what makes this site so valuable , most have been there or pondered that . Yes I have two , a non turbo and a turbo model, just picked them up, I ask because I recently attended The Weare Rally and saw/toured a fantastic A2 with a camper tastefully integrated into the truck, highly modified I might add. Ive heard good points about each model, The non turbo appears to have more hP and more torque, the turbo model has less cubes and likely runs a little hotter and ask more of the internals to produce that power, My use is as a truck capable of cross country trips pulling a 48 foot fifth wheel grossing right around 19k rolling weight and I would like to haul the daily driver "wifes" Jeep four door Wrangler on the bed , weighs around 4200 lbs in its present state. I have an M109 A3 , but didn't want to abuse my deuce , and its a little slow for cross country use, So a 923, p/s p/b/capacity, little more steady cruise speed, seems a no brainer, Perhaps I should have framed my question different and laid it all out to begin with Some feed back has been go with the non turbo, there are some NHC stalwart believiers out there, many love the Cummins. I have not driven either far enough/long enough to make a choice( wife will drive a choice soon as one will go to a friend as part of the deal to buy two keep one lol ) BUT thank you all for your insightful feed back and the quick pointers and direction, its the reason I keep coming back ( I do have trouble reviewing old threads, I don't seem to be able to find, review some of them , So just a thumbs up from here and thank you

 

[porkysplace]

The short answer is the 250 has no provision for oil squirters to cool the pistons , so you will end up with a short engine life.
The civy 290 cummins is basicly a 250 cummins designed for a turbo. Searching Will Wagners posts will provide a lot of insight into cummins motors.

 

[patracy]

I've got/had several diesels that do not have oil squirters. Zero issues out of them. But I ensure that EGT's do not surpass 1100F typically.

There's several threads here about turbo'ing the 250. My SEMTT has a turbo'd 250. (Along with a dual feed line kit, button, and increased fuel screw) Boost is only about 15psi max on it, and EGTs stay below 1100. But it has a very notable increase in power. Probably making around 300-325hp in a conservative guess.

Also "electric blowers" are a joke. They do not flow enough air to make any positive gain. Other than wasting money.

 

[Jbulach]

If it's solely a cross country camper/ toy, keep the A2 (quieter and cheaper to turn up).
Turn the motors power and rpm up a shade, put ac, air ride seats, and 445/65r22.5 tires on it.
Then load up take your time and enjoy this great country!


M925A2 with dump hoist

 

[porkysplace]

I've got/had several diesels that do not have oil squirters. Zero issues out of them. But I ensure that EGT's do not surpass 1100F typically.

There's several threads here about turbo'ing the 250. My SEMTT has a turbo'd 250. (Along with a dual feed line kit, button, and increased fuel screw) Boost is only about 15psi max on it, and EGTs stay below 1100. But it has a very notable increase in power. Probably making around 300-325hp in a conservative guess.

Also "electric blowers" are a joke. They do not flow enough air to make any positive gain. Other than wasting money.

How many miles did you put on those motors a year ?

 

[patracy]

If it's solely a cross country camper/ toy, keep the A2 (quieter and cheaper to turn up).
Turn the motors power and rpm up a shade, put ac, air ride seats, and 445/65r22.5 tires on it.
Then load up take your time and enjoy this great country!


M925A2 with dump hoist

The 250 does not like to rev....

 

[patracy]

How many miles did you put on those motors a year ?

The CUCV is routinely driven. The VW engine I had was a daily as well. Heck I've even pulled a M1082 trailer hundreds of miles with the CUCV.



Unless I luck upon a deal on a 6.5, my HMMWV will be turbo'd in the same fashion as well.

 

[porkysplace]

The CUCV is routinely driven. The VW engine I had was a daily as well. Heck I've even pulled a M1082 trailer hundreds of miles with the CUCV.

View attachment 643282

Unless I luck upon a deal on a 6.5, my HMMWV will be turbo'd in the same fashion as well.

I thought you were referring to turboed 250 cummins motors , 6.2's and VW motors are not really comparable . If you have a heavy truck and put a few thousand miles a year on it a 250 with a turbo probably will hold up , if you put a few thousand miles a week on it , it will have a short life.

 

[patracy]

I do not drive the SEMTT enough to use that as an argument. (Which you'd have used against me) But I see my related facts have gotten in the way of yours. I'll gracefully bow out.

 

[74M35A2]

So to recap, do your homework, venture down a new path, and post your story with results so others can learn from it. Please and thanks.

 

[porkysplace]

I do not drive the SEMTT enough to use that as an argument. (Which you'd have used against me) But I see my related facts have gotten in the way of yours. I'll gracefully bow out.

Well I used to drive a old ford 9000 with a 290 and a 18 speed pulling a 225 Cat excavator or a 5 axle lead dump , The truck was slow and you never stopped shifting but it was dependable and had close to 500,000 with no major engine work to it when the truck was parted out for a broken frame it was still running. There have been a lot of posts about putting a turbo on a 250 , but no one has posted putting high mileage on one after doing it that I have seen . I also haven't seen Will Wagner who works on them daily post anything positive about turboing a 250 .

 

[red]

At my last job one of the trucks I worked on was an older peterbilt with the nhc250 and turbo (altitude kit from Cummins). No piston squirters. Not a 290 or any of the others from the series, a NHC250. Rolled over 1.1 million miles with no major engine work then the customer decided to have it rebuilt. So long as you keep the EGT's down the lack of piston squirters is a non issue for a mild upgrade. Wont reliably make the power of a NTC350 or 400 for long.

 

[Jbulach]

The 250 does not like to rev....

A2 has the 8.3


M925A2 with dump hoist