2 more diesel 80s from Proffitt's

This site may earn a commission from merchant affiliate
links, including eBay, Amazon, Skimlinks, and others.

Not all of them. The 2.8HS is nice, but timing belts, aluminum cylinder head and a history for broken pistons, spun bearings and general shoddy performance has me less than sold. Not to mention a very questionable legality VS EPA / EC regulations. I would stick to a federally certified EPA engine.

I would stick to industrial duty instead of automotive duty.
Nothing beats a cummins, Oh!.... except maybe a Cat.
 
Does anybody know the Emission laws for Denver on this conversion?
I was wanting to put the 4bt cummins in my 1990 toy truck.
I called the guys down at the engine program (or whatever its called) but when you do an engine conversion, and need it inspected for emissions for the city of Denver, you take it to them to have it ok`d.
I asked them if I could put a 4BT cummins in my 1990 toyota truck, and be legal for Denver, and they told me it was ok to do, just bring it to them when its done for the inspection.

So I better get started!!
 
costs

Long time lurker on mud, first time contributor though. The green 80 is mine. Picked it up from Proffitt's on the 12th and drove it back to the SF Bay Area. The work is beautiful, everything fits very nicely and the truck runs great. The two trucks averaged around 22mpg on the way back, but we were not gentle on them, cruising at 80-85 mph on the way home over all the passes and everything. Tinkering with the fuel screw and the pump timing has provided a nice bump in power. New injectors will be on order soon and then a second tank to run svo.

As for the abs, the truck is now part time 4 wheel drive, so the abs only works when the front drive plates are locked. Not a big deal in my opinion, but the ABS warning light is on which is a little annoying.

:beer: Thanks to all the guys out at Proffitts that put this together for me.:beer:

I can't believe nobody has asked but, How much does it cost to do this to your rig? Also what do you have to provide (the drive train)?:cheers:
I saw the quote of 12K -13K , Is that for "turn key" or are there any other cost?
 
Last edited:
I can't believe nobody has asked but, How much does it cost to do this to your rig? Also what do you have to provide (the drive train)?:cheers:
I saw the quote of 12K -13K , Is that for "turn key" or are there any other cost?

It has been asked and has been answered. Conversions usually cost between $12K-$14K. That is a turn-key conversion. You drive in as a gasser, and you leave as a diesel. You don't supply anything, unless you really want to. Sometimes the customer can find a 4BT cheaper than we can. Engine prices are going up as EVERYONE wants a 4BT now. You can hardly find them for less than $3K anymore. They are being put into everything that you can imagine.........Land Cruisers, Broncos, Scouts, Jeeps, Power Wagons, etc.
 
It has been asked and has been answered. Conversions usually cost between $12K-$14K. That is a turn-key conversion. You drive in as a gasser, and you leave as a diesel. You don't supply anything, unless you really want to. Sometimes the customer can find a 4BT cheaper than we can. Engine prices are going up as EVERYONE wants a 4BT now. You can hardly find them for less than $3K anymore. They are being put into everything that you can imagine.........Land Cruisers, Broncos, Scouts, Jeeps, Power Wagons, etc.

We all appreciate the information GC. Thank you. What is your opinion of the 6BT in a cruiser??
 
Thanks HZJ60 that was my next question. It seems that you can find the 6bt a little more easily, and maybe a little cheaper as well. Man that thing must be a heavy beast though.
 
Last edited:
We started up an Isuzu 4BD1T last night.. I have been obsessed with this motor long before the 4BT, it is sort of a quieter, peppier, 4BT without all the clunkiness. Sort of like a Toyota V8 versus maybe an earlier GM V8... We are going to swap this into a FJ62 in the next couple months.. I have done two 4BTs now, nothing wrong with them but if I could do it again, this time I would do the Isuzu. They are cheaper, but the adapters are a little expensive, via Isuzudieselswappers.com That said I just checked their page and it's gone!
 
Thanks HZJ60 that was my next question. It seems that you can find the 6bt a little more easily, and maybe a little cheaper as well. Man that thing must be a heavy beast though.
I feel that the 6BT is way too much engine for a Cruiser. Yes, you can put one in and it has been done before, but I would not want one.
1) it is very heavy.
2) there is a lot of power there that will never be used. It's not like you are going to tow a 20K lb trailer with your Cruiser. If you want a tow rig.......go buy a Chevy, Dodge, or Ford.

Yes they are cheaper but to what cost? With the power of a 6BT, you may have to replace axles, beefen up the frame, etc.

Dre........that is sweet. I was also very interested in the Isuzu 4BD1T but never could find an adapter. Helluva an engine. Congrats.
 
Well its not for me but my good friend Bill Hartlieb.. Here are some pics from last night. He scored a really cheap reman 4BD1T that was in a wreck that supposedly has less than 20K or so.. But again the adapters are not cheap so it will add up... They don't have the life of the Cummins though, most seems to be 200 to maybe 300K motors as most versus the beefier 4BT. It is a lot shorter, I will get good real world info about how much lift you would need to put one of these into a 40 or 60... The pan is much more shallow and the stroke is shorter (sort of like a 2F versus a 3FE) so it should wrap up a little higher and is generally overall shorter height wise...

Anywhoo, here it is, 60 lbs of oil pressure last night, woo hoo! It is running in all of these photos....
SM_DSC_0049.webp
SM_DSC_0050.webp
SM_DSC_0052.webp
 
Actually it's a 29 I am pretty sure.. Not mine, plan is sort of a rat rodish thing. Leave it as butt ugly as it is, lowered with good drivetrain and the owner wants to put a Chev 350 in it.. Sort of old hot rod style, loud pipes, just to be fun, obnoxious.. But still for some reason, I am a diesel guy and was never hot rodder or anything of the sort but I think that's sort of cool... For now, it's just sitting though.. A
 
From all the research I (and many others here) have done I was told that you could not do this conversion and have it smog legal in CA (I know diesels are smog exempt that is not the issue). Is there a loop hole I am missing somewhere? Any insight would be much appreciated!


it is not a problem. the CARB rules state that the motor must be from a vehicle the same year or newer than yours, and it must have all of the emissions that it came with. CARB does not address diesels specificly as i recall, but the rules are posted on line if you want to check it out.
 
it is not a problem. the CARB rules state that the motor must be from a vehicle the same year or newer than yours, and it must have all of the emissions that it came with. CARB does not address diesels specificly as i recall, but the rules are posted on line if you want to check it out.

Thanks. The way I understood it was that it is also a weight class issue. A guy I talked to on the phone at CARB said that you can't put a medium duty engine in a light duty vehicle as well. Which technically according to him would be a 4BT into a Cruiser...
 
Thanks. The way I understood it was that it is also a weight class issue. A guy I talked to on the phone at CARB said that you can't put a medium duty engine in a light duty vehicle as well. Which technically according to him would be a 4BT into a Cruiser...

well.... technicly a medium duty truck (even though they say "heavy duty") would be something like a dodge 2500/3500 or a ford f250/350. heavy duty trucks would be like the topkick or similar. so really he is not correct. besides, the bread trucks they put those motors in, are certainly not heavy duty.
 
well.... technicly a medium duty truck (even though they say "heavy duty") would be something like a dodge 2500/3500 or a ford f250/350. heavy duty trucks would be like the topkick or similar. so really he is not correct. besides, the bread trucks they put those motors in, are certainly not heavy duty.

I hope he is wrong, but now I don't plan on moving back to CA anymore, so hopefully it won't be an issue ;)
 
I do the web site for Proffitt's and am in the middle of a big update about maybe 20% through so far.. So I don't want to burst the bubble too much as there is a lot that is not diesel related that I will be updating.. But I have the 4BT section updated already... Photos of some of the 60s and 62s and 80s they have been doing...
http://www.proffittscruisers.com/diesel/cummins/index.html
 
Back
Top Bottom