How long has the 6bt engine design been around?

[Motorhead]

I'm sure one of you guys out there knows how long the 6bt or 4bt has been in existance. So how old is the design and what was it origionally intended to power. Chris

 

[baby.driver]

I can't be exact....

but a trucker friend said it was an old 150 horse, from bfore they put turbos on 'em.

 

[Motorhead]

6BT heritage

Do you know about how long this engine design has been around? Was a non turbo used as a stationary eng?

 

[Grey Wolf]

If memory serves me (not too well!) it was 1983, and they were used in quite a few different applications.

 

[The patriot]

Early 80's sounds right. A buddy of mine tells me the early engines werent too good as marine engines. Problems with the heads cracking.

Eric

 

[Archive]

This would make for an interesting TDR Magazine article. Tell us the who, what, when, where and why behind the B series engine design. I also want to know why the parent bore design? Why a Bosch brand instead of a traditional Cummins PT (pressure timed) fuel system? Why mushroom flat tappets instead of a roller cam? (Please, Please don't say $$$$$$$. Even my 2002 free non-optional standard 7/100 warranty lowball gasburner cro-Magnum 360 has a roller cam. )



In short, why is this engine so different from what Cummins designed and builds for the class 8 OTR tractors???

 

[The patriot]

Same reason the Cat mid range engines are so different than the big boys.

Different deseign for a different app.

Eric

 

[Archive]

Patriot, are the fuel systems on the small Cats of a completely different design? Are the injection pressures made at the pump or the injector? Thanks.

 

[JHansen]

Interesting reading in a book that a Case-loving buddy of mine has on his mantle. Can't remember the title for sure-something about the full story of Case... ... anyways according to this book Case was looking for somebody to supply them with a new series of engines for their tractors. Nobody had anything sized appropriately-and nobody was willing to design anything for them. They ended up cutting a deal with Cummins to co-design the B and C series engines-and Cummins would manufacture them. In return Cummins would get the rights to market them outside of Case. This would explain a lot of the design differences between them and a "pure" Cummins engine-and would also explain why Case tractors were the first application. If you look under the hood of a Case today with a B or C series you will see the engine tag on the gear cover doesn't say anything about Cummins-they are tagged Consolidated Diesel which is a joint venture between Case and Cummins.



My take on the situation anyways... . no doubt there is some error in what I've posted here-but I'm reasonably sure the substance is correct.



Jason

 

[Champane Flight]

Little different

I heard from an old marine mech that the 6BT was first a marine engine and came out in the late seventys. It was not ever used in class eight trucks as far as I know. I drove plenty of ole 160-190-220 non-turboed Cummins and none of them resembled a 6BT, the ole buggers had way more weight and cubes.



I saw a ocean class powerboat back in 1981 with two 6BTs in it. Had quite a sound when fired!

 

[C Schomer]

Mark Chappell said the B and Cs were developed in the late 70s for 3th world multifuel tractor engines. They didn't know what kind of crummy fuel would be used so they built a humungous bottom end to take detonation. This works along with the Case story. Craig

 

[The patriot]

Originally posted by TopFuel

Patriot, are the fuel systems on the small Cats of a completely different design? Are the injection pressures made at the pump or the injector? Thanks.

Dont know much about the small ones. My brother has a Peterbilt with a 3406 C. Excellent engine.

I'm not hearing the same about Cat's mid range engines.

Most of my experience was with Mack engines. That was a long time ago.

Eric

 

[The patriot]

Champane, the old Cummins 220's etc, were 855 Cu in engines.

Eric

 

[nickleinonen]

the older smaller cats had the hydromechanical unit injectors. . the newer ones have the HEUI injectors like the navistar 444 i believe. the bigger newer ones i think are using electronic unit injectors like the 60 series detriot.

 

[Archive]

HMMMMMmmmm, it could indeed be Case. I was told in 1979 that it was the European truck manufacturer Iveco. Their engine - badge engineered by Cummins. (We need a European correspondent. ) Paging Marco, Paging Marco. What do you know about a possible Iveco/Cummins connection???

The plot thickens... .



(BTW, when I was told this in 1979 I was a technician employed at Cummins Mid South in the engine rebuild department. )

 

[HoleshotHolset]

Cool thread!

 

[Archive]

I don't believe we will be told the true origins by Cummins, that's for sure. Maybe if I offered to bootleg you guys a few copies of my IN**** software? IMO, the engine company would have someone on here post haste ranting, raving and reminding us pesky ill mannered customers about how the money trail truly works. It bothered me to see them jump in on that thread. (While more lift pump threads than McDonalds has sold hamburgers sit here and rot ... with NO Official response. )

I'm thru venting. Good Luck Gentlemen. I actually belong on the gasburner web pages now anyhoo.

 

[R.E. Miller]

I vote on the Case...case.

I actually read this somewhere, the joint venture between Case and Cummins, but I can't remember of course Any how, check out any Case 1845C skidloader... . yup cute little 3. 9 4bt in there Case backhoe's have a similar thing but with the 6bt, I think.



Russell

 

[Champane Flight]

Posted

I went to the Cummins site and posted the question to them. I guess we will see.

 

[Motorhead]

Thanks Champagne for the digging to Cummins. I would be interesting to see a cronology of the engine and any failures or weaknesses and their fixxes. Thanks, Chris