75 620 Longbed Diesel swap

[Nothsa110]

Howdy yall. I've got at 75 620 Longbed with a l20b in it. But I seem to have caught the Diesel fever. So what are some good Turbo Diesel options for a 620? I know the Om617 is a common one for the 720 and D21 but it's a little big for a 620. The 4BT is to heavy and tall (and expensive). I am thinking a 1.9 TDI but that's got a bunch of electronics. Is there something around the size of the 1.9 that is all mechanical?

[datzenmike]

I don't think the D21 Hardbody had a diesel option in North America.

 

The SD in the later 720 is 2.5 and is a dog on the highway without a turbo and half a dog with. A 1.9 isn't going to be better.

[Nothsa110]

Yeah. Im thinking of trying to get something up to around 150 hp and 250-300lb of torque range. I know that would take injection pump, turbo and injector modifications/upgrades. That's why I wasn't thinking the SD was a good option. 

[datzenmike]

It's my experience that even huge displacement diesels don't make much hp. Lots of torque but little HP

[Nothsa110]

Yeah thats normal. But they are fun. I'm just wondering if there is a small I4 diesel that fits these 620s that's capable of making some power. 

[klam07]

https://www.rustyspeedwerks.com/vw620

http://www.speedhunters.com/2018/07/this-is-the-datswagen/

 

This was a local who swapped a 1.6L VW diesel. Used an adapter and a toyota trans to the original rear end. Not a lot of info on the swap itself but figured I'd throw it out there.

 

Theres a member on here/facebook whose doing an Audi diesel swap:

 

Food for thought

[Nothsa110]

Thanks! 

Im not worrying about the rear end I'll be doing a Ford 8.8 swap. 

[Stinky]

I think that you are wasting ur time there.

 

The H190 axles is pretty stout.

[Valvebounce]

Did you get the ld20t where you are?

[Ben_upde]

A 1.9TDI is a great powerplant for these trucks. The cars they came in from the factory are ~3200lbs and are fairly spritely stock. A tune wakes them up considerably. Delete the EGR and you have a very solid, bulletproof engine that’ll be tons of fun and return excellent fuel economy at the same time. 
it will fit almost the same as my audi 1.8t and uses the same transmission adapter i’ll be using eventually to put a Toyota trans in it so I can gain my 4”+ of rear drop back by flipping the diff to a normal position.