Dt466 performance
 

New to the forum, I have a 1985 IH s1954(Crew cab, bed from a f-350, some other interesting junk) powered by a Dt466 that uses the Bosch MW injection pump. I've done a lot of research and I already know the MW can't fuel like the A or P pump but I'm trying to make due with a broke college kid budget and determination to make 250-300 hp at the NHRDA Desert Diesel drags. I already adjusted the simple low boost low rpm fueling and cranked the gov springs. I know somewhere in that pump there is a fuel plate and or torque plate as well as delivery valve adjustments and timing that can be done but I need helpful insite on how to tweak with these things. If I could end up with at least 200cc's I should be happy(since stock was 89...) also I'm removing that tiny t04 turbo and slapping a borgwarner s475(just waiting on my .90a/r t4 exhaust housing). I have a feeling the rest of the drive train will be ok with the extra power since I have the rt6610 trans and 3.73's in the rear. Any help is greatly appreciated!!

https://cimg7.ibsrv.net/gimg/www.die...5af49e5b1.jpeg


Figured I'd post a picture so y'all can see what I'm Workin with

You can make that with an MW pump. Take off the fuel nuts on the back of the pump(see vid below), and it should be in the 160cc range. There's no fuel/torque plate, just the 2 jamb nuts on a stud. It can get to around 180cc if it's a 10mm pump. Big injectors will really help too. It's gonna take a while to spool a single S475, but the .9 housing will help a little. I'd say to put the timing around 22-24.

Thanks for the reply! Now do I loosen the nuts to where it's flush like in the video or just remove them completely? Also what kind of injectors can I get for this? Like the same kind in a 12 valve cummins or are they different? Also I read somewhere on the low boost adjustment that the little stud can be completely removed but it'll just get pretty hot, what are your thoughts on that?

Depends on the use. If it's just a drag race, take out the nuts on back and the screw on top. There's lots of injector options. A good place for used ones is at pull off.com in the classifieds. Go for up to a 5X17, but a 5x13 is about right. A 4x20 will do it, but they burn pretty dirty. They are quite different than a 12v, but function the same.

Oh ok, yeah it's my daily currently. I tried to post a picture but it doesn't seem to be working. I'll keep an eye out though, thank you!

That changes a lot. Daily driver cant handle that much fuel for very long. Leave the fuel nuts on, like in the video. Also leave the screw on top in place. Being an 85 gets you very limited, since it probably doesnt have any kind of intercooling. Dont even look for bigger injectors, until it has one. Make sure to watch EGT on long hills. Getting up to speed empty really isnt an issue, because a heat spike wont last that long. On that thought, it'll get old waiting for the big turbo to spool. Best bet is to trade someone for an S362, or add one to your 475 for some real good air flow.
Super cool truck!

Ahh ok I see, so what would you say is the cc difference between how it is now and if the screw and nuts were to be removed? I may just trade a buddy for his hx40 hybrid in that case. I'm thinking an intercooler off a first Gen cummins, would that be too small though? And Thanks, it needs some work but slowly it's getting better!

It's about a 20 or so cc difference. Try it with the nuts out, after you swap to that Hyb40. A first gen cooler will choke out at a certain point, but not likely at your power level. Did you buy it with the hood mods?

Ok that shouldn't be too bad since I'm only shooting for 300hp. And I did buy it with those lights already installed but the guy who did it did a terrible bondo job so I bought another hood and I'm planning either build some fancy pod lights or get some off the new super duty's when available.

Ethan96,

How did you make out with your fuel pump? I am sort of in the same boat as you. I have a 1986 S1954 chassis that I am building, and in search of some extra Hp.

Here is my recipe so far:
Stock Dt466c engine
MW Pump (it's 10mm) and plan is to back out the fuel nuts like in Neverenuff's video.
I have already mounted an Borg Warner S2E turbo (similar/slightly larger than a 3LM466). It's a fair bit less turbo than what you are running. Pullers seem to use this turbo in stock classes, and I am told is a good 275-300hp fit.
Transmission is a spicer 5+2 with a dual disk 14" clutch.

I am mounting a 1965 F700 Ford/Merc cab and hood. Not going to pull much with it, maybe eventually mount a flat deck. Basically a big pick-up.

I would like to avoid an intercooler, just to keep budget, timelines and underhood clutter to a minimum. I plan to try without, watch the pyro like a hawk, and see where I end up. I also plan to run two big electric 16" fans for the rad, as I had to mount the rad lower and closer to engine to accommodate the smaller hood. The sell electric fan kits for dodge Cummins and they seem to work okay if you keep your weights down. I would think the 466s make a fair bit less heat than an new EGR/350hp Cummins.

Funny thing about EGT's - an old IH mechanic told me that IH stated in their manuals for the early 466's in ag applications not to exceed 1420degF. That's pre-turbo, but man that's higher than anyone else will tell you!

nevrenufhp u r brilliant. Most questions people ask you are about racing. I just bought a 1994 international 4900 with a dt466. Guy I bought it from claimed he hauled 17tons with no problem. From what I see, I don't know if he's telling the truth. What can I do to get the HP necessary to haul every day.

mirrors
 

what are the mirrors off of on your truck