Question on a 4 bt Cummins

[whip]

I am new on the forum and I hope I post this question in the right place.....My question is about 4bt cummins and the fedex delivery vans ....Are fedex delivery step van equip with a 4 bt or a 6 bt I have seen this vans and they seems to be very decent in their performance not too noisy and very powerfull ......What I have on my mind is to retrofit a 4bt on a F 150 Ford truck..... looking at those vans they seems to be heavier than a Ford F150 so a 4 bt on a F150 have to be even better .....So what info ya all have on this subject...?

[Timmay2]

F150's dont really have strong enough frames, suspension, etc to carry the extra weight. Youd also have to bump up the load rating on at least the front tires while youre at it.

[DeckSetter]

A 4bt wouldn't be NEARLY as much weight as a 6bt. If memory serves, the 4bt is only about 800-850lbs. The 6bt is something like 1100 I think? In any case, it will be heavier than a small block ford, but you'll still PROBABLY want a little heavier springs. The frame could probably handle it.


...at least I hope it will, my friend's about to put a 4bt into his '75 F-100....

[allmotor]

I have a student who's dad installed a 4bt cummins in a suburban and in a chevy blazer. both worked awsomely. I drove the blazer and with 33's on a 4x4 it still pulled nearly 28 mpg and had more than enough power to run 75+. He recently sold the blazer on ebay... got over $3300 for it and the winning bidder drove from Colorado to WI to get it. From the feed back on the deal. seems the winning bidder is quite happy with the truck.

[89acclaim]

I wonder how nice a 4bt would be in a 4x4 dakota with the 6spd manual from the rams. Hummm

Daniel Merrill

[allmotor]

It would be PERFECT. infact since 1992, I've been wishing Dodge would have put the 3.9 cummins 4BT engine in a dakota. it would fit perfectly and offer more power than one could imagine. I even worked for Chrysler training in 1994 and couldn't get anyone in engineering to even concider or pursue that option. GEEZ they really don't want to give the customers what they want.

[Diesel dakota]

Quote:

Originally Posted by 89acclaim I wonder how nice a 4bt would be in a 4x4 dakota with the 6spd manual from the rams.

It works fine I dropped one into a 2003 5 speed standard 4x4 dakota it took alot of fabrication to the oilpan to get it to fit around the front dif new engine mounts obviously had to be made.
mounts had to be made for the front dif because the old ones were mounted to the engine we mounted them to the frame.
we got the speedometer working but can't get the oil pressure temp or tachometer working.
any suggestions to get these working would be appreciated.
just got insurance and registration today so still working out some bugs there is some vibration and some air is leeking out of the turbo so we are losing some power.
still have the stock injectors and turbo.
had to jack up the front springs but the stock ones seem to work fine.
drove it around for about an hour befor we remembered that there is no oil in the tranny hoping no damage.
project was a pain in the ass but overall it was fun and we'll see how it turns out in about a week I'll post the milage

[bfarroo]

Sounds like a cool swap, If I could find one in my area I'd consider putting it in my 95 dakota. I don't see much for those motors in the area although I don't know where the junked delivery trucks end up either.

Benji

[87dtna]

6 speed wouldn't work, the NV5600 is way too large to fit in a dakota. It could probably fit if you made it, but it would require a heck of a lot more fabrication than the NV4500 5 speed which is the usual choice. There;'s a common misconception between the 5 and 6 speeds. 5th gear on the 4500 and 6th gear on the 5600 are the same, you aren't getting anymore overdrive with the 6 speed. The difference is the 3rd to 4th gear drop, is decently large in the NV4500 but not that bad IMO I never had trouble with mine.

[Lucky Jeff]

yea it'd be pretty silly to put the NV5600 6 speed in a Dakota.. The only reason they're in the rams is pulling HEAVY.. Even in a Ram it isn't needed unless you pull heavy often. 4bt in an F150 would be a great swap.. I've seen a few in CJ's and they are awesome

[texans4]

What would be needed to retro a 2005 hemi with a 4BT cummins?