93' Suburban 4x4 Cummins 4BT conversion 26 MPG!

The Suburban ran great and had fun driving it. The motor has excellent torque and driveability. pressure. The exhaust is a 3" with a basic diesel muffler. Just took on a 1,900 mile trip and got the best of 26 MPG! That is without an intercooler but will get one soon. Go to 4btswaps.com to see other vehicles like this.

I do not recommend this engine swap for an everyday driver only because of the vibrations are to shaky. If I were to do it again I would install a 5.9 Cummins. Again, the power and torque were not an issue and the fuel mileage increase definitely paid off but the vibrations at idle took some of the fun out of it. Just my opinion is all....

However, I wouldn't hesitate to install a 3.9 in a toy like a jeep.

Category:

Autos & Vehicles

Tags:

• Chevy
• Suburban
• Cummins
• 4BT
• diesel
• Conversion

[cammingchevy]

A6bt would get just as much mileage

[foxsecret]

@cammingchevy Maybe

[smithkid1996]

ok so i have a lot of odd questions. for one do you keep the original trans and rear end? the computer system, do you have to modify the 4BT computer to work with the suburban trans (if you use that trany.) how much would this conversion cost? what kind of difference in power is there? we have a 454 in our suburban 2500and one of the resones we love it is the amount of power. 

[foxsecret]

@smithkid1996 I swapped the computer controlled trans for a hydraulic controlled one (4L60E to 700R4)

No computer on the 4BT it's mechanically controlled.

Conversion costs $5,500

Same power except the original 350 would pull away.

I would go with a 6BT in your suburban, a little less in fuel mileage by a couple of digits but smooth and alot more power.

[jeepscometrue]

Do you think it's to loud I thought about putting one in my 97 jeep grand cherokee

[foxsecret]

@jeepscometrue Yes it's loud.

[foxsecret]

@icedragon99115 I don't think you can get 26 mpg out of a 6.2 unless it's fluke of a motor. 20-22 tops from a 6.2 I owned them. However, you can't get the durability of a Cummins from a 6.2

[seifs4]

@foxsecret not if ur building hp, but if u keep them stock a 6.2 or 6.5 will go well over 200,000miles no problem.

[1tonchevyturbo]

Would you say that engine has more power and torque than the 6.5l turbo diesel

[greatwhitejake]

i want a 4cyl diesel vehicle cause the time, money and pure wast of energy it takes to keep a p.o.s gas engine running is ridiculous! a diesel get 2x's the mileage, lasts 3 times longer and costs half the money to keep running. they go for 500,000 or more miles before needing overhauled, its just the better choice over all. im sick of wasting time, energy and money on gas engines. also the power a diesel has over a gas engine is twice the torque. a 4cyl is almost equal to a v8 gas engine.

[greatwhitejake]

i have been reading alot about the isuzu 4cyl diesel, from what i gather it will get a little over 30mpg in a pickup/suv and its a smoother running engine than the 4bt cummins wishes it could be. i dont know from experiance so im asking, would the isuzu 4cyl diesel be the better choice for a daily driver? it doesnt vibrate like the 4bt and it gets slightly better mileage from what i have gathered

[BuBoNiCcHrOnIc91]

@foxsecret what modding if any did you do to get the cummins to fit ive heard its a bit tall and how did and how hard was it to get the tranny to work with it

[Tbolt1000TForLife]

would it get better milege with an intercooler and a turbo mod? im currently looking for a 1998 or 1999 Chevy Tahoe LT and im thinking about doing a conversion like this to it

[SouthWestIron]

oh man this was a nice swap! I wouldn't change a thing. Cruising around in Suburban sized vehicle at 26 miles to the gallon and torque enough to do whatever. Just awesome. One of the finest engines ever made!