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05-14-2010, 11:48 AM
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#1 |
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urban fourwheelin
Join Date: Aug 2002
Location: Seattle
Posts: 1,007
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Anyone thought about A cummins 4bt swap?
So I'm thinking about going diesel. I saw a suburban with a cummins 4bt swap and it was getting 25 mpg on the highway.....sounds pretty awesome to me.
 On gas I get 200 miles a tank, On diesel with a stock tank that is around a 500 mile range, with a 40 gallon, 1000 could be within reason.I think I have the swap pretty much sorted out on paper. the 4bt is 1 inch longer than the sbc and 45 pounds heavier than a BBC. I will use a NV4500 mated to the 205. I shouldn't even have to move the transfer case. check out this youtube of a 4bt in a 90 blazer. Let me know what you think. basically I'm just wondering if you guys think I should go for it.
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1972 K5 Blazer with Cummins 4BT, NV4500 swap in the parts gathering stage. |
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05-16-2010, 11:26 PM
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#2 |
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Registered User
 
Join Date: Nov 2009
Location: Sioux City, IA
Posts: 158
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Re: Anyone thought about A cummins 4bt swap?
I have read about these swaps in several vehicles. These are great engines and you will love it, it's getting kinda pricey to do- many people are looking for these engines now so they are bringing alot more money than they were a few years ago.
Be sure and post lots of pictures & info... looking forward to it!!
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Dustin '97 Dodge Ram (daily driver) '71 Blazer (supposed to be a toy... insists on being a project) '85 Monte Carlo SS (project) |
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05-16-2010, 11:39 PM
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#3 |
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Future TOTM Winner
Join Date: Aug 2006
Location: Bulverde, TX
Posts: 2,692
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Re: Anyone thought about A cummins 4bt swap?
Heard mention of it but don't recall actually seeing it. As stated above, take lots of pics if you go through with it. Sounds like an awesome drivetrain.
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72 Chevy CST K5 HIGHLANDER BLAZER Getting a 6.0,NV4500,NP205,14BFF (Currently laying all over the place in little pieces) 72 Chevy swb step-side "LS" 6.0 Here's a build thread of sorts 2002 HD2500 Crew Cab, 8.1L Allison 4x4 Daily Driver Check it out www.lsdyno.com |
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05-17-2010, 09:47 AM
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#4 |
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Its lookin' like a Blazer!
Join Date: Aug 2003
Location: Gods Country, KY
Posts: 1,773
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Re: Anyone thought about A cummins 4bt swap?
I had thought about that or a cummins 5.9 but its taken' me long enough to get where I'm at, lol... and still not done
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05-17-2010, 10:03 AM
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#5 |
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MOVE OVER
Join Date: Jun 2002
Location: Warrensburg, MO
Posts: 5,470
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Re: Anyone thought about A cummins 4bt swap?
someone was doing it a few years ago and posted pics and a build thread.. not sure where to find it.. pretty cool thread...
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No matter where you are..... There you are... Buckaroo Banzi |
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05-17-2010, 01:37 PM
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#6 | |
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urban fourwheelin
Join Date: Aug 2002
Location: Seattle
Posts: 1,007
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Re: Anyone thought about A cummins 4bt swap?
Quote:
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1972 K5 Blazer with Cummins 4BT, NV4500 swap in the parts gathering stage. |
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05-17-2010, 03:27 PM
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#7 | |||
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urban fourwheelin
Join Date: Aug 2002
Location: Seattle
Posts: 1,007
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Re: Anyone thought about A cummins 4bt swap?
Quote:
 Quote:
Quote:
the only problem I see with the 5.9 is it will be a hard fit in a blazer. It's already a tight fit in a truck or suburban and the blazer fire wall problems will complicate things further. also while more power is great. I woudn't be able to max out the towing capacity of a 6bt due to the short wheel base of the blazer.
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1972 K5 Blazer with Cummins 4BT, NV4500 swap in the parts gathering stage. Last edited by RED72blazer; 05-17-2010 at 03:28 PM. |
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05-17-2010, 05:00 PM
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#8 |
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Rottenwood Garage Member
Join Date: May 2005
Location: Marietta, Georgia
Posts: 4,321
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Re: Anyone thought about A cummins 4bt swap?
In my opinion its the best way to go if you dont want to do a 5.9.
My plan was to put one in my dually project when the engine blew but I sold it before having any mechanical issues. Do yourself a favor and just buy a donor GM bread truck so you have EVERYTHING you need. Its a great idea, a bunch of people have done it and i think you will be pleased. Do some checking to see if you will need to beef up the frame....with the 5.9 it is a must!
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2004 Chevrolet Suburban C1500 2001 Chevrolet 2500HD Crew 6.0 1999 Harley Davidson Electra Glide 1972 Chevrolet C-20 Custom Camper "Dump Truck" 1972 Chevrolet C-20 Suburban "Big Green" 1969 Chevrolet C-50 Wedge Hauler "Leonidis" 1966 C-10 2x4 short fleet 327 4 speed "Race Truck" 1952 Plymouth Cranbrook "Rican" (my grandfathers) 1931 Ford Model A Coupe "Black Beauty" 1930 Ford Model A truck "Club Cab" 4x4 Rottenwood Garage and Speed Shop.....where everything must be racy! It's not just a hobby..It's a LIFESTYLE!!! Thanks for nothing Barrett-Jackson You cant fix stupid or teach accountability! Time wasters, looky Lous and tire kickers are everywhere! |
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05-18-2010, 03:17 PM
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#9 |
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Registered User
Join Date: Aug 2008
Location: DFW, Texas
Posts: 389
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Re: Anyone thought about A cummins 4bt swap?
I say go for it. THere is a TON of info on 4bt swaps at...you guessed it 4btswaps.com
Im putting a 6bt in a 69 1/2 ton. Its a tight fit...not sure on the firewall differences with a blazer. The truck needed a high hump trans tunnel with the nv4500. A guy on here has one in a 70 (doesnt ever post here anymore) but he said hes getting darn near 30mpg with a NV4500, 12v Cummins 5.9 and a 3.08 gear set. I believe it. My buddy was getting 23-24 hand calculated in his 97 3/4 ton Dodge with a 3.73 rear. My truck wont be done until late this year, maybe early next. Im praying for 27mpg |
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05-18-2010, 05:06 PM
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#10 |
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6>8 Plugless........
 
Join Date: Sep 2007
Location: Prairie City, Ia
Posts: 17,139
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Re: Anyone thought about A cummins 4bt swap?
Just like 72freak said, try to purchase a P-30 chevy bread truck with one in it. Then you have everything you need. Most of the time you can pick up a complete truck for what some want just for the engine. I highly doubt you will regret it, and the 4bt's can still produce a lot of power and still get great mileage just like it's big brother.
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Ryan 1972 Chevy Longhorn K30 Cheyenne Super, 359 Inline 6 cylinder, Auto Trans, Tilt, Diesel Tach/Vach, Buckets, Rare Rear 4-link and air ride option Build Thread 1972 GMC Sierra Grande Longhorn 4x4 1972 Chevy Cheyenne Super K20 Long Step side tilt, tach, tow hooks, AC, 350 4 speed 1972 C10 Suburban Custom Deluxe 1969 Chevy milk truck 1971 Camaro RS 5.3 BTR STG3 Cam Super T10 1940 Ford 354 Hemi 46RH Ford 9" on air ride huge project Tired of spark plugs? Check this out. |
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