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Go Back JeepForum.com > General Jeep Forums > Jeep Builds > Jeep YJ 4BT Cummins build!!

ZONE 4.25" combo lift for TJ available at Rockridge4wANOTHER Rockridge4wd Creation!! Spare Tire Carrier Delete Rough Country Jeep Suspension Deals at Rockridge 4WD!

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Unread 10-23-2013, 09:14 PM   #211
lobi
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2005 TJ Wrangler 
 
Join Date: Sep 2010
Location: Nicholasville, Ky
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small world hello from Nicholasville im always looking for someone to go wheeling with holler if you ever want some one else to go with

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Unread 10-24-2013, 11:30 AM   #212
ThomasYJ
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1993 YJ Wrangler 
 
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This is so awesome!! Just sat here and read through all of it. Good job on doing a lot of the fab work yourself! Subscribed.
Funny thing is that I've watched your videos so many times looking for Cummins Jeeps on YouTube, before I even found this thread. As soon as I started reading I thought to myself, "I know this Jeep...."

I'm saving up for the swap right now, have my Jeep in storage. With the cost of everything I want to do I'm probably going to have to budget between 15-20 until all is said and done.

On a side note, I'm glad the 3:55 and 35s work out so well. I was leaning between those or 3.73.


I'll be keeping my eye out for more! opcorn:
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Unread 10-25-2013, 06:52 PM   #213
ThomasYJ
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Quick question:
What'd you do about the fuel filler, seeing as diesel nozzles are bigger. Just drill it out, or what?
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Unread 11-24-2013, 07:58 PM   #214
Jeep-1995
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Cummins YJ

ABSOLUTELY AMAZING!!!!! this is by far the SEXIEST YJ i have ever seen!!!
Dad and I are talking about doing this too. i want to do it basically the exact same but with a hood stack! what millage are you getting and what gearing are you going with?
We had the same idea about pulling a Cummins from a bread truck but we wernt sure about a transmission. i didnt know the 6BT 12 Valve tannies lined up so that helps a lot!! thanks for the great write up and hopefully next summer we will be able to tackle the project!
That is inspiring to see a teenager doing all this, i am 19 and in college and this is my dream build but i always thought older mechanics who owned a shop, were the only ones who got to successfully do this!!

great job once again!!!
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Unread 03-02-2015, 02:26 PM   #215
vespo94
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1988 YJ Wrangler 
 
Join Date: Mar 2015
Location: St. Marys, Georgia
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I have a 88 yj with a 4" lift and im planning on using a 4bt and nv4500. Probably gonna run 3.73 gears. What would be a good donor truck for axles and intercooler and all that good stuff? i was thinking ram 2500/3500?
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Unread Yesterday, 12:03 AM   #216
y2k-fxst
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1964 CJ6 
 
Join Date: Sep 2012
Location: North English, Iowa
Posts: 251
Quote:
Originally Posted by vespo94 View Post
I have a 88 yj with a 4" lift and im planning on using a 4bt and nv4500. Probably gonna run 3.73 gears. What would be a good donor truck for axles and intercooler and all that good stuff? i was thinking ram 2500/3500?
You might want to look into a 1" body lift also for hood clearance so the motor does not have to be down so low.

Seen some guys using the inter-cooler out of the doner bread truck, Audi TTS, or a Izuzu NPR.

For a radiator I am looking at http://www.speedwaymotors.com/Speedw...FUo6gQodYRsAKQ due to the fact that both the inlet and outlet is on the passenger side and I won't have to run the upper radiator hose across like most radiators.

Would stick with the smaller axles like Dana 44's due to the fact you lose so much ground clearance under the pumpkin when you get into 3/4 and 1 ton stuff unless your running 37"+ tires.

Probably not going to get a lot of responses on this thread as it has been dead almost 1.5 years but, at least you are reading!
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Unread Yesterday, 06:30 PM   #217
ThomasYJ
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What size tires you planning on running? With 3.73 / 4.10 that's a fairly decent ratio for 37s. That's what I'll be putting on mine once I get the tons under my Heep. As for donors, if you dont mind a shorter driver side tube, late 80's early 90's F350 have a 60/ 10.25 combo which is pretty bulletproof. If you outboard your front springs you can keep the axle width as is, if that's what you're going for.
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4bt , cummins , jeep , nv4500 , YJ

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