Turbocharging my 3.8
JK Junkie
Joined: Feb 2013
Posts: 2,013
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From: West Richland Washington
Differences: axle size, suspension type, wheelbase, track width. That's a lot of variable that reduce the physics applied to the JK tires.
Main goal of towing capacity is to stop and turn safely. Second goal is to pull up a hill without destroying vehicle. Jk is limited by #1, truck by #2.
And its 200up, but like 350-400 tq. The tq matters in towing which generally has trouble starting out. Hence why all large trucks rub diesel engines, with 300hp and 1000+ tq.
Ymmv
JK Newbie
Joined: Apr 2012
Posts: 26
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From: Wellington, fl
I pull a 22' Outrage at least once a month! The only question is stopping. Lol
Thread Starter
JK Enthusiast
Joined: Oct 2012
Posts: 109
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From: Lithia, FL
JK Enthusiast
Joined: Jul 2012
Posts: 192
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From: United States
Ok the gm 12bolt has an 8.5 in ring gear so that's doesn't factor in. My truck as about same wheel base as my jku when I park next to is the width is nearly identical and old smalls blocks were not close to 300-400 ft lb tq. That's big block numbers. Factory small blocks were mid to upper 2's depending on year. Shit modern small block make twice the power and tq and theu just got to 300-400 tq. And for the large trucks. My bros old 12 valve cummins could tow 16-17k all day and it had around 400 tq stock. 3 years ago the big boys had 600. Dodge currently holds the crown with 850 but its all just braggin rights.
/end thread derailment
Nice boat!
JK Enthusiast
Joined: Sep 2011
Posts: 309
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From: Glendale,az
I pulled a 24ft Calabria which is not a light boat by any means. Forced induction free with large auto trans cooler and teraflex big brake kit. It wasn't gonna win any races but never pushed the jeep around. The FI will def be apart of next jeep i get!
JK Junkie
Joined: Feb 2013
Posts: 2,013
Likes: 0
From: West Richland Washington
There are other things to consider. Axle strength/loading. Tire rating (c,d,e) tire psi, etc. Point is a lot of engineering goes into tow limits, and though we don't know the reason, if jeep could sell a jk labelled to pull 7k lbs I can't see why they wouldn't do it.
/end thread derailment
Nice boat!
Last edited by Tooadvanced; Apr 26, 2013 at 03:11 PM.
JK Super Freak
Joined: Jun 2011
Posts: 1,552
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From: Riverside, Ca
Originally Posted by Captaincalf
I would not have tried this before the addition of the turbo...<img src="https://www.jk-forum.com/forums/attachment.php?attachmentid=449597"/><img src="https://www.jk-forum.com/forums/attachment.php?attachmentid=449598"/>
Very cool mod though, wish I had a turbo
Last edited by SaFFFari; Apr 26, 2013 at 03:07 PM.
JK Super Freak
Joined: Mar 2010
Posts: 1,246
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From: Out of Conntrolicut
I would not have tried this before the addition of the turbo...Attachment 449597Attachment 449598
Melted piston's suck 
