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Unread 08-27-2013, 01:50 AM   #1
scootter82
Registered User
2009 WK 
 
Join Date: Aug 2012
Location: Aurora, CO
Posts: 173
Just for grins

So I was looking for srt8 headers for a swap when I found this site selling 7.0L SRT8 crate engines. So, just for ****s and giggles, what would be the logistics involved in swapping my current 5.7L HEMI to this massive HEMI? They list WK as being compatible...

Edit: And a follow up question, I just found these headers on ebay. What do you guys think of them? Think they'd work well as an upgrade?

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Unread 08-27-2013, 06:02 AM   #2
Zlartibartfast
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2007 WK 
 
Join Date: Aug 2007
Location: Menchaca, Texas
Posts: 419
that stroker looks like a really cool way to spend $20K - don't forget you'll need to re-tune the ECU. They say it will fit your Jeep just fine.

the headers look nice too, and they're a lot cheaper but if you want "618 HorsePower & 595 Ft. lbs. of Torque" you'll need more than just headers
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Unread 08-27-2013, 09:01 AM   #3
ca07wk
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2007 WK 
 
Join Date: Aug 2012
Location: San Diego, CA
Posts: 985
the only difference in the 5.7L and the 6.1L is extra cooiling and oil flow through the block, other then that they are very similar. you will most definitely need custom tune from someone like hemifever. and dont forget a built trans and t-case
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Unread 08-27-2013, 09:17 AM   #4
90grandoneer
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2006 WK 
 
Join Date: Apr 2008
Location: City of Trees
Posts: 1,728
Yes, it will all fit in place of a 5.7 but, at a minimum as said above, you'll need to have a CMR tune done on the PCM (must eliminate EGR, adjust A/F ratio, shut off MDS, etc.). Also, the exhaust is good (but a PITA to install/setup), and the transmission won't support that kind of power, so you'd need a beefed up unit....perhaps a Sheradon Stage III (~$3000). You wouldn't have to do the tranny immediately, but it certainly wouldn't withstand too many WOT runs. If I were to do this, I'd find a junk yard 6.1 (probably Cleveland Pick-A-Part) and build it myself (my way...haven't done this in a long time) for probably a little more than half what they're charging. For sure I'd add the MDS lifters/solenoids and retain the MDS (probably use the same cam I already have in it), and probably also make a custom mount for the EGR (reduces combustion temperatures), so I wouldn't have trouble with the "smog police". I'd leave my tranny alone for now (I've already improved it a little), and then eventually pick up a Stage III. I'd have to cut the flanges off my custom tubular headers and have 6.1 flanges welded on and then re-ceramic coated too. Really would be a fun project though.....my kind of stuff. It only takes $$$, and I've pretty much committed (after 4 years of "improvements") to my wife that I'll quit messing with it now.....at least until I can think of something else to do, LOL!!
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