Just another LJ build - Page 165 - JeepForum.com
 
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post #2461 of 4124 Old 01-30-2014, 07:19 AM
Sundowner
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Originally Posted by redrelyt12 View Post

Speaking of turbo, the banks sidewinder kit might be something to look into, no?
It's an expensive kit in proportion to the power increase, in my opinion. Forced induction can only do so much without a worked-over top end; often, the head(s), cam and intake run out of airflow before the blower/turbo does... and if you solve those issues you often have to start addressing the lower end and rotating assembly. Much caps required.


If it's worth doing, then it's worth overdoing.

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post #2462 of 4124 Old 01-30-2014, 07:28 AM
redrelyt12
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Quote:
Originally Posted by Sundowner View Post
It's an expensive kit in proportion to the power increase, in my opinion. Forced induction can only do so much without a worked-over top end; often, the head(s), cam and intake run out of airflow before the blower/turbo does... and if you solve those issues you often have to start addressing the lower end and rotating assembly. Much caps required.
I haven't looked into engine swaps much, so I don't really know how many caps they would take. I figure a kit like this may negate some of the things needed to perform an engine swap like a hoist, welding mounts, transmission adapters etc. Just thinking out loud really, as I'm nowhere near a swap of any kind

I never make the same mistake twice - it's more like three or four times.
Build - http://www.jeepforum.com/forum/f22/unlimicon-build-1477723/
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post #2463 of 4124 Old 01-30-2014, 08:13 AM
Sundowner
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Quote:
Originally Posted by redrelyt12 View Post

I haven't looked into engine swaps much, so I don't really know how many caps they would take. I figure a kit like this may negate some of the things needed to perform an engine swap like a hoist, welding mounts, transmission adapters etc. Just thinking out loud really, as I'm nowhere near a swap of any kind
As with anything else, there are good and bad ways to go about it; likewise, there are cheap ways and expensive ways. The LS option is good because it's inexpensive, powerful and it can be emissions-legal without much work. The Pentastar offers a lot, too... if you can get it wired. Diesels and Hemi swaps... well, you better be on good terms with your Uncle Moneybags. Truth be told, there are countless options...and most of the expense for any of them seems to lie in the ancillary pieces, as you mentioned.

If it's worth doing, then it's worth overdoing.

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post #2464 of 4124 Old 01-30-2014, 08:35 AM
clintrivera
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Quote:
Originally Posted by Sundowner View Post
It's an expensive kit in proportion to the power increase, in my opinion. Forced induction can only do so much without a worked-over top end; often, the head(s), cam and intake run out of airflow before the blower/turbo does... and if you solve those issues you often have to start addressing the lower end and rotating assembly. Much caps required.
The big benefit to turbo power is power at elevation. As long as you have enough turbo, you can keep the same power at sea level as at 10,000'. You can't say that about a NA motor. Bigger consideration for people in Colorado or similar. Plus, if you haven't driven a turbo rig, the turbo whine and blow off valve sound is addictive.

The 4.0 only has a 8.8 to 1 compression ratio, so it makes a good candidate for boost.

I agree it's a spendy kit, but I've been eyeing it because even if I do all the work myself and find deals, an LS swap isn't exactly cheap either. Plus I have A/C and cruise control to deal with this time. Completely doable with an LS, but more stuff to deal with.

Realistically, if I did another LS swap it will be for the same primary reason I did it before. To get an automatic transmission.
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post #2465 of 4124 Old 01-30-2014, 11:08 AM
Sundowner
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Originally Posted by clintrivera View Post
The 4.0 only has a 8.8 to 1 compression ratio, so it makes a good candidate for boost.
That's a really good point. I wonder if some head/cam work would make that turbo setup a little more peppy...

If it's worth doing, then it's worth overdoing.

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post #2466 of 4124 Old 01-30-2014, 07:05 PM Thread Starter
G Beasley
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I think a turbo or supercharger would really wake up the old 4.0 , but the cost would put you at least half way to an engine swap .

On a different note if anyone happens to have a 2012 or newer manual JK harness laying around I know a guy interested in one

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post #2467 of 4124 Old 01-30-2014, 07:53 PM
AngryTJ
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I haven't really been following the whole motor talk but my vote is for a jet engine

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post #2468 of 4124 Old 01-30-2014, 07:55 PM
bobthetj03
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Quote:
Originally Posted by G Beasley View Post
I think a turbo or supercharger would really wake up the old 4.0 , but the cost would put you at least half way to an engine swap .

On a different note if anyone happens to have a 2012 or newer manual JK harness laying around I know a guy interested in one
What about the stupid curly-Q exhaust?

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post #2469 of 4124 Old 01-30-2014, 08:08 PM
clintrivera
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Quote:
Originally Posted by G Beasley View Post
I think a turbo or supercharger would really wake up the old 4.0 , but the cost would put you at least half way to an engine swap .

On a different note if anyone happens to have a 2012 or newer manual JK harness laying around I know a guy interested in one
Halfway to some engine swaps maybe. The average cost of just the pentastar engine is the cost of the turbo kit. The turbo kit makes a tiny bit less HP but more torque and with 1/4 of the labor if that.

Have you measured the engine yet? It's pretty wide since it's DOHC.

What have you figured out about the PCM? I don't think a different standalone PCM will work too well with the VVT without a lot of headache.

I'm pretty sure the gauges won't work the the pentastar PCM since they have a different bus so you will have to run both PCM's or go aftermarket on that.

Unless you have some sweet hookups with the engine, you can get a very nice AL 5.3 LS with goodies and get similar fuel economy, more horsepower, and much more torque at lower RPM. Pentastar is a great engine, but not one I would think of first for a manual transmission application and it's complexity doesn't seem fitting for an off road vehicle - especially off camber. My brother in law's JK had the oil light come on in Mickey's hot tub. Had to shut it off and winch out.
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post #2470 of 4124 Old 01-30-2014, 09:19 PM
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Quote:
Originally Posted by AngryTJ
I haven't really been following the whole motor talk but my vote is for a jet engine
Totes.

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post #2471 of 4124 Old 01-31-2014, 06:46 PM Thread Starter
G Beasley
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Quote:
Originally Posted by gspup View Post
Totes.
My goats ?



Tomorrows Jeeping

Differentials are broken in and ready for new fluid .Need to finish up a few other details so that its ready for the trip to Nashville ...

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post #2472 of 4124 Old 01-31-2014, 06:48 PM
OkLaHoMaTJ
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Originally Posted by G Beasley View Post
Differentials are broken in and ready for new fluid .Need to finish up a few other details so that its ready for the trip to Nashville ...
What break in procedure did you follow?

My Thread - http://www.jeepforum.com/forum/f22/another-lj-rubicon-thread-1516486/
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post #2473 of 4124 Old 01-31-2014, 06:57 PM Thread Starter
G Beasley
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Originally Posted by OkLaHoMaTJ View Post
What break in procedure did you follow?
Drove it home stopping along the way , and Kimbo took the kids to school in it . Nothing too fancy , but it got them warmed up and then they had plenty of time to cool off .

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post #2474 of 4124 Old 02-01-2014, 06:18 PM Thread Starter
G Beasley
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Changing the differential fluid tomorrow . Being as its synthetic I am very happy to have found a 40% off coupon for Advance at Retail me not . Also took the Jeep and trailer out for some county wide exploring ... and now its washed and put away until I head out on Monday .









This was the first time towing with the 5.13s and it was night and day from before . I can accelerate uphill with the trailer in 5th and 6th gear which will come in handy this summer when we head West .

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post #2475 of 4124 Old 02-01-2014, 08:02 PM
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Quote:
Originally Posted by G Beasley
Changing the differential fluid tomorrow . Being as its synthetic I am very happy to have found a 40% off coupon for Advance at Retail me not . Also took the Jeep and trailer out for some county wide exploring ... and now its washed and put away until I head out on Monday .

This was the first time towing with the 5.13s and it was night and day from before . I can accelerate uphill with the trailer in 5th and 6th gear which will come in handy this summer when we head West .
Damn that looks nice.
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