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Old 07-12-2011, 05:55 PM   #1
jss
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Chevrolet LS in a JK (All Aluminum V8)

We are working on a Kit to put a Chevrolet LS V8 in a JK, we are going to try and do it to ways.
#1 Is a kit that will reuse wiring and computers, Exhaust, Radiator, new Engine Mounts and so on, to keep the cost down.
#2 Is a kit that we will have all new, computers, Exhaust, Radiator, wiring, engine mounts and so on.
We are going to base the kits on Truck style engines, but any LS engine will work.
We are going to have kits and parts for the car style engines, we just need to know what engine every one would like.
We think the 5.3L with be the best and the cheapest, but that is what i think.
But their is the other engines in the line up like the 6.0L/6.2L and the LS1,LS2,LS3,LS7,LS9, a lot of engines to choose from.
So we are going to start with the truck engine and the engine we are using in are GuineaPig is a 6.2L with a 6L80 Trans.
So we are looking for some info, on what engine you would like in your Jeep.
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Old 07-12-2011, 06:19 PM   #2
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5.3L or 6.2L makes the most sense. They can be found with low miles relatively cheap.
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Old 07-12-2011, 07:01 PM   #3
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what are the engine ### for each?
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Old 07-12-2011, 07:55 PM   #4
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You guys going to offer a manual trans option?
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Old 07-12-2011, 08:12 PM   #5
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Also, as far as engines are concerned, the LS1's are a dime a dozen and can be found and had for relatively cheap (even brand new ones from GM arent terribly expensive). An LS2 would be nice, but they're hard to come by and GM doesnt offer them new anymore. So the next choices would be either the LS3 which is a little pricy but has pretty damn good HP numbers or the 6.2 L92 motor. I think the LS1 is gonna be the most bang for the buck but thats just my .02
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Old 07-12-2011, 09:15 PM   #6
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LS in a JK

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Originally Posted by Topgun863 View Post
You guys going to offer a manual trans option?
Their is no good trans out their, but we have been talking to Tremec about a T56 but it is only talk right now.
www.jeepspeedshop.com
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Old 07-12-2011, 10:15 PM   #7
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Their is no good trans out their, but we have been talking to Tremec about a T65 but it is only talk right now.
www.jeepspeedshop.com
You mean T56 right? I hope you guys can come up with something cause I really like the idea of having a LS motor in the Jeep but would really only consider it if I could keep my manual trans.
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Old 07-12-2011, 11:01 PM   #8
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Here is a good comparison between all of the different engines...

LS 5.3L 320HP/340TQ
L92 6.2L 403HP/417TQ
LS7 7.0L 505HP/470TQ
LS9 6.2L Supercharged 638HP/604TQ

Hemi 5.7L Truck Engine 345HP/375TQ
Hemi 5.7L VVT Truck Engine 390HP/407TQ
Hemi 6.1L GC SRT-8 425HP/420TQ
Hemi 6.4L VVT GC SRT-8 465HP/465TQ

3.8L V6 Minivan 202HP/237TQ
3.6L V6 Pentastar *290HP/260TQ
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Old 07-13-2011, 03:43 AM   #9
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Quote:
Originally Posted by wranglerblackout08 View Post
Here is a good comparison between all of the different engines...

LS 5.3L 320HP/340TQ
L92 6.2L 403HP/417TQ
LS7 7.0L 505HP/470TQ
LS9 6.2L Supercharged 638HP/604TQ

Hemi 5.7L Truck Engine 345HP/375TQ
Hemi 5.7L VVT Truck Engine 390HP/407TQ
Hemi 6.1L GC SRT-8 425HP/420TQ
Hemi 6.4L VVT GC SRT-8 465HP/465TQ

3.8L V6 Minivan 202HP/237TQ
3.6L V6 Pentastar *290HP/260TQ
HP depends on the application/year in the LS1. The C5 Vettes ranged from 345-350 HP for the LS1.

It's a solid and inexpensive motor as other s have mentioned.Minor tweaks to the original breathing consistently yielded more HP than posted above.

I don't recall the specific weight, but the aluminum block was significantly lighter....


The next jump IMHO would be the LS3 at approx 430+ HP.

The LS6 is way to expensive, granted there is a quarter ton of HP and torque I'd question the value of such an insane power plant.

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Old 07-13-2011, 06:50 AM   #10
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5.3 or 6.2 please
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Old 07-13-2011, 09:01 AM   #11
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Quote:
Originally Posted by mickbee View Post
HP depends on the application/year in the LS1. The C5 Vettes ranged from 345-350 HP for the LS1.

It's a solid and inexpensive motor as other s have mentioned.Minor tweaks to the original breathing consistently yielded more HP than posted above.

I don't recall the specific weight, but the aluminum block was significantly lighter....


The next jump IMHO would be the LS3 at approx 430+ HP.

The LS6 is way to expensive, granted there is a quarter ton of HP and torque I'd question the value of such an insane power plant.

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All of those numbers are from the truck engines, The car engines will produce more power. I was going to add all of the different weights of the engine blocks but I couldn't find very accurate numbers.
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Old 07-13-2011, 04:38 PM   #12
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6.0L

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Old 07-27-2011, 07:54 AM   #13
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5.3L and the ability to reuse our 6spd manual.
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Old 07-27-2011, 07:35 PM   #14
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LS in a JK

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5.3L and the ability to reuse our 6spd manual.
The only thing is that the 3.8L Trans is no good and not strong enough for a V8, I think.
We would have to find a better trans.
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Old 07-27-2011, 10:13 PM   #15
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From Novak Adapters site:
"The NSG370 is quite strong, featuring a 272 ft. lbs. input torque capacity, as claimed by the manufacturer. Output torque limits are between 1100-1300 ft. lbs., making it a good match for the NP231 and NP241OR transfer cases. The construction of the gears and visibly good level of engineering within the transmission would suggest that it should be quite durable. "

http://www.novak-adapt.com/knowledge/nsg370.htm


So even with the 5.3L the input torque rating is exceeded.
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Old 07-27-2011, 10:46 PM   #16
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LS in a JK

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Originally Posted by BenFoo View Post
From Novak Adapters site:
"The NSG370 is quite strong, featuring a 272 ft. lbs. input torque capacity, as claimed by the manufacturer. Output torque limits are between 1100-1300 ft. lbs., making it a good match for the NP231 and NP241OR transfer cases. The construction of the gears and visibly good level of engineering within the transmission would suggest that it should be quite durable. "

http://www.novak-adapt.com/knowledge/nsg370.htm


So even with the 5.3L the input torque rating is exceeded.
The other problem is the bellhousing is very small, even if we made an adapter to bolt it up.
I don't think the flywheel or the clutch will fit, from a GM in that bellhousing.
I will have to take another look.
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Old 07-28-2011, 09:21 AM   #17
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the answer is our NSG370 has a small bell housing for the 3.8 but the NSG370 for the 4.0 in a 06 and 05 jeep works with novaks adaptar mounted to a 5.3

another option is switching out the front case which is a 500 dollar option.


my plan is to find a tj NSG370 and sell my NSG370 then the swap is done. makes sence too since i can complete the drivetrain and slip it in without losing my jeep.
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Old 07-29-2011, 04:34 PM   #18
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What about the 4.8 VVT? I have that in my '99 that is strong, efficient, runs cool, and flat out moves my truck - loaded or not.
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Old 07-29-2011, 05:40 PM   #19
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LS in a JK

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What about the 4.8 VVT? I have that in my '99 that is strong, efficient, runs cool, and flat out moves my truck - loaded or not.
The only problem is the same year or new, Engine deal. But i won't say any thing if you don't.
The engine will work other wise.
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Old 08-05-2011, 09:38 AM   #20
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Subscribed. Anything would be better than this heap we got in it now. My vote is for the bang-for-the-buck 5.3.
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Old 08-05-2011, 09:53 AM   #21
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5.3 would be my pic if I had a choice. Always been a fan of these engines
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Old 08-05-2011, 01:05 PM   #22
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GM vortech engines are also the same basic idea as an LS motor just not aluminum and out of trucks etc.
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Old 08-14-2011, 01:22 PM   #23
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LS in a JK

We are going to start showing are kit parts, this is a wiring harness we built from are Donner, all used.
We are going to show the cheaper kit first, so their will be some reusing of parts.
We are putting together a home builder kit, we have most of it done but not all of it.
This will be easy almost like putting a LS in a TJ but easier.
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Old 08-14-2011, 02:55 PM   #24
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I can't wait to see this. I have high hopes
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Old 08-14-2011, 05:33 PM   #25
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Subscribed to find out about a manual trans option Mark W.
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