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Kenne Bell Supercharger
http://www.lostjeeps.com/forum/phpBB3/viewtopic.php?f=1&t=60726		 Page 1 of 1
Author:  greenmonster91 [ Mon May 16, 2011 1:53 pm ]
Post subject:  Kenne Bell Supercharger
Has anyone been able to find or does anyone currently have a Kenne Bell supercharger for the 3.7 KJ, ive been looking for one of these for the longest time but have not been able to find one. they say they stopped production due to insufficient demand but with the torque and horsepower curves they show after dynotesting a kj its almost imposable to not want one!
http://www.kennebell.net/superchargers/ ... bert37.htm

if anyone has it what has been your experience with it?
Author:  DirtyKK [ Mon May 16, 2011 2:01 pm ]
Post subject:  Re: Kenne Bell Supercharger
its because the engine was poorly designed for boost, itll grenade itself.
Author:  audiboy86 [ Mon May 16, 2011 2:10 pm ]
Post subject:  Re: Kenne Bell Supercharger
Last one i saw was on ebay and i can't remember if anyone on here has one but i do remember the head gasket had to be replaced before it was installed. Or you would blow it sky high from to much pressure. But there are quite a few companies that make turbos for them now though.
Author:  liquidxit2 [ Mon May 16, 2011 2:54 pm ]
Post subject:  Re: Kenne Bell Supercharger
In order to properly boost ANY engine a rebuild to suit boost is required unless you like breaking things. That includes pistons, rings, rods, cams, valve job, porting and honing. Even if done correctly sometimes the innate design of an engine will come back to bite you. Kinda like trying to be a professional football player but your only 5'7" and 150lbs, you can try and roid up but youll most likely die.

DirtyKK wrote:
its because the engine was poorly designed for boost, itll grenade itself.


As are all naturally aspired engines. While some handle boost in stock configurations better then others, none are designed for boost. IMHO running boost on what came from the factory naturally aspirated is an act of luncay and a test of futility.
Author:  mikey1273 [ Mon May 16, 2011 3:24 pm ]
Post subject:  Re: Kenne Bell Supercharger
As others said unless the engine was designed with a turbo or super charger as an option in mind I wouldn't try adding one until someone else proves it works as it should with out blowing it to kingdom come. Don't seem like the case with the 3.7
Author:  greenmonster91 [ Tue May 17, 2011 12:23 am ]
Post subject:  Re: Kenne Bell Supercharger
i have experience working with turbos and i have heard some horror stories that when people just strapped on the supercharger that they destroyed their blocks or cylander heads because the cast pistons were far to weak to handle any kind of boost. i was planning on replacing with some JE forged pistons, ive already replaced the cam and lifters with a COMPcam parts. i really just want to know if anyone has made it work and if so was the performance worth the price, also would a turbo setup be a better option?
Author:  audiboy86 [ Tue May 17, 2011 11:16 am ]
Post subject:  Re: Kenne Bell Supercharger
The turbo would be easier to tune and adjust the amount of boost being forced into the motor. Also Garrett turbos are rebuildable easy to upgrade the only pain really is running the exhaust. Also dont forget when you upgrade the pistons to do the connecting rods and all the bolts.
Author:  daspes [ Tue May 31, 2011 5:08 pm ]
Post subject:  Re: Kenne Bell Supercharger
liquidxit2 wrote:
IMHO running boost on what came from the factory naturally aspirated is an act of luncay and a test of futility.


I'm full on nuts then... Over 40k at 8 psi on the JK, completely stock internals.

All the rest of the info is true, the KJ's factory internals can't handle the pressure. There are a couple of threads on the board about what is required.
Author:  Sir Sam [ Wed Jun 01, 2011 12:40 am ]
Post subject:  Re: Kenne Bell Supercharger
Pff superchargers.......real men have turbochargers.
Author:  tjkj2002 [ Wed Jun 01, 2011 8:21 am ]
Post subject:  Re: Kenne Bell Supercharger
Sir Sam wrote:
Pff superchargers.......real men have turbochargers.

Oil burner take to turbo's better and gas likes superchargers better.
Author:  audiboy86 [ Wed Jun 01, 2011 11:25 am ]
Post subject:  Re: Kenne Bell Supercharger
Yes but a stock oil burner always takes better to pressure then stock gasers. I am not bashing the gasers just saying. I mean i do own a gaser it is a 1968 Camaro convertible and drive a Mini Cooper S on occasion.
Author:  Beep Beep [ Sun Jun 05, 2011 9:43 pm ]
Post subject:  Re: Kenne Bell Supercharger
audiboy86 wrote:
The turbo would be easier to tune and adjust the amount of boost being forced into the motor. Also Garrett turbos are rebuildable easy to upgrade the only pain really is running the exhaust. Also dont forget when you upgrade the pistons to do the connecting rods and all the bolts.


A supercharger would be much easier to regulate boost.
Turbo's tend to creep and fluxuate pressure in weather change and elevation.
Author:  liquidxit2 [ Mon Jun 06, 2011 8:56 am ]
Post subject:  Re: Re: Kenne Bell Supercharger
daspes wrote:
liquidxit2 wrote:
IMHO running boost on what came from the factory naturally aspirated is an act of luncay and a test of futility.


I'm full on nuts then... Over 40k at 8 psi on the JK, completely stock internals.

All the rest of the info is true, the KJ's factory internals can't handle the pressure. There are a couple of threads on the board about what is required.


Like I sadi some engines can handle boost better then others in stock form. Are you crazy for doing it to a stock 3.8l? Yes. :P

Sent from my PG06100 using Tapatalk
Author:  KJ_WHEELER_2010 [ Fri Jun 10, 2011 9:29 pm ]
Post subject:  Re: Kenne Bell Supercharger
I would deff be intrested in the supercharger. I'd go with the turbo but dont they only produce power at high RPMs?Anyone know of any kits for supercharger or turbo setup?
Author:  Beep Beep [ Sat Jun 11, 2011 7:57 am ]
Post subject:  Re: Kenne Bell Supercharger
Turbos are more efficient than superchargers. They have a wider powerband. Yeah, many turbos are for high revving applications, but a small turbo like a 14b or 16g (Mitsubishi/Subaru) you can achieve a small and quick spool time and get full boost by 2200 RPM on a 2.0L. It's all about matching.
Author:  audiboy86 [ Fri Jun 17, 2011 7:05 pm ]
Post subject:  Re: Kenne Bell Supercharger
The turbo on a CRD comes in around 1000 to 1200 RPM but it is a VGT a small ball bearing turbo would come in around 1200 to 1500 RPM that is on a diesel applications where exhaust pressures are higher. Gassers a good size turbo i would say around 2400 to 3200.
Author:  tjkj2002 [ Fri Jun 17, 2011 8:31 pm ]
Post subject:  Re: Kenne Bell Supercharger
Beep Beep wrote:
Turbos are more efficient than superchargers. They have a wider powerband. Yeah, many turbos are for high revving applications, but a small turbo like a 14b or 16g (Mitsubishi/Subaru) you can achieve a small and quick spool time and get full boost by 2200 RPM on a 2.0L. It's all about matching.

Maybe more efficient but a supercharger makes more power,and can make almost max boost at idle or just past idle.

The most powerful(and quickest) land vehicles on the planet use a supercharged V8,a turbo would not spool up fast enough or even survive on a top fuel engine.
Author:  audiboy86 [ Fri Jun 17, 2011 11:22 pm ]
Post subject:  Re: Kenne Bell Supercharger
Yes surperchargers have a great top end speend and off the line but with the turbo you will get more torque. And better fuel milage a supercharger is always on or just right below it. With a VGT turbo (variable geometry turbo) you will get and almost instant amout of boost like the supercharger.
Author:  Sir Sam [ Mon Jun 20, 2011 9:15 pm ]
Post subject:  Re: Kenne Bell Supercharger
tjkj2002 wrote:
Beep Beep wrote:
Turbos are more efficient than superchargers. They have a wider powerband. Yeah, many turbos are for high revving applications, but a small turbo like a 14b or 16g (Mitsubishi/Subaru) you can achieve a small and quick spool time and get full boost by 2200 RPM on a 2.0L. It's all about matching.

Maybe more efficient but a supercharger makes more power,and can make almost max boost at idle or just past idle.

The most powerful(and quickest) land vehicles on the planet use a supercharged V8,a turbo would not spool up fast enough or even survive on a top fuel engine.


Thanks for clearing that up. I'm going to go out and get in one of my most powerful and quickest land vehicles on the planet which happens to be a top fuel dragster Jeep.
Author:  liquidxit2 [ Tue Jun 21, 2011 9:13 am ]
Post subject:  Re: Re: Kenne Bell Supercharger
tjkj2002 wrote:
Beep Beep wrote:
Turbos are more efficient than superchargers. They have a wider powerband. Yeah, many turbos are for high revving applications, but a small turbo like a 14b or 16g (Mitsubishi/Subaru) you can achieve a small and quick spool time and get full boost by 2200 RPM on a 2.0L. It's all about matching.

Maybe more efficient but a supercharger makes more power,and can make almost max boost at idle or just past idle.

The most powerful(and quickest) land vehicles on the planet use a supercharged V8,a turbo would not spool up fast enough or even survive on a top fuel engine.


While ill agree that most times a supercharger will make boost faster. The last turbo car I owned had a turbo that was well over twice the flow over the stock turbo and i was able to reach 18psi instantly when the hammer was down. If you have the right mods to support the turbo and the right engine a turbo can be instant and stay efficient all the way to your shift point.

But real world use unless we are talking diesels or certain fast cars I would opt for a supercharger. For jeeps, trucks or large displacement its just easier to use a super charger as the aftermarket has pushed us that way. Finding a turbo charger setup for a 500ci engine is a custom job. Finding a supercharger leaves you with a few options and a much cleaner and simpler install.

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