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Justin
Dodge Dakota
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12/16/2002
22:37:44

Subject: Kenne Bell s/c on a 4.7 auto?
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Would it be ok to install a KenneBell s/c on my stock 4.7? I have a few mods; intake;70mm TB; headers;IAT;TPS.95;HO cams; flomaster;4:56 gears.
I am worried about the motor, would 6-7psi of boost from a K.B. s/c hurt my motor. I dont plan on going over 6-7psi (factory kenne bell settings). Any input would help.


Thanx,

Justin



notchlx
Dodge Dakota
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12/17/2002
00:50:04

RE: Kenne Bell s/c on a 4.7 auto?
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Justin,

With your mods, you would be safe within your limits running 6-7psi...

However, with the addition of your mods you have done now mixed in with 6psi, I would change the factory injectors out for some higher flowing squirters.

May not be recquired, but what better insurance?
Dyno tune if it proved to be the injectors were too much, you could do away with the auxillary injectors with the kit, assuming you had a high flow fuel pump in-line.

Just don't ever want to run in a lean situation, especially with the KB's...Poof!

Max Boost at low RPM+lean= bye bye motor.



j
GenIII
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12/17/2002
10:57:06

RE: Kenne Bell s/c on a 4.7 auto?
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Make sure you fill out the form informing KB about all your mods when you order the s/c. They will flash your pcm accordingly. The thing about larger tb's with the KB is, I've measured the inlet to the s/c and I think it was smaller than 70mm. Think it was like 68mm but don't remember for sure.

2000 4.7 CC auto, clear corners, Magnaflow catback, Kenne Bell s/c.

Chipster
Dodge Dakota
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12/17/2002
11:21:46

RE: Kenne Bell s/c on a 4.7 auto?
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Thats why Kenne Bell says that a larger
throttle body won't make any HP. Because his
SC is limited to 70mm. So anything larger that
70mm makes no difference.



Justin
Dodge Dakota
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12/17/2002
22:11:33

RE: Kenne Bell s/c on a 4.7 auto?
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j, how much of a difference did you feel. I know that it has to be a lot, but was it a difference or was it a hell of a difference. Did you change any internal parts like pistons, head gaskets, etc, and have you had any problems with it?



Thanx,


Justin



j
GenIII
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12/18/2002
01:52:44

RE: Kenne Bell s/c on a 4.7 auto?
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It was a hell of a difference. I think it's the best way to go if you have an auto. I didn't change anything. It's designed to work on a totally stock engine, but they will send you a form to fill out to list any mods you have. Only problem I've had is some pinging under full boost.
I live in california, and the highest octane I can find is 91. I know others with the same kit and they are not having any pinging. I think jeepsunlimited.com has an article about the 4.7 kit as well as the installation manual. Check it out. Good luck.

2000 4.7 CC auto, clear corners, Magnaflow catback, Kenne Bell s/c.

Justin
Dodge Dakota
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12/18/2002
07:26:51

RE: Kenne Bell s/c on a 4.7 auto?
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Thanx j, hope I dont get pinging from mine. I live in North Carolina so 93 is avalible, also did you do the optimizer (2), or did it come with the s/c kit?



Thanx,

Oh, and one more thing. When installing the s/c does it do away with the intake manifold because in the picture it looks that way, and I take it that I get to use my 70 mm TB.

Justin



xplikt
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12/18/2002
08:25:19

RE: Kenne Bell s/c on a 4.7 auto?
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Yupp, bye bye manifold.

-Mike
http://www.dodgetruckworld.com/xplikt/
2002 2WD RC SLT 4.7L 5spd 3.92 LSD
MBRP Single in/out, straight piped 3rd cat, turndown tip
Hotchkis swaybars and springs
Bilstein custom tuned shocks
Roadmaster Active Suspension
Shaved emblems and antennae

j
GenIII
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12/18/2002
10:03:39

RE: Kenne Bell s/c on a 4.7 auto?
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xplikt's right, bye bye manifold. Same goes for your cold air intake (if you have one). And you can use your tb. The kit comes with the optimizer 2 and you will also have to send in your pcm to be flashed. A 180 t-stat is also included in the kit.

2000 4.7 CC auto, clear corners, Magnaflow catback, Kenne Bell s/c.

Justin
Dodge Dakota
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12/18/2002
12:12:53

RE: Kenne Bell s/c on a 4.7 auto?
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Cool, thanx for the input guys, now that I have got some input from someone who has a KB s/c on their 4.7 and has had no problems, and loves the hell out of it puts my mide at ease. Oh and xplikt, when are you getting your 4:56 gear put it, or are you still getting it? havent had any probs out of mine. And j do you think that the 70mm TB, headers, HO cams , and flowmaster exhaust will help the s/c pull and, run harder?



Thanx,


Justin


01;QC;4.7;auto4:56
IAT;TPS.95;HO cams
headers;3rd cat deleted
flomaster


One more thing I was also thinking about putting the underdrive pulley on, has anybody heard what kind of gains to expect, Iam pretty sure that it would go nice with the KenneBell.



notchlx
Dodge Dakota
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12/18/2002
12:20:19

RE: Kenne Bell s/c on a 4.7 auto?
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Man...4:56 gears and a twin-screw Blower...

Are you planning on running 28"x11" slicks around town?

Holy terror Batman. Sounds like fun.

J. Pinging under full boost? Oh my. Might want to do something quick about that..Not good..



xplikt
GenIII
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12/18/2002
14:07:06

RE: Kenne Bell s/c on a 4.7 auto?
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Justin, my gears should be shipping out today or tomorrow actually! Randy just got them in this last weekend.

notchlx, that's been my goal: KC S/C, 4.56s, slicks, and KRC cams.

28"x11" slicks around town?

I was.

-Mike
http://www.dodgetruckworld.com/xplikt/
2002 2WD RC SLT 4.7L 5spd 3.92 LSD
MBRP Single in/out, straight piped 3rd cat, turndown tip
Hotchkis swaybars and springs
Bilstein custom tuned shocks
Roadmaster Active Suspension
Shaved emblems and antennae

j
GenIII
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12/18/2002
14:17:00

RE: Kenne Bell s/c on a 4.7 auto?
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Yeah, I was all set to install my water injection kit last weekend, but some a$$hole STOLE it (?!)
I have no idea why they took it. They probably don't know what it's for. They don't have the jets or tubing. Now I have to re-order one =(.

2000 4.7 CC auto, clear corners, Magnaflow catback, Kenne Bell s/c.

notchlx
Dodge Dakota
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12/18/2002
14:35:30

RE: Kenne Bell s/c on a 4.7 auto?
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Ouch, sorry to hear that...

Let us know when you get everything on..The cooler temps in there the better.

Sounds good.

Xplikt...You want a big block don't you? Cause that's what it will feel like...Yank the sway bar and put skinnies on the front...You might be able to tote the front tires. ;)



xplikt
GenIII
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12/18/2002
16:25:09

RE: Kenne Bell s/c on a 4.7 auto?
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So I have a slight case of cube envy, nothing forced induction can't fix.

-Mike
http://www.dodgetruckworld.com/xplikt/
2002 2WD RC SLT 4.7L 5spd 3.92 LSD
MBRP Single in/out, straight piped 3rd cat, turndown tip
Hotchkis swaybars and springs
Bilstein custom tuned shocks
Roadmaster Active Suspension
Shaved emblems and antennae

Justin
Dodge Dakota
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12/18/2002
21:25:52

RE: Kenne Bell s/c on a 4.7 auto?
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So does that mean that I will need a inercooler for my set up? I know that you live in Cal. j, so the temp. is gonna defintly de higher. They say on the KB web page that intercoolers are not needed because of the way the s/c keeps it much cooler then any other s/c set up, but a intercooler wouldnt hurt. So what do you think. As I said I live in North Carolina temp. in the summer ava. (in the highs now) around 90-95 degrees, do I need a intercooler, or some coolant device?

I plan on putting some Kumho acsta 712's on my truck, anybody heard anything about the underdrive pulleys?


Thanx,


Justin



xplikt
GenIII
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12/18/2002
22:12:18

RE: Kenne Bell s/c on a 4.7 auto?
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Intercoolers are pretty spendy. If you are only running the default amount of boost form the Kenne Bell supercharger, I wouldn't go for an intercooler. Intercoolers work great, but for this application it wouldn't be worth the money to get one setup in your truck. For small boost applications, Kenne Bell sells a water injection that works pretty good. Not reccomended on higher boost applications, but for 6-7, I have heard great things about it.

There are other ways, less expensive to fight detonation. A good cooling system is a essential. The kit comes with a 180 T-stat and that helps some too. You can upgrade your radiator to one twice it's current size for 250 shipped. I put a large hole through my stock one, so I have one. Anything that brings cooler air to your filer and engine compartment.

Another way, but somewhat expensive, is clean up your heads and block. You can do this yourself if you're daring or have a shop do it. Either way, it should be cheaper than an intercooler.

I like intercoolers, but they just don't seem worth it on a small boost application.

Justin, if you have an underdrive pulley with a supercharger, you will be underdriving the supercharger. That's what the replacement crank pulley does to everything. The supercharger isn't excluded. Instead of the 6 psi. the Kenne Bell kit would produce, it would actually be less. So you would need a smaller pulley for the supercharger to produce the 6 psi you would have gotten without the underdrive crank pulley.

-Mike
http://www.dodgetruckworld.com/xplikt/
2002 2WD RC SLT 4.7L 5spd 3.92 LSD
MBRP Single in/out, straight piped 3rd cat, turndown tip
Hotchkis swaybars and springs
Bilstein custom tuned shocks
Roadmaster Active Suspension
Shaved emblems and antennae

xplikt
GenIII
 User Profile


12/18/2002
22:25:22

RE: Kenne Bell s/c on a 4.7 auto?
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I got my pulley before I decided I was getting a supercharger. If you plan on a supercharger, skip the pulley.

On a side note, they actually sell overdrive pulleys to work the same as you would going to a smaller supercharger pulley. Somtimes the crank pulley is easier to change than a supercharger's pulley.

-Mike
http://www.dodgetruckworld.com/xplikt/
2002 2WD RC SLT 4.7L 5spd 3.92 LSD
MBRP Single in/out, straight piped 3rd cat, turndown tip
Hotchkis swaybars and springs
Bilstein custom tuned shocks
Roadmaster Active Suspension
Shaved emblems and antennae

notchlx
Dodge Dakota
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12/18/2002
22:58:04

RE: Kenne Bell s/c on a 4.7 auto?
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Yeah, and if you have to send the charger in for any warranty work, they wont frown on you for changing the blower pulley.



j
GenIII
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12/18/2002
23:50:10

RE: Kenne Bell s/c on a 4.7 auto?
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I would definitely not try to put an intercooler on the KB. In the first place I don't see how it could be done with the KB's design. One thing to consider with an intercooler is the loss of flow due to friction within the intercooler itself. There's going to be a pressure drop. It's possible what you gain in cooling, you lose right back thru pressure loss. KB is coming out with an intercooled s/c for the Hemi. That should be interesting to see how that design works. I'll let you know how my water injection works out. Remember that most people do not have the problem
I am having anyway.

2000 4.7 CC auto, clear corners, Magnaflow catback, Kenne Bell s/c.

Justin
Dodge Dakota
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12/19/2002
08:28:33

RE: Kenne Bell s/c on a 4.7 auto?
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Sounds good, thanx for the input. I'll try the KB w/o the inercooler, and see what I think after driving it for awhile. I'll post it when I get it on thanx again guys. I know that I'll have a traction problem so I plan on installing a pos. trac, along with my Kumho tires.



Justin
01;QC;4.7;auto
4:56;HO cams;70mm TB
4"intake;IAT;TPS.95
3rd cat removed;flowmaster
coming soon KenneBell S/C

watch out SS's



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