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Unread 10-21-2013, 07:02 PM   #1
kyminer
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Want a supercharger or some kind of mod for 4.7

I have an 04 limited with 4.7 non h.o. I want to do a performance upgrade. Need suggestions. Would really like to do a supercharger.

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Unread 10-22-2013, 03:18 AM   #2
texlurch
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Scour want adds for used S/C as no one makes anything for them
Or get creative with something like this with some DIY and JY parts
Turbos and FI are actually fairly simple, but I would probably do a single, in a rear mount.
Not much room under the hood on a WJ, not to mention they don't need anymore underhood heat.
Properly sized at 5-7 pis you'll see an extra 100 hp easy, and more torque than that.
twins04.jpg

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Unread 10-22-2013, 08:20 AM   #3
VBJeepWJ
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Quote:
Originally Posted by kyminer View Post
I have an 04 limited with 4.7 non h.o. I want to do a performance upgrade. Need suggestions. Would really like to do a supercharger.
How many miles are on it?
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Unread 10-22-2013, 08:55 AM   #4
cubalz
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Sounds like a recipe to rocket a 4.7L to an early demise.
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Unread 10-22-2013, 09:19 AM   #5
MattJeep
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I'm sure it could be done, even safely with small amount of boost. But that's a good point, the Wj is too small. Theres no under hood room and probably no room for an intercooler. Plus the extra heat? You would probably need a custom raised hood. Easiest thing to do is go grab a Overland with the H.O.
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Unread 10-22-2013, 09:36 AM   #6
texlurch
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Thats why I say rear mount

Google STS or Squires Turbo System.
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Unread 10-22-2013, 11:53 AM   #7
FailWheelDrive
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The hardest part would be tuning for the boost.

I'm not sure if any software that allows for full control of the stock ECU's fuel/timing maps is available.

Best way would probably be to swap in a stand alone fuel management system with a 2 bar MAP or MAF sensor setup.
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Unread 10-22-2013, 12:42 PM   #8
cykaaro
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There are eaton and ken belle superchargers that will work with the 4.7. Getting one might be a whole different issue, but there is information out there. Just search. Other option is turbo it.

I know someone with a gen3 camry. He's now pushing 1000WHP. But then, a lot of custom work and he knows what he's doing. Thing is, it is possible to get more out of it. Just depends on what you're willing to do and spend, and if you have someone who really knows what they're doing to do it.
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Unread 10-22-2013, 02:12 PM   #9
texlurch
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Quote:
Originally Posted by FailWheelDrive View Post
The hardest part would be tuning for the boost.

I'm not sure if any software that allows for full control of the stock ECU's fuel/timing maps is available.

Best way would probably be to swap in a stand alone fuel management system with a 2 bar MAP or MAF sensor setup.
At low boost you can usually get away with a boost referenced regulator.
No knock sensor on the 4.7 might be an issue, but a simple A/F gauge to monitor the exhaust and tune from there.
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Unread 10-22-2013, 04:21 PM   #10
alfaitalia
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Quote:
Originally Posted by MattJeep View Post
I'm sure it could be done, even safely with small amount of boost. But that's a good point, the Wj is too small. Theres no under hood room and probably no room for an intercooler. Plus the extra heat? You would probably need a custom raised hood. Easiest thing to do is go grab a Overland with the H.O.
You could make an intercooler fit (dont know about the rest) as they made an front mounted intercooled WJ model ....the CRD.... and my straight five is longer than the V8 so you should easily be able to sqeeze one in.
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Unread 10-22-2013, 06:02 PM   #11
FailWheelDrive
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Quote:
Originally Posted by texlurch View Post
At low boost you can usually get away with a boost referenced regulator.
No knock sensor on the 4.7 might be an issue, but a simple A/F gauge to monitor the exhaust and tune from there.
Yeah an adjustable rising rate fuel pressure regulator could be made to work with the use of a wideband for A/F reference.

Still wouldn't have any control over timing though which would kinda suck.

I wish something like EFIlive or HPtuners was available for our WJ's.

BTW: This thread sparked my interest because I was just talking with a buddy the other day about how a rear mounted turbo on a gutted WJ with the 4.7 & QD would make for a demon at the drag strip. Would be such a fun project.
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Unread 10-22-2013, 06:38 PM   #12
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Mega squirt, alot of wiring
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Unread 10-22-2013, 06:54 PM   #13
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Unread 10-23-2013, 04:35 AM   #14
MWF
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Another option to the AFR would be a ninth injector running off a MAP sensor, then you'd be able to create an additional fuel profile mapped against boost pressure and maybe rpm too.

I used to have a turbo converted v-formation engine with a massive intercooler, it's remarkable what you can cram into the confines of an engine bay.

The ignition side has me stumped though, you need an overboost cutoff at least really.
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Unread 10-23-2013, 04:41 AM   #15
texlurch
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You could run an MSD with boost reference and limiter chip for better spark and over rev safety.
It will retard based on boost and your settings
1 to 1 fuel regulator will raise fuel pressure in relation to boost, and "fool" the engine into thinking it has bigger injectors under boost.
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