Superchips in a 4.7L HO -
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post #1 of 7 Old 12-21-2011, 07:14 AM Thread Starter
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2004 WJ 
Join Date: Oct 2007
Location: Knoxville
Posts: 201
Superchips in a 4.7L HO

I have been reading the threads about the superchips and the sct tuners.
I am looking for people that have the HO motor and what results they have had.
I read a post in a couple different threads on a couple different forums about how the tuners dont add any noticeable power to the 4.7 HO, that the factory already tuned the HO motor as well as its going to be.

How true is this? Will you few out there with the HO motor please chime in?

2004 4.7L HO Overland
completely stock.


2004 Overland, 75k miles, 4.7L H.O.
1997 ZJ TSi, 265k miles, 4.0 I6
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post #2 of 7 Old 12-21-2011, 08:59 AM
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1991 XJ Cherokee 
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Location: Florence
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I have one (superchips) on order, whenever it finally shows up I'd be happy to let you know the good/bad of my impressions of it. We have the same model, year, and about the same mileage so it should be a fairly even comparison.
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post #3 of 7 Old 12-21-2011, 09:04 AM
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2002 WJ 
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It is noticeable with the HO though its slight.

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post #4 of 7 Old 12-21-2011, 09:06 AM
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Hey I'd be interested in this info also...I've heard basically the same thing to, that's why I'm on the fence with purchasing one...
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post #5 of 7 Old 12-21-2011, 01:11 PM
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Location: Philadelphia
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As with any motor, the more you push it the sooner it will go BOOM! I have thought about getting a chip for my '03 overland but still a little hesitant. I have had enough issues with the car, don't want to add a blow moto to the list.

I have a DP chip in my '02 F250 7.3L diesel. I usually run it on one of the lower settings but sometimes I crank it up and get the extra 125HP+ from it. Not something I do often but on occasion I do get a kick out of seeing the look on the guy next to me wondering how my 3 1/2ton truck is keeping up with him.
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post #6 of 7 Old 12-21-2011, 02:41 PM
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I've tried all the setting on mine with the exception of the "towing" setting. I like the 87 octane tune the best because it gives a little more power and it gives some better mpgs as well. The 91 tune gets some more power but it had a tendency to want to down shift sooner on uphills and hold the higher RPM longer for the upshift. One thing that you will REALLY like if you have larger tires is the speedo correction. All around I like mine especially since I got it used for about half of new. I leave mine on the 87 tune and sometimes change to the "mileage" setting to get that extra 1-2 mpg on long trips.

04 WJ V8 HO, 545rfe w/ shift kit, NP231HD w/ SS SYE, TW drive shafts, 4" RCX, 255/75/17 moabs, 55w HID projectors, Cherry Bomb Vortex muffler, Superchips, bored TB, HD Tie rod and Drag Link, IRO Steering Equalizer, Dual steering stabalizers, Homemade Sliders, 4 Hella FF75 55w HID Light bar...

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post #7 of 7 Old 12-21-2011, 06:50 PM
leadsled jeep
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2002 WJ 
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Location: TriCities
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The speedo correction is all that has worked successfully in mine so far. Lower octane program for 87 allows pinging at light loads up hills for me. I didnt get any mpg improvements yet either. I've tuned all items and changed all fluids out as well.

I just installed new O2 sensors thinking that they may be contributing to poor SCT performance. Jury is still out on that for a few more weeks. Need more data...

Speedo calibration is nice but I am not sure i'd have paid this much for that feature alone.

If not my O2 sensors perhaps my cats are restricting improvements to be fair. She runs fine/ great on 89 octane, just wish the mpg increases or low octane options worked for me.

I will update a thread on it if I ever get to the bottom of it all.... I've had mine for about 6-8 months fwiw.

'02 Overland 190k+ miles. 2.5" lift w/springs. All Control Arms upgraded, dual Addco sways.
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