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Old 03-19-2009, 10:20 PM   #1
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Jet performance chip????

Anyone install one of these yet? I would like to extract as much power as possible without blowing up the engine! Thoughts?

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Old 03-20-2009, 10:48 PM   #2
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whats your budget thats the biggest question im guessing around what a jet chip costs

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Old 03-21-2009, 01:50 PM   #3
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they go for about $250, it's worth it if it really works. anyone use one yet?
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Old 03-21-2009, 01:55 PM   #4
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do you have an intake or exhaust yet? i would recomend a nice intake it should get you about the smae power increase plus a better sound. i have no idea about the jet chip but i have never heard good things about them just that they can interfear with the ecu and other electrical stuff.
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Old 03-21-2009, 02:16 PM   #5
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wow, theres been a lot of these chip questions as of late.

do a quick search and youll pretty much see that they are a waste of time and money
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Old 03-21-2009, 03:43 PM   #6
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Jet has a pretty bad rep, and I've never gotten a reason to say otherwise. Never tried one, but I've worked in high performance (shop owner) for 6 years. Go with another company.
On a low-revving motor like the 3.8, the biggest gains would be through boost, or reworking the bottom end and heads. Bolt-ons (headers, exhaust, intake) will do a little, but I think (I may get into this soon, depending on time vs. budget) that the heads are the bottleneck on this engine.
Also, since the compression is lowish (9.6:1), tuning won't get much power out without risk to the engine. If you're doing other work, also, the pre-programmed systems won't be able to compensate for your mods, which could cause a lean (too little fuel) condition, causing damage to the engine. It's likely the tuner can compensate for an exhaust and probably an intake, but I'd check with the manufacturer first before modding.
In general, however, I reccommend going with another brand- Jet is often the "you get what you pay for" cheap end- Mark W.
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Old 03-21-2009, 06:24 PM   #7
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Great info, thanks. Looks like I'll stay away from Jet. What about a throttle body spacer? Cheap mod, under $100. Good or bad idea?
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Old 03-21-2009, 06:37 PM   #8
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this is from another forum

"Test and configurations were made to a 2007 Jeep Wrangler 4D Rubicon..
1st. Dyno run
Bone Stock = 180.7hp / 215.8tq

First we installed a Magna Flow True Dual Exhaust system keeping the stock catalytic converts in place..
2nd. Dyno run
Dual Exhaust System = 189.6hp / 222.5tq

Then we removed the dual system and re-installed the 2 into 1 collector and just ran a single back to a Magna Flow 6” x 18” muffler and then straight back..
3rd. Dyno run
Single Exhaust System = 194.3hp / 231.3tq

Obviously the Single System yielded much better results.. That is what stayed on.. And let me tell you the Sound is awesome..

Now the easy stuff AEM Brute Force Intake System.. Very Clean install..
4th. Dyno run
Single Exhaust System with AEM intake = 202.1hp / 234.6tq

Last but not least.. We installed the Jet Performance Stage II chip.. My initial thought process on this one was I wasted my money.. But the Dyno tell the truth..

5th Dyno run
Single Exhaust with AEM intake and Jet Performance Stage II chip

Final Results = 213.9hp / 243.3tq
Overall Gains = 33.2 HP / 27.5 TQ"
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Old 03-21-2009, 06:45 PM   #9
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Pretty big gains! The Jet chip might be worth it.
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Old 03-21-2009, 08:28 PM   #10
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From what I understand, the stage I chip is mostly about a little better torque and a little better gas mileage. May or may not be worth it.. Stage II is for a vehicle with intake and exhaust and requires a 180 degree thermostat, and 91 octan fuel, plus it costs $40 more than the Stage I. Decent gains, but is it worth the combined expense of all three and gas prices.. That has to be up to the individual.

Remember that 14hp of that overall 33hp was just from the exhaust, and another 8hp from the air box. Meaning the Stage II chip with premium fuel add 11hp

I am considering the stage I,, but not sure if I will do it.
I do plan on doing the muffler relocation with a more free flowing exhaust, mostly so I can add the larger rear storage box at sometime. And I already have a K&N in the stock box..
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Old 03-21-2009, 09:11 PM   #11
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From what I understand, the stage I chip is mostly about a little better torque and a little better gas mileage. May or may not be worth it.. Stage II is for a vehicle with intake and exhaust and requires a 180 degree thermostat, and 91 octan fuel, plus it costs $40 more than the Stage I. Decent gains, but is it worth the combined expense of all three and gas prices.. That has to be up to the individual.

Remember that 14hp of that overall 33hp was just from the exhaust, and another 8hp from the air box. Meaning the Stage II chip with premium fuel add 11hp

I am considering the stage I,, but not sure if I will do it.
I do plan on doing the muffler relocation with a more free flowing exhaust, mostly so I can add the larger rear storage box at sometime. And I already have a K&N in the stock box..

I was thinking about doing that too with the muffler. Let me know what you choose and how it sounds. I am hoping for a deeper engine sound coming from the back.

Thanks,
MIller
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Old 03-21-2009, 11:44 PM   #12
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For those dyno tests, what about average power? And A/F ratio, being my major concern with a pre-set chip.
Also, on throttle body spacers- as long as it won't interfere with your intake (non-flex piping may cause an interference issue- if so, you can always cut it down ) should help power, MPG, torque a bit- some make an annoying whistling sound that some people like for some strange reason- Mark W.
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Old 03-22-2009, 02:14 PM   #13
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For those dyno tests, what about average power? And A/F ratio, being my major concern with a pre-set chip.
Also, on throttle body spacers- as long as it won't interfere with your intake (non-flex piping may cause an interference issue- if so, you can always cut it down ) should help power, MPG, torque a bit- some make an annoying whistling sound that some people like for some strange reason- Mark W.
so the tbs is a yes then?
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Old 03-22-2009, 02:33 PM   #14
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I was thinking about doing that too with the muffler. Let me know what you choose and how it sounds. I am hoping for a deeper engine sound coming from the back.

Thanks,
MIller
I will probably go with this muffler relocation kit, as you can use their muffler or supply your own.. I like quiet, so will probably go with their quieter muffler. www.jeepswag.com/jeepswagmuff/
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Old 03-23-2009, 01:03 PM   #15
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TBS is a solid idea, as I said, as long as it won't affect the intake length/routing- Mark W.
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Old 03-23-2009, 06:34 PM   #16
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TBS is a solid idea, as I said, as long as it won't affect the intake length/routing- Mark W.
for sure so if im running the stock intake box am i good?
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Old 03-23-2009, 06:54 PM   #17
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I'll tell you for sure in a couple weeks when I do it myself- going AirAid- Mark W.
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Old 03-24-2009, 02:32 PM   #18
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good deal let me know how it works and ill be next in line for one
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Old 03-24-2009, 06:41 PM   #19
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Yar. I can tell you that it won't make a HUGE difference. My main concern is the annoying whistle you sometimes get with these. If I get it, the TBS will be up for sale shortly thereafter Mark W.
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Old 03-25-2009, 01:16 PM   #20
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so if i already have an annoying whistle then i have nothing to worry about right. if you do want to post it up pm me first and ill pick it up for sure.
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Old 03-25-2009, 01:18 PM   #21
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What's your whistling coming from? You know you can remove your girlfriend if that helps And no doubt man- Mark W.
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Old 03-25-2009, 01:50 PM   #22
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no i got the girlfriend noise down but the jeep still whistles when im at about half throttle it sounds almost like a break squeal. there is a another thread up already about the noise someone else just took theres into the dealership for the same noise and the service manager said they couldnt hear it. the noise is for sure coming from the engine compartment and its not that loud but i always drive with the window down so i always hear it.
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Old 03-25-2009, 08:18 PM   #23
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no i got the girlfriend noise down but the jeep still whistles when im at about half throttle it sounds almost like a break squeal. there is a another thread up already about the noise someone else just took theres into the dealership for the same noise and the service manager said they couldnt hear it. the noise is for sure coming from the engine compartment and its not that loud but i always drive with the window down so i always hear it.
Do u have the stock intake on bc i know with my friends jeep he put an after market intake on and it is just the air being sucked through the filter....
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Old 03-26-2009, 01:30 AM   #24
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i have some whistling. never thought of it coming from the Poweraid throttle body spacer.
always thought it was from the K&N FIPK .

if i was a betting man though (which i am) its not coming from my TBS. and indeed from my k&n air intake. im not totally fond of how the separate pieces connect.

unless you did something wrong... its probably not your throttle body spacer
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Old 03-26-2009, 04:04 AM   #25
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Do u have the stock intake on bc i know with my friends jeep he put an after market intake on and it is just the air being sucked through the filter....
yea its all stock but i do have a k and n drop in filter but it did it with the stock one too
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Old 03-26-2009, 09:10 AM   #26
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Hmm. If it's like our JK, the side mirrors whistle. Try folding them in and see what happens Mark W.
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Old 02-11-2010, 01:29 AM   #27
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IT'S the tbs I have one on my 03 wrangler. If u put a cold air intake on it makes it louder
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Old 08-11-2010, 12:41 PM   #28
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Header

There have been a few mentions of headers on here, does anyone have a header they recommend?
I cracked my stock a few years back and thought I couldn't go wrong with BANKS. My first Banks header lasted for a little then I noticed a leak, sure enough it was cracked. I sent it back they shipped me a new one and I paid to have it put on. I haven't even had it a year and it's cracked again. I called Banks and they said they have been having a problem with the welds breaking. They are sending me a new one but I do not want to put a new piece of shit on just to run into the same problem.
I actually bought the JET chip II, low temp thermostat, my "original" Banks header and Magna-flow exhaust all at the same time. the Chip was a waste of money, I actually just took it off and didn't notice one bit of difference. To bad it doesn't look as good in my wallet as the $300 did.
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Old 08-11-2010, 01:04 PM   #29
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i'd want to see the dyno charts on this. while i don't dispute they picked up power, where was the power gained? 33 PEAK hp isn't terribly useful unless you're wide open all the time. cold air kits, chips, stuff like that might make power, but you have to look at where they make their power and how you drive. the torque is more useful in something like a jeep, but again, if it's higher in the rpm band, it's only useful during heavy throttle situations. in a lot of cases, you see a LOSS of low end power to gain up top. chips can legally only alter the programs at wide open throttle, so that should tell you where the power gains were. you want more proven grunt, put a set of gears in it.

keep in mind that if you use a programmer or chip on your jeep, you run the risk of voiding your powertrain warranty if you have a problem.

for those with k&n filters or intakes that have been used for at least 10,000 miles, i want you to go pop the filter out and feel the inside of the inlet tube. tell me what you find.
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Old 08-11-2010, 09:43 PM   #30
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I installed Jet Stage II on my Jeep w/ Header Back Exhaust, Intake, High Flow Water Pump & Thermostat because my buddy had one laying around his shop and I asked to try it. I have driven the same daily driving for the last 2 weeks as before and have lost 2 mpg and have noticed no gain in street performance or seat of pants like the exhaust and intake gave.

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