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Jet Preformance Chip: Test results

 
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Old 07 Jul 2002, 12:46 am
Young Cruiser
 
Join Date: Jan 2002
Location: Clearwater, FL, USA.
Posts: 93
Default Jet Preformance Chip: Test results

My experience: <img src=icon_smile_sad.gif border=0 align=middle> I picked up a Jet Performance Module from Jet Performance Products (www.jetchip.com) at Automotive Engineering in Clearwater Florida, a reputable local speed shop. Unlike the ASE performance chip which requires sending in your e-prom assembly for reprogramming, the Jet Chip is an external module that runs in series to your factory chip. What attracted me to this unit was that you could turn it “on and off”, when the engine is not running of course; Otherwise you will blow an error code and unless you know how to clear it, you will have to take it to your dealer to clear it. (You won’t want to do this). While mentioning taking your PT into the dealer, I should mention that on the last page of the installation manul it states “If a problem occurs that may require you to take your vehicle to a dealership for service, first remove the Jet Performance Chip and reinstall vehicle back to stock.. This is not as easy is it may sound. I had installed quick disconnects and it was obvious that I had “messed with the system” which of course leaves you suspect as causing whatever problem you took it in for service for. Anyways, I had it installed and wanted to know for sure what the increase would be. Prior to installing it I was told that I could not expect more than a 12 -15 HP increase. I figured 150 HP stock plus 15 HP for 165 HP was worth pursuing. To check it out I contacted Tune Tech of Tarpon Spring, Florida. (727-939-8467) which has an “in ground” NHRA calibrated dynometer, The owner, Steve, tells me that he has de-bunked many a false performance enhancing claim for several local car clubs. Not that all are fake and worthless, just that some exaggerate the results you can expect. Some of the claims have been outrageous. We made seven runs total. First to establish a baseline without the Jet Chip, and then with it. The experience was disappointing from start to finish. After establishing the base run, and then installing the Jet Chip and turning it “on” it took four more runs to get a consistent reading. Erratic shifts to extreme lean fuel to extreme rich occurred three times. Finally back to back “successful (?) Runs. Steve runs a cautious operation and I had agreed that we would red line at 6,000 RPM. Optimum HP tops out at 5,000 RPM in whatever gear you are in. Anything over that and you are wasting gas and adding useless stress to your engine. Bottom line: I gained a whopping 1.4 documented HP !! My advice is buyer beware! According to Steve, Jet does make some good chips, but the external module for the PT is probably not one of them. The pictures below: are as follows:


Setup at Tune Tech

2coolpt on the dyno

Revving it up

Readout

Results


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Old 07 Jul 2002, 06:03 am
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2coolPT,
Thanks for the test info. I have been trying to find a source for the PT version of the Jet, but it hasn't been easy. This may explain why it has not been so popular.

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Old 07 Jul 2002, 09:47 am
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2coolPT,
Thanks for the great write-up on the chip. Had you done any other mods to your cruiser like air-induction or exhaust. The test results you posted sure look a lot different than what CD is claiming for the PT...or am I reading the charts wrong. A wopping 122.3 power output against a claimed 150 from Chrysler? If you don't mind me asking, what a run on the dyno cost? I'm just about an hour north of you and would like to know (or maybe I don't want to know} what the mods I've done have added/subtracted to the output of my PT.

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Old 07 Jul 2002, 10:22 am
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Join Date: Oct 2001
Location: Richmond, Va., USA.
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Hey 2coolPT , great post with lots of good easy to understand info. Just one question . I have heard when changes are made that would effect the air/fuel mix , it takes time for the computer to adapt to the new modifications . Did you take this into account ? Also read a thread awhile back where someone was having problems with the chip and they had to disconnect-reconnect the battery several times to correct it , which seems to show that the computer does need to "adapt" to any changes .

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Old 07 Jul 2002, 10:08 pm
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Location: Clearwater, FL, USA.
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Good questions. The only other mod I have done that could have an impact on more HP was the Air intake and exhaust. I run a K&N "flat" filter in the stock cold air box. I like the looks of some cool looking replacements but the physics are wrong. You have to have cold dense air for a HP gain. Hot humid air subtracts HP. (The 2003 PT Turbo has an intercooler for cold air intake). I am still looking to install a ram air feed from behind the grill or below. Havn't figured it out yet, but I want to do it right. The other mod I made that I thought might make a difference was my duel exhaust. I have a Borla "cat back" (duel split is in back of the catalytic converter). Basically an engine is like an air pump. The bigger the intake the more exhaust volume needed. A cat back really dosn't help much as it is still restricted by the single stock header and pipe in front of the converter. But sound soooo good. Thats what I really wanted was the look & sound.

I regards to the 122.3 HP vs 150 HP, well I don't know what they are measuring, load vs no load. The 122.3 was what was the actual HP transfered to the front wheels. I took my PT in for service and had the dealership check for any irregularities and everything checked out within specs. I had the advantage of being able to compare two PTs. In addition to our silver "2coolpt" we have an identical inferno red PT (except for the mods). Both are 2002 Limited 5 speeds.

Yes the on board computer must "learn" all over again. This is based mostly on your driving habits. For the dyno tests, (we ran seven), we took that into consideration. First the Jet baseline should have been higher that stock baseline which had been reset. But it showed only a minor increase. In the process of "learning" we ran into the problems of the erratic mood swings of the Jet chip. The radical shift to ultra lean at high RPM (5,000+) is dangerouse to your engine. It was this unpredictable aspect that convinced us to pull the Jet chip after it dit it twice.

Tune Tech of Tarpon Spring, Florida. (727-939-8467 worked out a "deal" for me. A standard dyno test runs $75, but Steve was so intrested in this test I got them for $35 (each). Expensive yes, but I got the information that I needed since I was probably fooling myself on paper as to what I really had (HP) We tried several "tunning tricks" to see if there was any change but they came up negtive. Steve (Tune Tech) has a lot of performance chip experience and is working with one that he is "beta testing" that you can adjust with your laptop PC. It has 27 connectors and is a nightmare to install.

My bottom line: I like the idea of more power, but I don't have the $3,500 - $4,500 for an add on turbo. I have a 7 year bumper to bumper warranty that I don't want to void. 2coolpt will become my "tow car" for a moterhome in about 1-2 years. I enjoy the "coolness" of the car for what it is. It's a great crusing machine. I don't race anymore (getting to old for that & probably would get to many tickets), but I enjoy making the car look great, but not gaudy.

Thats my story and I'm sticking to it!




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Old 08 Jul 2002, 01:33 pm
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Location: Kailua, HI, USA.
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The Horsepower you are showing on your dyno run is to the ground/at the wheel HP. Remember your drive train, basically your transmission soaks up anywhere from 15 to 22 percent of you known engine HP. The cost of dyno runs are around $70.00 to $120.00 depending on how many are around. Usually they have them setup at some of these import car showoffs and stuff.

Gman

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Old 09 Jul 2002, 01:29 am
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Location: Saskatoon,Saskatchewan Canada
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Well now to really pop your bubble 2cool.
I have a 2001 auto and put in the jet module, ram air hood & intake,custom duals,plasma booster ignition,throttle body spacer & heavy ignition wire.
When i run the jet chip the PT hits red line faster,shifts at lower rpm when you step on it and for my money is a definite power booster!

To each their own I guess..she kicks butt up against any PT in the area!!
Kojak

"BBOPNPT..Turbo'd for speed..it's what ya'llneed!"
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Old 09 Jul 2002, 10:41 am
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Join Date: Feb 2002
Location: Seattle, WA, USA.
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2Cool,

Sorry but I agree with Kojak. I've installed a Jet Performance chip, a cat back system, a Helix Power Tower, and a K&N air intake system. My PT also kicks butt and the biggest performance boost I received was from the Jet Performance chip. It not only affects horsepower and torque (to a lesser degree) but also changes the shift patteren. Next on my agenda (which I have on order) is a Hedman 4 into 2 into 1 header. This should add more low end torque which the cruiser really needs. Anywise, good luck in whatever mods you make.

Jerry

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Old 09 Jul 2002, 05:30 pm
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Join Date: Feb 2002
Location: Saskatoon,Saskatchewan Canada
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Jerry..Wow scary..we are on the same schedule. I am in the process of picking a header system as well. I was going to go with JBA..do you think there is any difference??When are you getting yours?
Dave..email me at..dave@bluecaleb.com

Thanks Kojak

"BBOPNPT..Turbo'd for speed..it's what ya'llneed!"
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Old 09 Jul 2002, 06:00 pm
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Location: Clearwater, FL, USA.
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No bubble to pop here! As I mentioned, this was my experience. From what other have told me, the Jet chips (PT version)are a bit irratic. Jet will exchange a faulty chip provided you convince their techs it that it is a faulty chip. My sales source had one customer exchange twice, the third chip was a charm!(?) I just wasn't going to go through all of that. If you (Kojak) have had success with yours, then I am glad for you. Not everone has been quite as lucky. Apparently this discussion has been going on for quite some time. I did a "search" of this site and a couple others others and found the good, bad, and ugly on this subject. I just hope you never experience an irratic ultra lean shift like mine did. I was fortunate that it happened on the dyno and it was caught. Thanks for your comments (all). Keep on Cruisin' !!

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