So things have been pretty dormant lately, moved a couple months ago which ate alot of the funds up. But now that I have a garage, (and the Jeep just baaarley fits into it) I've been doing little things like detailing, and cleaning up some electrical stuff that previous owners didn't care to do. And today I decided to install the Jet Performance Stage-1 Chip that I got off of a guy on Craigslist a few months ago. These go for over $250 new on Quadratec http://www.quadratec.com/products/17608_0111.htm
...but I got mine for ONLY $40.00!!!!!! (god I love craigslist)That was one of those deals you just CANT pass up. Its plug and play, so no real need for a big write up, but I did snap some pics anyways just to document the upgrade.
Here's the Jeep shoe-horned into my garage:
My dirty Engine Compartment showing the ECU location before the chip install:
And the Chip, along with some O-rings I picked up to make sure things stay sealed.
And here we are all installed:
I followed the install procedure listed in the PDF I got from Quadratec's website, it literally took like 10 minutes.
Hooked the battery back up, and drove it a few miles before getting on the freeway. I noticed right away by my super scientific "seat-of-the-pants-ometer" that there was a gain in the low end torque. This was further confirmed when pulling onto the freeway, the second gear power band had WAY more "oomph." This all coincides with the manufactures claims, and I feel that this was a good mod. Best gains are achieved when using higher octane fuel, and have a high flow intake, and cat-back exhaust installed. Both of which I have.
JET's dyno sheet backs up my super accurate scientific findings. The dyno tests show, on a 1999 TJ, with a 4.0L I6, and auto trans. (virtually the exact same drive train as my XJ) that there was a 12HP gain at 2500 RPM, and 10HP gain at 5k RPM, (max range) average gain of 11HP across the whole RPM range.
I'm not gonna complain about 10HP for only 40 bux! I call that a win! The Jeep tested out fine on the 10 miles or so I drove, no CEL, or red flags of any kind. If
you CAN get a deal, and if you have a 99 XJ with similar mods as mine, I would recommend this upgrade to anyone. I cant speak for any other year of Cherokee, or different degree of modifications.