Jet II n my 5.9
98 season of
racing I joined the points. Wanted to be more consistent then so I added 2x4 Belltech & Weld Draglites with
Mickey Thompson Sportmans & Street Et slicks. I also wanted Hypertech at the
time due to price over MP comp. & heard some bad things about the Jet. My
parts supplier couldnt get the Hypertech so he ordered a Jet instead thinking
there was no difference. Wasn't too
pleased about the situation but thought I'ld give it a try seeing as how the
season was starting (points) & I needed some more speed. Well I was
disappointed to say the least.97 ran 15.37. 98 15.22. ET's only dropped .15 on the 1/4. I figured the
tires & rims for .2 min due to a 125lb weight loss on rim & rubber +
greatly increased traction on the starting line & smaller dia. rubber giving
a final of around 3.88(3.55 stock).
All these things added up to a loss of hp & torque from what I could tell.
Noticed it would really bog off the line and had difficulties doing the burnout.
I ended up changing to 3.92 gears (4.18 final) later in the season cause of the
difficulty spinning the tires. Dropped .1 off(expected that) for seasons new
best of 15.13.
I dropped the Jet stage II for a MP PCM. Also changed to 8.0 wires and added a
Hi Flow cat. If the Jet worked I should have been up about 4-5hp(.05) for the
PCM and about 20hp(.3) for the cat for a .35 total.
my ets dropped by .66! Ran a new best of 14.496. I figured the cat for about .3
reduction. The MP PCM claimed 20hp. That should have given about .3 as well.
Figure the other .06 for the loss caused by the Jet Stage II. I couldn't believe
the difference. Almost pegged the rev limiter the first burnout on the
Biggest reason for pulling it was the DANGEROUS
CONDITION THE JET CHIP CAUSES.
I pulled the module after an increase in # of times that while driving the
module would cut out completely killing the engine, power steering & power
brakes. Would usually happen on the highway at 70 mph. Started doing it on the
street as well & was always on a bumpy section, pothole or expansion joint.
Scared the hell out of me a couple of times once with no where to bail on the
highway in heavy traffic in the fast lane. Not a fun situation.
The Jet modules piggy back the computer with the harness hanging off the module.
Makes for a kind of long heavy electrical connection that combined with a firmer
suspension & shitty roads caused this situation.
If you have one you may want to tie it down with multiple tie straps.
If the tabs get stretched you could have this problem.