Mike,
Hmmmm I was afraid of that. The driveability of the JET II IMHO is
better than the stock computer, but Im not sure about the total gains.
Again, IMHO Im happy with the JET since I do most of my driving on the
road (not at the track) and I think the driveability is definitly
better. Hopefully the headers will also improve the power, but its
dissapointing to see your lousy before and after dyno results. I
think JET should get a call!
Bruce K Bridges
(the butt can be deceiving)
-----Original Message-----
From: Mike Catlin [mailto:Catlin@erols.com]
Sent: Saturday, August 08, 1998 1:59 PM
To: dakota-truck@buffnet.net
Subject: DML: Re: Dyno Results on the R/T with Jet Chip
Well I received my Jet chip #99823-S last night for my R/T. I
thought it felt different but just wasn't sure. Anyway I took
the R/T to EPI Tuning in Maryland. They have a "Dynojet" chassis
Dyno and they only charge $50 for 2 pulls. They ended up doing
several more pulls just checking things out. This is the exact
same dyno used in the "Hot Rod" magazine article that dynode a
stock R/T in there May 1998 issue. To be fair to Jet chip I
installed as per their instructions last night and drove around
last night and to the dyno. They let the R/T cool down and did
the first pull with the Jet chip still installed. This was giving
Jet a slight advantage since the following pulls with the Jet chip
removed would be done on a hotter engine. They hooked up the truck
with the front facing out of the building with a large fan blowing
air at the front of the truck. the temperature was 86 degrees outside
and kinda humid. Well hears the rear wheel dyno results:
PEAK HORSE POWER PEAK TORQUE
Jet chip 217.2 300.3
Stock Computer 220.3 303.5
Hot Rod Mag 191.7 252.2
As you can see I LOST power with the chip. The only good news is
my basically stock (Throttle body mods & MP air cleaner) R/T is making
220 rear wheel HP & 303 rear wheel lb-ft of torque. That's pretty
good considering Hot rod used the same dyno on a new R/T and got
about 30 less HP and 40 less lb-ft of torque. Once my headers get
here it's back to the dyno. I do want to thank Jack for all the effort
he put into the group purchases. One last note I'd say the G-tec is
pretty accurate since the readings I got from it also said in the 220s
for HP although I did get a 233 HP reading on a cool night on the G-tec.
If anyone wants to see my dyno print out this should get you there:
http://www.geocities.com/MotorCity/Garage/2566/
Toasted Again
Mike Catlin
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