MustangWorks.com : Ford Forums - View Single Post - JMS chip owners!!! Come answer my bottom line questions.

Rebel79 · 10-18-2001, 10:14 AM

I purchased my JMS chip a while back. At the time I saw a minimal increase in power, yet I could not take the car over 5k due to the agressive timing. After working out my fuel system and ignition systems I have come to the following conclusions:

Pros

The car runs like a raped ape.
Runs the car cooler (turns fan on at 195°)

Cons

Have less throttle response
Less low end torque
Idle surges
I no longer have my idle that sounds like i have a huge cam.

I will be dumping mh JMS chip for a PMS or equivelent when I have the cash.

------------------
1994 Mustang Cobra
308ci, Vortech S-trim 11#, ported GT-40 heads, E-303 cam, FMS 1 5/8 headers, BBK Offroad H-pipe, 2-chamber flows, and several other goodies.
Rebel Racing. Home of Bay Area Mustangs

10-18-2001, 10:14 AM	#12
Rebel79 News Editor Join Date: Apr 1999 Location: Concord, CA Posts: 2,101	I purchased my JMS chip a while back. At the time I saw a minimal increase in power, yet I could not take the car over 5k due to the agressive timing. After working out my fuel system and ignition systems I have come to the following conclusions: Pros The car runs like a raped ape. Runs the car cooler (turns fan on at 195°) Cons Have less throttle response Less low end torque Idle surges I no longer have my idle that sounds like i have a huge cam. I will be dumping mh JMS chip for a PMS or equivelent when I have the cash. ------------------ 1994 Mustang Cobra 308ci, Vortech S-trim 11#, ported GT-40 heads, E-303 cam, FMS 1 5/8 headers, BBK Offroad H-pipe, 2-chamber flows, and several other goodies. Rebel Racing. Home of Bay Area Mustangs