The guys over on the Bronco board sent me this way with my question. I have a 1996 Bronco XLT with 5.0L and lots of bolt ons, cam and heads are stock. I purchased a JET Ford Performance Module about a year ago, but I am considering pulling it and using a programmer. The reasons I am considering this are as follows:
1. I have been told that the performance improvements with the JET module are only realized at WOT. I installed the JET module at the same time I installed headers, ignition, & intake mods, so I really do not know if a performance improvement was realized as a result of installing the chip.

2. The Superchips programmer and Hypertech programmers provide a greater measure of control over the performance changes and can be changed or deleted without taking apart the interior of my truck.

3. I have a flat spot in my acceleration curve at 3000 RPM at 50-70% throttle. Acceleration curve is smooth then drops off (along with 100-200 rpm) for approximately one second. The truck then begins to accelerate smoothly again and pulls through 3000RPM.

The Bronco is a daily driver with occasional use as a tow vehicle. I take it off road infrequentlty, and then nothing very extreme. I enjoy maximizing the performance of my vehicles, and strive to get the most out of it that I can.

I would appreciate your input in choosing the best programmer for my Bronco. The Superchips is particularly attractive with the choices of program in their unit, but I am not committed to this. I am looking for maximizing performance throughout the power band, not just at WOT. Always looking to squeeze every drop of performance I can get.

Thanks for your help.

Tom H.

http://www.clubfte.com/users/bigredb...BigBronco.html

 

The Hypertech tunes at WOT only. Neither gives a great deal of performance control: you can set the octane (both) and whether you tow (Superchips only). You cannot adjust the timing and fuel yourself, but you can adjust shift firmness. If the headers are long tube you should go with a custom programmed chip.

I can't tell you why you have the flat spot, could be a number of things. The programmer is not going to tune around a problem in the system.

 

OK, here are some of specific questions (yes, I searched first). I will give you my exact stats first:

-1996 Ford Bronco 5.0L (302)
-JBA Short Tube Headers (p/n 1667) w/ Custom exhaust (cats & sensors intact)
-MSD 6A Ignition w/Taylor Wires
-MSD Cap and Rotor
-Crane Fireball PS-91 Coil
-BBK Twin 56MM Throttle Body
-PRO-M 70MM Mass Air Meter (Factory, modified bridge, tuned for stock injectors)
-K&N Aircharger (p/n 63-1066)
-JET Ford Performance Module (p/n 89605)
-JET Low Temp Thermostat (p/n 10170)
-B&M Shift Improver
-All factory emission equipment (functional)
-EGR, PCV, TPS, Fuel Filter all brand new
-No computer codes set
-Fuel pressure at rail dead on with factory specifications
-New TPS checked through range from throttle shut to WOT with voltmeter. Smooth transitions with no problems indicated.
-No vacuum leaks or exhaust leaks
-Ignition system is tight. No signs of arcing or sparking, no carbon tracks inside the cap. No sparks visible underhood in the dark.

1. I have been told that the JET module I currently have installed only affects performance at WOT. My e-mails to JET have gone unanswered. Is this information correct?

2. One of the posts I read concerned aftermarket MAF requiring custom chip. My PRO-M MAF is 70MM (Ford factory MAF) that has been modified by machining out the bridge post, and is tuned for factory injectors and cold air induction. Will the Superchips tuner work for me or is a custom chip required?

3. If a custom chip is required, recommendations?

4. As for the flat spot in my acceleration curve, this occurs at 50-70% throttle vs WOT. If the JET only functions at WOT, my thoughts were that the problem revolves around insufficient timing advance. With the exception of that momentary glitch, the truck runs like a bat out of hell with no other driveability concerns. Your opinion?

5. As the Superchips tuner and the Diablo chips improve shift firmness and modify transmission control, I am assuming they would be incompatible with my B&M Shift Improver and that it would have to be removed. Is this correct?

I thank you for taking the time to read all this stuff. Please understand that I just want to ensure I am headed down the right path before I kick in another $300 or so. If I am going to eat the JET module because I did insufficient research, just want to make sure I get it right this time.

Thanks

Tom H.
http://www.clubfte.com/users/bigredb...BigBronco.html