Speed Limiter

new 4/15/2004

I have heard that all cars, even SHO's have limiters placed on them at about 120mph. If this is true, is there anyone in the Detroit area that knows how to reprogram them or take them off or otherwise disable them?
Andy

____________________________________________________________________

I hate to break it to everyone, but here is a screen shot from the SCT programming for a 97 SHO. It is a table for torque retard vs. vehicle speed. At 139mph, the computer pulls all the timing out of the motor and it just won't go any more.

Doug Lewis
Ford Performance Specialists Inc.

____________________________________________________________________
Hey Doug,
Looks like the equivalent program to what the LT-1 GM cars have for OBD-1 applications. Where did you get the full program and diag plug-ins and how much were they? I've started to play around with the idea of having the IMRC open anytime at WOT. A few people have reported bottom-end gains, as the closed position actually restricts the engine quite a bit. The theory behind this is out there because of the head design. Last time I checked the two ports did NOT Siamese back together, so when closed, you actually have an engine with 1intake valve, and 2 exhaust per cylinder.

Regards,
Justin

____________________________________________________________________
Here's another interesting item in the stock programming. This is a screen shot of the stock program in our cars for IMRC opening. It says that even at WFO, the IMRC's don't open until 3350 (and then at any throttle setting). But then they close again at 6900.

With the SCT programming, I can make it so that they open at a certain throttle setting before and stay open all the way up (or until the engine starts spitting out part numbers).

Doug Lewis
Ford Performance Specialists Inc.

___________________________________________________________________

Contact Information