map clamp

[Petemac]

what is a map clamp exactaly..??? I have an 05 with a bov intake and stage 1 is a map clamp needed?

[Petemac]

anyone?????

[sarty4]

no a map clamp is not needed, at all.

[sarty4]

What is a map clamp?


very simple. The clamp hides boost from the PCM, which in turn keeps timing high. It also leans the fuel curve out.

Why do you ask? Real simple. Every turbo car from the Factory is programed to give more fuel and less timing when the ecu reads higher boost. Now this is dependent to the map sensor. Via 2 bar or 3 bar..or whatever. The map sensor reads the boost and sends a signal via 5 volt , voltage to the pcm. The higher the volts, the more fuel and less timing the motor will see. THis is done to keep yahoos from blowing their motors. The thing is, Mopar went over board with it. They claim that the EGTs[ exhaust temps] get to high with increased boost. That basically means that turning up the boost, even with a healthy A/F ratio can melt your motor. Thats not a good thing. Now we solve that problem via the map clamp. The map clamp will keep the timing high, in turn bleeds some of the EGTs off. I have proven this a million times. Im not going to get into anymore of that crap.


The map clamp will only allow a certain voltage pass through to the pcm. As i stated before the higher the voltage seen by the pcm, the lower the timing and more fuel you get. We all know the srt runs very rich from the factory. So just leaning it out some will make power, let alone raising timing. The map clamp is adjustable so it can act like a fuel mod also. Its basically a crude SAFC, which is a map clamp per rpm instead of per boost.