HPJunkie

I have a friend that runs a procharged 502mpi and weve been talking about raising the rev limiter. I am thinking 5800-6000. The thought is to rev it higher with a smaller pitch prop and reduce stress on the drive and inprove holeshot as well as acceleration.

Griff

If its a stock cam, it will rapidly start losing torque beyond about 5200rpms.

articfriends

iTrader: (1)

If your asking if the mefi3 ecu can be raised that high the answer is yes,mine is,Smitty

TylerCrockett

iTrader: (1)

I can set your Rev Limit up to 6000 Rpm on the Mefi 3. The newer Mefi 4's can go to 9000 RPM. Tyler 8103242720.

HPJunkie

Thanks Tyler,
I do have another question though. If I set the fuel pressure up to give the proper o2 reading on top end then the idle mixture will be rich? Ive heard of a resistor that "fools" the temp sensor to think the motor is warmer than say 120 degrees therefore keeps the motor out of cold start mixture. ( all of this because of the no thermostat procharger setup) can this be fixed with your programming?
Greg

HPJunkie

How can I tell if I have a mefi 3 or 4?

Noise Pollution

There's two MEFI 3 ECU"S. Ser. no end with 099 or 999.
Not too many 999's. Either will work. Just different programing.

TylerCrockett

iTrader: (1)

I can program the ecu so you will not need the box. I will never be right adding all the extra boxes.

articfriends

iTrader: (1)

Tyler,I wanted to raise my rev limiter when I dyno my motor with you again in a few months,you already have it set to 6000,can we eliminate it completely and just use my msd pills or will I need to convert to a mefi-4 to go to 6400? Smitty

articfriends

iTrader: (1)

Ol Tyler hard at work!!