idahorider
Veteran
Hey guys i am getting ready to install a used MPI stage 1 kit. It has a 27 crank pulley and 23 top pulley. Any guesses on what kind of boost it would be making? I ride at 6-10,000 ft. From looking at the pulley chart it seems that if you go bigger on top and smaller on bottom pulleys it reduces boost numbers? Correct. I think MPIs stage one Apex kit ships with 26-22. Im looking to make 10-11 lbs.
Thanks
Thanks
I'm not shure what the apex's come with but most guys on here with chargers are flat landers and the boost#'s will be diffrent compared to altitude.
I would call Mac at Mpi he will be more then willing to help.
You are correct if you put a bigger pulley on top or smaller on bottom it reduces boost levels.
I would call Mac at Mpi he will be more then willing to help.
You are correct if you put a bigger pulley on top or smaller on bottom it reduces boost levels.
