Apex MPI stage 1 boost

[crmac33]

What is the max boost a stage 1 mpi supercharger can put out? What pulley combo would achieve this?

 

[helmic]

boost

12 psi is the max but I don't remember the pulley size.

 

[A.Granath]

If you are using a rotrex c15-60 (same as in nytro stage1) the max input shaft speed to the compressor is 11.840rpm

Example:

Engine revs 8900 (nytro)

34 bottom pulley
26 top pulley

34/26=1,3 (gear ratio)
1,3x8900=11638rpm (input shaft speed)

 

[matt@mpi]

The standard pulleys are 27/24 on the stage 1 Apex kit. That should be around 12 psi and sea level.

 

[crmac33]

Thank you.....Matt, thanks for the info on the phone regarding this!