mpi pulley combo for nytro's

[sepeterson]

I am looking to run 8-9 lbs boost from my stage 1 supercharger. I have a 26 top 29 bottom. I only get 5+ lbs right now. What combo will get me there? I have talked to two shops and they both gave me totally different combos. Thanks.

 

[nytro circus]

I would just call MPI for the best setup

 

[modsledr]

also, your S/C gearing combo is only part of the equation...your boost is directly affected by your RPM's, so proper clutching is very important.

You might have the correct gearing, and if you aren't getting or maintaining RPM's, then your boost will fall off as the RPM's drop.

 

[sepeterson]

clutching has been spot on. I bought the kit from Tom Hartman. He told me to go to a 25-29. I talked to Heath at MPI and he said to go with a 25-31. I was confused with such a big difference in pulley combos to get me to 8-9 lbs. I ended up going with 25-31 and a new fuel pump to be safe. Mpi had 10 bucks off each pulley and about 75 bucks off the fuel pump. I hope this gets me close.