i used to run 17.5 lbs of boost at 3000'

and 19.5 lbs at close to sea level.

now that i have ported heads and cams, i see 15 lbs at 3000'

and 17.5 at close to sea level


i run the 2.7 upper and the 8lb lower


at what point does the magnum become ineficient, i am thinking of spining it more.

rick

 

I have taken my MP to 26 lb of boost the fuel system ran out before the MP did!

 

you remember this right? 16 lower and I used a 2.6 upper.

 

did you have ported heads and cams, long tubes?

 

damn arent u overspining the supercharger a bit? and ur boost difference is air pressure of course is greated closer u are to sea level along with the oxygen content