Originally Posted by Rambocj7 (Post 4382726)

I have 02 sensors... Incidentally I need to retune since it looks like I'm a little lean (just did top ends and some valves were toast ).

Originally Posted by cobra marty (Post 4382535)

Here is a good site to compare different Procharger supercharger outputs and pulleys and projected boost. Fun to play with.

http://zero2sixtymotorsports.com/pro...st-calculator/

Unfortunately it doesn't have the M4 supercharger listed.
With these big blowers, output is not linear. They are relatively inefficient at lower blower rpm's in making boost. It is a logarithmic increase.
So 3/4 rpm is not 3/4 cfm and hence boost. 36,789/48,000 x 2500cfm -- Does NOT equal 1916cfm but something much less.
It will also depend on your choice of TB/carb, intake manifold, heads, cam and all their flow ratings.

I suspect your pulley combination will possibly yield lower boost numbers than you think especially if all your other components are optimized.
No big deal, So you will just need a smaller SC pulley to achieve your boost target.
Procharge is playing is safe and very conservative. "Start low, Go slow" and proceed from there.

What kind of power do you expect?
Predictions--> 555 CID x 1.15hp/cid = 640hp x 8pounds boost(8/16) = 950hp, x 10pounds boost(10/16) = 1040hp if everything is optimized.
So how much CFM is needed for 1000hp?

When will you be building your engine?

Originally Posted by cobra marty (Post 4382535)

Here is a good site to compare different Procharger supercharger outputs and pulleys and projected boost. Fun to play with.

http://zero2sixtymotorsports.com/pro...st-calculator/

Unfortunately it doesn't have the M4 supercharger listed.
With these big blowers, output is not linear. They are relatively inefficient at lower blower rpm's in making boost. It is a logarithmic increase.
So 3/4 rpm is not 3/4 cfm and hence boost. 36,789/48,000 x 2500cfm -- Does NOT equal 1916cfm but something much less.
It will also depend on your choice of TB/carb, intake manifold, heads, cam and all their flow ratings.

I suspect your pulley combination will possibly yield lower boost numbers than you think especially if all your other components are optimized.
No big deal, So you will just need a smaller SC pulley to achieve your boost target.
Procharge is playing is safe and very conservative. "Start low, Go slow" and proceed from there.

What kind of power do you expect?
Predictions--> 555 CID x 1.15hp/cid = 640hp x 8pounds boost(8/16) = 950hp, x 10pounds boost(10/16) = 1040hp if everything is optimized.
So how much CFM is needed for 1000hp?

When will you be building your engine?

Originally Posted by abones (Post 4382870)

randy your PM box is full

Originally Posted by CNC (Post 4382864)

F-1X is good to use in place of M-4 for calculating. spot on for me.