Calculating boost pressures.

[CamaroAJ]

Originally Posted by Tinker

Probably look at similar builds for ballpark. Your camshaft will play a huge role in boost also. The 114 degree split will help your boost. If there is too much overlap, which increases with duration and closer lobe separation, the supercharger will just be blowing out the exhaust. The more your heads flow, the more your exhaust flows and basically anything that increases volumetric efficiency will yield lower boost pressures.

Thats part of my issue, Nobody has swapped a LSA blower with a LS9 accessory drive. The blower pulley is separate on the LSA and they can change that, the top, or both pulleys. The LS9 has a 14% overdrive available, but it runs more than just the supercharger so I can't swap it.

Originally Posted by nicks67ca

Belt slip is a real concern for that small of a pulley. For road race applications most stick to 20-23% overdrive. There are a few 28% overdrive LSA surviving out there.

Who is going to tune it? They may offer a cam package and pulley ratio that they could recommend. That is the route I went with.

I thought about that too, weapon x has larger idler pulleys to help wrap the belt around the pulley more.

If I still live in Texas by the time its ready to tune I'll have PatG tune it. I've sent him 3 friends cars now that others have tuned and hes made more power and had better drivability. Otherwise I don't know.