how much does a procharger cost?

[DCx]

I just swaped my car from an auto to a 4 speed. I build an auto gear spec M22 using a super case, iron mid plate, and italian gears. Im not really looking to grenade any of this stuff. Just looking for around 500 rwhp. Jody what type of carb did you use? demon or holley? i was reading on the chevelle site that the holley is the way to go. Without spending too much on a fancy carb will a regular double pumper work if converted? or do i need to strat with a more expensive model like one of there HP 4150s. I think I am in the 10.5:1 compression area so a piston change is needed. Other then that did you use a MSD boost master? or is one needed for low boost aps?

[camcojb]

A standard double pumper is fine once it's modded. Probably in the 650-700 cfm range for your HP goal but a 750 would work also. I've always used Holleys but have a friend who did a Demon which worked just as well.

Depending on the amount of boost you may not need a boost retard. I like to build them to be able to run as much advance as is practical and tailor the boost accordingly. In other words if you can run 32 degrees of timing and 9-10 psi of boost the engine is very responsive and quite a street terror. But if to add a couple of pounds of boost requires a 5-7 degree timing retard you do lose a lot of the boost gain with the timing retard.

My friends 406 I built ran 14 psi of boost and 32 degrees but required mixing some race gas in. He put a boost retard on it and had to pull back to 28 degrees or so with pump gas to not detonate, but it felt like it lost 100 HP. So we put a water injection kit on it and he can now run the 14 psi with 32 degrees of timing and 91 octane. Made 691 rwhp.

Jody

[TurboLark]

Heres some good info for the blowthru carb stuff.
Build you own blowthru
and
Blowthru carb builders and parts

A 750 can get you up to at least 1200hp. So no need to go any bgger than that unless you already have a carb(like I do).
I've got my old 800 douple pump holley, but i bought a ProForm main body so i have the tunable air bleeds. Will probably get some jet blocks that have externally changable jet setup.