bits of supercharger theory worth reading thru

[grumpyvette]

http://www.fefcholden.org.au/techinfo/s ... index.html

http://shop.brutespeed.com/85-91-Corvet ... 98_c20.htm

http://performancetrends.com/Calculator ... ulator.php

https://www.procharger.com/catalogs/ProCharger_Corvette_catalog.pdf

much better match to a 496 BBC
https://www.carid.com/weiand/8-71-s...MIhuaYkZ2m3AIVC7XACh0IKA_UEAQYBSABEgK_kPD_BwE

https://www.procharger.com/automoti...eted/gm-carbureted-aftermarket-efi/sbbb-chevy

https://www.procharger.com/automoti...t-efi/sbbb-chevy#/p-1x-and-d-1x-superchargers

The numbers related to these blower sizes, such as 142, 177, and 256, relate to the amount of air in cubic inches that is pumped by the blower in one blower revolution. The 6-71 and 8-71 designations refer to the original GMC diesel engines. Table 2 shows the amount of air per blower revolution the Weiand blowers pump.

TABLE 2: Supercharger Volumes
Supercharger Type Approximate CID or
Air Per Revolution
Pro-Street 142 142
Pro-Street 177 177
Pro-Street 256 256
Weiand 6-71 411
Weiand 8-71 436
Weiand 10-71 469
Weiand 12-71 497
Weiand 14-71 522
In selecting the proper supercharger for your application, you also need to take into consideration how you plan to drive your vehicle and the approximate boost level desired. How you plan to drive your vehicle is important because you can set up your blower to be more efficient at high engine speeds or more efficient at low engine speeds, or you can arrange for the best compromise for the full engine rpm range.
To run boost levels from 6 to 10 pounds we recommend the following:
Forged blower pistons with a static compression ratio of 7.5:1

• Steel crankshaft
• Four bolt main caps
• Steel harmonic dampener
• Stainless steel valves
• Three angle valve job
• More aggressive camshaft
• Roller rockers
• Ported and polished heads
• Steel rods with good rod bolts
• Chromoly push rods
• High output ignition
• Weiand high flow water pump (cast iron or aluminum available - see our complete water pump section for applications)
• Minimum of a 2-1/2" diameter dual exhaust with headers. Recommended primary tube diameters and collector sizes are:
• Small Blocks: 1-5/8" to 1-3/4" with 3" collectors
• Big Blocks: 1-7/8" to 2' with 3-1/2" collectors

For maximum boost and horsepower applications (12 pounds or more), we recommend the following engine specifications:

• High quality forged or billet crankshaft
• Four bolt main caps with quality bolts or studs
• Steel harmonic balancer or crank hub
• High quality steel rods (H or I beam)
• Forged blower pistons
• O-ringing the block (mandatory)
• Severe duty stainless steel valves or iconel
• Fully ported and polished heads
• Solid or roller cam designed for high boost
• Roller rockers
• Chromoly push rods
• High output ignition management system or magneto
• Blueprinted carburetors or fuel injection
• High octane race fuel (112+ rating)
• Minimum of a 3" diameter dual exhaust with free flowing street/race mufflers and large tube headers.
• Recommended primary tube diameters and collector sizes are:
• Small Blocks: 1-7/8" to 2" with 3-1/2" collectors Big Blocks: 2-1/8" to 2-1/4", with 4" collectors
• Maximum effective compression ratio on gas not to exceed 24:1
• It's important to realize that there are no hard and fast rules and the suggestions made here are general in nature.

an even better option in my opinion , requiring less hood clearance, would be a centrifugal supercharger with inter-cooler ( inter-cooler not shown in this picture) and a throttle body and direct port injection is also an option.

https://www.holley.com/products/int...MIgbncx6Cm3AIVFrbACh13kQbIEAQYBCABEgJwy_D_BwE

https://www.powerperformancenews.com/tech/grade-on-a-curve-choosing-the-right-supercharger/

http://www.superchargersonline.com/index.php?main_page=page&id=53

https://www.jegs.com/s/tech-article...chargers+-+Blowers+-+Roots+Type+-+Centrifugal

http://www.superchevy.com/how-to/engines-drivetrain/0610ch-superchargers/

https://www.carthrottle.com/post/what-do-supercharger-capacity-ratings-actually-mean/