I'm thinking on getting a Supercharger in the fall when i get my new engine......I'm wondering what kinda of supercharger to buy for a 305 TPI and how much gain will i see in horsepower and torque.....do i have to reprogram my computer???

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1987 IROC-Z
G92, LB9 305 TPI, 3.23, Bright Red with Carmine Interior, Pioneer DEHP47DH CD deck.2 JBL DS645 4*6 (F).. 2 JBL DS965 6*9 (S).. Soon to get new 305 TPI

 

go ahead and search the archives. you'll find more than you want there.

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• 83 Z28-- not a pretty site to look at, 200k miles and im sure it was treated like a rental car every day of its sad life(before i got it).. sold, thank the lord
• 74 Z28-- 383/400, green on black. pretty clean. FOR SALE!!!

 

With a Procharger from ATI you can get anywhere from 60-90% power gains With the engine's factory 9.3:1 compression and the D-1SCwith anintercooler you can run 15lbs. of boost which will make a factory TPI 305 have 380hp and pprox.500 lbs of torque, but you will need bigger injectors and you might need a stronger tranny .any thing less like 9 and 12 pounds of boost should be okay with factory parts if it is intercooled.

 

My 305 was rebuilt to be supercharged. My best normally aspirated time is a 14.07. This isn't too impressive, but keep in mind that it was built with a blower in mind, i.e. 1-3/4" headers, all the larger intake pieces, a cam designed for a 350, and an EPROM designed for a blower. My best time to date with the D1SC at ~8 psig boost is a 12.06 @ 116 mph. That's a two second improvement, which is approximate to 200 hp.

With my old setup which included a Paxton (6-psig), I dynoed at 421 rwhp. My best time is a 12.57.

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Willie

Supercharged 1987 305 IROC-Z, Daily-Driver, Emissions-Legal.
Former Paxton (6-psig): 12.57 @ 111 mph.
Former Paxton (6-psig) & former 50-hp nitrous: 12.04 @ 114 mph.
ATI D1SC (8-psig): 12.06 @ 115.94 mph.
Future ATI D1SC (?-psig): Gotta catch them pesky 26-psig boosted TTA's!!

http://willie.camaro-firebird.org/

1987 "20th Anniversary Commemorative Edition" Z28 Convertible -- Super Chevy Show Class Winner, 1998.