lift capabilities

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Oct 11, 2004 | 11:41 PM

92rsbowtie

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Joined: Apr 2004

Posts: 341

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From: bryan, tx

Car: 92 rs camaro

Engine: 305 lo3

Transmission: WC t-5

lift capabilities

hey, does anyone know the max lift capabilities of the stock lo3 heads?

Oct 12, 2004 | 12:01 AM

Stekman

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From: Grand Rapids, MI

Car: Z28

Engine: Sb2.2 406

Transmission: Jerico 4 speed

Axle/Gears: Ford 9" 3.60

.460-480" is the generally accepted value. I would go closer to the .460" side for clearance and castings sake.

Oct 12, 2004 | 08:00 AM

ShiftyCapone

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From: Cincinnati, OH

Car: '90 RS

Engine: 377 LSX

Transmission: Magnum T56

Quote:

Originally posted by Stekman
.460-480" is the generally accepted value. I would go closer to the .460" side for clearance and castings sake.

Yup. Each casting was slightly different over the years and you will basically find the same limit range on every stock GM casting. The only castings that came out of the box that could handle .500+ were on the Gen II and III motors. Staying at .460" would be playing it safe. Some vortecs are as low as .450". A little machine work can alleviate any head of this limit however.