LT4 Hot Cam Specs

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Dec 8, 2001 | 09:27 PM

Willie

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From: Tucson, Arizona USA

Car: 1987 Z28 Convertible

Engine: 305 TPI

Transmission: 5-speed

LT4 Hot Cam Specs

I'd like to examine valve timing events of this cam. Can I assume that you get a cam card with GM cams??? So if anyone has this cam, could you share these figures please?

IVO - Intake Valve Opening
IVC - Intake Valve Closing
EVO - Exhaust Valve Opening
EVC - Exhaust Valve Closing

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Willie

Supercharged 1987 305 IROC-Z, Daily-Driver, Emissions-Legal.
Former Paxton (6-psig) with 50-hp nitrous: 12.043 @ 112.86 mph.
ATI D1SC (10-psig): 12.056 @ 116.62 mph.
All stats are altitude corrected for 3,100 feet using NHRA's Altitude Correction Table.

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

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

Dec 9, 2001 | 01:30 AM

Kevin91Z

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Posts: 10,950

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From: Orange, SoCal

Car: 1990 Pontiac Trans Am

Engine: 355 TPI siamesed runners

Transmission: Tremec T56

Axle/Gears: 12-Bolt 3.73

I threw the specs in DeskTop Dyno 2000, and I get:

IVO: 1.0
IVC: 37.0
EVO: 50.0
EVC: -2.0

Its probably not exact, but it should be close.

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1991 Camaro Z28
5.7L 5-Speed (originally 305)
318 RWHP, 419 RWTQ
13.23 @ 107.62 MPH (2.13 60')
Southern California
Member: SoCal F-Bodies
-=ICON Motorsports=-