I am thinking about buying a used zz-3 with about 5,ooo miles on it for my 91 Z28 with a 350Tpi and automatic tranny. All i have for mods is pulleys, afpr, jet stage 2 chip, airfoil, k&n's, tb coolant bypass, homemade ram air and ported plenum and lower intake. Wondering what your'e ideas are on buying it used and what kind of hp gains can I expect, or any experiences you have had with this cam. Thanks.

 

I have that cam in my car. However you will need to change the springs on your heads, as they wont handle the high lift of that cam. I used Manley springs.

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1991 Camaro Z28
5.7L 5-Speed
13.25 @ 107.18 MPH
Southern California
Member: SoCal 3rd Gen F-Bodies
Webmaster: SoCal F-Bodies
Webmaster: ICON Motorsports

 

Anybody know how much hp this cam is worth? I will be installing 1.6 Harland Sharps roller tip rockers also.

 

ttt

 

You might want to go with 1.5 ratios on the exhaust side. I have a zz9 cam and it ideled
like sh** with 1.6 on intake and exhaust. It is still real lopey I may put 1.5 rollers on both. zz9 is simular to zz3 pulls hard to 5000.

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87IROC Z28
355 5-SPEED,HEADERS,ZZ9 CAM, RAM-AIR, K+N FILT, PORTED PLEN, MOD MAF, T/B BYPASS, 1.6 ROLL ROCK, TRUE DOUBLE ROLLER TIMING CHN, JET CHIP, AIRTUBES-CAT-SMOGPUMP-GONE, 95 10-BOLT/3.23, ALUM DRIVESHAFT, ACCEL 300 IGN, RELOCATED MAT.

 

According to Desktop Dyno 2000 its worth 25 HP over stock. Your mileage will vary.

I have 1.6 rollers on the intake and 1.5 rollers on the exhaust, too.

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1991 Camaro Z28
5.7L 5-Speed
13.25 @ 107.18 MPH
Southern California
Member: SoCal 3rd Gen F-Bodies
Webmaster: SoCal F-Bodies
Webmaster: ICON Motorsports