I spun a bearing in my ZZ3 motor and am now left with my ported and polished ZZ3 heads,ZZ3 cam and 1.6rr. The original 305 is back in the car. How do you guys think the heads and cam would work in a 305? I already have a ported intake, 52mm TB and a 3" exhaust and the custom chip from the ZZ3 motor. I'd really any input you guys have.

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Jason D.
92 Z28

 

The heads would work pretty well, I believe. The problem, I think, lies in the lift of the ZZ3 cam. I tried getting info on a ZZ3 cam in a 305, and I seem to remember someone saying that, for some strange reason, the 305 could not handle the high lift of that particular cam. I am not sure if it was piston to valve clearaance or what. Someone fill both of us in

 

Anyone, I'm sure someone can help us both out.

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Jason D.
92 Z28

 

I believe the combo you are describing will work on a 305 with no problems, but to be on the safe side you should check you piston to valve clearance. You should have .100 min clearance on the exhaust and .080 min clearance on the intake.

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1988 Formula 5L/5sp 3.45 gears, SLP cold air kit, MAS gutted, TPIS air foil, TPIS AFPR, MAC headers, Mac under drive pulleys, MAC cat back, Relocated MAT.
Best ET street tires 13.85
Best 60 FT street tires 1.930
Best MPH street tires 99.29

 

I'm not sure of the specs of the ZZ3 cam, but the cam I have in my 305 is from SLP and the #'s read as follows: 218I 224E @114degree lobe seperation. Every other company in the U.S. said it couldn't be done, but as you can see SLP prevails again. I pull 12lbs of vaccum with a nice idle.

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88'TA 305TPI 330HP, NATURALLY ASPIRATED, PASSES N.J. EMMISIONS. "I AM JUST THAT GOOD"

 

ZZ3/ZZ4 cam is 208/221 .474/.510 and 112 LSA I dont see why that couldnt work great in a 305, and I know people who have used L98/ZZ3/ZZ4 heads on 305's.

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1991 Camaro Z28
5.7L 5-Speed (originally 305)
13.25 @ 107.18 MPH
Southern California
Member: SoCal 3rd Gen F-Bodies
Webmaster: SoCal F-Bodies
-=ICON Motorsports=-

 

I think the ZZ3 cam should work great in the 305, I also have a friend running the smaller SLP one, and it works great, so I say go for it.

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1987 Chevy Camaro IROC-Z
L98 TPI 350 (5.7L)
TH 700R-4 Transmission with 2.77:1 Rear End

Current Mods: Edelbrock TES 1 5/8" Headers, Hooker Aerochamber Cat-Back System, Performance Resource Chip with 160* Thermostat, Accel Ignition Components, K&N Filters, All Free Mods, Falken ZIEX Z-Rated Tires.

Best ET : 14.32 @ 97.7mph
(corrected for elevation)