anyone know the specs for the ZZZ cam??
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Joined: Oct 1999
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From: Ft. Worth, TX
anyone know the specs for the ZZZ cam??
Yup, you read right...ZZZ, not ZZ3 or ZZ4 
I used to have this cam in my old 86 IROC. That car is long gone now, but I still have the cam with low miles on it, and want to use it in my 97 TA. IIRC, it had 235/235 duration @ 0.050, and I don't remember the lift, adv. duration, or LSA. Any help is appreciated.
Thanx in advance!
I used to have this cam in my old 86 IROC. That car is long gone now, but I still have the cam with low miles on it, and want to use it in my 97 TA. IIRC, it had 235/235 duration @ 0.050, and I don't remember the lift, adv. duration, or LSA. Any help is appreciated.
Thanx in advance!
Supreme Member
Joined: Sep 2001
Posts: 6,111
Likes: 53
From: Ontario, Canada
Car: 1988 Firebird S/E
Engine: 406Ci Vortec SBC
Transmission: TH-350/3500stall
Axle/Gears: 7.5" Auburn 4.10 Posi-Traction
If your refering to GM's first design "ZZ*" cam. the lift is .480"
the lobe separation is 114 and Advertized duration is 336 deg. There advertized durations don't compare to popular aftermarket specs.
Generally "duration @ .004" (Crane) , ".006" (Comp) . As you can
see, even Crane and CompCams, numbers are not comparable.
( measured at different lift points).
You can find out all the specs for a camshaft using a "CamDoctor". Many good speedshops and performance engine builders have one. Basicly you spin ther cam in a fixture, with a measuring probe on a lobe, and the computer prints out the specs
for you. (Cam Card).
the lobe separation is 114 and Advertized duration is 336 deg. There advertized durations don't compare to popular aftermarket specs.
Generally "duration @ .004" (Crane) , ".006" (Comp) . As you can
see, even Crane and CompCams, numbers are not comparable.
( measured at different lift points).
You can find out all the specs for a camshaft using a "CamDoctor". Many good speedshops and performance engine builders have one. Basicly you spin ther cam in a fixture, with a measuring probe on a lobe, and the computer prints out the specs
for you. (Cam Card).
Last edited by F-BIRD'88; Dec 27, 2001 at 07:01 PM.
Thread Starter
TGO Supporter
Joined: Oct 1999
Posts: 533
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From: Ft. Worth, TX
Ok, was I right by saying the duration @ 0.050 is 235/235?
I now know the lsa is 114*.
Does anyone know the lift of the cam, net or gross?
thanx again.
by the way - the cam is up at my Grandpa's house in Illinois, so it's not feasible to bring it to a machine shop to get the specs read.
I now know the lsa is 114*.
Does anyone know the lift of the cam, net or gross?
thanx again.
by the way - the cam is up at my Grandpa's house in Illinois, so it's not feasible to bring it to a machine shop to get the specs read.
Supreme Member
Joined: Sep 2001
Posts: 6,111
Likes: 53
From: Ontario, Canada
Car: 1988 Firebird S/E
Engine: 406Ci Vortec SBC
Transmission: TH-350/3500stall
Axle/Gears: 7.5" Auburn 4.10 Posi-Traction
All hydraulic cams run with 0 lash, so the net lift is the same as gross lift and that is .480" with 1.5 rockers. The duration @.050"
is 235.
is 235.
Last edited by F-BIRD'88; Dec 29, 2001 at 01:49 PM.
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