ZZ4 Camshaft
Race Director
Joined: Sep 2003
Posts: 16,835
Likes: 337
From: Database Error Indiana
I have been using a ZZ4 for about 40k miles. Pretty tame. Not real racey sounding. Youn do need a chip tune to take advantage of it. They say you can get by with the stock chip, but I thought mine ran pretty crappy with it. 
Melting Slicks
Joined: May 2007
Posts: 2,382
Likes: 2
From: Kathleen FL
My Lunatic cam has very similar specs to the ZZ4 cam. Dart iron heads, Miniram, 323 rwhp, 300ish ft-lbs of torque. It has a stockish idle to it, but you will hear it lope slightly if the idle gets below 800 rpms and/or if I change my timing so I can run cheap gas. Kinda cool sounding. You should be able to run a stock tune without any problems.
Le Mans Master
Joined: Jun 2006
Posts: 5,642
Likes: 5
From: One day you're a Comet...the next day you're dust... Arkansas
Burning Brakes
Joined: Dec 2006
Posts: 936
Likes: 2
From: Tyrone PA
Drifting
Joined: Feb 2003
Posts: 1,974
Likes: 2
From: San Antonio Texas
That cam IMHO, has too much ex duration, unless maybe you're running a completely stock exhaust system. Most all the GM factory cams are pretty "slow acting" cams too; more overall duration for the amount at .050". An after market cam like Comp Cams will have more bottom-mid range power, and idle better. They will have smaller overall duration numbers for the same .050" numbers. Keep the LSA at 112* or higher, to be more computor friendly.
Melting Slicks
Joined: Mar 2004
Posts: 2,141
Likes: 2
From: Pittsburgh Pa
i put a near stock sized ligenfelter cam in my vette when i blew the motor but i kicked myself in the but because now that i have gone through it all over again because the first time didn't hardly show a gain at all and the big cam leaves a much bigger smile on my face..
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Le Mans Master
Joined: May 2007
Posts: 8,448
Likes: 27
From: Valparaiso
My ZZ4 Cam is in ! can't wait to test it ...i dont know which would be the real difference with the stock one because my old L98 was really tired when i rebuild it PLUS i added hypereutectic flat tops and ZZ4 Springs ....so im pretty sure i will notice a difference with the old setup of my L98...
Any comments from who currently have the ZZ4 cam on their setups ?
i would love to hear more while im finishing the rebuild ...
What's the main difference in behaivor compared to the stock one ?
Any comments from who currently have the ZZ4 cam on their setups ?
i would love to hear more while im finishing the rebuild ...
What's the main difference in behaivor compared to the stock one ?
Le Mans Master
Joined: Aug 2000
Posts: 8,838
Likes: 31
From: Australia
With the GM ZZ4 springs say $130 tops for a cam factory matched to the L98 alum heads.
Ran one for 3 years in my 100K 350.Nice lope , excellent drivibility with stock chip and great performance.
12.9 with modded TPI and headers,no cat ,A4 , 3.07 rear.
1.7X 60ft times on DR's.
After finally getting around to dataloging just prior to replacing with 383 found stock chip has too much advance for cam;WOT.
Slight knock counts under heavy load, WOT which was pulling timing out.Also the idle speed needs lifting from the stock 550 rpm.The cam won't idle down that low so with stock programming it tends to hunt up and down .
Nothing you cant live with but easily programmed out.
If you have no $$$ and need to replace a stock cam , highly recommend.
Race Director
Joined: Sep 2003
Posts: 16,835
Likes: 337
From: Database Error Indiana
At first I wished I had gone with a bigger cam, but now I feel the ZZ4 is exactly what I wanted. The cam seems to go well with the intake and heads I used. Datalog numbers tell me I am getting the most out of it. The et numbers back that up. With the price of ga$, a bigger cam would just have me buying more and more gas and I have other things to spend my $$$ on.
Drifting
Joined: Feb 2003
Posts: 1,974
Likes: 2
From: San Antonio Texas
Le Mans Master
Joined: May 2007
Posts: 8,448
Likes: 27
From: Valparaiso
I thought about RR's but i discarded the idea ...because of my zz4 springs ...i bought stock zz4 1.5 new rocker arms .-
i haven't done any porting to anything.-
maybe i'll add 1.6 rockers in the future! but i was really close to put 1.6's on it !
i haven't done any porting to anything.-
maybe i'll add 1.6 rockers in the future! but i was really close to put 1.6's on it !
Le Mans Master
Joined: Aug 2000
Posts: 8,838
Likes: 31
From: Australia
Mine ran so well I gave up thinking about it
To all the naysayers;
the GM Fastburn 385 is a 350 ZZ4 short block ( with same ZZ4 cam )
and the fastburn heads making 385 Hp so the cam is not that BAD
Last edited by rodj; Mar 18, 2008 at 04:16 AM.
Drifting
Joined: Feb 2003
Posts: 1,974
Likes: 2
From: San Antonio Texas
I was always interested in the wide int /exh differences but figured the factory must have known what they were doing as the ZZ4 heads are the 113 Vette heads.
Mine ran so well I gave up thinking about it
To all the naysayers;
the GM Fastburn 385 is a 350 ZZ4 short block ( with same ZZ4 cam )
and the fastburn heads making 385 Hp so the cam is not that BAD
Mine ran so well I gave up thinking about it
To all the naysayers;
the GM Fastburn 385 is a 350 ZZ4 short block ( with same ZZ4 cam )
and the fastburn heads making 385 Hp so the cam is not that BAD
Calderone... Sorry about the porting thing. Cusinartvette is working with Vortecs also, and I got the two mixed together.