GM ZZ4 Camshaft

[ldr]

Hi all, I have 1988 tuned port 350 that's all stock. I want some idle in it for cruise nights. Im considering the GM ZZ4 cam. Has anyone used one? Curious about the sound and idle characteristics of it.

 

[ZZ4CutlaSS]

Hi all, I have 1988 tuned port 350 that all stock. I want some idle in it for cruise nights. Im considering the GM ZZ4 cam. Has anyone used one? Curious about the sound and idle cariciterists of it.

I had a ZZ4 engine once in my 84 Cutlass....I didn't notice much of a Idle difference. You may want the Hot Cam if you want a noticeable difference. That would also involve differnt springs. If you don't have screw in valve studs I wouldn't do it. Just my 2 cents.

 

[ldr]

I know I'm going to have to change the springs and rocker studs. Does the ZZ4 have any idle at all? How much idle does the hot cam have. Don't want it to sound like a race car, just a cam note in the exhaust. Would like to keep stock converter also, was told if I stay under 230* @ .050 should be ok with that.

 

[Texas82GP]

The ZZ4 cam is 208/221 .474/.510 on a 112 LSA.

The LT4 Hotcam is 218/228 .492/.492 on a 112 LSA.

LT4 Hotcam idle clip....
http://www.google.com/url?sa=t&sour...DsfKps&usg=AFQjCNEYd9DhDp1Oli0OhsIxg8OV0nUNwg

ZZ4 cam idle clip....

http://www.google.com/url?sa=t&sour...G6BdYk&usg=AFQjCNGCLg3_Ir5yhRJ-o5YjYeUunlD6kQ

 

[axisg]

you just want idle ? Then just about anything from the thumper line from Comp should fit the bill. If you want idle and more power then the hotcam is the ticket for your stock setup

 

[ldr]

Thanks guys. If I have any sense I will leave it alone at 22 mpg with air on and be happy. Why do we always want to ruin a good thing.

 

[ZZ4CutlaSS]

I have a 490hp 383 in my Cutlass....I have this cam it's not radical and has a 110 LSA so it still makes good vacume. http://www.compcams.com/Company/CC/cam-specs/Details.aspx?csid=190&sb=2. Here is a video of it at Idle I made.

 

[pontiacgp]

Hi all, I have 1988 tuned port 350 that's all stock. I want some idle in it for cruise nights. Im considering the GM ZZ4 cam. Has anyone used one? Curious about the sound and idle characteristics of it.

I have one in my 355 SBC with vortec heads. It's the same roller cam GM uses in their crate 604 performance engines. It works great with vortec heads since they don't like alot of lift and the idles sounds very close to ZZ4cutlaSS's video. With a roller cam you need to adjust the valve lash differently than a flat tappet cam

 

[ldr]

UOTE="ZZ4CutlaSS, post: 526408, member: 9810"]I have a 490hp 383 in my Cutlass....I have this cam it's not radical and has a 110 LSA so it still makes good vacume. http://www.compcams.com/Company/CC/cam-specs/Details.aspx?csid=190&sb=2. Here is a video of it at Idle I made.

[/QUOTE]

Sounds good, more cam than I need.

I have one in my 355 SBC with vortec heads. It's the same roller cam GM uses in their crate 604 performance engines. It works great with vortec heads since they don't like alot of lift and the idles sounds very close to ZZ4cutlaSS's video. With a roller cam you need to adjust the valve lash differently than a flat tappet cam

What is the part number on the cam you have?

 

[Texas82GP]

Here's the ZZ4 cam part number......
https://m.summitracing.com/parts/nal-10185071