NOS ZL1 Cam

[NVcollector]

I am looking at an NOS ZL1 cam. The GM tube is dated 1971 and the part number 3959180 along with ZL1 2nd Design is written on the tube. The cam looks original and new but the number on the end of the cam is 8911 which from what I read on the internet, it is an L88 cam, not a ZL1 cam. Any idea?

[L_e_e]

My 3959180 cam has 9181 on the end.

[luzl78]

2nd design l88 and zl1 used the same cam. Can am motor had a more aggressive cam.

[NVcollector]

2nd design l88 and zl1 used the same cam. Can am motor had a more aggressive cam.

What is a “2nd design” cam? I am building a correct ZL1 for a 69 Camaro tribute project.

[markjohnson]

.

[napa68]

My 3959180 cam has 9181 on the end.

That is what was stamped on the end of my ZL1 cam as well

[luzl78]

What is a “2nd design” cam? I am building a correct ZL1 for a 69 Camaro tribute project.

The and design cam is the 180. The 5535 was the first design used with the early heads.

[Big Block Bill]

My 3959180 cam has 9181 on the end.

The (2) NOS 2959180 ZL-1 cams I had both had 9181 on the end as well.

Bill

[NVcollector]

The (2) NOS 2959180 ZL-1 cams I had both had 9181 on the end as well.

Bill

Yea, I am guessing this is an L88 cam that was written with the wrong part number. The guy is going to measure the lobes to see what the measurements come out to.

[luzl78]

Gm put the 180 into the l88 and zl1.

[Igosplut]

What is a “2nd design” cam? I am building a correct ZL1 for a 69 Camaro tribute project.

I drove one on the street for years, they don't idle below 1500 RPM, and and nothing until 3800 or so.

[NVcollector]

I drove one on the street for years, they don't idle below 1500 RPM, and and nothing until 3800 or so.

The real purpose is to build the ZL1 for my collection and not really intending to drive it much.