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-   -   NOS ZL1 Cam (https://www.yenko.net/forum/showthread.php?t=174235)

NVcollector 01-06-2023 08:09 PM
NOS ZL1 Cam
 
2 Attachment(s)
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 01-06-2023 10:30 PM
My 3959180 cam has 9181 on the end.

luzl78 01-07-2023 12:28 AM
2nd design l88 and zl1 used the same cam. Can am motor had a more aggressive cam.

NVcollector 01-07-2023 04:26 AM
Quote:
Originally Posted by luzl78 (Post 1610530)
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 01-07-2023 05:05 AM
1 Attachment(s)
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napa68 01-07-2023 11:26 AM
Quote:
Originally Posted by L_e_e (Post 1610524)
My 3959180 cam has 9181 on the end.
That is what was stamped on the end of my ZL1 cam as well

luzl78 01-07-2023 03:31 PM
Quote:
Originally Posted by NVcollector (Post 1610543)
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 01-08-2023 02:34 AM
Quote:
Originally Posted by L_e_e (Post 1610524)
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 01-08-2023 05:46 AM
Quote:
Originally Posted by Big Block Bill (Post 1610604)
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 01-10-2023 04:26 PM
Gm put the 180 into the l88 and zl1.


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