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The Supercar Registry (https://www.yenko.net/forum/index.php)
-   Supercar/Musclecar Discussion (https://www.yenko.net/forum/forumdisplay.php?f=79)
-   -   Rare Camaro History (https://www.yenko.net/forum/showthread.php?t=169362)

William 10-19-2021 01:25 AM
Quote:
Originally Posted by 70 copo (Post 1567875)
I am not sure if you understand? I asked you If you had a copy?

The L-70 was produced at Norwood according to workers who were eyewitnesses, and this story along with images of the engine are in the book.
Nope, do not have a copy.

Not getting your point. Since the manifold has a production part number and the Engine Dress Line components are shown in the AIM, it did come close. I don't doubt L70 Pilots were built. The M08 Sport Shift option is in the '69 AIM with part numbers and that never made production either. It happens.

My position is that the L70 was intended as an option for the SS350. There is no reason to believe there was any intention to use it on the 302. For whatever reason, it never became a production engine.

70 copo 10-19-2021 12:34 PM
Quote:
Originally Posted by William (Post 1567888)
Nope, do not have a copy.

Not getting your point. Since the manifold has a production part number and the Engine Dress Line components are shown in the AIM, it did come close. I don't doubt L70 Pilots were built. The M08 Sport Shift option is in the '69 AIM with part numbers and that never made production either. It happens.

My position is that the L70 was intended as an option for the SS350. There is no reason to believe there was any intention to use it on the 302. For whatever reason, it never became a production engine.

I understand then that you have an opinion then. That's fine with me.:flag:

70 copo 10-19-2021 12:38 PM
Quote:
Originally Posted by scuncio (Post 1567876)
Are there images of the engine in the Norwood plant?

Perhaps this was a pilot build prior to cancelation.

Yes this is correct. The L-70 was produced in plant as a prototype job for GM evaluation.

Images of this engine with the air cleaner on and off are in the book that was first published back in 2013.

Lee Stewart 10-19-2021 12:49 PM
According to this article, the L70 would make 360 HP!

Quote:
But that doesn't mean none were built. Reader Lynn Dockey directed us to a question about the L-70's existence in Philip Borris's 2012 book, "Echoes of Norwood: General Motors Automobile Production During the Twentieth Century," in which Borris noted that GM initially intended the 360-hp L-70 as a sort of smaller sibling to the L68/L71 tri-power big-block 427s found in the Corvette.
https://www.hemmings.com/stories/202...ne-of-them-all

Was the L70 more than a 350 with trip deuces? Like a higher compression ratio and a solid cam? A 65 HP gain with just a 3x2 induction doesn't add up

1967Z28 10-19-2021 04:29 PM
Phil, for clarification, if the L70 was discontinued prior to the Camaro going into production then it would seem like they would have had to be evaluated on the pilot cars, however those all seem to be well documented as to how they were built. Are you possibly saying the L70 engine was evaluated after it had been discontinued and once regular Camaro production had started?

70 copo 10-19-2021 05:03 PM
1 Attachment(s)
Quote:
Originally Posted by 1967Z28 (Post 1567999)
Phil, for clarification, if the L70 was discontinued prior to the Camaro going into production then it would seem like they would have had to be evaluated on the pilot cars, however those all seem to be well documented as to how they were built. Are you possibly saying the L70 engine was evaluated after it had been discontinued and once regular Camaro production had started?

Yes, kind of. The RPO was drawn and then cancelled per the timeline. However here is where it got interesting when a retiree told me "hey I was part of the L-70 build program".

In summary These were prototypes built in the same side building where the pilots were produced. These were 3X2 small blocks and were cosmetically dressed with the stripes later used on RPO Z/28. The build happened soon after regular Camaro production started in the fall of 1966.

Here is the Air cleaner image close up that I posted in another thread on this topic here back in 2016.

1967Z28 10-19-2021 07:06 PM
Interesting. Thanks for the info.


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