Re: [FWDLK] [Chrysler300] Roller tappet cams

[Owen Grigg <ram300@xxxxxxxxxx>]

As far as I am aware the first race type roller cam/tappet was designed by
Herbert Cams in 1951. As you point out some of the classic Duesenburgs may
have had them prior to this.

What's interesting about your cam is that it has a Chrysler part #, I
thought in the early days like the stick 300C's all their roller cams were
obtained from outside sources like Herbet, Isky etc etc? Or did Chrysler
just stamp their own part # on a part that was not their own?

My 2 bits worth.
Owen      

-----Original Message-----
From: Chrysler300@xxxxxxxxxxxxxxx [mailto:Chrysler300@xxxxxxxxxxxxxxx] On
Behalf Of Wayne Graefen
Sent: Sunday, 3 September 2006 10:06 a.m.
To: Undisclosed-Recipient:;
Subject: [Chrysler300] Roller tappet cams

I have a question that is outside my realm of knowledge that one of you
historians or engineers can probably comment on or answer.

When were roller tappets first employed in automobile engines as a
race-option upgrade?  I know the question is a little convoluted.  Maybe
Duesenbergs had roller tappets in limousines?  I don't know.  But what about
at Chrysler Corp?

The reason I ask is that my '53 Chrysler New Yorker Pan Am race package New
Yorker has roller tappets and camshaft # 1555153 which isn't in the parts
books.  As the 300C tech, I know that the stick 300Cs could be ordered with
any cam and some of them were "rollers".  May have been true with the stick
Bs also?  

But I'm guessing this is the earliest Chrysler put a "roller motor" into a
streetable car.  Looking for your input.  

Yes, I realize this is not a 300 or ForwardLook direct question however it
is about historical development that directly led to those cars.

Wayne Graefen

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