Re: [Amc-list] new lifters old cam

[Matt Haas <mhaas@xxxxxxx>]

Tom Jennings wrote:
> On Thu, 1 Mar 2007, Larry R. Daum wrote:
> 
>> add a $6 bottle of moly oil additive or look for a $600 AMC street
>> roller cam setup.  (Not to Nick Alfano , looks like some needs to
>> step up and start providing the option of an AMC Roller lifter street
>> cam setup.) thanks LRDaum
> 
> The valve train has got to eat a lot of power just in friction
> and spring-pushing; how much of that is due to the cam/flat
> tappet?
> 
> Except for the obvious cost issue, roller tappets (sic, should be
> "cam followers" I suppose) just seem like a good idea, even at
> non-racin engine speeds.
> 
> How are they for longevity at street speeds compared to flat
> ones?

The ones in my 96 Ram are still going strong at over 133,000 miles. 
Roller lifters have been used by the OEM's for over 20 years now. As 
long as you're not buying cheap parts, I doubt durability is a problem. 
I would think that comparing otherwise identical cams, the roller lifter 
is going to last longer due to less friction.

Matt
-- 
mhaas@xxxxxxx
Cincinnati, OH
http://www.mattsoldcars.com
1967 Rambler American wagon
1968 Rambler American sedan
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