Skip,
What's your view of this 'problem' from TSO? The engine's
performing so beautifully that I'd hate to think of tearing it down. I
guess that, if there is a lobe lubrication problem, it would show up as
insufficient lift and performance would suffer. Solving it would
require a new camshaft and lifters. Guess I'll take the attitude, 'if
it ain't broke, don't fix it', and wait until something shows up.
Bud
Skip Kelsey wrote:
> Bud:
>
>
> I aquired some stock " cast iron"cams form England some months ago.
> Normally, stock cams are "Steel", and must use "chilled Iron " lifters.
> These have more of a stock base circle. They will work with either
> stock "chilled iron" lifters or "hardenable iron lifters. I still have
> three left. two are stock, and one was accidentally given a mild
> performance grind by "Elgin Cams" in Redwood City, Ca. I had sent it
> over to be profild and they misunderstood.
>
>
> Skip Kelsey.......................................................
>
>
>
> At 01:50 PM 1/18/2004 -0500, Bud Krueger wrote:
>
>> The extra 'quality assurance' steps are fine, but they don't relate
>> to the problem (?) pointed out in TSO. It indicates that, even with
>> perfect tappets, the design is such as to allow improper lubrication
>> for the lobes on a modern camshaft with the larger lobe base circle.
>> Nowhere in the Moss paper does it mention the 'oil hole' issue. Is
>> it really a problem?
>>
>> About a year ago I installed a new camshaft when rebuilding my
>> engine. The camshaft (Moss 451-260), purchased from JustBrits, is
>> the Crane camshaft with the larger lobe base circle. I automatically
>> installed a new set of tappets (Moss 433-308) that I bought from Skip
>> Kelsey. Knowing Skip, I doubt very seriously that I will be
>> experiencing any manufacturing issue problems with the tappets. Can
>> one buy a new camshaft for an XPAG that still uses the small cam circle?
>> Not from Crane.
>>
>> Bud Krueger
>> 52TD
>>
>>
>> Gene Gillam wrote:
>>
>>> Bob wrote:
>>>
>>>
>>>> In the December TSO, Jim Finne wrote of his observations of wear on
>>>>
>>> camshafts of larger-than-original cam circle when installed with
>>> certain
>>> lifters. Has anyone opened an engine since reading that article to see
>>> if the problem exists in other engines?<
>>>
>>> Bob,
>>>
>>> This is sorta on the subject.
>>>
>>> I'm rebuilding an XPAG and ordered a new 3/4 race cam and new lifters
>>> from Moss just before Christmas. The lifters come with a very good
>>> data
>>> sheet that explains some of what Jim Finne experienced. This data
>>> sheet
>>> has been posted at:
>>> http://www.mg-tabc.org/techn-up/tappets.htm
>>>
>>> Regards,
>>>
>>> Gene Gillam
>>> Saucier, MS
/// unsubscribe/change address requests to majordomo@autox.team.net or try
/// http://www.team.net/mailman/listinfo
/// Archives at http://www.team.net/archive/mg-t
|