Re: [Amc-list] new lifters old cam

["Swygert, Francis G MSgt 436 CES/CECM" <Francis.Swygert3@xxxxxxxxxxxx>]

I'm not questioning anything you've said about flat tappet push-rod
engines. I was simply pointing out that many OHC designs have similar
characteristics. I wasn't intending to belittle your statements. My
primary point was this should affect engines other than traditional flat
tappet designs. That they are no longer used in current manufacture
makes them obsolete for sure, but as you noted, only recently not used
at all. There are way more flat tappet engines on the road than roller
right now in everyday use -- especially if you include flat OHC types.
One thing I just thought of... because of the rocker arm ratio, pushrod
flat tappets may develop more pressure between the tappet and cam lobe
than an OHC follower and cam lobe. Don't forget that this board is
dedicated to "buggy whips"!! ;>

I wasn't aware of the new diesel fuel standard details. I did know that
new formulation would have less sulphur and catalytic converters would
be used on some, but not that there would be two incompatible blends.
That's interesting! Two totally different diesel fuels will complicate
the infrastructure and impact used vehicle sales. I guess fueling
stations will have to dedicate some pumps to one fuel or the other.
Doesn't sound like it wouldn't work well with dual pumps such as used
for different grades of gasoline, but mixing a small amount (what's left
in the hose) might not matter. I wonder what this will do to the
bio-diesel advocates -- limit them to older engines (pre 2008) most
likely. 

-----Original Message-----
From: Larry R. Daum [mailto:mramc@xxxxxxxxxxx] 
Sent: Saturday, March 03, 2007 1:20 AM
To: Swygert, Francis G MSgt 436 CES/CECM
Subject: Re: [Amc-list] new lifters old cam

Gee, Frank you act like I shot your dog! According to my Hot Rod 
engine article
of the 5 companies that made hydraulic flat tappets , 4 went bankrupt 
and the 5th
is General Motors. Of the 4 other companies only one got out of 
bankruptcy and reorganized.
And china rushed in with low quality crap flat tappet replacement
lifters.
<snip>
There several styles of OHC engine
setup, but you can debate wether they any thing like a traditional 
hydraulic flat tappet. My point is no more
traditional hydraulic flat tappets, BUGGY WHIPS , Frank , Buggy 
whips, obsolete, no longer used in any new car
of truck for 2007. GM still makes flat tappet REPLACEMENT engines, 
and ZZ crate motors, but no new cars or trucks with them.

The oil standard changed as of January 1st. I went to an oil seminar 
on this just before I left Illinois. The 2007 diesel
trucks have catalytic converters, limited zinc and moly because of it 
in the new oils, a new diesel fuel that hates air or water
and a new ultra high pressure common rail fuel injection system. You 
can't use the old diesel fuel in the new 2007 trucks or new fuel in 
the old diesel trucks. Yes, they were trying to sell $6 moly/zinc oil 
additives , but the diesel truck guys, your semi truck long haul guys 
are very concerned about all this, but it's a federal mandate, no 
choice. So, as Jan. 1 , they took almost all the moly and zinc out of 
even the diesel oil, gone Frank , Federal mandate, no choice . But 
they left open a small place for additives and specialty oils like 
Bull Tears. thanks , LRDaum
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