Today's Message Index:
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1. 11:44 AM - Re: Roller cam for Lycomings (FLYaDIVE@AOL.COM)
2. 10:13 PM - Preferred Filler? (Steven Jackson)
Message 1
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| Subject: | Re: Roller cam for Lycomings |
--> TeamGrumman-List message posted by: FLYaDIVE@aol.com
In a message dated 9/22/04 12:55:11 AM Eastern Daylight Time,
TeamGrumman@AOL.COM writes:
> I went to the Reno Air Races this last weekend. At the Lycoming tent,
they
> had a mock-up of a roller cam for the O360. The really sweet thing about
> Lycoming making it avialable (they can machine your engine case to fit the
> new
> lifters) is that a roller cam can be made to put out all sorts of
horsepower
> or
> torque at any rpm or for any range you want.
===============================
Team:
A couple of questions:
1 - Our original Cam and Crank use split babits instead of roller bearings.
If we were to go to roller bearings how are they assembled into the Split Case
and Over the lobed of the Cam?
2 - Roller bearings are nice but they are not the entire story. What about
Cam Followers and Roller Rockers?
From reading this thread there is much more to Roller Cams that what is being
mentioned. Well, it is being mentioned but it is being glassed over. The
use of roller Cams, Cam Followers (which have not be mentioned) and Roller
Rockers (also have not been mentioned) all go to reducing running friction. A
reduction in this friction will offer up some more HP and longer life. BUT! The
large increases in HP as mentioned are from changes in Cam Timing. As mentioned
you can request improved performance at different ranges: Low End, Mid Range
and High End. This usual increase is usually followed by an increase in Gas
Usage and in Heat. Looking from the other side of the equation changes in cam
timing can also be done for fuel economy. I would love to see a reduction in
friction and a reduction in gas usage. Say a cruse at 8000' and burning only
5.5 GPH. I just did a flight from Atlantic City, NJ to Charlotte, NC and
burned 7.6 GPH in a O-360. Just imagine what that could have been with lower
friction and a better cam.
Barry
"Chop'd Liver"
Message 2
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| Subject: | Preferred Filler? |
--> TeamGrumman-List message posted by: "Steven Jackson" <steven.jackson14@adelphia.net>
TG,
What's the preferred filler for small dents and dings?
Steven Jackson
N1434R
L22
Yucca Valley, CA
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