[rebel-builders] Elite Hi oil temp
Posted: Sun Feb 19, 2012 4:51 pm
The 1977 172N with the "H" series 160 HP came with a 4" duct from the
vertical baffle on the right side behind the cyls, down to the cooler
which was mounted to the firewall. It ran hot!
A factory mod was to move the cooler up and mount it to the vertical
baffle and eliminate the 4" duct. This reduced the oil temp by 20*F.
How hot is the Cylinder head temp? Having tight baffling is a must!
That is to say no place for air to by-pass the cylinder cooling fins.
Any air that by-passes cause a two fold effect on cooling. First that
air is not doing any cooling. Second it creates a reduced pressure
differential between the ram air in the intake plenum verses the low
pressure near the cowling exit. It only takes a combined few square
inches of area to have a big affect.
Air ducted on to the oil filter probably is not doing much good, if the
filter had cooling fins it might help a little.
Dick Wampach SR-108
-----Original Message-----
From: mike.davis@dcsol.com [mailto:mike.davis@dcsol.com] On Behalf Of
John W
Sent: Wednesday, August 20, 2008 10:05 AM
To: bobp@prosumers.ca
Cc: rebel-builders@dcsol.com
Subject: [rebel-builders] Elite Heat
Hi Bob,
Any suggestions on how to get the oil temp down on my Elite ?
Running at 22o on an 85 degree day.
I have enlarged the lower cowl bottom cutout to 1.25 the inlet in sq
inches- increased the scat hose cooling hose from the baffle from 1 inch
to 3 inches and redirecting it onto the oil filter ,swapped out the
Positec 7 row for as Niagra 8 row and have as of yet not achieved much
reduction (5-7 degrees)in oil temp.
Have a Stuart Warner filter but am resisting the firewall retrofit
until I am out of options?
Tks
John W
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vertical baffle on the right side behind the cyls, down to the cooler
which was mounted to the firewall. It ran hot!
A factory mod was to move the cooler up and mount it to the vertical
baffle and eliminate the 4" duct. This reduced the oil temp by 20*F.
How hot is the Cylinder head temp? Having tight baffling is a must!
That is to say no place for air to by-pass the cylinder cooling fins.
Any air that by-passes cause a two fold effect on cooling. First that
air is not doing any cooling. Second it creates a reduced pressure
differential between the ram air in the intake plenum verses the low
pressure near the cowling exit. It only takes a combined few square
inches of area to have a big affect.
Air ducted on to the oil filter probably is not doing much good, if the
filter had cooling fins it might help a little.
Dick Wampach SR-108
-----Original Message-----
From: mike.davis@dcsol.com [mailto:mike.davis@dcsol.com] On Behalf Of
John W
Sent: Wednesday, August 20, 2008 10:05 AM
To: bobp@prosumers.ca
Cc: rebel-builders@dcsol.com
Subject: [rebel-builders] Elite Heat
Hi Bob,
Any suggestions on how to get the oil temp down on my Elite ?
Running at 22o on an 85 degree day.
I have enlarged the lower cowl bottom cutout to 1.25 the inlet in sq
inches- increased the scat hose cooling hose from the baffle from 1 inch
to 3 inches and redirecting it onto the oil filter ,swapped out the
Positec 7 row for as Niagra 8 row and have as of yet not achieved much
reduction (5-7 degrees)in oil temp.
Have a Stuart Warner filter but am resisting the firewall retrofit
until I am out of options?
Tks
John W
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