Today's Message Index:
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1. 05:12 AM - Re: High Oil Temp Issues - RV-8A (Bubblehead)
2. 07:10 AM - Re: High Oil Temp Issues - RV-8A (Carl Froehlich)
3. 09:14 AM - Re: Re: High Oil Temp Issues - RV-8A (Robin Marks)
Message 1
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| Subject: | Re: High Oil Temp Issues - RV-8A |
With that huge cooler and big air duct you should be cooling like mad! You mention
fuel injection issues. Are you sure you are not running lean?
I have an -8 and live in TX so similar or worse OATs. Standard baffles and slightly
larger cooler on the baffle per plans. I sometimes see 210 oil and 405 CHT
on a long climb but at 23/23 once in cruise I would expect 190 and 340 for temps.
Something is not right because there are hundreds or thousands of 8As out there
with a lower capacity cooling system than yours flying in the heat without a
problem.
--------
John
Keller, TX
RV-8 N247TD
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=342033#342033
Message 2
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| Subject: | High Oil Temp Issues - RV-8A |
On the ceramic coating - I have this on my 8A as well as the 10 and
recommend it.
To solve the "not enough cabin heat" problem you have on your 10, put a
stainless steel pot scrubber in the heat muffs. The pad(s) adds a huge
amount of heat transfer area and slows down the air speed and volume. This
has two effects. You end up with cabin heat much hotter but at a lower
volume - overall more heat. The second effect is you significantly reduce
the amount of cooling air are you bleeding off the plenum and in summertime
dumping right into the lower cowl area - thus reducing pressure in the
plenum and adding pressure to the area you want at the lowest possible
pressure to get the most cooling air through the engine and oil cooler.
Don't worry, you still have plenty of air going through the cabin heat scat
hoses to not overheat anything.
You may want to look at this on the 8A as a way to reduce air bleed from the
plenum.
Carl
From: owner-rv8-list-server@matronics.com
[mailto:owner-rv8-list-server@matronics.com] On Behalf Of Robin Marks
Sent: Friday, June 03, 2011 6:58 PM
Subject: RE: RV8-List: High Oil Temp Issues - RV-8A
Thanks for all the replies so far.
To recap:
. Seams, joints, edges are sealed well.
. Vernatherm has been tested & working properly
. Double checked the oil lines for blockage etc... No issues.
. We drained the oil and filled again at oil change. Because the oil
cooler is not inverted it is easy to load up with oil. We doubt there is air
trapped in the cooler.
. No EMS issues and no grounding issues as all readings are stable
and believable.
. System is Dual Garmin G3X EFIS/EMS
. Mag timing is dead nuts on. Other side is P-Mag (that runs amazing
on P-Mag only)
. RE: the 2006 Oil Cooler I can attest to the quality of these
coolers as I have the 2008 on my -10. It's just a brute force way of solving
this problem. I really doubt I can get 25 degrees out of the 2006.
. Re: ceramic coating on the exhaust. Never again. I have the
beautiful Forsling Exhaust with ceramic coating on my -10 but the one LARGE
drawback is I can't get any Cabin Heat out of the exhaust which is amazing
if you ask most -10 owners. Half heat can cook a small turkey.
Dave/Mike's suggestion of increasing the outlet area and/or louvers may be a
good way to go. That provided the most profound decrease in oil temps for
our -10.
Thanks,
Robin
-----Original Message-----
From: owner-rv8-list-server@matronics.com
[mailto:owner-rv8-list-server@matronics.com] On Behalf Of George, Neal Capt
505 TRS/DOJ
Sent: Friday, June 03, 2011 12:22 PM
Subject: RE: RV8-List: High Oil Temp Issues - RV-8A
<Neal.George@hurlburt.af.mil>
Robin -
I hate to point to the obvious, but:
All baffle joints, seams, edges, holes, penetrations sealed?
Vernatherm working properly?
No blockage in oil cooler or lines?
No air trapped in the oil cooler high corners?
neal
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Message 3
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| Subject: | Re: High Oil Temp Issues - RV-8A |
Update
We removed some cylinder dams we had placed in & around some of the
cylinders and cleaned up a few things. High CHT's are no longer the issue
other than preferring a little better temp balance between the cylinders.
Oil Temps are our problem. I expect a significant portion of this will be
resolved once we open up the underside of the cowl. Just not enough outlet
area from what we can tell.
Thanks everyone!
Robin
-----Original Message-----
From: owner-rv8-list-server@matronics.com
[mailto:owner-rv8-list-server@matronics.com] On Behalf Of Bubblehead
Sent: Saturday, June 04, 2011 5:09 AM
Subject: RV8-List: Re: High Oil Temp Issues - RV-8A
With that huge cooler and big air duct you should be cooling like mad!
You mention fuel injection issues. Are you sure you are not running lean?
I have an -8 and live in TX so similar or worse OATs. Standard baffles and
slightly larger cooler on the baffle per plans. I sometimes see 210 oil
and 405 CHT on a long climb but at 23/23 once in cruise I would expect 190
and 340 for temps.
Something is not right because there are hundreds or thousands of 8As out
there with a lower capacity cooling system than yours flying in the heat
without a problem.
--------
John
Keller, TX
RV-8 N247TD
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=342033#342033
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