Comment

Comment by Dan Dempsey on January 29, 2012 at 6:38pm

Bob,

Thanks for the response.  I did have some concern about the oil temp sensor placement when I chose to put it there.  My thinking was this: It's only 1 inche from where the oil is flowing.  Oil would have to be a poor conductor of heat to get a bad reading.  I'll check it when I run the engine the way I checked oil temperatures when I ran the engine on the test stand.  I used one of those infrared thermometers.  Great tool!  I pointed it at the oil pan to get oil temp readings.  I pointed at the heads in various place to get head temps. 

There already is a brace, hard to see in this picture but there's an aluminum bracket right before the oil presssure sensor.  You can see it more clearly on the next picture.

Thanks again for the response.

Comment by Bob Pustell on January 27, 2012 at 7:29pm

I notice another possible concern, Dan. It looks to me like your oil temp sender is not in the flow of oil. Rather, it is on a dead end of plumbing, no heated oil (in any significant amount) will ever get to the sensor. You can do this for pressure, but temp needs to have the oil flowing past the sensor to be accurately "feeling" the temp of the oil in the system. One option would be to put the oil temp sensor into the oil pan. It would not be a totally accurate indication of oil temp, but it would be a lot closer than your sensor in a non-flow dead end, I would think. Another possible location would be in the oil line going to the fifth bearing - at least that oil is flowing. You would need to create a "plenum" large enough to let the probe be in the oil flow, but that could most likely be done with a large diameter fitting in the line to the fifth bearing. Finally, it looks to me like that assortment of plumbing is just standing on the nipple coming up from the stock oil pressure switch hole. I presume you will be adding some braceing so that all that metal will not be vibrating madly on that nipple?

Comment by Dan Dempsey on January 26, 2012 at 7:58pm

Ken,

Short answer, yes.  The engine will come out once the wiring is done.  It has to in order to get the plane out of the house.  When it goes back in many of the fasteners will be replaced with types that won't slip, especially where there's fuel and or single points of failure potential.

Comment by Ken Pavlou on January 26, 2012 at 4:25am

Hi Dan,
It looks like your installation is moving right along. Are you planning on safety wiring the screws on the stock mechanical fuel pump? If they loosen up you'd have fuel leaking in the engine compartment. If I recall correctly, WW made a drip pan to go underneath the fuel pump with a hose that drained out the bottom of the cowl in case any fuel were to spill.
Regards,
Ken Pavlou