James Bailey

Guys what Mark has proven is that his add on oil temp gauge has a malfunction and the gauge peggs when he turns right.....this means NOTHING about what is or is not happening in his or any other oil pan.

heinrich

when he turns left Jim?

Charley B

You're not going to start with those vicious things about Santa not being real, are you?

James Bailey

Kibort..."as many know, i have a dipstick tempurature sensor, and never noticed an interesting phenominom when taking right turns ONLY. the temp would immediately go to over 350 degrees during hard left hand turns, from its stable 260F temp range during all other points on the race track.


It makes NO DIFFERENCE which way he turns and the statement above is more than a little unclear.
What matters is the information is completely FALSE ....what he has is a short of some kind in his temp sensor, wiring, or gauge. The gauge INSTANTLY jumps to maximum just as will many other gauges when you short the signal wire to ground.
In short (pun intended) there is no temperature spike therefore no need to theorize about how or why it happens.

mark kibort

did much more testing of this this weekend. its not the sensor, or a short . something is happening with the oil level, and the sensor is detecting a shift on left turns only. happened on the famed turn 2 at thunderhill. (75mph, 1.5g constant raduis left turn). oil pressure drops only a little , as normal, and is the only place where the oil pressure goes from 5+ bar to a little over 4 bar. and the temp sensor pegs rapidly to max over 350F. but its not a short, as the gs are relieved , the temp returns to normal. i can get the temp to do this by S turning too where it will move like a G meter depending on the force of the gs.
the bottom line, you will and can see from the videos, oil pressure is perfect, which means oil is in the pan and is not an issue. Been doing this a long time folks. 15 years of racing multiple 928s, and no engine issues.
3000lbs, 370rwhp, 315 A series Hoosiers on all 4 corners, 1:59.xx lap times at thunderhill, 1:36 at laguna, and no issues.
amsoil? proper warm up before track use? keeping the levels proper?

now, if GB is pointing to the research that at 5K constant, for over 30mins, you can have an issue with all the oil being pumped to the heads and not returning, thats something that my 30 min races cant show, but im not much under that RMP threashold, as in fact, my rpm never go below 4500rpm for 30min.

Randy V

JD is still unamused - best be careful there MK.

https://rennlist.com/forums/8744157-post121.html

heinrich

Charley B

Hoosiers is actually the brand name of his tires. Mark is not denigrating people from Indiana.

James Bailey

Mark, before you continue making assumptions about what is or is not happening is it too much to ask that you TEST how quickly your sender will move from 212 boiling water to 350 degree in hot oil . Also worth mentioning that heat transfer is much quicker in a liquid than it is in air. Which means an uncovered sender is by definition not in liquid.

Bill Ball

The INSTANT temp change to PEGGED maximum is probably a red herring. I would put an Ohm meter on the leads. If it goes infinite, you know it's false. Or do Jim's test.

James Bailey

Right just something to confirm that it is a real temperature reading that is being shown on the gauge....At this point all we KNOW is it happens all the time on left turns or was that right turns....

RKD in OKC

Just make sure it is not the wire to the sensor that the G force is effecting. Had a loose connection on my oil pressure gauge on my 944 Turbo that had similar readings. It was grounding against the power steering line.

Imo000

How about putting a new gauge and wiring in and see if the symthoms return.

mark kibort

I think that maybe that it is getting exposed ONLY on left turns. (left turns Jim, lets get it straight, ok??? )

Its not acting like a short, its acting like a true reading. like its getting exposed to very hot under crank air and reading the temp as it gets exposed.

Ill do some tests in the lab to confirm.

mark kibort

Randy, what in the heck are you talking about, and why the post?
certainly , why the attached very offensive post?