Quote:
Originally Posted by Quadcammer
Where did you run your ground?
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I think i grounded mine under one of the bolts that was under where the front of the shifter is. I think... I may have grounded it to the ground wire of the phone plug, which is where I got my wire... I can't remember
Quote:
Originally Posted by Quadcammer
So gauges were not a distraction at all and line of sight was fine. It was cold out so oil temp only got to 235. Pressure seemed consistently low, but the gauge seems to move kinda slow so it was hard to tell. Any other vdo guys have this issue?
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My vdo gauge (I have the
VDO 350-104) with that same sender and I run 10W50 oil.
Here are the things I have observed:
- At cold - the gauge goes to around 70 (essentially pegged) regardless of RPM
- At normal highway driving, oil around 190-200F it is around 55-60 and stays up there as long as I have some revs up. At idle it drops to around 20 (ok let me find some of my videos to verify, when I was running other oils, the oil would go lower than 20 at hot track level idle)
- On track, if I got up to around 235F oil temperature, it would max out around 45'ish PSI. Note that the oil pressure read at this location is around 10 PSI lower than the oil pressure at the crank and down near the oi pump (See AZ986S video where he displays two oil pressures - the one read from this spot and the one read on his accusump). The hotter the oil, the lower max PSI readings I have observed.
- The oi pressure does respond to RPM, but it is like if the needle were in some molasses. Easiest to see whe the oil is around 190-200F (normal driving). Go to idle, the oil pressure falls down shortly after. Rev it up, the oil pressure will rev up, again slightly delaying.
Here are a few laps from Sebring about a year ago, at the beginning of the video the oil temp is 205'ish and by the end, the oil pressure is getting close to 240F
First lap in video:
End of front straight:
RPM: 6250'ish
Oil temp:205'ish
Oil pressure:50
Going down the back straight, 2:21 into video
RPM: 6250'ish
Oil temp: has now climbed to 220F
Oil pressure: 45'ish
2nd and last lap in the video
End of front straight: 2:55 in video
RPM: 6500'ish
Oil temp: 225'ish
Oil pressure: 42.5'ish (1/4 of way between 40 and 50)
Back straight 5:10 in video
RPM: 6000
Oil temp: Almost up to 240F
Oil pressure: 40
This was on 5W40 - it is better on 10W50 for me, but it is still the nature of the beast with these engines...
How does this compare to how your oil pressure gauge was reading?
https://youtu.be/0Od4GJDpvDc
Here's another Sebring, Nov 2017, with the gauges visible - you have to maximize the video in HD and squint, but it is there
This is with 10W50 and it is a "little" better... These laps around around 6-7 seconds faster than the other ones from above
https://youtu.be/4DTCPJizquo