dirtyTurbo

Mine does. Not sure if this is normal or not but it just seemed strange to me. It drops just the slightest amount noticeable whenever I step on the gas regardless of gear/rpm/amount of load.

Just one of the many things I found to stare at other than 3mph traffic today

running_cold924

mine does just the opposite....try cleaning the little "footballs" on the back of the cluster?

dirtyTurbo

Thats strange. It didnt seem like an electrical issue but I wouldnt put it past these cars

running_cold924

see if it changes when voltage is being used, like turn on lights, blower, defroster, a/c....

944Ross

If I understand your question and description, it sounds like you may have excessive endplay on the crank. If you hold a steady speed on flat ground (only throttle to maintain) and add throttle, and the pressure drops noticeably, it could indicate excessive clearance at the thrust bearing. I had a truck that got to where it would drop 20 psi under these conditions, threw a rod about 500 miles later from the lack of pressure.

pnbell

Mine does the same thing.. Like on the Highway if I accelerate the oil pressure will 'very slightly' go down, and when I let off it will 'very slightly' go up...

Honestly if it is barely noticeable (like mine), I wouldn't worry about it...

dirtyTurbo

944Ros- You scared the bejesus out of me. Untill I read that it changed 20 psi?? thats crazy. I'm talking barely noticable.

pbbell- Thats exactly my situation thanks for putting it in better words for me. I was hoping somebody else was driving around like this

Obviously I'll keep an eye on it

pnbell

I replaced my Rod Bearing this summer... Didn't make a difference, and actually my old bearing looked fine, no noticable wear.

Your Welcome.

Techno Duck

I have noticed my 951 does the same. It was only noticeable once i installed an aftermarket oil pressure gauge. If i cruise in 5th and get on it slightly oil pressure drops by maybe 5psi before coming right back up.

dirtyTurbo

Interesting. I'm glad its not yet another serious issue but does anyone have any idea why this happens?

roman944

mine goes straight to 5

I don't think I've ever seen it "low"

dirtyTurbo

Yea I've never been below 2 bar with this motor. Probably not a bad thing

m73m95

Mine does the same....

Cruising off throttle to low throttle, I am at 5 bars. When floored, it goes down to about 4.5 bar.... I've always wondered the cause of it.

I'm not really leaning toward engine mechanical problems (though i know it is possible). I have my oil analyzed by blackstone, and they always say and show my engine to be in pristine condition (their words).....

Arominus

Is there a pressure bypass in play at higher loads? maybe the ORpV moves to a different position?

Porsche16V944

idling mines drop way down to about 1... as soon as i start driving its back up between 4-5 all the time....usually pinned on 5 once its hot