 Stock oil switch pressure? |
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| VaccaRabite |
 Oct 24 2012, 09:07 AM
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#1
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En Garde!  Group: Admin Posts: 13,754 Joined: 15-December 03 From: Dallastown, PA Member No.: 1,435 Region Association: MidAtlantic Region 
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At what pressure does the stock type 4 oil switch light the idiot light?
2psi-ish? Zach |
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Replies(1 - 9)
| Cupomeat |
Oct 24 2012, 09:12 AM
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#2
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missing my NY 914 in VA Group: Members Posts: 1,338 Joined: 26-November 07 From: Oakton VA Member No.: 8,376 Region Association: MidAtlantic Region |
If I remember it was listed at 2.5psi, but I've heard it wasn't reliably calibrated.
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| JStroud |
Oct 24 2012, 09:13 AM
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#3
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Senior Member Group: Members Posts: 1,463 Joined: 15-January 11 From: Galt, California Member No.: 12,594 Region Association: Northern California |
IIRC it's 7psi, but I could be wrong
Jeff |
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| VaccaRabite |
Oct 24 2012, 09:21 AM
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#4
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En Garde! Group: Admin Posts: 13,754 Joined: 15-December 03 From: Dallastown, PA Member No.: 1,435 Region Association: MidAtlantic Region
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Hense the question.
I have heard everything from 2 psi to 8 psi. I'd like to nail it down, and don't have my shop manual in front of me. |
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| Mike Bellis |
Oct 24 2012, 10:02 AM
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#5
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Resident Electrician Group: Members Posts: 8,347 Joined: 22-June 09 From: Midlothian TX Member No.: 10,496 Region Association: None 
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Build a rig with a gauge and bicycle pump and test it.
What was it was originally and what it is now are 2 different things. If it is an original German part ~vs~ a Chinese copy... If they are not calibrated, then they will have an effective range of slop... What's the underlying question? (IMG:style_emoticons/default/poke.gif) |
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| VaccaRabite |
Oct 24 2012, 12:08 PM
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#6
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En Garde! Group: Admin Posts: 13,754 Joined: 15-December 03 From: Dallastown, PA Member No.: 1,435 Region Association: MidAtlantic Region
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I need to replace my dual poll switch as it failed. I am considering just going back to an idiot light and using the spot my oil pressure gauge is in for an A/F meter.
At Aircooled.net there is a blurb that the dual poll switches turn on the idiot light at 8 psi, while stock switch operates at closer to 2 psi. I wanted to confirm that was for T4 as well as T1 engines. |
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| McMark |
Oct 24 2012, 01:46 PM
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#7
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914 Freak! Group: Retired Admin Posts: 20,180 Joined: 13-March 03 From: Grand Rapids, MI Member No.: 419 Region Association: None |
The factory didn't even know. 2-6.4psi
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| VaccaRabite |
Oct 24 2012, 05:24 PM
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#8
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En Garde! Group: Admin Posts: 13,754 Joined: 15-December 03 From: Dallastown, PA Member No.: 1,435 Region Association: MidAtlantic Region
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Okay. That being the case I think it will ditch the pressure gauge and go back to the simple idiot light sender. Put an air/fuel gauge there.
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| Black22 |
Oct 24 2012, 06:05 PM
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#9
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Senior Member Group: Members Posts: 886 Joined: 1-November 07 From: Creswell, OR Member No.: 8,290 Region Association: Pacific Northwest |
Why would you only want find out you've lost oil pressure at 2psi ? Your engine is shot at that level. At least 8 psi gives you a split second longer to shut it down.
I guess I don't understand your logic. A/F gauges are good for tuning, but don't NEED to be permanently installed on a DD. I'd take oil pressure any day over A/F mixture. It's kind of like monitoring your personal caloric intake (energy taken in and burned) but not monitoring your heart and blood pressure. Both are important, but your not going to need to eat if your heart stops! IMO, have both if possible or oil pressure if you can only have one. |
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| cary |
Oct 24 2012, 09:43 PM
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#10
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Advanced Member Group: Members Posts: 3,900 Joined: 26-January 04 From: Sherwood Oregon Member No.: 1,608 Region Association: Pacific Northwest
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I've always heard 7.5 lbs .....................
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