| The miata oil pressure is kind off all over the map if you trust the OEM gauge.
I usually see:
Cold-idle 40/cruise 60ish all the way up to 80-90 at high RPM
Hot-idle 20ish/cruise 35ish up to 60ish at high RPM.
You will notice that there is not much consistency between the OEM gauges and various people will report various readings.
--- On Mon, 7/14/08, [EMAIL PROTECTED] <[EMAIL PROTECTED]> wrote:
From: [EMAIL PROTECTED] <[EMAIL PROTECTED]>
Subject: Oil Pumps - OEM vs. aftermarket
To: [email protected]
Date: Monday, July 14, 2008, 3:24 PM
Is the current thought still pay the price for OEM now or pay the uglier price of broken parts later?? I recall seeing discussion many moons ago on this..
Also, shimming the pump.. need some guidance on that. Never done it, not seen how to do it. Found a Chris Chu post (http://forum.miata.net/vb/showpost.php?p=182281&postcount=7) that simply describes it as:
Tracing along the oil path, you'll find a hairpin locking a spring and piston in a tunnel (around 10mm in diameter). Remove hairpin, add washers to the top of the stack (closer to the hairpin) and put back hairpin. I shimmed around 1.5-2mm total (can't remember) and without cooler reaches close to 6 (90psi) which is higher than enough. With cooler, pressure never
reaches 4 (60psi) but close to it most of the time and should be high enough.
Remember that shimming oil pressure relief valve increases load on the oil pump and may introduce potential side-effects. So don't overdo it.
Any clarification/caveats/etc? What is my target oil pressure cold idle/hot idle/cold cruise/hot cruise?
Wallyman
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