Date: Sat, 2 Sep 2017 10:30:30 -0700
Reply-To: Stuart MacMillan <stuartmacm@GMAIL.COM>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: Stuart MacMillan <stuartmacm@GMAIL.COM>
Subject: Re: Oil pressure light and buzzer
In-Reply-To: <CY4PR20MB1303B3B9199429CB3BF90BB0A0930@CY4PR20MB1303.namprd20.prod.outlook.com>
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Right, thanks for that calculation! My tach isn't calibrated to a new 7000 rpm face, and this info will allow me to do that.
My owner's manual says the green zone is "where engine makes the most favorable torque," which is what you basically said, and pretty much the same as best mileage.
Stuart
-----Original Message-----
From: Dennis Haynes [mailto:d23haynes57@hotmail.com]
Sent: Saturday, September 02, 2017 7:32 AM
To: Stuart MacMillan; vanagon@GERRY.VANAGON.COM
Subject: RE: Oil pressure light and buzzer
I think the green area on the tachometer represents the ideal operating range for the engine. Below the green it does not make any real power and attempts to accelerate just make noise. With oil temperature monitoring over many years and a number of different Vanagons going over 4,200 rpm for extended periods is not good for oil temperature control. Yes the engine can tolerate excursions to the rev limiter but 5,000 rpm operation for a long duration without some additional oil cooling.
Your Engine RPM to speed does not seem right. That is not much different then stock. Doing some math stock tires run about 830 revolutions per mile so 830 X 3.27 should be around 2,714 rpm at 60 mph. Torque converter slip should be no more than 3% so add 80 RPM for that.
So with the above assumptions you should be seeing ~3,260 rpms at 70 mph. My guess is you do not really have the gear set you think or your torque converter is shot. Yes they do fail.
Dennis
-----Original Message-----
From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf Of Stuart MacMillan
Sent: Friday, September 1, 2017 3:22 PM
To: vanagon@GERRY.VANAGON.COM
Subject: Re: Oil pressure light and buzzer
The green area is simply the best mileage zone, nothing more. Remember, these were built in the '80s when the EPA mileage numbers were first on the sticker, and they were a selling feature.
FWIW, with my Subaru 2.2 and the 3.27 Freeway Flyer R&P 70 is about 4000 rpm, and very comfortable. The engine breathes so much better that it never feels stressed at high rpms, and is quieter at speed. It has a red line of 6000 rpm, which I don't plan on hitting.
Also, oil pressure is 15 psi at idle, and 50+ at 70 mph at temp with the dino 10w40 oil I'm using for break in.
It's so much more fun to drive!
(Sorry, Friday bragging!)
Stuart
-----Original Message-----
From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf Of Jeff Palmer
Sent: Thursday, August 31, 2017 9:57 PM
To: vanagon@GERRY.VANAGON.COM
Subject: Re: Oil pressure light and buzzer
Goodness. That’s out of the green, and into the ‘no colour zone’ if not into the red! Never understood why there was an uncoloured area in between the two.
Jeff
> On Aug 31, 2017, at 11:55 PM, David Beierl <dbeierl@attglobal.net> wrote:
>
> Around 4650 at 85 mph. The occasional accidental wander up to 90 would be 4900 and change. I never tried for the official 96 mph top speed.
>
> Yrs,
> d
>
> On Fri, Sep 1, 2017 at 12:52 AM, Jeff Palmer <w.jeff.palmer@icloud.com <mailto:w.jeff.palmer@icloud.com>> wrote:
> But seriously didn’t you used to hit 85 on the freeway? What kind of RPM were you reaching?
> Jeff