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Date:         Thu, 19 Apr 2007 19:26:32 -0400
Reply-To:     David Milo <dellaone@GMAIL.COM>
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         David Milo <dellaone@GMAIL.COM>
Subject:      Re: Temp Gauge calibration with Subaru engine
Comments: To: Jim Akiba <syncrolist@bostig.com>
In-Reply-To:  <007701c782b5$7fa85c20$7ef91460$@com>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed

This is actually common practice. It is very easy to drill and re-tap the coolant manifold for the Syncro style sensor, thus getting the original system with a new engine attached to it.

Dave

On 4/19/07, Jim Akiba <syncrolist@bostig.com> wrote: > > What about just using a stock syncro sensor? If the subie coolant is > around > 180, you should have no trouble. The zetec coolant is usually around > 192-200, and the stock syncro sensor screws right into one of the stock > sensor bungs in the t-stat housing. If you could find a bung on the subie > system and adapt it you should be fine. > > We don't re-calibrate, and other than the gauge reading higher than it did > with the boxer everything works fine. The dash gauge should only be used > as > backup or ballpark anyhow IMO because it isn't very accurate to begin > with, > with lot's of variance based on wiring conditions van to van... and if > something happens and the passage runs dry, you'll have no idea what's > going > on until it's too late. > > > Jim > > > ________________________________________ > Bostig Engineering > Engine Systems Voodoo > http://www.bostig.com/ > 617.272.3800 > > > > > > > -----Original Message----- > From: Mark Drillock [mailto:drillock@EARTHLINK.NET] > Sent: Thursday, April 19, 2007 12:51 PM > To: vanagon@GERRY.VANAGON.COM > Subject: Re: Temp Gauge calibration with Subaru engine > > The problem is that your approach only calibrates for normal temp. It > does nothing to address the issue I expressed doubt about. The VW temp > gauge has an over temp warning led circuit built into the gauge to get > the driver's attention when the temp is too high. How does your resistor > affect the point at which this warning is triggered? > > Mark > > Paul Guzyk wrote: > > > In my experience, Subie engines run normally at about 178-183 degrees C. > > > > When installing a Subaru into a Vanagon, I now use the Subaru single > > wire (for dash) temp sender and the B10 scan tool > > http://www.graphics.cornell.edu/~v/b10scan/ with an old PC to > > initially ensure the engine is running at proper temperature (the B10 > > software uses the Subaru two wire ECU temp sender). > > > > Once the engine is consistently running around 180 degrees, I then > > try different resisters (15-30 ohm usually) inline with the single > > wire Subaru temp sender until the Vanagon dash temp gauge is right in > > the middle (over the LED). > > > > That's how I calibrate the dash gauge with a Subaru engine. > > > > Note, the B10 scan tool is for 90-94 engines. I don't think it works > > on newer engines. > > > > > > > >> > >> As to David's issue, this is something that has long troubled me about > >> the method used by many Subaru engine conversions to adjust the Subaru > >> temp sender to the Vanagon dash gauge. Many do this with a resistor, > >> selecting a resistor value that when put in series with the Subaru > >> sender gives a temp gauge reading they are happy with on the Vanagon > >> gauge under normal driving. How this combination of parts could be > >> expected to give consistent readings at all engine temperatures is > >> beyond me but I have not verified that it doesn't. > >>......... > >> Mark > > > > >


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