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#16
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Re: How accurate is your speedometer?
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I don't understand how the speedo/odometer work. Interesting, in using this site to calculate and compare my 3.70 geared 235.40/18 tires with stock 3.545 gears and stock 225/50/16 tires, both in 0.694 4th gear (love this site) http://www.kabamus.com/garage/gears.html Comparing stock tires, 3.70 to 3.545 ratios, 4th gear, the calculated speed increase with 3.545 gears at 2000 rpm is 2.57mph, 2500 is 3.22mph, 3000 is 3.86mph, and 3500 is 4.51 mph (103mph vs 107.51 mph). Now, factoring my tire change: 3.70 gear with 235/40/18 at 3000 equals: 88.29 mph 3.545 gear with 225/50/16 at 3000 equals: 90.18 mph, so, I"m slightly less than 2 mph less in 4th at 3000 rpm, compared to 3.86mph different comparing the same gear change and stock tires. At 2000 rpm, my big tire 3.70 are only 1.26 mph slower than stock tire 3.545 gears, 58.86mph vs. 60.12 mph. What all this has to do with speedo/odometer factory calibration, I don't know, but the numbers are fun. We run 3.545, 3.70, 4.111 and 4.444 gears in our SVXes, so the website helps sort out gear and tire changes. For snow tires on stock rims, you could certainly use 215/55/16, 97-spec. Tire rub depends on the tire size and tread width (different models of same size tire have different tread width), and wheel offset. My 18" '07 Lexus wheels are 10mm closer to the fender than OEM wheels. I can get all fingers between the TOYO VERSADO LX rear tires and the wheelwell .
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Special Thanks to Our Friends and Sponsors: * http://www.alcyone.org.uk/ssm http://www.PhenixWheels.com http://www.dba.com.au/ http://www.ClassicSoftTrim.com http://ToyoTires.com/tire/pattern/versado-lx Gillman Subaru of Houston "QuickChange" http://www.TransGo.com/ http://www.PlanetSVX.com Bontrager Works, '92 Subaru SVX LS-L Claret ORIGINAL OWNER '92 LS-L Pearl~ '92 LS Pearl~ '92 LS-L Teal~ '92 LS-L Silver~ '95 LSi Polo~ '92 JDM Alcyone SVX Version-L 4WS Pearl~ http://www.subaru-svx.net/forum/showthread.php?t=54143 '92 JDM Alcyone SVX Version-L 4WS Ebony~ http://www.subaru-svx.net/forum/showthread.php?t=54117 Last edited by NeedForSpeed; 09-21-2010 at 02:56 PM. |
#17
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Re: How accurate is your speedometer?
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Tony 1996 Polo Green Subaru SVX LSi, 168,XXX miles, Redline D4 ATF, Redline 75W90 gear oil, K&N HP-4001 Oil Filter, Mobil 1 5W50 FS (3qt) and 5W30 High Mileage (4qt) Oil Blend, Motul RBF600 Brake Fluid, AC Delco A975C Air Filter, NGK BKR6EIX-11 plugs, Centric Rotors, Power Stop Evolution Carbon Fiber Ceramic Brake Pads 2005 Gray Acura RL, 165,XXX miles, Redline D4 ATF with Lubegard Platinum Protectant, Mobil 1 5W20 High Mileage Extended Performance Oil 2009 Red Toyota Venza, 123,XXX, Mobil 1 5W30 High Mileage Oil 1992 Red Ferrari 348 ts, 82,XXX, Redline everything |
#18
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Re: How accurate is your speedometer?
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Yes, I effectively and purposely moved the gearing between 3.7 and 3.545. I do not believe this will have any effect on the life of the tranny, certainly less effect than the way I abuse it with my right foot Either way, I like this side better than the other. My son and I built the tranny in the car now, and have done many others, so, that is not a huge problem. I'm already running a hybrid cluster in this car, so, I'm familiar with the units. Where is the 'SPRING' you refer too? I have a couple spare gauge clusters, I'd like to check it out
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Special Thanks to Our Friends and Sponsors: * http://www.alcyone.org.uk/ssm http://www.PhenixWheels.com http://www.dba.com.au/ http://www.ClassicSoftTrim.com http://ToyoTires.com/tire/pattern/versado-lx Gillman Subaru of Houston "QuickChange" http://www.TransGo.com/ http://www.PlanetSVX.com Bontrager Works, '92 Subaru SVX LS-L Claret ORIGINAL OWNER '92 LS-L Pearl~ '92 LS Pearl~ '92 LS-L Teal~ '92 LS-L Silver~ '95 LSi Polo~ '92 JDM Alcyone SVX Version-L 4WS Pearl~ http://www.subaru-svx.net/forum/showthread.php?t=54143 '92 JDM Alcyone SVX Version-L 4WS Ebony~ http://www.subaru-svx.net/forum/showthread.php?t=54117 |
#19
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Re: How accurate is your speedometer?
My 92 is consistantly 5 mph off. I checked it against gps, no matter how fast I go the speedo says I'm doing 5 mph more.
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Giving money and power to government is like giving whiskey and car keys to teenage boys. – P.J. O'Rourke |
#20
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Re: How accurate is your speedometer?
225/50/16?
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Special Thanks to Our Friends and Sponsors: * http://www.alcyone.org.uk/ssm http://www.PhenixWheels.com http://www.dba.com.au/ http://www.ClassicSoftTrim.com http://ToyoTires.com/tire/pattern/versado-lx Gillman Subaru of Houston "QuickChange" http://www.TransGo.com/ http://www.PlanetSVX.com Bontrager Works, '92 Subaru SVX LS-L Claret ORIGINAL OWNER '92 LS-L Pearl~ '92 LS Pearl~ '92 LS-L Teal~ '92 LS-L Silver~ '95 LSi Polo~ '92 JDM Alcyone SVX Version-L 4WS Pearl~ http://www.subaru-svx.net/forum/showthread.php?t=54143 '92 JDM Alcyone SVX Version-L 4WS Ebony~ http://www.subaru-svx.net/forum/showthread.php?t=54117 |
#21
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My speedometer seems to be extremely accurate. It reads the same as the GPS up until 70, at least. Beyond that I won't say.
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"That which can be asserted without evidence can be dismissed without evidence." '92 Dark Teal SVX LS-L, >146,000m 3 pedals, 5 speeds., restoration underway. 2012 Honda Insight, slow but cute. |
#22
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Re: How accurate is your speedometer?
My first two claret were each 4mph under. The teal is about 2mph under. I read on here at one time that most all are around 4 mph under so 10% off the odometer and would be real close. As i said read it somewhere on here, not quoting.
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- Sonny [1992 LSl, Claret 160k] / [1992 LSl, Dark Teal #378 172k] / [1992 LSl, Claret 150k] / [1992 LSl, Liquid Silver donor] / [1992 LSl, Liquid Silver 4.44] / [1997 LSi, Polo green #089, 150k] 1992 Chevrolet Lumina Z34, white 35k miles 1992 Chevrolet Lumina Euro, charcoal grey >200k (first car) 1992 Chevrolet Lumina Euro, charcoal grey >200K (for sale) 1986 Honda VF500F Interceptor 1994 GMC Jimmy S-15 |
#23
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Re: How accurate is your speedometer?
I checked mine at low speed today and mine does the same. Off by the same amount. That is odd. I would have expected a consistent percentage error.
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Tony 1996 Polo Green Subaru SVX LSi, 168,XXX miles, Redline D4 ATF, Redline 75W90 gear oil, K&N HP-4001 Oil Filter, Mobil 1 5W50 FS (3qt) and 5W30 High Mileage (4qt) Oil Blend, Motul RBF600 Brake Fluid, AC Delco A975C Air Filter, NGK BKR6EIX-11 plugs, Centric Rotors, Power Stop Evolution Carbon Fiber Ceramic Brake Pads 2005 Gray Acura RL, 165,XXX miles, Redline D4 ATF with Lubegard Platinum Protectant, Mobil 1 5W20 High Mileage Extended Performance Oil 2009 Red Toyota Venza, 123,XXX, Mobil 1 5W30 High Mileage Oil 1992 Red Ferrari 348 ts, 82,XXX, Redline everything |
#24
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Re: How accurate is your speedometer?
Step 1: Make a speedo that is spot-on.
Step 2: Meet legal spec and keep consumers out of trouble by turning the label 5mph counterclockwise. Step 3: ????? Step 4: Profit.
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Disclaimer: The above post is on the internet. |
#25
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Re: How accurate is your speedometer?
As for Step 2, some, not me, have removed the plastic cover, ran the car at known speed, pulled and repositioned the needle. That would have no effect on ECU/TCU programming though
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Special Thanks to Our Friends and Sponsors: * http://www.alcyone.org.uk/ssm http://www.PhenixWheels.com http://www.dba.com.au/ http://www.ClassicSoftTrim.com http://ToyoTires.com/tire/pattern/versado-lx Gillman Subaru of Houston "QuickChange" http://www.TransGo.com/ http://www.PlanetSVX.com Bontrager Works, '92 Subaru SVX LS-L Claret ORIGINAL OWNER '92 LS-L Pearl~ '92 LS Pearl~ '92 LS-L Teal~ '92 LS-L Silver~ '95 LSi Polo~ '92 JDM Alcyone SVX Version-L 4WS Pearl~ http://www.subaru-svx.net/forum/showthread.php?t=54143 '92 JDM Alcyone SVX Version-L 4WS Ebony~ http://www.subaru-svx.net/forum/showthread.php?t=54117 |
#26
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Re: How accurate is your speedometer?
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