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#1
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Speedometer calibration after 4.11 swap
I've got my 4.11 trans and rear differential swapped into my 1992 SVX. Everything works great, but I've found that my speedometer now reads about 10% faster than my actual speed. Has anyone come up with a solution to this problem. I'm not so concerned about the inacurate reading on the speedo, but I don't like the idea of clocking up 1.10 mile on the odometer for every mile I drive! If any of you SVX geniuses has come up with a fix for this, I'd appreciate hearing about it.
Thanks A Lot Steve
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1992 SVX lsl - >111K, pearl, 4.44 gears, ECUtune stage 1 2005 Outback XT wagon - i love that turbo!!!! 2004 Dodge Ram 1500 Hemi |
#2
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Get bigger rims. The speedo on my car is 10% over and I'm running stock 14's on my 4.111 geared Legacy.
Swapping up to larger rims will fix the problem.
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-Jason (8/23/07-Present) 1995 Subaru SVX LSi (197k) Polo Green (#1102) 03/95 Mods: DDM Tuning 4500k 35w Low Beam HID, 100w H3 Bulbs, Extra Ground Cables, 15 minute $12.96 mod, svxfiles designed transmission mount (), sporting a "new" tail light bar, silver BBS rims, custom power steering cooler (one that doesn't dump ATF constantly), new negative lead cable, no more third or fourth gear (1977-Present) 1977 Chevrolet Corvette (81k) Silver (12/01/2011-Present) 2005 Subaru Outback 2.5i Limited 5MT (97k) I have a bad feeling about this. -Obi Wan Kenobi |
#3
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Besides changing the rims.
I believe the fix is to swap out the speed sensor from the SVX box into the 4.11 box.
Harvey.
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One Arm Bloke. Tell it like it is! 95 Lsi. Bordeaux Pearl, Aust. RHD.149,000Kls Subaru BBS wheels. 97 Liberty GX Auto sedan. 320,000Kls. 04 Liberty 30R Auto Premium. 92.000kls. |
#4
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Quote:
Steve
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1992 SVX lsl - >111K, pearl, 4.44 gears, ECUtune stage 1 2005 Outback XT wagon - i love that turbo!!!! 2004 Dodge Ram 1500 Hemi |
#5
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We discussed this a while ago. A number of us have come to realize the SVX is usually 4mph slower than the speedo. Kinda goes along with the pessimistic gas gauge.
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ASE Certified Master Automotive Technician w/L1. ASE Certified Master Medium/Heavy Truck Technician. Certified EVT (Emergency Vehicle Technician) |
#6
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Pessimistic gas guage. It down right lies. Drove on empty for 20 miles and still had 7 gallons left.
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Gene and Ben 1992 SVX LS AWD 110K - Liquid Silver 1994 SVX LSi AWD 128K - White Pearl (daily driver) 1994 SVX LSi AWD 95K - Emerald Pearl (sold) 1992 SVX LS-L AWD 115K - Dark Teal 4.44 swap (sold) |
#7
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#8
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Well you could reposition the speedo needle using a GPS to calibrate your speed. I believe Lwin/Seraph does this with every SVX he goes through.
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David B. SVXipedia @ SVX-IW.COM -- SVX Information Warehouse 2.0 coming...eventually! Ebony 1992 SVX LS-L 5 spd Koni/GC Stebro 187k miles RIP (Rust In Pieces) 1993 SVX 5 spd Koni/GC Stebro Polyurethane bushings still available! |
#9
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The problem with re-positioning the needle is that my speedo is about 10% off. The inacuracy is not linear with increased speed. So the difference between indicated speed and actual speed increases the faster you drive. For example 70 mph indicated = 63 mph actual or 7 mph off, 90 mph indicated = 81 mph actual or 9 mph off. If I were to simply re-position the needle, the speedo would only be truly accurate at one speed. I think I've heard of an electronic box that can be wired in with your speed sensor that will allow corrections. Has anyone else heard of such a thing? Steve
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1992 SVX lsl - >111K, pearl, 4.44 gears, ECUtune stage 1 2005 Outback XT wagon - i love that turbo!!!! 2004 Dodge Ram 1500 Hemi |
#10
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Yes that is correct. The difference is a percentage and moving the needle won't be perfect but it will be a little more accurate. I do not know of anyone here using an electronic device to calibrate their speedometer yet.
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David B. SVXipedia @ SVX-IW.COM -- SVX Information Warehouse 2.0 coming...eventually! Ebony 1992 SVX LS-L 5 spd Koni/GC Stebro 187k miles RIP (Rust In Pieces) 1993 SVX 5 spd Koni/GC Stebro Polyurethane bushings still available! |
#11
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Check out this link: http://www.terf.com/SpeedChangerPage.htm
There are others out there as well. Some don't work with AWD or ABS. This company has experience with Subarus and hasn't had any problems. Are our speed sensors 2-wire or 3-wire? You can also do a search for "electronic speedometer calibration" or "electronic speedometer recalibrator" .
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. Subaru Ambassador 1996 Polo Green LSi #216..138,100 miles...SOLD JFICX8659TH100216.....Date of Manufacture: November 16, 1995..... Fuji Heavy Industries..Ōta North Plant....Ōta City,. Gunma Prefecture, Japan In-Service Date: January 2, 1997 "The Pristine Green Polo Machine” First Polo Green on the Network First Clear front turn signals, JDM Alcyone hood emblem, rear panel, and BOXER engine cover on the Network (US) (2000) First 5000K HID factory fog lights (2007) First SVX JDM BBS wheels on a USDM SVX (2013) HID lighting (5000K) for headlight and H3 fog lights, PIAA SuperExtreme 120W high beams, rebuilt EG33 longblock, Cometic head gaskets, Phase II flexplate, AMR aluminum radiator with custom silicone hoses, 160A high-output alternator in aluminum-ceramic coated case, new design alternator wiring upgrade v.4, rare factory headlight protectors, refinished JDM BBS mesh aluminum wheels and custom, polished billet aluminum new hex center caps, LED grille mod, R1 Concepts high-carbon cryo slotted rotors, Akebono ceramic pads, Goodridge S/S braided brake lines, Smallcar Stage 1 shift kit, ThermalTech aluminum/ceramic-coated valve covers, Energy Suspension urethane front & rear swaybar bushings, Bontrager22 rear swaybar with QS Components Chromoly Teflon/Kevlar endlinks, "$15.00/5 minute" suspension mod. Hella Supertone horns, Custom stainless steel exhaust system with 2" headpipes, Magnaflow cats, AeroTurbine AR25 resonator /AWD "Bullet" muffler. R.I.P. 2010 Subaru Outback Limited 2.5 CVT...338,000 miles. Totaled by a 1,300 lb. COW March 4, 2016 2014 Hyundai Avante Limited ...178,000 miles. Actually quieter and smoother than the Outback 2007 Mazda Miata MX-5 PRHT...102,000 miles. Plenty of parts, service and windshields. 4th Registered Network member —2/21/2001 My NEW locker..I...My Email..I..Wikipedia/SVX . . |
#12
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Ours are 3 wire
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David B. SVXipedia @ SVX-IW.COM -- SVX Information Warehouse 2.0 coming...eventually! Ebony 1992 SVX LS-L 5 spd Koni/GC Stebro 187k miles RIP (Rust In Pieces) 1993 SVX 5 spd Koni/GC Stebro Polyurethane bushings still available! |
#13
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^^^ a.k.a. 'Hall Effect'.
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ASE Certified Master Automotive Technician w/L1. ASE Certified Master Medium/Heavy Truck Technician. Certified EVT (Emergency Vehicle Technician) |
#14
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I would be more than happy if someone comes up with something to correct this. -Pavan. |
#15
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Could someone explain how this error could happen by a swap?
My understanding of the speedo setup is that a gear is driven from the right side axle, which in turn does some magnetic signaling that gets decoded and sent on to the speedometer. My point is the speedo, since it's driven by axle revolutions, should register exactly the same (good or bad) before & after, regardless of the ratio installed. So, which automotive class do I need to take over again? |
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