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midlife510

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  • Location
    Carlsbad, CA
  • Cars
    71 510 2 Dr SR20DET

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  1. Great thread converting the electric sender/ pinion on the SR20DET tranny to a mechanical unit. BUT... I've also read about keeping the electric sender and installing an electric speedo. I'm trying to decide which I should do. What better way than a pro/ con on each? I'm interested in everyone's input/ corrections/ etc.... Oh, I'm not considering the GPS speedo version... wouldn't meet my needs... and perhaps a bit too controversial to keep the thread focused... ;) Here's what I'm thinking... Cost: Mech is likely cheaper, but by a lot? Calibration - Mech: swap pinion gears. Elec: At least for Auto Meter, drive 2 miles and you're done (other brands have similar methods). For further reading, an interesting article on calibration Longevity - Mech: risk replacement due to wear and tear (failure is rare from what I've heard) and outdated/ hard to get parts. Elec: much fewer moving parts, more modern and therefore better parts availability. VSS (Variable Speed Sensor) input on ECU: OK, so I haven't finished researching the benefit of sending a VSS signal to the ECU. From what I can tell, sending a speed signal to the ECU should result in better engine management and tuning options. For mech speedo, I haven't figured out how to drive the speedo and also send a signal to the ECU. For elec speedo, it is straightforward/ a default config - the VSS signal goes to the speedo and the speedo provides the signal to the ECU. Thoughts/ inputs/ comments (corrections?)? TIA
  2. Newbie here, getting back into 510's after 25+ year hiatus... great forum... trying to get my speedo working with my sr20det... i've been able to source everything except the pinion assembly (32702-58S20). Any thoughts where I can get one? I've also posted int he classified. Thanks!
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