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$ 199.457
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Upgrade Your Classic GM to 105A with 1-Wire Self-Exciting AlternatorIs your classic Chevy or Buick struggling to keep the battery charged? Original OEM 10SI alternators (typically 63A or 85A) were not designed for today's high-demand accessories – EFI, electric fans, high‑power stereos, LED lights, and cooling fans. Common symptoms include dim headlights at idle, battery drain after short trips, voltmeter drops when using accessories, or a dead battery after sitting.Our solution – 105A 1‑wire high‑output alternator This direct‑fit replacement upgrades your factory 10SI alternator to 105 amps with self‑exciting one‑wire technology. No external voltage regulator. No excite wire to the ignition switch. Just connect the main output and it starts charging.Key Features1‑wire self‑exciting – Turns on automatically at 1200‑1500 RPM (your engine idle or a slight rev)105A output – Easily handles electric fans (20‑30A), fuel pump (5‑10A), stereo (10‑30A), lights (10‑20A), and other modern accessoriesDirect 10SI bolt‑on – Same case dimensions, mounting ears, and belt alignment as the original 10SIInternal voltage sensing – Regulates at approximately 14.5V (typical)Clockable rear housing – Can be rotated to match your terminal orientationNo external regulator needed – Built‑in regulation simplifies installationCW rotation with 1‑groove pulley – Pre‑installed and ready to runTechnical SpecificationsOutput: 105 Amps maxRegulated voltage: 13.5‑14.7V (nominal 14.5V)Excitation speed: 1200‑1500 RPMPulley: 1‑groove, CW rotationHousing: 10SI case (clockable)Mounting: Direct replacement for 10SI seriesVehicle Compatibility (Partial List)Chevrolet: C10, C20, C30, Bel Air, Chevelle, Suburban (1970s‑80s) with small/big block V8 or V6Buick: Century, LeSabre, Electra, Apollo (1970s‑80s)Also fits: GMC, Oldsmobile, Pontiac with 10SI mountingEngines: SBC (305, 350, 400), BBC (396, 427, 454), 4.1L V6, 3.8L V6, and many othersOE Replacement Numbers: ADR0335, 334-2114, ADR0325, 7127-SE105, 400-12340, 20-102-7What’s IncludedAlternator (105A, 1‑wire, 10SI case)1‑groove pulley (installed, CW rotation)No plug or pigtail needed – just the B+ terminalInstallation Notes & TipsDisconnect battery negative before starting.Remove old alternator and mount the new unit using original brackets. Ensure belt alignment is straight (use shims if needed).Connect a minimum 10‑gauge wire (8‑gauge recommended) from the alternator output (B+ stud) to battery positive or starter solenoid main terminal.No excite wire is required – the alternator self‑excites when revved to about 1500 RPM.If you have an original warning light, it can still work. However, the light may not turn off until the engine is revved – this is normal for 1‑wire self‑exciting units.Reconnect battery, start engine, and rev briefly to 1500 RPM to excite. Check voltage at battery – should read 13.5‑14.7V.Common Mistakes to AvoidUsing too small gauge wire – causes voltage drop and heatPoor engine ground – alternator won’t charge properlyBelt too loose or misaligned – squealing or low outputForgetting to rev the engine after installation to excite the alternatorWarranty & Quality Assurance1‑year hassle‑free replacement – If the alternator fails to charge, makes bearing noise, or has electrical issues within 12 months, contact us for a direct replacement.Tested with DV Canada equipmentISO 9001 & IATF 16949 certifiedUpgrade your classic GM today – reliable charging for all your modern accessories.
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