Join Date: Nov 1999
Location: Palm Beach Gardens, FL
Fan motor starting current is approx 3X running current. Starting current is what's killing you.
I did many measurements on Mark VIII fan when I first got it & was using relays. Even with 3G alternator, smaller alternator pulley, etc., engine would almost die when fan kicked on. This was way before I had Megasquirt. Soft start fan controller is the best solution, with the DCC I don't even know when the fan starts if it weren't for an indicator light.
1988 GT, 57k mi, Orig Owner
ProCharger P600B, FRPP Headers, Flowmaster F2, 3G Alt, Mk8 Fan/DCC, 3.55's, Prog Springs, ST Brace, G/Trac Bar, Subfrms, UCA, LCA, FCA, Tokico 5-ways, C/C Plates, CSA 16x8, Bridgestone RE760 Sport 225/50R16, Megasquirt DIYPNPF60, LC2 WBO2, C&L76mm MAF w/LU47's