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Join Date: Mar 2002
Posts: 3,563
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JoeA, those things can run 18-24 volts when they go real bad and they'll blow the ECU or draw way too much current from the injectors and blow out the injector driver internally.
Just a warning for others, that's all.
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Merv '89 911 Turbo Cab Protomotive MAP ECU, Twin Plugged Heads, GT2-EVO CAMs, 3.3L fully finned P&C's, ARP fasteners, C2T head gaskets, Titanium Retainers, Turbo spec valves, springs & guides, 964 splash valves, GT35R BB turbo, GSF Stainless Headers, Magnaflow Exhaust, Full bay Intercooler, TiAL 46mm w/gate, TiAL 50mm BOV, Apexi AVC-R EBC, SPEC Stage3+ Clutch kit, Crane CDI Ignition 
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09-14-2004, 07:15 PM
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Join Date: Dec 1999
Location: TX USA
Posts: 9,804
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One of the critical items in the electrical system that can be blown in an instant with spikes above 18.0 Volts is the factory alarm module!
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Warren Hall, Jr. 1973 911S Targa ... 'Annie' 1968 340S Barracuda ... 'Rolling Thunder' |
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09-14-2004, 07:25 PM
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Agree Warren, but not as critical as a DME or Injector driver! Aaaarrrgghhhh!!!
  
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Merv '89 911 Turbo Cab Protomotive MAP ECU, Twin Plugged Heads, GT2-EVO CAMs, 3.3L fully finned P&C's, ARP fasteners, C2T head gaskets, Titanium Retainers, Turbo spec valves, springs & guides, 964 splash valves, GT35R BB turbo, GSF Stainless Headers, Magnaflow Exhaust, Full bay Intercooler, TiAL 46mm w/gate, TiAL 50mm BOV, Apexi AVC-R EBC, SPEC Stage3+ Clutch kit, Crane CDI Ignition
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09-14-2004, 07:31 PM
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Senior Member
Join Date: Jun 2000
Location: N. Phoenix AZ USA
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You guys are giving me the shakes just thinking of a alternator going this far above its normal rated voltage! I have done a "smoke test" too often with my Brit vehicles and really like a nice stable voltage source!
Joe
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2021 Subaru Legacy, 2002 Dodge Ram 2500 Cummins (the workhorse), 1992 Jaguar XJ S-3 V-12 VDP (one of only 100 examples made), 1969 Jaguar XJ (been in the family since new), 1985 911 Targa backdated to 1973 RS specs with a 3.6 shoehorned in the back, 1959 Austin Healey Sprite (former SCCA H-Prod), 1995 BMW R1100RSL, 1971 & '72 BMW R75/5 "Toaster," Ural Tourist w/sidecar, 1949 Aeronca Sedan / QB |
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09-14-2004, 09:43 PM
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Hehe, well, you are one lucky bugga that yours survived that long at 16v or so... really playing with fire there. All it takes is the Alt or VR to send a Vspike in the danger zone and you'd be looking at a depressing repair bill
 My alternator is totally screwed too (bearings are totally worn), but luckily it was under-charging/supplying under load. I cringe at the thought of it going the other way
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Merv '89 911 Turbo Cab Protomotive MAP ECU, Twin Plugged Heads, GT2-EVO CAMs, 3.3L fully finned P&C's, ARP fasteners, C2T head gaskets, Titanium Retainers, Turbo spec valves, springs & guides, 964 splash valves, GT35R BB turbo, GSF Stainless Headers, Magnaflow Exhaust, Full bay Intercooler, TiAL 46mm w/gate, TiAL 50mm BOV, Apexi AVC-R EBC, SPEC Stage3+ Clutch kit, Crane CDI Ignition
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09-14-2004, 09:52 PM
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