I saw that too Mike. It left me with more questions though. The gauge could still be rated at 50 amps since they over engineer stuff like this by about 10%. Its unlikely its a 55 amp gauge because that would be an oddball. Even with this information, I think we are honed down to a level we can work with. 50 or 60, the difference in shunts is so miniscule that only laboratories have the test equipment to tell the difference.
Check this out...
http://www.summitracing.com/parts/sww-413717If you read the paragraph it says "Are you still using those 6 V gauges, but are converting your vehicle to a 12 V system? If so, don't fall victim to a burnt-out gauge. Available in several amp ratings, these Stewart Warner ammeter shunts will ensure that your 6 V gauges are not affected by your 12 V conversion."
Although it plays to people that think voltage has anything to do with it, but its a good play because its a necessary item to properly upgrade your system to a higher output charging system.
Problem now is, the geniuses at Summit do not have a listing for the "available in several amp ratings" part so I am battling with them right now trying to get a list of what amp ratings are available.
