At 09:13 PM 6/10/2010, Greg Schroeder wrote:
>New alternator passed at the parts store and seems to be working in the car,
>but I am seeing around 12 volts and I was expecting higher.
Greg,
What was your engine rpm? If you were idling at about 750, that is
about right.
Usually, the older cars alt. didn't put out until the rpms were over 1000 rpms.
So try increasing the rpm just a little and see if the voltage doesn't go up.
>One issue I am seeing is when starting the car there is a large drain on the
>battery voltage. Sometimes after one or two failed starts it seems
to almost
>drain the battery.
If you are watching the voltmeter when cranking the engine, yes the voltage
will go down a lot (relatively), some place around 10 to 11 volts. This is due
to the large current drain of the starter, and the internal
resistance in the battery
and terminal connections.
>I have installed a mini starter a while back and I was wondering if the mini
>starter has a larger power draw than the standard. I have search
the internet
>and it seems to always point to the mini as having more torque and less
>weight, but I cannot find any information to compare the power draw.....
Usually these due draw less current. But the old style starters used to draw
something like 200 to 400 amps. The new reduction starters still something
like 75-100 A. Which is quite a lot. If I remember correctly, the original
alternator on the B is rated at something like 65 A.
John
John T. Blair WA4OHZ email: jblair1948@cox.net
Va. Beach, Va
Phone: (757) 495-8229
48 TR1800 48 #4 Midget 65 Morgan 4/4 Series V (B1106)
75 Bricklin SV1 (#0887) 77 Spitfire 71 Saab Sonett III
65 Rambler Classic
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