This may save you some mathmatical effort, flat batery, and
shot altinator.
I am getting myself some halogen conversion hedlamps, so like any
one with half a brain, I did some calculations. Heres what I came
up with.
I have two 50W 4.1A * 2 = 8.2A Driving lamps, main beam only.
I plan to fit, a halogen conversion, initialy with 60/55W 5A *2=10A
bulb, after that 135/100W bulbs 11.25A * 2 = 22.5A
Other electricals include:
Other lights, 6A average.
Windscreen wiper, 7A average.
Stereo ignition, ect 5A.
So when I upgrade, my lights to the 135W veriaty, I whill have
a curent draw of 48.7A max, given my spitfire altinator is
rated at 35A, my batery will have a charge current of -13.7A,
thus a 65A altinator is needed me thinks, and my batery will
charge as well.
How much power is that?
Its 584.4 W, with the altinator efficiancy being 50%,
it gives me 1.2kW. This means when I drive in the
pouring rain, heater on, windscreen wipers, lights on
fullbeam, I will be sucking a masive 1.6BHP from the
engin. This leave me with only 69BHP, a 2.25% drop
in power.
Most people seem to what to spend a lot of money to
get this power increse. I say to them, turn your
lights off when overtaking, it's cheaper;-)
Ok, I confess, I got board over me coffee break.
--
James Carpenter
Yellow '79 spit wired by a trained marmot
|