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#1
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"underdrive" pulley?
I'm building a street/strip big block and need some help.
I've eliminated my mechanical water pump and gone electric, no power steering or any other pulleys...just crank and alternator. My question is this: what can I pull a "smaller" pulley from to drive my alternator? I don't want to buy an aftermarket aluminum one just something that's going to spin me fast enough to keep me charged. I realize the most common reply will be to "go to the local scrapyard and start looking"....well that's fine and all but I'm sure this isn't the first time that somebody has done this. As always...THANKS |
#2
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My question is why? If it is only feeding the alt, going to a smaller crank pulley won't even save you 1 hp.
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#3
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...and that folks is why I ask these questions!
That's one less part I need to buy. I seriously thought it would be good for 5 to 10 hp by changing pulleys Now I know! Thanks |
#4
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Quote:
Electric water pump only saves you around 3 to 5 hp. Also had the fuse blow a couple of times on the electric water pump, and things got hot real quick! If running an elect wtr pump, use relays in the circuit for starting it, and have an indicator light on your dash to show its running. Otherwise, you will be at 250 degrees before you know it!! Also bought one of the warning lights that come on when the temp gets to 230. Got it from Summit. I have the smaller drive pulley on my engine, which can save a few hp because you are not spinning the alternator that fast, but your alternator may not work well at low rpm as far as amp output, so I keep the idle at least at 1200, which also means my mechanical water pump does better at idle. |
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