Hey people,
I found this light weight crank pulley: http://www.dragtimes.com/parts/Aveo-Kal ... 90643.html
anyone see this / have any experience with it?
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Hey people,
I found this light weight crank pulley: http://www.dragtimes.com/parts/Aveo-Kal ... 90643.html
anyone see this / have any experience with it?
Thats another part xiaogary has. He can get us all kinds of stuff.
Jeez, $260 for a crank pulley. Most expensive I've ever seen is maybe $180.
I should take my crank pulley into a local machine shop and see how much they'd charge to pump out 5-10 pulleys. Anyone interested?
I remember someone trying to make a lightweight crank pulley in the past, the result was too minimal on the 1.6L to make any noticable difference. I think it was like 2 whp on a dyno.
Invest that money into a lightweight flywheel instead, that's what I would do anyways.
Anyone know how much Xiaogary sells his light weight pulleys for?
^^ that much, thats one of his listings, its a rover ad..
we lose out with him because of the exchange to the expense of owning a car over there, he explained it once. his aveo cost like $50k us? or something like that..
Quote:
Originally Posted by Nemasys
I'd reduce the diameter and make it an underdrive pulley. Won't gain a ton more, but I'd guess you would see 2-4hp at the wheels. Thats not that bad at all for a simple bolt on item.
In any case, I'll look into getting a quote on 5-10 of them just for kicks.
Also, I assume they're different, but has anyone compared the etec and ecotec pulleys?
Thats what I was talking about, a lightweight crank pulley, which was made smaller.
It didnt produce results positive enough to put into production, the cost vs hp gain is way too high imo.
Do you have any specifics about this pulley? Diameter or the % underdriven (most are ~15% from my experience)? Just curious as there is more to it than just making a pulley.
i would be interested in one if you can get your hands on some :D
Designing the pulley is a little more involved. You need to calculated if the other systems can run efficiently at the slower speed. I know a few people alelready have larger radios that dim their headlights adding a 15% drop in speed to the alternator might create a drivability issue.
You also need to consider other things that may or may not be factors in the aveo. In the case of the aveo I would attempt turning one on a lathe to lighten it. In my case could even go underdrive. But I think looking into it could produce a different shortcut.
Its really not that bad. Chances are you'll never even notice the reduction in rpm @ the power steering and A/C compressor. The only thing you should be concerned about is the alternator. So, of course if you have a high powered sound system an underdrive pulley would be a bad idea since you're using more power and need the alternator spinning as fast as it normally would. For a 'normal' car, I don't think a 15% reduction would be noticeable. I've had them on a few cars and never had problems, but I don't run a big sound system either.
In any case, I'll start a new thread where we can discuss the design of this new pulley. I have it mostly drawn up already.
who makes the lightweight flywheel?