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02-09-2005, 05:13 PM | #1 | |
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about under drive pullys on an LS?
I was told a long time ago that if you get an uder drive pully you need to get a light wight flywheel or you will mess up you harmonic(spell) balencer. is that true? is it worth even getting one? i hear that they work pretty good on N/A cars.
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02-10-2005, 02:25 PM | #2 | |
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Re: about under drive pullys on an LS?
Ok my dumb ass as done a surch and seen this was descused before. i guess my only question would be thin is would or could this be corected by a light wight flywheel? That is what i have herd before and if you think about it, it kinda makes sence.
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02-10-2005, 03:02 PM | #3 | |
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Re: about under drive pullys on an LS?
I don't know about the flywheel thing, but I've heard the aftermarket pullies are bad. Because they are not properly balanced, so when you're at a high RPM it throws your crank into a wobble. I know there are some out there that are balanced, but I've never seen them for very cheap.
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02-10-2005, 04:01 PM | #4 | |
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Re: about under drive pullys on an LS?
that's what i herd to, but if you think about it. If the underdrive pullys is lighter and you put on a light wieght flywheel it would even out the sides.
Ok i found something on overboost.com that might just tell us everything we need to know, well kinda. this is a quote from the site. (Note that we've avoided the topic of underdrive pulleys, one of the most hotly debated items on automotive chat forums. Not that underdrive pulleys are a bad thing in and of themselves, but most of the pulleys out there are not dampened, and that's what leads to hot arguments online. If nothing else, why save weight on a pulley when you can save more weight in a larger diameter at the flywheel? Anyway, let the email flow to editors@overboost.com for now.) here is the rest of the site http://www.overboost.com/story.asp?id=1283
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98 MITSU GST, 1990 TURBO MOTOR 98 ACURA INTEGRA LS 88 HONDA CIVIC HB 97 HONDA CBR 600 91 HONDA CRX DX 89 JEEP Last edited by CBURKE; 02-10-2005 at 04:51 PM. |
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02-11-2005, 01:43 AM | #5 | |
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Re: about under drive pullys on an LS?
the only thing worse than me buying cheap used tires was an underdrive pulley kit back in my youngin days.
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02-11-2005, 04:14 PM | #6 | |
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Re: about under drive pullys on an LS?
Read this thread, you will find some helpful info there. There are some good points made by both sides, so you read and decide what you want to do. But what ever you or anybody els does, DO NOT POST A REPLY IN THAT THREAD! I don't want to see a 1 year old post come back to the top.
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02-11-2005, 04:27 PM | #7 | ||
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Re: Re: about under drive pullys on an LS?
Quote:
that's the one i read, and i desided to do some resurch and see what the hipe is. i see what you are saying and id go with you on the subject. i will not be getting one because what would be the point if it will give me a little power and a lot of probs. i'm still gonna see if i can find something about the flywheel being lighter if it will weigh it out.
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98 MITSU GST, 1990 TURBO MOTOR 98 ACURA INTEGRA LS 88 HONDA CIVIC HB 97 HONDA CBR 600 91 HONDA CRX DX 89 JEEP |
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02-11-2005, 04:37 PM | #8 | |
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Re: about under drive pullys on an LS?
The weight is not the problem, it is the damping of the torsional vibrations. The flywheel being lighter will not affect the torsional vibrations. There is a "harmonic balancer" inside the stock pulley, it is really a torsional vibration damper, but is called a harmonic balancer. You can run a lighter flywheel and it will not cause problems with torsional vibration, it is when you reaplce the crankshaft pulley that you run into problems.
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02-11-2005, 06:24 PM | #9 | |
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Re: about under drive pullys on an LS?
Got Ya Thanks
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98 MITSU GST, 1990 TURBO MOTOR 98 ACURA INTEGRA LS 88 HONDA CIVIC HB 97 HONDA CBR 600 91 HONDA CRX DX 89 JEEP |
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02-12-2005, 01:53 AM | #10 | |
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Re: about under drive pullys on an LS?
ok help me out i heard someone say that our crank shaft is "internaly ballanced" and there isno harmonic balancer on the pulley is there any truth to this? and does the power gain come from the loss in weight or from underdriving (size diference)
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