What do you think of this! - Hyundai Performance Forums

racecar127 · 06-12-2004, 01:33 PM

There talking about crank pulleys and how they might possibly damage you engine (bearings) in the long run.

Quote:

[body]Update- READ!!!
Since the original writing of this article, a few of us with these pulleys have done much more research. Billy has recently had his engine built up by Larry at Endyn. Upon dissasembly of the engine, Larry reported that the bearings, with 40k miles on them, looked like they had "a hard life." Roughly 20k of those miles were before the pulley, 25k of them after.

We have no idea what the bearings from a 45k mile engine are supposed to look like, but by comparing the #1 bearing to the #5 bearing in Billy's engine the difference is stark. The # 1 has deep grooves which have worn away all the original machining marks, still visible on his #5 bearing. Larry also reported that his oil pump was so damaged as to be unusable.

While we aren't going to detail all the arguments for or against pulleys, or tell you what you should do with your daily driver or track-only car, we (and Larry feel that the damage in Billy's engine far outweighs the benefits seen by the pulleys.

For comments or questions, e-mail me.

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[Edited by racecar127 on Jun 12, 2004 9:36 AM]

Kemper · 06-12-2004, 04:28 PM

That's kind of old news.... thats the big debate with the pully.

AUTOBOT · 06-12-2004, 05:54 PM

Yeah, this is old news. Some say it does damage bearings others don't. It may be different on different engines too.

Basically, if you are worried about it, don't do it. It doesn't give a huge gain anyways.

**i8acobra** · 06-15-2004, 04:18 PM

What matters is whether the engine is internally or externally balanced. If it's internally balanced, a pulley won't hurt anything. If it's externally balanced, a pulley would be a bad thing. Before anyone asks..... no, I don't know if the Beta is internally or externally balanced. But, I will try to find out.

Mad-Machine · 06-15-2004, 11:33 PM

well.. it could also be this... the stock pulley kind of balances out the stock heavy flywheel... would adding a lightweight flywheel make ALL the bearings wear badly, or even the wear out to near stock levels?

ALso, they never did mention what kind of life that car lived.