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Thread: G Spec VVL Crank Pully + High HP + High Revs = Fail...

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Posts: 81-83 of 83
2009-07-08 19:11:16
#81
Originally Posted by Mazworx
You are assuming that there is only torsional vibration.
Maybe I'm over simplifying it, but that's the only thing I've ever been told, or read about that is a problem with crank harmonics. Additionally, the harmonic damper can only damp torsional vibrations by it's very nature/design. If it solves the problem, then the problem must be in the torsional vibrations. Yes?

Originally Posted by Mazworx
There's also natural frequencies of the individual components.
Sure.

Originally Posted by Mazworx
When the natural frequency of the crankshaft matchs the oil pump then you achieve resonance.
You mean when a multiple of the natural frequency of the crankshaft matches a multiple of the natural frequency of the oil pump?
Okay, I'll buy that.

Originally Posted by Mazworx
And of course damage to the oil pump will occur before damage to the crankshaft due to the mass of them.
I have some more reading to do. I didn't think mass determined likely failure rate due to resonant vibrations, but it sounds... plausible.
Last edited by BenFenner on 2013-12-11 at 19-07-56.
2009-07-09 16:53:55
#82
Guys I'm sorry i got here this late, but i don't always have time to read the forums for my own personal satisfaction.

Payu, I'm truly sorry about your motor. This is more than a business to me, it's my life, and i take some things personal. I don't like my products being part of a failure.

I want to clear up a few things I read about in this thread, thanks to ben for really doing alot of it for me. This will be the definitive post on this.

Crank pulley spacer:
DE Motor, DE oil pump, DE Oil pump drive/spacer: Adding the pulley will only require the spacer. it doesn't need the flat spots on the side to match the oil pump drive, but now I only supply them that way because I'm paranoid and can't afford to buy more pumps.

DE Motor, VE (or GTi-R) oil pump, DE Oil pump drive/spacer: Spacer must be notched.

VE Motor, VE everything else: No spacer needed when using OEM oil pump drive/spacer.

Oil Pump Kits
When I sell the kits I supply the VVL oil pickup. This ONLY works on FWD motors (not GTI-R, BB or Avenir) because of oil pickup placement. We need the GTI-R oil pick up for AWD motors. I have had them on order for almost 2 years, but haven't been told they're discontinued though they may have been. Because the flange is wider on the VVL and GTI-R oil pumps, the early pick up tubes will not just bolt on. Now, yiou can either take the VVL pick up supplied, cut the flange off and re-weld it to your existing pick-up or you can fab up something yourself. Unfortunately, that's the way it is for AWD motors. if you have a GTI-R and want to change to a VVL pump, you would only need the pump and pulley.
2009-07-09 17:29:29
#83
^^^^ Its cool Greg but like I say before this pulley its no good for my application not bashing the product... I tried it and had to learn the hard way that the motor didnt like it...
I didnt buy the pump and the VE oil pump drive from you just the pulley and the pick up I just modify a DE one to fit the VE pump so you dont have to worry...
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