CorvAircraft> variable valve timing on corvair?

[kevin golden]

I have had 2 Geo metro convertibles.  One I still own as it is my baby and will probably never get rid of it.  That said, the 3 cylinder Metro engine is the worst part of the whole car.  Originally I thought about putting one in an airplane, but after putting 100,000 miles on one I have decided there are better alternatives.  I still would consider the 4 cylinder suzuki, but it is a different engine.  The biggest problem with the Geo 3 cylinder is you cannot get parts.  Chevrolet don't want to deal with anything with a GEO name on it.  It don't work to go to Suzuki either as there are too many differences.  The Geo Metro engine is a Suzuki based engine.  It has a completely different head.  
 
The Geo metro engine don't have a balance shaft.  It would probably benefit from one, but it was never done.  The 3 cylinder is a rough running engine at idle.  It is the nature of the beast.  It fires every 270 degrees and that is why early attempts at putting a reduction unit on these didn't work.  The power pulses are so far apart it will beat the reduction unit into scrap metal.  I guess the rubber couplers were the answer to making the whole thing work.  
 
Kevin.
 
> Date: Wed, 2 Jan 2008 09:09:23 -0800> From: planecrazydld at yahoo.com> Subject: RE: CorvAircraft> variable valve timing on corvair?> To: corvaircraft at mylist.net> > Thanks for the comments Eric. It is amazing that it is that lightweight if it has the balance shafts!!!> > Eric Overton <eric at overtonphoto.com> wrote: David --> > At 05:56 AM 1/2/2008, you wrote:> >Does that mean that the 3 cylinder Suz engine has balance shafts and > >the 4 does not? I had assumed from all the messages on that list > >that they were simply the same block with a cylinder lopped off for > >the 3 cylinder (sorta).> > I don't know about the Suzuki's (and not being a Geo Metro > owner, I'm not 100% sure about them, either), but I'd be surprised if > any 3 cylinder engine didn't have at least one -- and more likely two > -- balance shafts with phased, counter-rotating > counterweights. That's just something that you have to do with 3 > bangers, and contrary to (some) popular belief, there's no way around > it with internal engine balancing of the primary components. You can > certainly *reduce* vibration that way, but you'll never get rid of it entirely.> Bear in mind that a lot of 4 bangers also have balancing > shafts, so it's not that big a leap...> > -- Eric> > > _________________________________________________________> search the CorvAircraft archives at http://www.maddyhome.com/corvairsrch/index.jsp> to UNsubscribe from CorvAircraft, send a message to CorvAircraft-leave at mylist.net> Other CorvAircraft list info is at http://www.krnet.org/corvaircraft_inst.html> > > > Dave Downey> Harleysville (SE) PA> 100 HP Corvair> > > > ---------------------------------> Be a better friend, newshound, and know-it-all with Yahoo! Mobile. Try it now.> _________________________________________________________> search the CorvAircraft archives at http://www.maddyhome.com/corvairsrch/index.jsp> to UNsubscribe from CorvAircraft, send a message to CorvAircraft-leave at mylist.net> Other CorvAircraft list info is at http://www.krnet.org/corvaircraft_inst.html
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