CorvAircraft> variable valve timing on corvair?

[Carlos Romero]

I have 1991 daihatsu charade with a 3cyl 993cc engine and yes it has a 
balance shaft gear driven off the crank. 41 mpg, 208000 miles on the 
odometer just had to tell ya. You can feel the oscillations particularly 
at low idle, it smoothes out as you give it gas.
CBRomero

David Downey wrote:
> 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
>
>
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>
>   Dave Downey
>   Harleysville (SE) PA
>   100 HP Corvair
>
>
>        
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