Re: Variable valve timming

["Daniel Brideau" <dan@hobbyetc.com>]

Alfa Romeo had an engine in the late eighties that used oil pressure to adjust
the valve timing.

Honda claims nearly 20 horsepower difference between similar displacement
variable and non variable engines.

~20 HP out of a  ~100 HP engine pretty significant gain.

Dan Brideau
http://www.type53.com/





> I'm thinking this sounds like a job for hydraulics. Perhaps using an electric
> pump similar to what is used in hydraulics for suspension (think Dre Day -
> '64 Impala) A combination of this and an RPM switch which you could buy from
> any muscle car shop should get you going. Oil pressure seems like a bad idea
> because it varies so much during warm up. The other end of this is that I
> don't think it would be worth it in the long run.. I mean they sold those
> mechanically advancing cam sprockets back in the day and they only gained you
> like 3 hp. What were your experiences when you misaligned the cam? Was it
> better low end or something?
>
> Mike
> http://www.geocities.com/vwmikel - trust me, a replacement is on the way!
> '84-Arkay Turbo Rabbit GTI
> '77-Rabbit - project
> '80-Scirocco S - (um... to be:1.9L crossflow, turbo, 6 speed, widebody?)
>


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