<VV> Re: HV carbs

[FrankCB at aol.com]

Harry,
       Well, ALMOST the same, but not exactly.  The Carter YHs used on the 
early 6 cyl Corvettes and some straight 6 cyl Nashes (remember them?) had vacuum 
advance ports drilled and tapped.  The YHs used on the turbo Corvairs did NOT 
include these handy ports and so make it more difficult (but not impossible) 
to add vacuum ignition advance to turbo Vairs.  However, you could simply 
switch the Vette/Nash YH throttle body section with a Corvair turbo YH throttle 
body (as I did) add a NA Corvair distributor advance "pot" and then have your 
turbo Corvair with vacuum advance.  This improves both part throttle response as 
well as highway cruising gas mileage since you no longer have a CONSTANT 
ignition timing from idle to 4000 rpm (assuming no boost) as the factory intended. 
 But don't forget to provide SOME method of retarding timing when you develop 
turbo boost.  See the Turbocharging chapter in the Corvair Basics Manual for 
more details.
       But you know all this already, don't you Harry?
       Regards,
       Frank "likes variable timing" Burkhard

In a message dated 6/4/05 10:04:49 PM Eastern Daylight Time, 
hyarnell1 at earthlink.net writes:

> These were Carter YH's. Same as the corvair turbo units. NOT HV's!
> 
> Harry Yarnell
> perryman garage and orphanage
> perryman, MD
> hyarnell1 at earthlink.net
> 
> ----- Original Message ----- 
> From: "Jim Houston" <tampatexan at earthlink.net>
> To: "Dennis &Debbie Pleau" <ddpleau at earthlink.net>
> Cc: <virtualvairs at corvair.org>; "Lew Rishel" <lewrish at tns.net>
> Sent: Saturday, June 04, 2005 9:15 PM
> Subject: Re: <VV> Re: HV carbs
> 
> 
> >One of the early Corvette 6 cyl engines used 3 side draft single barrel
> >carbs.  I had a set up on my '51 Chev 6...   went well..!!
> >
> >Jim Houston
> >Brandon, FL
>