<VV> VirtualVairs Digest, Vol 182, Issue 21

[Dan Timberlake]

FWIW Robert P. Benzinger had this to say to the Corsa National Convention
Seattle, Washington, July 26, 1975.



We wanted rather desperately to match up a turbocharger with an automatic transmission. It has some pretty attractive aspects about it. But we just could never make it go. The thing that you run into - and maybe some of you have even experimented yourself with this combination - is that when you wind up the engine in low gear, get the turbine wound up to full boost and then make the upshift, it suddenly pulls the engine RPM down with the boost still up where it belongs for a couple of thousand RPM higher. With the low engine speed and the blower still wound up, it gets 
into combustion difficulties that makes wild detonation look pale. There was just nothing we could do to get the engine thru this rough spot. Once the malcombustion starts, you can't just shut it off again. Perhaps the availability of a three speed automatic or maybe a four speed would have done it by getting the gear steps tighter. But with Powerglide being a two speed set up we could never find anyway around it.

http://www.vv.corvair.org/Library/benzinger.htm

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> Message: 1
> Date: Fri, 06 Mar 2020 13:43:55 -0500
> From: Hugo Miller <hugo at aruncoaches.co.uk>
> To: <virtualvairs at corvair.org>
> Subject: <VV> Turbo PG's?
> Message-ID: <3c462aa719436dcf7bd341293f698739 at aruncoaches.co.uk>
> Content-Type: text/plain; charset=UTF-8; format=flowed
> 
> I gather that Spyder engines and Powerglides are not a good mix? I had
> always understood that the torque output from the Turbo engine was
> actually lower than the non-turbo at low revs. But I've just seen some
> graphs which suggest the opposite?
> I am on the point of rebuilding a 164 140 to go in my PG, but a good
> Spyder engine has just come on the market, which would save me the job
> of rebuilding the 140.
> Any observations?
>