PG Turbos?? Re: <VV> Re: TURBO BENT VANES

[Mark Corbin]

The engineer didn't actually say that you'd blow the heads off. Rather, he
just shrugged his sholders as an indication of the results, implying that
you'd blow up the engine, or at least have catastrophic failures. Certainly
nothing that GM could stand behind selling to us idiot customers, and you
know that they have to design to accomodate the antics of the lowest common
moron.... (G)

-Mark


> [Original Message]
> From: Tony Underwood <tonyu at roava.net>
> Subject: Re: PG Turbos?? Re: <VV> Re: TURBO BENT VANES
>
> At 09:43 AM 9/11/2007, Mark Corbin wrote:
> >A GM engineer who worked on the Corvair and addressed the CORSA
convention
> >one year responded as to why it was never offered. He said that they
found
> >that with just two speeds in the Corvair's powerglide, the situation
arose
> >that when the trans shifted, you were running high boost and suddenly
also
> >had low RPM. What happens then is that you tend to blow the heads off the
> >engine. With a three-speed, they might have gotten away with it, though.
>
>
> I suspect the fellow was speaking whimsically.   I've seen tweaked 
> 'Vair engines that were overboosted and thus break, and the heads 
> never failed.  Pistons would perforate or collapse and/or break 
> apart, connecting rods would bend, or bearings would mash out causing 
> the rods to beat up the crank journals and heat up the big end and 
> possibly toss a rod, but I've not seen heads blow off, ever.
>
> tony..
>