Re: Scirocco running 12-13 sce 1/4 mile

[VWMikeLVW@aol.com]

In a message dated 2/20/01 6:32:47 AM Pacific Standard Time, 
sixteen.volt@gte.net writes:


> I definitely don't know much about the different kits sold through time, but
> I have studied turbo design a little, and AFAIK a wastegate DOES vent to the
> atmosphere, and that's a good thing. But some of them blow exhaust directly
> into the atmosphere from the turbo (i.e. into the engine compartment), while
> most route it into the exhaust *after* the turbo (like the Impreza, you
> friggin' lucky Brit!) to ensure all exhaust goes through the emissions
> equipment. Is this what you mean by "internally"? As far as no wastegate, it
> is entirely possible that the BAE kits didn't have one at all, as I know a
> number of (especially older) turbo designs had no wastegate, and just relied
> on low boost pressure to keep from destroying the engine. There are some
> turbos out now that don't require wastegates, using variable turbine blade
> pitch to control their speed.



Yes, there was no wastegate.

> Now, a blow-off/pop-off valve...that's on the *intake* side of the turbo,
> and a completely different device.


Normally, it is...but in this case a sort of "blow off valve" is used to vent 
excess boost and is the method of how boost is controlled.

Mike
http://www.geocities.com/vwmikel - trust me, a replacement is on the way!
'84-Arkay Turbo Rabbit GTI
'84-Rabbit GTI - future DCI drag car
'77-Rabbit - project
'80-Scirocco S - (um... to be:1.9L crossflow, turbo, 6 speed, widebody?)