Pop off valve

[don.broadus at exeloncorp.com]

It Sure sounds like the valves they used at Indy during the Turbo Offy era.
The track  would give you your calibrated pop off valve
to run the race on. Some owners would use an extra large Turbo, so that when
the pop of valve vented the extra boost the Turbo wouldn't spool down that
much, negating the purpose of the pop off valve and horsepower production. I
thought they were modified aircraft parts.   

> -----Original Message-----
> From:	WEG1192 at aol.com [SMTP:WEG1192 at aol.com]
> Sent:	Tuesday, January 02, 2001 11:08 AM
> To:	gmecm at diy-efi.org
> Subject:	Re: Pop off valve
> 
> I used to have a 280ZX turbo and to the best of my knowledge, it was just
> a 
> spring loaded valve sitting on the top of the intake manifold. No wires
> went 
> to it period. I monkeyed with the wastegaste by putting a threaded
> coupling 
> in the control rod from the wastegate to the diaphragm, but I think the 
> pop-off was relieving the extra boost so it was to no avail. JW
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