[DML] Re: roundabout question

[William T Wilson <fluffy@xxxx>]

On Mon, 6 Sep 1999, BRUCE BENSON wrote:

> This statement isn't quite right and needs to be clarified. Actually a
> blow off valve is something used in the CART racing series cars. It
> limits turbo boost to the CART rules by opening, or blowing off, when
> a CART driver dials his boost higher than allowed by the CART rules.

What you are probably thinking of is a pop-off valve, which is different
from a blow-off valve. Sometimes a blow-off valve is called a bypass
valve, which I think is a better name for it because it doesn't really
blow off.

A pop-off valve is present on some high-boost cars as a safety feature for
preventing excess pressure from developing. It isn't needed on the
DeLorean because none of the DeLorean turbo kits generate enough boost to
need that sort of safety feature.

For more information on blow-off valves, see:
http://jhunix.hcf.jhu.edu/~rlg1/Preliminary.htm
or
http://www.retrosportusa.com/catalog/bp&bov/bp&bov.htm

> Our DeLorean turbos have what's called wastegates. These divert the

I agree with your description of the wastegates.