sweet99ss

iTrader: (41)

Anybody know of a place that sells vacuum operated cutouts? Can't seem to find them anywhere... One on ebay for $600 LOL

Cajun ELESS-ONE

something like this?

sweet99ss

iTrader: (41)

Yes only I'm looking for one that will open by engine vacuum... I can't seem to find one..

2000PewterT/A

I don't think they make one that opens by engine vacuum, hopefully I am wrong because I think that would be a cool concept

pearsonmx6

A c6 z06 uses a type of vacuum cut out.

red04montels

iTrader: (1)

It's based upon RPMs and is electronic.

pearsonmx6

Yeah a eletronic solenoid controls the vacuum like most vacuum controld out puts.

jimmyblue

iTrader: (11)

I've been working (lackadaisically) on various cutout
schemes, haven't gotten to the vacuum scheme other
than acquiring a big box of vacuum actuators.

It seems like a decent scheme other than that some
regions of operation are likely to partially-open the
butterfly (like where mid-throttle low RPM drops
vacuum to below the counter-spring force). And it
is uncommon to find a biscuit with a lot of stroke
length, short ones mean a short arm and a weak
holding force -> rattling plate.

So far my efforts make me prefer a solenoid-closed,
spring-opened scheme. But I also kind of like the
idea of a pressure operated biscuit, that takes the
exhaust gas pressure off something like the EGR or
AIR fittings (I know there is significant pressure at
the head of the Y, because I've blown out O2 sensors
at WOT) and the pressure-biscuit would be working
off exactly what it's meant to mitigate.

Solenoid-open, spring-closed in my experience is
too weak to not rattle, closing strength being set
by the wrong end of both spring closing force and
solenoid pull-in force.

The Alchemist

iTrader: (19)

Why would you open it with vacuum and not boost? You want it closed at idle/low rpms, but once you hit boost, you want it to open.