Backfire/overboost valve

Get the most out of your Engine / Gearbox with these handy hints ...
Post Reply
User avatar
BRUMBERTY
Junior Member
Posts: 656
Joined: Tue Oct 04, 2005 10:00 am
Location: Cranbrook, Tasmania

Backfire/overboost valve

Post by BRUMBERTY » Thu Dec 15, 2005 11:04 am

Howdy all,
to protect the supercharger rotors and airbox in my new intake system I am going to need a huge dump valve or flap.
When and if it backfires the overpressurised gas needs to be vented.

Any ideas on where i would get something like that??
anyone got an old diesel turbo with a big wastegate I can use?

Lateral thinking and improvisation is encouaged here.

I am thinking of running 6-8psi as operating pressure, so this would need to vent at 10 or 12 psi.

Cheeers.
Matt
1989 Subaru WonderBrumby II
EJ22 Dual range AWD lifted, widened and much happier now thanks very much.

1991 L Series wagon, white and perfectly normal apart from the ticking, no I think that is normal.

Jet boat..webbered EA81 with a hybrid tin dish welded and glued to it.

User avatar
Ben
Junior Member
Posts: 853
Joined: Tue Oct 04, 2005 10:00 am
Location: Coffs Harbour, North Coast NSW

Post by Ben » Thu Dec 15, 2005 11:59 am

The manifold of early Nissan turbo motors (inc RB30 skyline motors) has a 12psi dump valve to protect against overboost. Looks like a blow off valve without the manifold vacuum hose.

Please watch before posting!


http://www.albinoblacksheep.com/flash/posting

Image

User avatar
BRUMBERTY
Junior Member
Posts: 656
Joined: Tue Oct 04, 2005 10:00 am
Location: Cranbrook, Tasmania

Post by BRUMBERTY » Thu Dec 15, 2005 12:02 pm

Perfect, Cheers Ben.
I will look into one of them.
1989 Subaru WonderBrumby II
EJ22 Dual range AWD lifted, widened and much happier now thanks very much.

1991 L Series wagon, white and perfectly normal apart from the ticking, no I think that is normal.

Jet boat..webbered EA81 with a hybrid tin dish welded and glued to it.

Post Reply

Return to “Engine, Gearbox and Diff”