Anyone Hobbs Switch 0-2psi p/n & source?
Thread Starter
TECH Fanatic
Joined: Nov 2001
Posts: 1,986
Likes: 1
From: Centrifugal City
Originally Posted by cablebandit
i got mine on ebay
eBay link: http://cgi.ebay.com/ebaymotors/ws/eB...me=rvi%3A1%3A1
Any known vendors I can pick a specific opening pressure switch? Found a link to a 5psi Hobbs switch at Summit, but would like something that engages at a lower boost level.
Trying to decipher page 4 & 5 on this doc:
http://content.honeywell.com/sensin...bscorp/P3_6.pdf
Do I want p/n 78629 or 78633?
What is N.O. vs. N.C. ?
P.S. A Hobbs switch is a boost/vacuum activated switch.
Last edited by MelloYellow; Nov 7, 2004 at 01:33 AM.
Thread Starter
TECH Fanatic
Joined: Nov 2001
Posts: 1,986
Likes: 1
From: Centrifugal City
Found one thru Vortech for around $20.
Vortech P/N 8D002-001.
It's a 2psi Hobbs Boost Pressure Switch normally used on a '93 F250 Vortech Kit.
Due to engine compartment temps I prefer a metal style which should be good to 250*.
It's manufactured by Thomas Faria, but you can't purchase directly (Qty 100+)
http://www.faria-instruments.com/hea...eavyduty5.html
Thomas Faria Notes:
P/N PS4039
2psi +/- .5psi
1/8 NPT Male
Normally Open, Closes at 2psi+.
Has 2 screw terminals, Use ring terminals on wire.
Vortech F250 Manual Reference:
http://www.vortechsuperchargers.com/...fc4fe218im.pdf
Vortech P/N 8D002-001.
It's a 2psi Hobbs Boost Pressure Switch normally used on a '93 F250 Vortech Kit.
Due to engine compartment temps I prefer a metal style which should be good to 250*.
It's manufactured by Thomas Faria, but you can't purchase directly (Qty 100+)
http://www.faria-instruments.com/hea...eavyduty5.html
Thomas Faria Notes:
P/N PS4039
2psi +/- .5psi
1/8 NPT Male
Normally Open, Closes at 2psi+.
Has 2 screw terminals, Use ring terminals on wire.
Vortech F250 Manual Reference:
http://www.vortechsuperchargers.com/...fc4fe218im.pdf
Last edited by MelloYellow; Nov 9, 2004 at 01:50 PM.
