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Old 04-17-2008, 10:41 AM
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Oil Pressure cutoff switch - no room?

First time on this topic here.

I am installing a new electric fuel pump and I wanted to include an oil pressure cutoff switch by using this plumbing tree (see pic below) and put the oil pressure sender above the cutoff switch.

HOWEVER, after removing the Coil and getting a better look at it, I realize that the sender is directly under the distributor and doesn't provide me with enuff room to install the tree and tighten the "many" fittings properly. (see pic below).

My question is this: is there any other way to accomplish the fuel cutoff other than using the oil pressure cutoff switch? Or is there another way of plumbing this and still use both the sender and the cutoff???

Please keep your replies in "novice terms" because I'm not very knowledgeable about these things.

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Old 04-17-2008, 11:49 AM
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Perhaps there is a port above the oil filter.
Big Block chevies have the ports there and in the front of the motor.
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Old 04-17-2008, 11:59 AM
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Thanks, Bryan, however, it's a little old sbc.
have a good'un
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Old 04-17-2008, 12:01 PM
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You could use a vacuum switch instead.
JA
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Old 04-17-2008, 12:11 PM
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Hi,
Your pics didn't show for me (normal)
But I used a 45*fitting to get away from
the dist. 1" of pipe & a 45*, then your other stuff.
Good luck,
Rich
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Old 04-17-2008, 12:24 PM
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You could use the fitting at the front of the motor instead....there should be a similar tap above the timing cover on the front of the motor.
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Old 04-17-2008, 12:25 PM
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Quote:
Originally Posted by richard stewart 3rd
Hi,
Your pics didn't show for me (normal)
But I used a 45*fitting to get away from
the dist. 1" of pipe & a 45*, then your other stuff.
Good luck,
Rich
thanks, Rich, I may have to do that but if I do it will mean 8 separate fitting connections instead of the already 6 just on that one application and that means 8 more places to leak - - and my middle name is "leak" - LOL

Hey, Johnnya, PLEZ tell me more about the vacum switch,
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Old 04-17-2008, 12:39 PM
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Or you could use an impact cutoff like is sold by Ron Francis. It doesn't cutoff the fuel when the engine dies, but it DOES cutoff the fuel if you are in an accident. The switch Francis sells is actually a Ford switch, and can be scavenged at the wrecker out of any number of vehicles. If you post in the electrical forum, I'd bet someone could point you straight toward it.

Pat
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Old 04-17-2008, 01:01 PM
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Hi,
I didn't know you had so much stuff on there,
in that case, I would make a manifold (like an
old fuel block for multiple carbs) & mount
it on the firewall & run a flex line to it.
I'd like to know more about the vacuum switch
as well, sounds a lot easier.
Rich
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Old 04-17-2008, 01:27 PM
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There is an 1/8 pipe plug just above the timing cover, a little to the pass side. You can remove that and install your pressure switch. Or the one down by the oil filter too. Either will work. Messin with all that stuff back by the dist is a real pain.
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Old 04-17-2008, 02:07 PM
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First of all thanks for the replies and secondly - - I cannot find/SEE? any plugs around the timing cover or oil filter on this 350 small block chevy motor. That doesn't mean they aren't there but if I can't see them then they aren't convenient - - - LOL

Please understand that y'all are trying to help a "One eyed fat man" - - well, not exactly but I do have "True Grit"
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Old 04-17-2008, 02:51 PM
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...SO help another "old guy" out, this oil pressure cutout switch does WHAT to the electric fuel pump?
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Old 04-17-2008, 03:07 PM
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Quote:
Originally Posted by 11echo
...SO help another "old guy" out, this oil pressure cutout switch does WHAT to the electric fuel pump?
well, if I could have gotten it installed, it shuts the electric fuel pump off in case of an accident to where the driver couldn't just turn off the key (unconscious - ETC?)

Last edited by wretched ratchet; 04-17-2008 at 03:34 PM.
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Old 04-17-2008, 03:20 PM
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Here is the port I mentioned. I'm using mine to feed my Frantz toilet paper bypass filter.



Mark
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Old 04-17-2008, 03:33 PM
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Quote:
Originally Posted by Jmark
Here is the port I mentioned. I'm using mine to feed my Frantz toilet paper bypass filter. Mark
I wish, Mark, but the only thing up front on mine is the sender for the temp gauge - - - dang-it
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