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Jstrag360
02-20-2012, 04:23 PM
Another noob question here. I just order an oil pressure gauge and no way will i trust that nylon hose with hot oil in the cab. Trying to save a little money so instead of buying Autometer's braided ss hose kit, I'm gonna make my own. My question is, is the fitting on the gauge a -4AN? And is this the correct hose end, http://www.summitracing.com/parts/SUM-220490B/ ? Then do I run a T off the the factory sender, and what size is that? Thanks for any help.

KicknAsphlt
02-20-2012, 05:34 PM
Why didn't you just order an electronic o/p gauge...? Then all you'd need to run into the cab are wires... *shrug*

Jstrag360
02-20-2012, 05:51 PM
Not worth 200 to me lol, at least at the moment.

grapejuice1998
02-20-2012, 06:12 PM
There's nothing wrong with running the little plastic hose. People have been running them for 60+ years with no problem.

Jstrag360
02-20-2012, 06:16 PM
Well I could probably piece together a kit for like 25, just as a safety precaution. Have you ever heard of them breaking?

tcuillier
02-20-2012, 07:57 PM
There's nothing wrong with running the little plastic hose. People have been running them for 60+ years with no problem.

All 4 of my Autometer gauges are mechanical. Oil pressure, Water Temp, Vacuum, Tranny Temp. All have been in my R/T since 2001, including the Oil Temp with plastic hose. No problems at all.

grapejuice1998
02-20-2012, 10:38 PM
Well I could probably piece together a kit for like 25, just as a safety precaution. Have you ever heard of them breaking?

No. Never.

tcuillier
02-20-2012, 11:09 PM
I also had mechanical gauges in my '77 chev and in my '39 Chev. coupe. Oil pressure gauges had plastic / nylon tubing into the passenger compartment. Never had a leak, ever.
I was hassled by an NHRA official, just one time, that suggested the tubing be replaced with metal tubing.
I've never heard of anyone having a problem with the plastic tubing to an oil pressure gauge.

blackknight
02-20-2012, 11:15 PM
the only thing is you will not be allowed to race with a plastic hose, atleast not at a nhra sanctioned track, not here anyway!

ScojoDak
02-21-2012, 12:41 AM
My old man didn't want to run a plastic line so he rigged up a copper line with a nut/ferrule fitting. Food for thought.

Jstrag360
02-21-2012, 01:27 AM
Quick question about pressure. The nylon hoses are 1/8". Would a 1/4" hose lessen the pressure reading?

wyotech_cuda440
02-21-2012, 01:38 AM
Quick question about pressure. The nylon hoses are 1/8". Would a 1/4" hose lessen the pressure reading?

Nope. PSI is the same regardless of the volume.

BTW, I'm pretty sure I have a Stewart Warner fuel pressure isolator sitting around. Its 1/8" NPT on one end, and the little plastic hose hooks to the other end to send the reading to your gauge. BUT, if the plastic hose ever breaks, it wont let fuel through. They're required on mechanical fuel pressure gauges mounted in the cab to prevent fuel from getting through the firewall. It would work the exact same for oil pressure.

I'll look around tomorrow, if I can find it, and its rated for the right pressure, it will be for sale for cheap :biggthumpup:

Jstrag360
02-21-2012, 01:41 AM
Cool thanks:biggthumpup:. Alright ill think about that, lmk.

AmberFireDaK
02-22-2012, 12:50 AM
the only thing is you will not be allowed to race with a plastic hose, atleast not at a nhra sanctioned track, not here anyway!

I'm pretty sure NHRA doesn't allow it anywhere... but unless your running in a class event I doubt anyone would see it or say anything

wyotech_cuda440
02-22-2012, 01:23 AM
Cool thanks:biggthumpup:. Alright ill think about that, lmk.

OK, I found it. It's actually an Autometer gauge isolator, pn 5280. It was just installed on a Stewart Warner gauge.

Autometer replaced it with pn 5282, but looks the exact same as the 5280 that I have.

The 5282 costs like $110, I'd sell you mine for $20 shipped. (I dont have the braided hose, just the isolator itself) It's rated for 200psi working pressure, 300psi max.

The bad news: you have to fill the gauge, plastic line, and the gauge side of the isolator with antifreeze to make it work accurately. The instructions are on autometers site (listed under the 5282 isolator) but its kind of a PITA.

If you're willing to fill the lines with glycol, it is a NHRA approved gauge isolator that pretty much guarantees that you won't get oil (or fuel if it's on a fuel pressure gauge) in the cab if the plastic hose breaks.

blackknight
02-22-2012, 01:42 AM
I'm pretty sure NHRA doesn't allow it anywhere... but unless your running in a class event I doubt anyone would see it or say anything

they will here, they want to know the color of your underwears!