Gauge

iTrader: (3)

Hey all,

What part do I need to put an AutoMeter fuel pressure sensor on the Shrader valve on the end of the stock fuel rail? Let me know if you need additional information in order to answer this. Thanks in advance!


Tony

koolaid_kid

iTrader: (21)

If you just want to connect straight to it, you could use this:
http://store.promustangperformance.com/atm-3280.html

I used a T-fitting so I would still have access to the port under the hood, but I can't find it now. If I manage to find the link, I will post it.

red83

iTrader: (64)

i used a -4an (i think) female w/ 2 1/8" npt ports fitting

red83

iTrader: (64)

here you go

http://www.nitrousoutlet.com/catalog...roduct_id=2717

thats what i used, except i got the 2-port

Gauge

iTrader: (3)

So, just to clarify, I need a female 1/8" NPT fitting to go on the Shrader valve? (And, then, whatever the sensor requires on other side of the adapter, of course)

red83

iTrader: (64)

your autometer male fitting is 1/8 npt. the end of the rail is -4

........-4 female w/ female 1/8" npt port(s)

and you will also need a -4 cap if the fitting you buy has a male -4 on the end of it like the one in the link

or you can use the other one in the link and use a 1/8" npt union

Gauge

iTrader: (3)

Thanks, guys. I really appreciate the info.

Gauge

iTrader: (3)

Time to resurrect this thread. I bought the part that red83 linked (2 port version) from Nitro Dave. I got a cap and a plug (not realizing it came with one), and I've put it together with some teflon tape. Sure enough, it fits on the Shrader valve and the sensor, and all is well...

Except... is there anything there to hold the Shrader valve open? Doesn't look like it. Do I need to pull the pin out of the Shrader valve so that it's always open?

red83

iTrader: (64)

yes, pull the valve out w/ a valve stem tool for tires. it will be the one w/ 2 slots in it.

it needs to be open

red83

iTrader: (64)

one more thing. just in case you dont know. do not put teflon tape on the an fittings. only on the npt fittings

Gauge

iTrader: (3)

Why not on the AN fittings specifically? I was really doubting that I should in the first place (because I was afraid it would get in the fuel), but my father was in construction for 40 years, so I was taught to always use teflon tape.

12secSS

iTrader: (30)

The AN fittings have a taperred seat that seals against the mating flange/port, so the threads are not part of the seal design. NPT fittings are taperred and the threads are part of the seal design, hence why you need to add teflon tape to the threads of NPT. Using teflon tape on the AN fittings will not do a thing, won't harm it nor will it help. You just run the risk of part of the teflon tape going into the fitting and causing a plug. I used to design all sorts of fittings for aerospace companies, so I know about this and this is why they do not allow teflon tape on the AN fittings (too many lives at stake).

red83

iTrader: (64)

what he said. it is a machined fit on the an fittings. if you look real close at npt fittings you can see the taper. that is also why they never tighten all the way down like a bolt

Gauge

iTrader: (3)

Thanks, guys. I really appreciate you taking the time to cure my ignorance. It's such a simple thing, yet I would have never figured this out myself.

Spd-Kilz

iTrader: (35)

And I thank you for asking the question.

I had the same thing on my mind, but now it all makes sense