420A Oil feed location

[LD25Delta9]

I'm trying to clean up some plumbing on the back of my block because I have a stupid amount of adapters and fittings ran for my oil pressure gauge, oil feed and oil sending unit. There is a bolt that looks like it can be removed about 6 inches to the right of the oil sending unit's spot and I was wondering if I can use that for my oil pressure gauge or for my sending unit? If it's a random hole for coolant that's plugged up, nevermind, but I would like to be able to clean up some of the mess. Any insight?

 

[rstare]

I know this doesn't really help, or answer your question (I think it's for coolant, though) but, why do you need the stock sending unit if you have an actual pressure gauge, now?

 

[LD25Delta9]

I still have the stock ecu and I guess I haven't really looked into whether or not the ECU reads it....topic change?

 

[96TurboGS]

To make sure this thread isn't wasted....

This is how I use to have mine – I had 2 T female fittings that were 3/8 (NPT) all the way around, they were connected by a 3/8 male to male connector. Then I had a 1/8 to 3/8 adapter at the top of one T for my AEM gauge sensor. I then plugged my stock sending unit into the top of the other T as it's a 3/8 thread. One side of the first T went into the block while the other had a 3/8 to -3an fitting for the oil feed to the turbo. Because there isn't much clearance when extending the connectors I used several 3/8 connectors connected to a 90* fitting which made a oil supply rail in parallel with the block. The whole assembly was around 80 bucks, not including the plumbing to or at the turbo. It can get very expensive if using the catalog from jegs/summit for all these little parts. To save you some headaches, make sure you use white tape or the permatex thread sealant.

Only thing i need now is a oil pressure gauge at the turbo.

 

[VelocitàPaola]

The stock oil pressure sending unit is only connected to the indicator light in the gauge cluster; it's not required by the ECU whatsoever. I would remove it.

I have a steel 45* elbow/3/8" NPT to -4 AN adapter at the stock OPSU location, followed by a 6" section of -4 AN line. Next comes a specialty -4 AN to 1/8" NPT to -4 AN tee. My Autometer oil pressure gauge's sending unit is attached to the 1/8" NPT side of this tee, and an inline oil filter from Earl's is attached to the other -4 AN side. Finally, a 24" section of -4 AN line connects this assembly to the turbocharger.

You should not use any sort of joint compound for Teflon tape on the AN fittings. Teflon actually isn't rated for use with any petroleum based substance, and AN fittings were specifically designed to work without any sealant. I would, however, advise using a little anaerobic sealant on any NPT joints.

 

[bullettdsm]

The stock oil pressure sending unit is only connected to the indicator light in the gauge cluster; it's not required by the ECU whatsoever. I would remove it.

Oddly, I would advise you to keep it.

I actually still have it on both race cars. Why? Because it is great back up to see this emergency red light on your dash. You are not always looking at the oil pressure gauge, so its great to have.

The only time I really look at my gauge, is when I'm watching for warm up and checking free rev.

MB

 

[VelocitàPaola]

The only time I really look at my gauge, is when I'm watching for warm up and checking free rev.

I check my oil pressure gauge far more often than that... probably because I don't have the OPSU anymore!

 

[LD25Delta9]

Good to know. I'm starting some prelim aluminum fab and had the exact same idea as you Paul, but I'm goin to keep my OPSU, like Mark, and mine will be all custom, fancy-like for my bay...Thanks for the response guys. As always, it is appreciated. Hopefully Mike gets me my intake soon so I can post some new pics.

 

[Natedsmeclipse]

I'm trying to clean up some plumbing on the back of my block because I have a stupid amount of adapters and fittings ran for my oil pressure gauge, oil feed and oil sending unit. There is a bolt that looks like it can be removed about 6 inches to the right of the oil sending unit's spot and I was wondering if I can use that for my oil pressure gauge or for my sending unit? If it's a random hole for coolant that's plugged up, nevermind, but I would like to be able to clean up some of the mess. Any insight?

that plug you are talking about is coolant. but if you keep going to the right there is another plug that is oil pressure. i use that for my oil feed it right under the calender if you need a pic let me know.

 

[Natedsmeclipse]

right under the 4th cylinder

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[LD25Delta9]

That's the normal feed location....also that's cylinder number 1. It's firing order from the front of the engine is like this: 2341

I thought you were talking about a second one, further to the right (from the back of the block) I've got it all figured out though....Thanks guys.

And you should get rid of that fram piece of junk.....get a NAPA gold. They are one of the cheapest you can buy and also have an efficiency rating of 99 point something-or-other.