So I bought an equus boost gauge and it asks for me to use a compression sleeve ( see photo.) however, in a tutorial I saw (https://www.rx7club.com/3rd-generation-specific-1993-2002-16/boost-gauge-install-noobs-defi-gauge-install-847158/)
He just connected hose to gauge with no sleeve. Could I do the same?

 

i used the sleeve on my glowshift gauge. Why would you not wanna use it?

 

You need them to connect the nylon tube to a brass nozzle which then connects to a rubber/silicon tube that can then fit on the UIM fitting. Just follow the directions

 

Because the plastic tubing doesn't want to stay very nicely in the gauge hole, but ill just seal it with something

 

thats what the sleeve is for. when you tighten the nut, it clamps down on the hose...

 

Doesn't clamp down hard enough

 

youre the first person to ever have a problem with this system.

 

Does anyone have an answer to my original question? cause the nylon tubing just falls out. Do I need the sleeve to get an accurate reading or no?

 

did you use the nylon tubing that came with the kit?

 

Yes. It stays clamped down until even the slightest of pressure is put against it and it falls out.

 

To answer your question, you need it to keep the tube from falling out.

did you tighten it enough?

 

I don't think you are seeing my question..I bought a vacuum hose that can connect from the intake to the guage. Can I just use that? Or I do I need the sleeve to create more pressure for a more accurate reading?

 

should probably be fine.

 

I can't get to the tutorial u linked via the rx7club app so no idea how what you are following to install. You were asked if you were using the nylon tubing supplied with the kit in which you said yes but then also say that you are connecting it via a hose. Which one is it? If using the nylon tube, then you need the compressions sleeve as that's what holds it in place and seals it. I'd you're just using a hose, then no, you don't need it.

 

The vacuum line is fine. That tubing is garbage.

 

i just used silicone vacuum hose all the way. No issues. I used 4mm tubing and shoved it on the threads.

 

I used kindve big tubing not realizing I could've used an adaptor.. I used like 7mm tubing, but adapted it toward the end with a smaller tube and brass little thingy hopefully increasing pressure to give a better reading.

 

My nylon tubing worked fine

 

As did mine.

The nylon tubing fits thru smaller holes, so it's easier to route thru the firewall. In addition, it wont collapse like a hose might if squeezed a little bit.

 

Its not garbage because it doesn't work. It's garbage because it gets brittle and can give gauges inaccurate readings. I had an issue with boost readings when the car was warmed up and it turned out the tubing had a hole and got soft when the car was hot and opened up.

 

Man you guys should see whats been on my car for the last four years...

Nylon line goes from gauge in cabin, out to the intake manifold.

Piece of offcut rats nest rubber vacuum hose stuck on an unused manifold nipple.

Nylon line is poked into that rubber hose with fingers, that's all.

No clamps, no nothing to keep the line on the intake manifold. Thought it would pop off under boost in the first week. but the stupid thing has stayed put for over four years and still gives good accurate boost readings...



I look at the brass fittings and stuff up there in the diagram, and look at my simple nylon poked into a bit of rubber vacuum line... And it cracks me up that mine is so simple and still hangs on

 

But to answer your original question, that sleeve is also called an 'olive' and slides over the nylon tube. When you tighten the fitting for the final time, the sleeve or 'olive' is supposed to crush into the nylon tube and grip it hard.
The nylon tube then will not pull out of the fitting.

Then when you disassemble the fitting in a few years time, you must cut off the section of nylon with the sleeve or 'olive' squashed onto the nylon- it cannot be reused again.

That is the correct way that pictured system is engineered to work.

 

My old DSM was like that, but i popped out once in a while