Boost Guage/Vaccum Questions

[Ledheavy]

Couldn't find any info on this. I just hooked up a boost gauge to my Sr20det :2f2f: & I'm wondering what the "normal" vacuum level should be when idling & when running under boost. Thanks!

[rastaman]

I think @-15 at idleing and what ever boost level you are set to when full boost

[cotbu]

18inhg-20inhg.
if you have cams it can be lower 15ingh to 18inhg. larger cams lower vacuum. Idle 850rpm

Sent from a Highly Tuned Note 4.5!!!

[Ledheavy]

Thanks! Seems to be right about 18-20inhg. Still learning & wanted to make sure this was OK.

[Kingtal0n]

What I usually do is run a vacuum line to the driver seat, and put it in my mouth while I drive. So I can feel how much vacuum/boost the engine makes.

When you start to boost, it flies out of your mouth...
:D

actually I do have a line there, but its for sipping distilled water.
back to work...

[Ledheavy]

Ok, so this is a real silly question, but I cannot seem to get the nylon hose to seal, it appears to just sit in place. I followed all the instructions that came with it. I'm using the equus boost guage for reference, anyone with any experience working with compression fittings? Im about to glue the damn thing into place lol

[rastaman]

Hose clamp it?

[Kingtal0n]

what do you mean seal? seal to what. Either the nylon is pinched upon with the tiny brass compression fitting deal. Or you slide it into a vacuum line and zip tie it ghetto fashion.

[cotbu]

For the nylon hose and brass fitting type.
Slide the hose through the compression nut, place the compression fitting on the hose, install the hose into the gauge, you have to slightly crush the brass fitting against the hose by tightening the nut.
Just don't over tighten it.

Sent from a Highly Tuned Note 4.5!!!

[Ledheavy]

Thanks cotbu, crushing the brass fitting makes sense, I ended up putting the nylon through the brass coupler, then i used a small piece of electrical tape on the edge of the nylon before the small brass fitting, then tightened down. The electrical tape prevents the nylon hose from coming out of the brass coupler & it has sealed perfectly. Ghetto I know but it works!