Which boost guage is right?

[68442]

Glowshift guage shows about 23 idle, stewart warner 16. With a mighty vac glowshift appears to be pretty close to a little high, warner low. I suspect the stewart warner is way low, 23 vacuum at idle about right?

 

[RamenPride]

my bet is on the Stewart Warner gauge giving the correct reading

 

[2GRick]

my bet is on the Stewart Warner gauge giving the correct reading

Glow shift is junk. I put in a Autometer and it's dead accurate. Should read about 18 in. Make sure all your connections are solid.

 

[68442]

I found a 3rd guage laying around, it follows the mighty vac pretty close also. Appears the warner is 10 high and low. Trash I guess .

 

[Blackjet18t]

Should read from 17-21 at idle and on decel around 23. Ive had SW before and they are great gauges so my bet would be it is correct.

 

[car46999]

+1 for SW, they have been making gauges a lot longer then the Glowshit have been around.

 

[68442]

I'll buy a new autometer and compare before I throw any away. Thanks!

 

[daren_p]

I'll buy a new autometer and compare before I throw any away. Thanks!

Who says Autometer's read correct? I've ran 3 or 4 Autometer's over the years & none of them read exactly correct. Best was +/- 1psi but have also had them 4-5psi off (& from new as well). Like most automotive gauges, they are over priced junk.

I've had best luck with electronic (sender unit vs mechanical) automotive gauges but they do run a great deal more vs a mechanical gauge.

 

[drunkin_idiot]

Autometer is junk IMO. Defi has always had solid readings.

 

[RamenPride]

My car's been sitting for a little more than a year, and somehow it has managed to produce vacuum w/no engine. At least that's what the Autometer Sport-Comp boost gauge is saying..... I had a sport-comp boost gauge before this one that I had to replace because it went bad also.

 

[68442]

Just a quick update, 3rd and new guage reads like the others. Just got a bum one I suspect.

 

[SteGerHPI]

Glowshift's are awful. I sent mine back to be recalibrated 3 times before I finally just told them to keep it. SW's are pretty good for the money, I like them better than Autometer. In/vac should be 12-15ish. 23 would be collapsing hoses. I recommend dynotunenitrous.com for guages. They're made from a nice hunk of billet aluminum, they're digital which takes out the guess work when you're wide open in 3rd and 4th, and they come with a medical grade pressure transducer so they're super accurate.

 

[talon1616]

autometer is the best. There really accurate. Im getting megan racing though. they should be pretty good for price

 

[97gst_707]

I have a glowshift and its at 19 vac at idle for mines, iono if that helps ### iono ### it suppose to be at anyways....