Boost/Vac. Gauge

[Paul Clark]

I've never seen one, so don't know how they read both boost and vac. on just one gauge.
My boost gauge is suspect, so I'm in the market for a new one.
Should I get one that also (somehow) reads vac.?
Also, could I use the same hard line and light wiring I now have? I've got my current gauge in an A-pillar mount. Could I just pop it out and replace it, or will it all have to be redone?
Thanks

 

[Notplayn]

It reads vac at idle and boost during acceleration. I installed my knock and vac/boost gauge today. :biggrin:

 

[Paul Clark]

Which one did you get?

 

[onefastcar]

In mine i have a spots comp autometer 2 1/16 boost/vacuum gauge reads to 30 in of vacuum to 30 pounds of boost good to see if you have vacuum leaks, at idle i'm at 18 in of vacuum.

 

[Gary Wells]

I've never seen one, so don't know how they read both boost and vac. on just one gauge. My boost gauge is suspect, so I'm in the market for a new one. Should I get one that also (somehow) reads vac.?
Also, could I use the same hard line and light wiring I now have? I've got my current gauge in an A-pillar mount. Could I just pop it out and replace it, or will it all have to be redone? Thanks

------------------------
If you go to the Autometer website, they have pics.

 

[pacecarta]

boost = positve pressure
vac = negative pressure
a running engine pulls vacuum to operate , (-psi) but they scale it to read In/HG
your turbo provides pressure under boost (+ psi)
as you pass 0psi you are in boost , below that you are in vac

a vac /boost gauge just reads positive and negetave pressure

the auto meter sport comp 30 in hg /30 psi gauge is nice

 

[rodman99999]

Yes- you can use the same hook-up as before. The brand won't matter as they all function on the same principles. If your's is acting up: you might want to be certain there are no kinks in the tubing going to the vacuum/boost source.

 

[my1stgn]

This is the cheapiest place Ive seen Autometers go for!

http://www.egauges.com/vdo_grou.asp?Series=Phantom&Cart=2

 

[Paul Clark]

Is this a good one?
http://www.egauges.com/vdo_ind.asp?Type=Turbo_Boost&Series=Phantom&PN=ATM-5703

 

[pacecarta]

if you like white face , yes

the autometer sportcomp looks more like the stock analog dash

 

[Paul Clark]

So, spend my money.
I've got some I haven't even borrowed yet.
How does this one stack up?
http://www.egauges.com/vdo_ind.asp?Type=Turbo_Boost&Series=Sport_Comp&PN=ATM-3308

 

[pacecarta]

funny you should bring that one up , i have the sport comp 30/30 and just saw on summit the one you have there , http://store.summitracing.com/partd...822101+4294908420+4294792988+115&autoview=sku

i recently found my gauge reading past 30 , how far im not sure

without alky and good knowledge of your tune and equipment I doubt you would ever need a a guage over 30psi and if it did go that far what it was would be the least of your worries .

cant go wrong with autometer but i would buy from summit , then there will never be a problem if the gauge doesnt meet your expectations or goes bad .

 

[Gary Wells]

Might be easier to read a 30-30 gage, and if your motor ever sees over 30 lbs of boost, the gage might survive the motor explosion, but I doubt it.
Just my opinion.

 

[my1stgn]

Ive bought all my gauges from egauges.com and never had a problem. I run the Phantom gauges in both my 00 Grand PRix GTP and the 87 GN. So I could recommend them unless you find it cheaper elsewhere. But Summit is good too!