Boost gauge readings

[shnazzle]

What are normal boost gauge reading all around?
Not sure whether my gauge works well or not. Idle vacuum seems to fluctuate buy never drops below 11, which seems low.
But I do hit peaks of 16/17 when under max load so that makes sense.
What should I be expecting from the LCR?

 

[Karl db]

Sounds about right to me

 

[shnazzle]

Sounds about right to me

Cool.
Should vacuum at idle be more around - 20?

 

[tchallenger]

My lcr idle vacuum is 20 on deceleration 25 and on standard map peak 14/15

 

[shnazzle]

Yeah the adapter wasn't on right. Get vacuum of 22ish now and boost of 16. Gauge is very responsive now. All good.

 

[monk3y303]

Where have you T Into just fitted mine and it idles at 25 hg and when boost goes back to zero ??

 

[shnazzle]

I got the APR tap. So straight off the inlet mani pressure. (mk2)
Idle should be at about 20-25.
When you let go of the throttle it should shoot down a bit lower than idle but climb back a bit. It just depends how much the throttle plate is open. If you're cruising with 10% throttle or something you may be at 0 or 5inHg.
Boost on mk1 is probably about 13 or so?

 

[monk3y303]

Mines drops bellow 0 off the scale lol and idles around 25 . Shouldnt it be the other way round lol

 

[shnazzle]

Eh? What do you mean? Idle 25 is still OK. Strong vacuum there.
More throttle you give, the more the needle goes up

 

[monk3y303]

The needle is goin down past zero as I increase throttle

 

[shnazzle]

Oh... That's a bit odd haha. Prob don't have it hooked up right. Any pics? Also of the gauge

 

[monk3y303]

Qell its just one hose into the fpr and then 2 wires for the light but ill get pics if u want . Was expecting it to sat at 0 when idle and when throttle increase the needle goes up but working backwards lol

 

[monk3y303]

This is idle

 

[shnazzle]

Thought so... That's a vacuum gauge mate. So yes, the more you hit the throttle, the less vacuum you will pull. If you have a turbo... You want to get a boost gauge. That shows vacuum and boost.

 

[shnazzle]

Probably not very good for your gauge actually as it's designed more for naturally aspirated cars.

 

[monk3y303]

Ahh ryt what a tool I am went thru all that effort of fitting it and its wrong haha

 

[shnazzle]

Hahaha. It's alright mate. We all make mistakes. Good news is you're pulling good vacuum at idle which is a good sign.
If you replace this gauge with a boost gauge I can buy this one off you

 

[monk3y303]

Well not all gone to waste then lol ill be gettin a new gauge at end of month only problem is not guna match my other gauge now as there both the same ha

 

[shnazzle]

Shouldn't be a prob. Good chance the same maker makes a boost gauge. If your current one is electric, get another electric one. If the boost tube goes straight to the gauge, you only need to switch the gauge. Easy peasy

 

[monk3y303]

Its mechanical still an easy swap tho dunno rhe make tho just says pro on front cnt find it any where lol