Boost Gauges

[agent006]

Afternoon,

I'm after a boost gauge for my S4. It's running 3bar at the moment, and i'm finding it near impossible to find anything that will measure more than 3 bar of boost (would be nice to see if there are any rogue fluctuations over 3bar). Plenty of 2.5 a few 3 and one 4 bar, but that's from Stack so costs a fortune.

Anyone got any pointers?

[matt_fp]

Are you sure its running 3bar of boost? The WRC cars ran less than that!

Or is it 3bar absolute i.e 2bar over Atmos which is a bit more reasonable.

Matt

[agent006]

matt_fp said:

Or is it 3bar absolute i.e 2bar over Atmos which is a bit more reasonable.

Probably, assuming the following statement means something to you:

"Anyhting under 1 bar is considered to be vacuum"

Which would suggest that i only need a 2 or 2.5 bar absolute gauge?

[NiceCupOfTea]

That sounds about right - mine shows negative boost.

I reckon this should do the job, fitted the 1.5 bar version in mine and it's a nice piece of kit!



Speaking of which, Matt, did you get my email?

>> Edited by NiceCupOfTea on Wednesday 24th August 17:29

[Matt_FP]

agent006 said:

matt_fp said: Or is it 3bar absolute i.e 2bar over Atmos which is a bit more reasonable. Probably, assuming the following statement means something to you: "Anyhting under 1 bar is considered to be vacuum" Which would suggest that i only need a 2 or 2.5 bar absolute gauge?

Yep, thats not off the factory digital gauge is it? It shows the Map Sensor output hence why it shows 1bar as effectively zero.

1 bar is atmospheric pressure. So anything you stick on top of the that is x pressure + 1 bar to give you absolute.

In short you only need a 2 bar gauge, or 2.5 bar - Racetech do a very nice 2.5 bar gauge which is around £35.

HTH

NCofT - yep I'm just shite at replying to my mail Will get one over to you tonight.

Matt

[love machine]

I reckon industry gauges are the way to go, there are many makes. I have a beauty from an aircon unit which reads +2.5 bar>-30 in Hg. They are often reasonably priced as well as looking the part. Automotive specific ones are over priced.

I think VDO do an industrial gauge line, they also do not appear cheap, like a lot of the VDO range, they are re-calibratable, servicable and something you can take to bits yourself. I had one of those a while ago from an expanded polystyrene unit. Oil filled and everything. Nice.

[agent006]

Matt_FP said:

Yep, thats not off the factory digital gauge is it? It shows the Map Sensor output hence why it shows 1bar as effectively zero.

It is indeed. With a 3 bar map sensor, so i'm getting tired of multiplying readings by 1.2 in my head.

[matt_fp]

Go here:

www.raceparts.co.uk/racetech/instruments.htm

Buy This:



Job Done

Matt