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turbo boost gauge

u63af

u63af

New member
Hi ended up buying a 1990 turbo as discussed in previous posts. It is red (so obviously the fastest[:D]). The factory boost gauge is going up to 2 bar on the gauge but i def does not feel like 2 bar. I am hoping that it is just the old gauge and have ordered a new after market gauge. Hopefully it will sit at about 12 psi.

Has anyone else had probs with standard gauge?

Cheers
Sandy
 
Well the standard gauge is not what you'd call accurate, which is why most of us who have turned the boost up at all, tend to fit a decent aftermarket one. As standard the 250 model like yours should hit 0.85 bar of positive pressure. Mine runs to the far end of the standard gauge and that's running 16psi.
 
The factory boost gauge shows absolute pressure. Above 1 bar, the turbo is on boost, i.e. for a stock car the gauge should read a maximum of around 1.8 bar absolute pressure, or .8 bar of boost. It is difficult to read the standard gauges accurately though.
 
Great, that makes sense. I think it is prob about 1.8 bar. Ordered a new gauge as I will chip and raise boost soon. Cheers
 
Whats the best Guage to get and where from? Ebay has lots and lots of them. Is it best to get one in BAR or PSI?
 
Just get one you like the look of. Bar or PSI depends entirely on your preference for the scale, both are linear so it's easy enough to convert between the 2 should you need to. I'd expect they are all accurate enough given that they display via a needle swinging over a scale. I bought a VDO 0-30PSI gauge for mine as it was in my personal preferred scale, had a black face with white numbers and a red needle - just like the standard instruments. Coincidentally they are VDO also though that had no bearing on my choice. Arguably 30PSI is too much but I think the next one down was 0-15PSI which is too little for much over standard boost. Another brand might do 0-20PSI or 0-25PSI which would be a better range. Last thing to consider is if you want one that reads below zero (vacuum) as well as you can get that type also. There are mechanical and electric types, but most people I think fit mechanical as it's easy (just run a tube from the manifold) and I think there are two connection types; metric and imperial. That doesn't matter too much as you just get a fitting to suit.
 
I bought a VDO one from Promax - it keeps quite a stock appearance to the dash. Make sure you get a psi one rather than a bar one - you really need the smaller increments of the psi gauge to easily see the reading IMHO.
 
ORIGINAL: Fen Arguably 30PSI is too much
Click to expand...
I think a 30psi scale will be too much for most people and it means the scale is much closer together so harder to read accurately. I have an Autometer that reads to 20psi boost and 20Hg of vacumn However I just read Patricks latest post on Rennlist and his new 3.0L build is all but finished and plans to run 40psi on E85 fuel [:eek:]. He'll be needing a very big boost gauge [;)]
 
I really like the look of STACK gauges [link=http://www.demon-tweeks.co.uk/products/ProductDetail.asp?cls=MSPORT&pcode=STAST3111]SEE HERE[/link]
 
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