Boost Gauge Problem

[Magoo]

Fitted an Autometer boost gauge and wired it up.

But when I start the engine the gauge reads -20. I took the original dash boost gauge pipe off ( near brake master cylinder) and fitted the pipe there.

The pipe is a little lose and I wondered if that had something to do with an incorrect reading?

[s12Rob]

i think -20 is normal for vucum but dont hold me to it, where the hose goes onto the guage it that tight

[sideways danny]

18-20 inHg of vacuum is healthy

[Magoo]

when the car is being driven will I then see what boost it is kicking.

Its standard at the moment waiting for my T5 intercooler etc to be fitted.

Is standard around 6-7psi?

[s12Rob]

yes std is about that mark, once u have your ic fitted you may see 8 but then wind up up to 12psi and have some fun, have yo had air filter and exhaust yet?

if not they should be your next mod, the std exhaust is so restritive

[bigtim]

you will have to get rid of the standard safety valve before you wind the boost up though

[datdrift]

or you can just put a cable tie or two over the safety valve

[s12Rob]

why do that when a blanking plug will cost about 3 quid from b&q. you know its safe then, if your turn it up before you fit the ic, dont turn it up past 10psi. i learnt that lesson by melting a piston

[Magoo]

Will heed your advice and buy a blanking plug and wind up to 10psi.

Got K+N on just need the exhaust sorting.

Does anyone have one for sale or know of a good way to sort rear box. All ones on eBay seem too short and would need lengthening slightly.

[s12Rob]

goto your local powerflow place and get a 2.5" straight through system with a can on the end