Howdy guys.

 

Just something I noticed that I have been unable to clarify.

 

Q1.

 

The turbo gauge on my car, ya know, the standard one, mine says -7 and +7, but I have seen pics of some cars with -14 and +14.

 

Were there two models released, one maxin out at 7psi and the other 14psi :eek:

 

Q2.

 

Whats the psi boost limit on a standard Twin Turbo, and what can they be turned up to safely ? as I heard that for every 1psi its worth 10bhp :)

 

Hope someone can clarify this for me.

 

Thanks.

 

Matt :)

The difference is between UK spec cars and Jap spec crs.

 

Standard boost is around 9.5 psi, boost increase without a chip change absolute max is 11 psi with a chip 14.5 psi but use super unleaded.

 

Daveman

Thanks Daveman :)

 

Mines a JDM and says -7 +7, I would have thought the JDM would have had the bigger number boost setting ?

 

If I can only get 1.5psi extra without chip then I best wait until I can afford to do that :)

 

Thanks mate.

 

Matt :)

The -7 +7 is in a different scale to the UK -14 +14 it actually represents the same boost level, not exact but if you double the figure on your gauge it is the same as psi on a UK model, or maybe at some time fit a UK gauge.

 

The power increase with out a chip give a bit more response and was very popular several years ago, in fact a particular tuner in the south use to do this and charges a lot of £££££ as well.

 

Daveman