Hi there

This is my first post - so go easy.
I've had my UK MY99 turbo for less than 2 months -having a great time.

I fitted a HKS boost guage and it was reading 0.9/1.0 bar on WOT in 4th & 5th (i.e. standard) - which I thought was fine.

At the weekend I fitted a dawes device and now the boost reads 1.1 in WOT in 4th & 5th - and I'm really happy.

The thing is I was at a rolling road at the weekend (Star in Fife in Scotland) and they stated my boost was 0.8 bar and that I could increase it to 1.0 safely.

What should I believe the HKS guage or Star RR?
Any thoughts?

Cheers
Kenny

 

I think it must be a loads thing, or the fact that when your car is moving it is been cooled down 'ALOT' more than the poxy fans used at RR sessions, this must have some effect on cooling the intercooler, turbo, coolant and flow of air over or to the air filter e.t.c..???

I had the same thing... on the road my boost gauge reads 14 psi, but on the rolling road my boost gauge only read 11psi.

Dan

 

100% ditto Dans comments.

Boost is controlled by Load - (Obviously - Throttle Position & Revs have input into this too)... But at the the end of the day if there's not enough load it won't boost to its full potential.

Most rolling roads work on the Force = Mass x Acceleratin thing.

The Force is calcultaed based upon the known mass/weight of the rollers & how quickly the car can accelerate on them.

Just one of those things - RR does not equate to real driving conditions.

Chris

 

Cheers guys.

 

Kenny your car sounds fine. Whilst there are ways of running more your car was running to spec and running artificially low at Star as they all do, and you are now running it sensibly on the Dawes.

The run length at Star is far too long compared to the road and this badly heatsoaks a car. A properly tuned road car will often also det on the rollers, and they never seem to run the boost they run on the road.

[Edited by john banks - 4/16/2003 10:29:58 PM]