The factual bit:
I spent many hours down at Star Performance yesterday…12 hours in fact (08:45-20:45) having a play…testing a few things, having a load of work done, trying out a few things etc.
Firstly, thanks to Jim & Brian…12 hours and two meals later we were all knackered!
Credit where it’s due…anyone looking for decent service, advice and standard of work could do a lot worse than giving them a shout.
Secondly, none of this was free…labour rates, wheel alignment rates, dyno time, replacement parts…all paid for out of my pocket...I have the invoice for over Ł900 to prove it!!
Thirdly, these are our (mine, Jim’s and Brian’s) observations based upon our findings. All testing carried out with conditions kept as close to previous conditions as possible etc…some will disagree violently, some will agree…that’s your prerogative.
So, off we go:
Dead simple this one...swap the standard boost control solenoid valve (N75) for one off another model.
I've previously tried the 'H' valve...great on the road but gives 'soft limp' all the time on my car.
This time the 'J' valve...can't compare the results obtained last year with the standard vs 'H' testing for obvuous reasons - different day, different fuel, many parameters.
So, 'J' vs Standard.
Easy...over the runs we did (several) the results are thus:
You get 8BHP @ wheels and 20 lb-ft of torque out of the 'J' N75. Brilliant!
I've not proved if *I* can actually run the 'J' valve on the road yet without hitting limp mode...but it works.
And at about Ł30 from VAG parts...it's cheap.
The N75 adds about 0.2 bar of boost on my car...hence the 20 lb-ft increase. But it now means I'm running up at just under 1.9 bar peak boost! Scary!
Standard N75 average yesterday was 196 BHP @ wheels and 310 lb-ft.
'J' N75 average yesterday was 204 BHP @ wheels and 330+ lb-ft.
forgive me for not posting the dyno graphs...I can't be arsed at the mo...I have them here...I'll maybe get round for it later on.