Stick a fork in it… I’m done!…

Following on from ‘another milestone for the S3’ I recently changed the turbo’s compressor housing (right) to an anti surge one (left)…

Stick a fork in it... I'm done!...

Stick a fork in it... I'm done!...

Below is a log where you can clearly see where the surge affects charge pressure and fuelling…
Stick a fork in it... I'm done!...

With no map change the surge has now gone…
Stick a fork in it... I'm done!...

So obviously I can now turn up the boost 🙂

The pre-antisurge boost map…
Stick a fork in it... I'm done!...

…and the post antisurge boost map…
Stick a fork in it... I'm done!...

Quite a bit different… its noticeable too… the noise of the turbo has changed a little but banging up through the gears with ALS turned on it just hits so hard and pulls like a train…

Managed to get the car onto the dyno to validate the change…

Orange plot is previous map and non ported housing
Blue plot is previous map on ported housing
Red plot is the tweaked map on the ported housing
Stick a fork in it... I'm done!...

Stick a fork in it... I'm done!...

Antisurge housing did (as expected) make the response a little laggier but I may be able to mitigate that with a little fine tweaking… who knows…

So… what does this mean? basically it marks the end of what I can do tuning wise on my car in its current setup… I have pretty much got as much power as is practical out of the hardware I have…

In fairness… just under 620bhp and 440ftlbs of torque is more than is really necessary on the road… while the old girl may not handle like a £200k super car she is fast enough to make the owners think that their investment is broken 😉

I will however still be playing and tweaking… more to try and get the spool a little quicker if possible… there is a new firmware release for the Ignitron ECU coming soon too… this will include cruise control (yesssss!) amongst other things and means I still get to play with the car a bit.

Next ‘big’ thing though will be a full respray… the body work is pretty clean for a car her age but… she has had some poorly executed repairs done in the past which are now showing through… including a really bad windscreen replacement which has lead to the drivers A pillar bubbling up under the paint… not happy about that at all to be honest but hopefully it will all be sorted…

One last thing before I wrap up… I bought a cheap Windows 10 based tablet to allow me to run the Ignitron software on int he car and use the ‘tablet mode’ which allows you to design interfaces with gauges…

Stick a fork in it... I'm done!...

It plugs into the Ignitron USB interface using an OTG adaptor and I secured it using a pair of magnetic phone holders…
Stick a fork in it... I'm done!...

Have to say it works well…

<tuffty/>

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