I think your barking up the wrong tree mate..

Hope Im wrong for your sake...

^^^ You're probably right mate but it's pretty much the last hardware thing I can rule out that was swapped on the car. Pulling them out myself has cost me nothing so worth a shot. If this doesn't fix it then you'd be pretty confident it must be in the tune. At this point, I'd be happy with that.

ID1000's MattyP.

Ah great injector that

All back in and running but...nup :( The were down by about 5% apparently and a bit dirty. Seems to have improved start up but that's it unfortunately. Loaded the tune back in also but no difference.

I've done all I can do now so time for a retune I think. I will beat it in the end. It's personal now. Bahaha.

Id's are such a good injector but still people bugger them up when scaling them !

So weird. Car sat for a couple of hours and I just got back from the shops. On the way home, I gave it a hit again and it tore the tyres off and revved out clean and strong. Now that I've re-flashed it (even though it didn't seem to work first up) maybe it might come good. It's just so damn frustrating to be soo close to getting it spot on. The 'A' version is awesome. I was keen to get the tune looked at before Sunday's track play but my tuner is booked up. Hopefully, I won't hurt anything. Car isn't pinging or misfiring. I do have my iridium plugs so I could put them in again but I think I'm wasting my time.

I had a rough idle on some mornings, but was not always there.

One day I asked Rob to have a look at it and he had it in overnight.

Did a run in the morning with no issues on the dyno. Changed the scaling and I haven't looked back since......

Nitto Invo's rule!!!!

Well, the BKR6EIX's back in have gotten rid of 99% of it and most importantly, revs clean at WOT. Just slightly there at like 50% throttle input.

Will be fine for the track day now and in a month or so I'll get it back in and we'll do the P100 tune and clean the 98 up a smidge.

Bring on the chopping

Been a while. I was planning to play with the actuator alignment next week to get it 100% and check preload. However, I'm aware of another car being tuned at the moment with an MTA750 that had to run a stiffer actuator to stop the gate blowing open too early and get some consistency in control.

The common theme seems to be you need to run an actuator very close to desired boost with this turbo. Interestingly, the PT6235 is supplied with a 15psi actuator.

I'm convinced my boost control issues are mechanical. It's not major - the car is 95% right. Given the other car was doing near identical things, I'm going to swap the 12 out for a 15 or 17 and tweak the tune to suit.

I'm not the only one that shares the view the rear wheel generates more pressure in these turbos. The 900 even more so. Unless the port job is up to scratch and you run a stiff actuator, there are enough examples getting around now to show you'll most likely have issues. A 12psi spring to run 16psi won't get it done.

Anyway, here's hoping getting the actuator aligned and tracking 100%, plus upping the spring, will get rid of this annoying boost pulse.