No secondary air pump mate. Still got all the aircon intact. I could loose 20kg off me just as easily as I could the car.
Dave. Thats quick. I once logged a 5.3 on ihi, but it was normally low 6's. You could get a bit more boost in there dave. Nowt wrong with maxing out the map sensor, as long as you have a boost guage, and make sure boost doesn't start to creep up (if your maf sensor goes), you should be fine.
The risk you take is if the maf starts to under read, and the map is maxed or close to it, the timing is already at the end of the tables, and won't be reduced as the ecu won't see that you have more boost.
If you have a boost guage you'll see it happen, hopefully before anything goes pop. You could always fit a 2 bar sensor from a 150pd and run with some map sensor headroom, and safety.
Chasing timing is well worth it. If you can run more boost and maintain good timing, it's all good.
But remember if your wmi fails, it can be really bad if you're maxing out your timing.
I set mine up to give 3-6's in 6th on a long pull with wmi, which sees 6-9's if I turn it off, so the ecu's knock control has some room left to manoeuvre.
If you're setting it up for 3-6's in 3rd and 4th you'll see a few 9's in 6th, so if your wmi fails, you're in trouble. A little bit of safety is worth the tiny loss of power. It can get mighty expensive if it goes wrong.
