Z32 AFM and Injector Duty

[Steve]

Hi, just put on a Z afm, solved the problem with the old afm, but now my injector duty has risen from 77.0% to 87.9%.

Is this cause for concern?

Is this because I haven't re dynoed it yet and its running rich?

Any ideas?

Cheers

Steve

[macka]

Sounds like it may need remapping again..

Just whack it on the dyno again and check..

Jingies 87% and thats just on your standard Turbo!!

I wonder what mine is!

PS I think i need one of them Brake strengtheners that u have what do u think?

[Steve]

G'day Macka,

Absolutely correct, I do need to get up on the dyno again.

Apparantly (according to SDU forum member), when you select VG30 AFM on the power fc, it automatically adjusts the fueling to be a bit on the rich side, but not as bad as the stock ecu, to make sure nothing runs too lean. It is easily fixed with a dyno, which is being done on Friday next week. I will be getting it done at Tilbrooks in SA as I am moving there this Sunday - hopefully get some good results. Just have to go a bit easy until then and I know the full story.

I think it may be a good idea to have yours checked, esp if you are pushing your car (which you say you have done just on occasion..hehehe). Apparently ???? when the duty gets too high you can run into trouble with the accelerator enrichment when you plant the foot, even if your duty cycle is less than 100%, which is why it is recommended to start thinking about an adjustable fuel pressure reg and injectors and fuel pump when you start getting over 80-85%, and why I was starting to get a bit worried

I wouldnt be surprised if your car is on the limits, or maybe have occasion to go over them as you have a much higher rwhp figure than mine and your running a bigger turbo. Might even be worth while getting your AFM sorted at the same time? Would help get deeper into the 12s:)

The main reason I went for a master cylinder brace is because my previous ride had alot firmer brake feel, and it just annoyed the hell out of me after a while. I dont think they are a bad idea, if you have access to a welder, it wouldnt be hard to make one up yourself - even mass produce for the lads on here and keep costs down for yourself? Would be cheaper than the $100 + postage that UAS charge.