Nistune Forums

That IC piping looks very nicely done - those welds!! A couple of questions: what kind of changes to tune are required to make it work in blow through mode? What injectors - brand and impedance? I was a bit worried about fuelling of 800cc injectors at idle - at low pulse widths on small engines like...

If you mean flames from exhaust on deceleration, I actually like how it looks to be honest

But I guess you should really reduce amounts of injected fuel in high rev/low load area, i.e. the leftmost column of the fuel map

Excellent work Chris! You describe two methods of using stock solenoid. What method do you consider to be better? Using boost stability, spike resistance, fade resistance, boost repeatability on different throttle positions as a criteria? I would like to know your thoughts on this and if you add the...

Interesting. Thanks for info. I need no do some field testing

setting TP limit helped with the boost cut? What kind of boost control, if any, are you using, may I ask? In our case setting tp limits to 254 did not help - boost cut, which looks like it's being triggered by pressure, was still there, started at 14-15psi

Hi Petros, I'm not sure if the RB25's go batch fired up top. The only ones I've seen do it are the CA18's. On the bench there's a distinct chnage in the sound the injectors make. I can only assume that it's so they can get good resolution at low load and then they fire the injectors twice as often ...

Maybe it should beep or something when AFR is being adjusted and/or when target AFR is reached?

I'll leave that one for Matt but it may have to do with how CA's go from sequential to batch fired injection at a certain RPM/load. PL Does RB25 neo do the same? Why cant it remain sequental at high rpm? As for standard turbo - we have done some dyno pulls on my mate's R34 GT-t, turbo has stock com...

Maybe some kind of EBC can help with boost stability then. Even better if it would be factory boost control, but lack of time is a definite issue. The most impressive thing with this turbo and your joint effort with Pete is that although the GT3071 makes boost later than stock one, motor actually pr...

There is a method to change boost cut level, at least one that I know of. I did not do a lot of experiments with it, crashed my car, but as far as I know, the situation is as follows (if someone has more accurate/complete data, please post here and correct me): Stock boost sensor, the one that is lo...

Hi, Matt! Nice result with your R34, although boost pressure is still falling closer to the end of rev range. What kind of boost control is installed? I see a jump in AFR and power graphs in 5200-5600 interval. Have you adjusted stock valve timing (i mean VTC switch point)? If so, have you noticed a...

Tuning a Z31 for a customer of mine with the Nistune Type 1 board. I was able to hookup to the computer and comm. with no problems. However to run in open loop I decided to unplug the factory oxygen sensor. When doing this I noticed that someone had let the factory plug lay on the cast iron of the ...

Just experimented with this stuff offline. When you commit change it changes K constant but does not change your load scales. I really think you should adjust them. Note how your K behaves when you rescale for higher capacity injectors - it gets smaller to represent the fact that for the same load y...

wait - Z32 maf. Is it setup properly? Maybe load scales are wrong for such a highflow maf? Or something like this?

Ignition problems somewhere? Coils, plugs?