Nistune Forums

I've just been trying to sort my car backfiring on coast down, I think you have solved it! Vacuum opening the BOV. Now is there a better feed to activate the BOV than the original Pipework?

Same issue here, VEMS wideband showing correct AFR but not on the datalog.

Hi, This might be of interest to you all - my friends car is over fuelling. It has been mapped by a reputable chap and was until recently running spot on 12AFR when on WOT. Boost pressure is either 1.2 BAR (low) and 1.4 (high). Summary - 12AFR before, nice :D 10.5 AFR after, not nice :( We have used...

|Hope its ok I add a comment on this thread....my idle setup is really troubling me With o2 off (shift + O) on the fuel map, and all cells set to 0 I try to change the K value till the afr is around 14.7. This is sometimes ok. however on after about 15 seconds it will lope a little and afr will rise...

The head has been machined, valves and seats reprofiled too so it flows better...I had mapped it but didn't bother to play with K value much so now I have done that my tune isn't much good - remapping next week should sort that out. Off boost is very nice though, torquey and responsive as. Better th...

Perfect, I will try that as I'm just running off what my actuator is letting me have (15PSI) but it creeps and I want it to hold a steeady 20PSI Will let you know what I find - fyi it is a HKS GT-RS (very similar if not nearly identical to 2871 :)) running 740's and 256 cams and a z32 MAF Reporting ...

That is a good way to do it yes....I;ve seen over 25PSI like this on a similar turbo to chris, so should be fine in that area Not sure I've made myself clear, that diagram you posted up chris. The Block method - does it involve your custom adjustable restrictor (I wasn't referring to the stock ones,...

Nice write up, just a little confused on the diagram for Block method - there is mention of the restrictor but the diagram shows simply intake and the stock solenoid with only 2 feeds from it.

i use excel to do this to speed thing up

Any chance you can post up the pic of the table and map/ values you used, for comparison Pete? I still haven't got it quite working as I want.

That is fantastic Pete, I will get out and play with this tomorrow, let you know how succesful I am too.

Update - without the brass restrictor in the pipe from the T peice to the solenoid, the boost comes in VERY early, which is lovely for torque, but spikes and soars way above 10PSI, in higher rev ranges almost 17PSI. It is uncontrollable in this fashion, so I will replace the restrictor, and perhaps ...

Talking of jet sizes, I've just removed the brass restrictor in the hose from the solenoid to the T connector. I haven't touched anything else, and upon my journeying tomorrow I will report any effect it has. The standard solenoid duty maps look like they are running at approximately 57% capactiy at...

I've just been out for an hour trying to get the stock solenoid to respond with adjustments to the High boost duty, Boost Loads scale and Boost RPM scale. Can you (pete? :)) clarify exactly what these 3 do, so I know I'm in the right area - I tried to make it easy for me to see changes by changing a...