ER34 RB25DET NEO tuning questions

[winmasta]

Fault codes in the Display - Consult vehicle display

Those spikes are your MAF reading reverse airflow (reversion)

This is a common issue and it means that you need to point your BOV vent back away from the AFM and towards the turbo (at an angle)

1) fault codes are in "ECU Messages" window ?
2) i didnt completely understand about BOV (Blow Off Valve i think) but i have hks ssqv installed (see attached image)





3) what about wrong timing (last picture in my previous post) ?
4) and one more strange thing, on full throttle before the end of race TP falls to 21 while maf and trottle position is high (see attached image)

[winmasta]

guys pls need help ))

[Matt]

1. Yes fault codes in ECU messages window. CONSULT_DTC_OK if everything good

2. BOV that you are using is atmosphere venting. We recommend plumped back BOV which has a hose going out back into the turbo intake (away from MAF)

3. Timing not sure about. Do you have knock sensor fault code? What are the values on your knock map (25 on this map, what about knock map?)

4. Looks like boost cut. Increase TP limit table, disable TCS (on your dash) and make sure boost sensor is connected properly. Also there are new added boost cut parameters which you can increase in 0.10.1 version thanks to Toshi

[winmasta]

1. Yes fault codes in ECU messages window. CONSULT_DTC_OK if everything good

2. BOV that you are using is atmosphere venting. We recommend plumped back BOV which has a hose going out back into the turbo intake (away from MAF)

3. Timing not sure about. Do you have knock sensor fault code? What are the values on your knock map (25 on this map, what about knock map?)

4. Looks like boost cut. Increase TP limit table, disable TCS (on your dash) and make sure boost sensor is connected properly. Also there are new added boost cut parameters which you can increase in 0.10.1 version thanks to Toshi

1. There is no fault codes, i am happy ))
2. i should use stock BOV (with stock piping) ? or i can leave this one but mount it to stock pipe or i should mount new pipe to intake, Matt, tell me how do you solve this problem ? i think my BOV dont affect those rich moments i talked about, am i right or not ?
3. There is no fault codes, knock map is the same (copied) as main timing map (i am carefully watching for these)
4. i will increase TP limit table (but values are high enough i thought) TCS always disabled, will check out boost sensor (by the way why we cant log in nistune boost from native boost sensor ?) and will make some road tests. New boost parameters - how do they work ? where i can read smth about it

thanks for helping )))))))

[winmasta]

help help

[winmasta]

hi again, now - injectors
here is my NISMO ( ??? cc) injector





here is my STOCK injector





here is they together







they looks same even the injecting holes

here is VIDEO with injectors

[Matt]

2. Suggest using stock BOV and route into the inlet piping going into the turbo to avoid the rich spikes on decel
3. Will need to have another look
4. TP table should be about the same as what I provided in my tune

Cant log boost from native sensor since TP overrides the registers for this parameter

New boost parameters havent been documented yet. Dont worry about it at this time

[winmasta]

2. Suggest using stock BOV and route into the inlet piping going into the turbo to avoid the rich spikes on decel
3. Will need to have another look
4. TP table should be about the same as what I provided in my tune

Cant log boost from native sensor since TP overrides the registers for this parameter

New boost parameters havent been documented yet. Dont worry about it at this time

2. i'll try ssqv into the inlet piping (there is such opportunity)
3. take a look pls
4. all values 255 (it means no boost cut at all) in manual you do not reccomend removing boost cut at all BUT i will do it

it is done for now, on this weekend i will try to boost up to 1 bar and will make some road tests, make logs and post here

thanks ))

[winmasta]

hey Matt, what about my "injector trouble" (i have posted some pics and video for recognizing injectors) and what about new boost cuts soft and hard where can i read smth about ?

[Matt]

I've had a look at the pics but cant find a part number for these. These are same as mine
http://www.nissansilvia.com/forums/inde ... pic=398294

It appears they should be 480CC

- Ignition timing is only 1 degree off the interpolated cells so not too worried about that
- When TPS released is then TP drops in the log before the AFM drops so this triggers that drop

Looking at your tune files the injection multiplier appears to be incorrect

Attached is standard ER34 with auto adjustments Z32 MAF, 480CC => Injection multiplier = 459

Yours is 580 from both tunes

My tune ended up having 500 as the injection multiplier

[winmasta]

I've had a look at the pics but cant find a part number for these. These are same as mine
http://www.nissansilvia.com/forums/inde ... pic=398294

It appears they should be 480CC

- Ignition timing is only 1 degree off the interpolated cells so not too worried about that
- When TPS released is then TP drops in the log before the AFM drops so this triggers that drop

Looking at your tune files the injection multiplier appears to be incorrect

Attached is standard ER34 with auto adjustments Z32 MAF, 480CC => Injection multiplier = 459

Yours is 580 from both tunes

My tune ended up having 500 as the injection multiplier

i'll try again to change kconst and will make a video if it won't work properly

[winmasta]

Matt, i see that my tune hardly differs from yours your fuel map is richer and timing is less, if it is ok with my tune, if it is safe, or may be your tune is for some special purpose, my tune is for normal street using and racing some time ?

one more try change injectors WATCH

[Matt]

I watched your video just then

So you did the Z32 first which went from factory 348 to 580 and it ran fine, but when then leaning it out doing injector resize 380CC->480CC it went to 459 and ran too lean

Not sure why that is too lean but I've got mine around the 500 mark with the same setup, how does yours run on 500

My tune is just for those mods with 17psi boost. It was the most timing it could take before detonation

[winmasta]

I watched your video just then

So you did the Z32 first which went from factory 348 to 580 and it ran fine, but when then leaning it out doing injector resize 380CC->480CC it went to 459 and ran too lean

Not sure why that is too lean but I've got mine around the 500 mark with the same setup, how does yours run on 500

My tune is just for those mods with 17psi boost. It was the most timing it could take before detonation

at 500 - runs lean, 580 is REALLY good running, i broke my head already about injectors

about fuel and ign timing - as i understood you have ER34 RB25DET NEO like me, so the question is why your timing is twice less than my ? (we can detecting knocks only by ears from the car so i don't know if there is but i suppose that if they was my engine broked for a month ago) about fuel map - what afr target is optimum, on some forums (and in nissan ecu tunung basics) they say near 12:1, your fuel is 10:1 on maximum boost, so i really cant understand what is the optimum, my target bosst is 17-20 psi, don,t want to loose my engine so what do you think what afr and timing are really safe for me (use 98 gasoline) and i wonder what are your results in 0-402 m and 0-100 km/h if you made measurements and HP also ?

thanks for support ))

[Matt]

about fuel and ign timing - as i understood you have ER34 RB25DET NEO like me, so the question is why your timing is twice less than my ?

I'm running 17psi of boost in 98 octane here and we are using knock microphone to detect detonation you could not possibly hear from the drivers seat

what afr target is optimum, on some forums (and in nissan ecu tunung basics) they say near 12:1, your fuel is 10:1 on maximum boost, so i really cant understand what is the optimum

My fuel is not 10:1 have a look here
viewtopic.php?f=2&t=950
My R34 is in there showing the end pipe AFRs. The figures in the fuel map are indicative only we used the filtered values when runing and watch the wideband. You should do the same...

You should be aiming for 12:1 on the wideband and get some knock sensing headphones/device fast... you may be detonating and not knowing it...

Havent done time trials etc ... too much boost and cant keep the car straight