Search found 426 matches

by RomChip200
Sat Apr 30, 2022 12:23 am
Forum: General Nistune Discussion
Topic: VG30DETT warm crank issues after injectors swap
Replies: 9
Views: 4129

Re: VG30DETT warm crank issues after injectors swap

IDAPro disassembly. I move the ass routines I mod in different memory location (0xE000) to have extra space and then, patch all the jsr calls. Then, I recompile in assembler and update 0xE000-0xEA00 area. On top, here is the modelling of inj_compute_cold routine in C: icc_P7.c P7 gives a avalanche e...
by RomChip200
Fri Apr 22, 2022 6:01 am
Forum: Type 2
Topic: Crank, startup, AS_ENRICH, engine dies, cold
Replies: 9
Views: 5334

Re: Crank, startup, AS_ENRICH, engine dies, cold

The previous 12 holes 750-840cc injectors.
1650566800519.jpg
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1650566800500.jpg
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by RomChip200
Fri Apr 22, 2022 3:10 am
Forum: Type 2
Topic: Crank, startup, AS_ENRICH, engine dies, cold
Replies: 9
Views: 5334

Re: Crank, startup, AS_ENRICH, engine dies, cold

These 675cc injectors require a latency as low as 600us to keep the idle in the 192-range (aka 0) for the fuel map, and a smooth transition from TP=8 (fuel correction factor=5) to TP=112 (fuel correction factor=44). All of this for a given Injector conversion factor: 200 in my case (i.e. 200/255) wi...
by RomChip200
Thu Apr 21, 2022 8:51 am
Forum: General Nistune Discussion
Topic: VG30DETT warm crank issues after injectors swap
Replies: 9
Views: 4129

Re: VG30DETT warm crank issues after injectors swap

Solved (injectors swap): https://forum.nistune.com/viewtopic.php?f=8&t=3908&p=28662#p28662 As I digged a lot into the crank injection routine, I modded it deeply to be able to output injection values with decimal, not only integer (too much rough with big injectors). Example: Before (OEM): P...
by RomChip200
Thu Apr 21, 2022 8:38 am
Forum: Type 2
Topic: Crank, startup, AS_ENRICH, engine dies, cold
Replies: 9
Views: 5334

Re: Crank, startup, AS_ENRICH, engine dies, cold

Good crank shape.
675cc_crank_53°C.jpg
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by RomChip200
Thu Apr 21, 2022 8:29 am
Forum: Type 2
Topic: Crank, startup, AS_ENRICH, engine dies, cold
Replies: 9
Views: 5334

Re: Crank, startup, AS_ENRICH, engine dies, cold

I changed again my injectors and solved all my issues of hot cranking. My previous were chinese yellow 12 holes, pretty good on all the range, except cranking when playing with 2-3ms. I suspect the 12 holes drip more than they spray when the crank pulse is short. I just tested them on my bench (shou...
by RomChip200
Sat Apr 09, 2022 1:28 am
Forum: Type 2
Topic: Crank, startup, AS_ENRICH, engine dies, cold
Replies: 9
Views: 5334

Re: Crank, startup, AS_ENRICH, engine dies, cold

I want to avoid this injection bump on startup too:
Startup_inj_bump.jpg
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by RomChip200
Sat Apr 09, 2022 12:21 am
Forum: Type 2
Topic: Crank, startup, AS_ENRICH, engine dies, cold
Replies: 9
Views: 5334

Re: Crank, startup, AS_ENRICH, engine dies, cold

My injectors are Chinese 740cc injectors. Stop sarcasms :P , they are pretty decent value. My previous DW 740cc were 370cc redrilled that static flow only 600cc !! DW is making money ... My Chinese injectors really flow 740 or 750 or 800, 12 spray tiny holes (laser) I don't really care once the tune...
by RomChip200
Fri Apr 08, 2022 11:06 pm
Forum: Type 2
Topic: Low RPM, low/high TP area concerns
Replies: 3
Views: 1548

It is not at all on deceleration, it is acceleration when escaping from a full stop and I concentrate on 400-1200 rpm range. You cannot reach these area on deceleration with MT, especially on speed, except if you put to neutral when driving, which is not normal driving conditions ! The same for dece...
by RomChip200
Fri Apr 08, 2022 12:12 am
Forum: Type 2
Topic: Low RPM, low/high TP area concerns
Replies: 3
Views: 1548

Low RPM, low/high TP area concerns

I have philosophical concerns about the following areas: 1, 2, 3, 4 ,5 1) When are they solicited (which driving conditions) ? 2) What are the target AFR for each area ? Is an area supposed to be leaner than other ? a) I reach area 1 when gently exercising throttle to start from a full stop b) I rea...
by RomChip200
Thu Apr 07, 2022 11:48 pm
Forum: Type 2
Topic: Crank, startup, AS_ENRICH, engine dies, cold
Replies: 9
Views: 5334

Crank, startup, AS_ENRICH, engine dies, cold

I have this issue sometimes on colds startups (11°C, car stayed parked for 2 days), usually below 10°C. My enrichment tables are very low according to my 750-850cc injectors. 18 18 15 13 11 9 7 5 3 2 1 1 0 0 0 0 After_start enrich: 100 90 80 70 60 50 40 25 15 10 6 4 4 4 4 4 (anything lower causes pr...
by RomChip200
Mon Apr 04, 2022 11:05 pm
Forum: Software Enhancements
Topic: Higher contrast colours for trace ...
Replies: 7
Views: 4506

Re: Higher contrast colours for trace ...

Waiting for this feature asap :-)
by RomChip200
Sat Apr 02, 2022 3:27 am
Forum: Type 2
Topic: Goes lean once it reaches operating temp, car dies.
Replies: 2
Views: 1815

Re: Goes lean once it reaches operating temp, car dies.

Log rpm, temp, inj. ms, O2 long/short trims, TP, timing.
by RomChip200
Sat Apr 02, 2022 3:16 am
Forum: Type 2
Topic: Very rich idle hack
Replies: 5
Views: 3150

Re: Very rich idle hack

You have low latency, 620us.
Raise the latency value e.g. 900-1000us and you can smooth out the fuel map for low TP.

What is your fuel vs. max. boost ? You have big timing advance.
by RomChip200
Sat Apr 02, 2022 3:10 am
Forum: Software Enhancements
Topic: Possible to use nistune with no laptop
Replies: 4
Views: 2503

Re: Possible to use nistune with no laptop

Hum, go for a wIn10 tablet (e.g. Chuwi ones).
Celeron N5100.