Search found 86 matches

by unex
Thu May 27, 2021 10:54 pm
Forum: Type 3/4/5
Topic: How aggressive is the GTiR timing table?
Replies: 5
Views: 2969

Re: How aggressive is the GTiR timing table?

need some work with timing, but I would say its much better now
by unex
Thu May 27, 2021 8:29 am
Forum: Type 3/4/5
Topic: How aggressive is the GTiR timing table?
Replies: 5
Views: 2969

Re: How aggressive is the GTiR timing table?

my advice is not related with your question, but still: 1. Fix load resolution. You dont need half table with same ignition timing. Better use more resolution on high load. 2. Nissan ecu is not good at fast throttle transition (in terms of ignition timing), so I recommend lowering low load timing, b...
by unex
Sun Mar 21, 2021 2:26 am
Forum: Type 3/4/5
Topic: New Injectors 740cc problems
Replies: 9
Views: 2765

Re: New Injectors 740cc problems

at first set fuelling at WOT 4th gear. After that adjust injection latency to get good idle afr
by unex
Tue Oct 06, 2020 7:47 pm
Forum: Type 1
Topic: N62 MAF Mapping
Replies: 4
Views: 2157

Re: N62 MAF Mapping

Increase injector latency, decrease K.
Read some nistune tuning basics.
by unex
Thu Jul 23, 2020 1:17 am
Forum: Type 3/4/5
Topic: Issue out of nowhere: SR20DET bogging above 0.5bar boost
Replies: 11
Views: 6796

Re: Issue out of nowhere: SR20DET bogging above 0.5bar boost

try different boost gauge. I guess you have overboost.
by unex
Thu Apr 09, 2020 8:35 pm
Forum: Type 3/4/5
Topic: Help diagnosing SR20 engine failure [Tune, Log, Pics]
Replies: 11
Views: 10167

Re: Help diagnosing SR20 engine failure [Tune, Log, Pics]

I did not looked at log, but: 1. it was knocking hard; 2. too much advance in mid range; 3. does your CAS was set in proper position? Checked with strobe light? Because if not, it makes things even worse; 4. never do tuning without external knock detection system, unless you are sure that ecu is pre...
by unex
Wed Sep 11, 2019 8:04 am
Forum: Type 3/4/5
Topic: Increasing Boost - the best way to handle TP
Replies: 7
Views: 2047

Re: Increasing Boost - the best way to handle TP

in short: rescale K so that at max boost you hit somewhere 100-120. Rescale fuel and ign maps to get more resolution on high load, and lower resoliution on low load, because oem have too much resolution on low load, and vice versa. p.s. fit 350z maf, boost 1-1.2, later change turbo to something like...
by unex
Wed Aug 01, 2018 7:30 am
Forum: Type 1
Topic: S13 CA18Det Fuel cut at 15 psi?!?
Replies: 14
Views: 4937

Re: S13 CA18Det Fuel cut at 15 psi?!?

i dont see any fuel cut in the log, just lifting throttle.
If you can not reach bigger boost, maybe you have big boost leak. Have you done boost leak test?
Also, maybe you just have spark blowout issue.
by unex
Wed May 16, 2018 7:24 am
Forum: Type 2
Topic: Light throttle lean issue when using FP ecu's need help please
Replies: 3
Views: 1838

Re: Light throttle lean issue when using FP ecu's need help please

for me sounds sort of idle switch issue (even if it says its off). I would try to adjust TPS for higher voltage while its on idle and see if there is any correlation
by unex
Sat Oct 07, 2017 7:07 am
Forum: Type 3/4/5
Topic: Lean AFR on certain RPM
Replies: 16
Views: 6981

Re: Lean AFR on certain RPM

if fuel system is modified and especially if fuel damper is removed, 6cyl engines often suffers for lean spots in some places, because of fuel pulsations. Even on this forum was not so old thread about that, so may be its the same issue.
by unex
Sun Mar 26, 2017 6:28 am
Forum: Type 3/4/5
Topic: s14 sr20det engine stability
Replies: 2
Views: 2387

Re: s14 sr20det engine stability

faulty maf? i have seen faulty maf, which looked working, but it gave wrong voltage
by unex
Wed Dec 28, 2016 5:47 pm
Forum: Type 3/4/5
Topic: Lean issue Headache. Have tried EVERYTHING
Replies: 5
Views: 3742

Re: Lean issue Headache. Have tried EVERYTHING

I dont see any reason to be lean except tune. Ok, few things for you to think about: 1. I usually find that for 850-1000cc injectors latency works best in range 800-900. In some cases even around 1100. Never ever lower than 800. 2. Change K value until fuel target table afr values matches real afr o...
by unex
Wed Dec 28, 2016 5:37 am
Forum: Type 3/4/5
Topic: Lean issue Headache. Have tried EVERYTHING
Replies: 5
Views: 3742

Re: Lean issue Headache. Have tried EVERYTHING

looks like you dont have right tuner and this is your problem. Good tuner will not send tunes via email. If he is remote, at least he would connect via remote desktop. Engine from engine very different, especially when we start talking about 1000cc, e85 and other modifications. It needs proper tune ...
by unex
Tue Nov 01, 2016 1:46 am
Forum: General Nistune Discussion
Topic: Q45 AFM max HP?
Replies: 5
Views: 4400

Re: Q45 AFM max HP?

how to you calculate 20%? 5.1v compared to 4.8v does not look for me 20% difference. More like 6-7%
by unex
Thu Jun 16, 2016 1:39 am
Forum: Type 3/4/5
Topic: Base image S14A vs S15
Replies: 17
Views: 14812

Re: Base image S14A vs S15

I would say s15 timing table looks like crap. So maybe they hired cheaper tuner? :D