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by PL
Mon Oct 14, 2019 9:38 am
Forum: Type 3/4/5
Topic: S14a SR20DET bucking at cruisung
Replies: 17
Views: 346

Re: S14a SR20DET bucking at cruisung

Good to hear that you're getting somewhere with this.

I'll have a play around on the bench with the load values and see if anything can be done.

Definitely try decreasing IGN values in that area as this can have a major affect.

PL
by PL
Wed Oct 09, 2019 11:18 am
Forum: Type 3/4/5
Topic: S14a SR20DET bucking at cruisung
Replies: 17
Views: 346

Re: S14a SR20DET bucking at cruisung

Hi Pinto, I've seen SR's do this a few times. Mostly with aftermarket cams as Louis mentioned (hi Louis!). Things that will make it worse: - cams with more overlap - leaner mixtures - advanced IGN timing I suspect you have a combination of these. The VTC advances the cam across the midrange but will...
by PL
Wed Oct 03, 2018 9:26 pm
Forum: Type 3/4/5
Topic: SR20DET Very Rich@ Idle and low load
Replies: 1
Views: 396

Re: SR20DET Very Rich@ Idle and low load

Hey DC, You've probably fixed this by now but I'd say the tune is "salvageable". And you seem to know what you're talking about. All you'll need is some form of knock monitoring and you should be able to perfect the tune yourself. Latency on those is typically between about 600 and 900us. Outside of...
by PL
Wed Sep 26, 2018 10:48 pm
Forum: Type 3/4/5
Topic: S13 SR20DET STOCK MAP TP
Replies: 6
Views: 501

Re: S13 SR20DET STOCK MAP TP

Yeah looks about right. I usually follow Mr. Nissan's lead these days and reserve the last column for minimised timing, and then set it up so max boost has it just touching the second to last column. Then if the owner "accidentally" turns the boost up it'll go into the minimised timing column and sa...
by PL
Tue Sep 25, 2018 9:13 pm
Forum: Type 3/4/5
Topic: S13 SR20DET STOCK MAP TP
Replies: 6
Views: 501

Re: S13 SR20DET STOCK MAP TP

A stock S13 SR? That is a rare beast! Unfortunately I've got nothing. I have a ton of maps and logs for modified SR's but for a stock one? Not so much. All I've got is that I thought they ran a tad more boost than that - even stock. They have a couple of brass jets in the hoses to the WG actuator th...
by PL
Mon Aug 21, 2017 2:21 pm
Forum: Type 2
Topic: Battery voltage fluctuates
Replies: 1
Views: 790

Re: Battery voltage fluctuates

Yeah this is pretty common. I see it more and more in logs from RB's these days. I suspect it's an age related thing - from old alternators. New RB's (most R34's) seem to be pretty solid. But older ones (particularly track cars) with RB20's or 25's from R33 often have large fluctuations/noise. You w...
by PL
Mon Oct 31, 2016 8:44 am
Forum: FAQs
Topic: possible tune download?
Replies: 3
Views: 1775

Re: possible tune download?

Hey, which SR20 is it (S13/14/15). DO you have the ECU part number? Then I can send you a tune for the right one!

PL
by PL
Mon Oct 24, 2016 9:02 pm
Forum: Type 3/4/5
Topic: Voltage drops
Replies: 5
Views: 10750

Re: Voltage drops

Yeah for sure. I've been doing wiring conversion jobs for SR20 into older cars for years so I'm intimately familiar with those wiring looms. Although just the engine loom - obviously the body loom doesn't feature with these jobs. Over the years I've seen S13 looms that people send me go from minty f...
by PL
Thu Oct 13, 2016 9:10 am
Forum: Type 3/4/5
Topic: Redtop 2871r and S3 cams only 300whp
Replies: 1
Views: 984

Re: Redtop 2871r and S3 cams only 300whp

It does seem to be struggling hey. Have you checked for boost leaks? That'd be my first thought. After that - is exhaust nice and free flowing? That can affect power pretty badly sometimes. What spark plugs? Probably unlikely but a nice fresh set of copper "7's" is always a good starting point. Was ...
by PL
Wed Sep 14, 2016 10:41 pm
Forum: Type 3/4/5
Topic: AFR Questions
Replies: 1
Views: 790

Re: AFR Questions

Should be fine if it's only at light cruise. As long as it richens up when load is applied.

PL
by PL
Sun Jun 26, 2016 8:31 pm
Forum: Type 3/4/5
Topic: Base image S14A vs S15
Replies: 17
Views: 4607

Re: Base image S14A vs S15

Yeah good question. Short answer is that nobody but Nissan knows. Often what happens is that the car is released with Rev A of the tune. Then as they get customers actually using the local fuel and reporting back with stories of knock and broken engines they start tweaking the tune. So Rev B often h...
by PL
Mon Feb 09, 2015 9:26 am
Forum: Type 3/4/5
Topic: Setting Injection Multiplier
Replies: 52
Views: 12927

Re: Setting Injection Multiplier

Yes, that sounds correct. So you have 600cc injectors.

What should be good for around 500hp depending what max duty cycle you're prepared to run them to.

PL
by PL
Wed Feb 04, 2015 3:01 pm
Forum: Type 3/4/5
Topic: Setting Injection Multiplier
Replies: 52
Views: 12927

Re: Setting Injection Multiplier

Saw a good rule of thumb the other day: Injector size (cc/min) / 5 = horsepower (per cyl) So for a 4 cylinder engine running 370cc injectors it'd be: 370/5 * 4 = 296hp Which is probably not too far off the mark. But there are lots of online calculators out there. Just Google "injector size vs horsep...
by PL
Mon Sep 15, 2014 1:11 pm
Forum: Type 3/4/5
Topic: Setting Injection Multiplier
Replies: 52
Views: 12927

Re: Setting Injection Multiplier

Is fuel pressure OK?

PL
by PL
Mon Sep 15, 2014 12:08 pm
Forum: Type 3/4/5
Topic: Setting Injection Multiplier
Replies: 52
Views: 12927

Re: Setting Injection Multiplier

Yes, use the "N62" Z32 MAF. These are good and common. - make sure it's wired correctly (should see about 1.0 to 1.2V MAF voltage at idle) Then in NIStune: - turn IGN on (don't start engine) and connect to NIStune. - check that there are no fault codes present. Important! - sync tune from ECU > NISt...