Injector Latencies

[Ol_Mate]

Can anyone provide me with the latency times for nismo 555cc RB25DET injectors please?

I reckon it would be sweet if there was a database for the most common injectors latencies and whatnot...

[Adriano]

Wow, i asked this like 2 days ago, and no responses

[STATUS]

i have given all the latencies to gizzmo for their tech forum, i will find the link and post it. If he hasnt done it yet i will post up my table on monday (its at work).

[Leadfoot]

Can anyone provide me with the latency times for nismo 555cc RB25DET injectors please?

I reckon it would be sweet if there was a database for the most common injectors latencies and whatnot...

Double that request for Nismo 555cc injectors latencies.

I can't find that data anywhere.

[NYTSKY]

Double that request for Nismo 555cc injectors latencies.

I can't find that data anywhere.

Triple that request

[Leadfoot]

come on.... someone must have latencies for yellow Nismo 555cc injectors.

Must be the one of the most common upgrades.

If anyone has them please have look in your PFC hand controller and see latency your tuner has used.

There are three people here waiting for this and probably more that will benefit from this information.

It will at least let us drive our cars down to the tuning shop with some peace of mind that the fueling is not excessively lean.

Once my car is tuned I will post up the latencies my tuner has used.

[Beer Baron]

have you not tried googling? nismo 550cc lag time nismo 550cc latency etc. keep going till you find it, the truth is out there. That's what I've done every time I needed to know and injector lag time and it's never failed me.

[Pauly33GTS-t]

Anyone know the max latency for stock GTST injectors so I can identify a warning zone? Trent have you got that link?

[grigor]

Correct me if I'm wrong, but I thought Nismo 555's had the same lag time as the stock Nissan 370's.

That is 0.64ms at 14 Volts.

I believe the Rb25 default PFc setting is 0.528ms at 14 volts.

You should be able to work out your correction from those numbers.

[Leadfoot]

have you not tried googling? nismo 550cc lag time nismo 550cc latency etc. keep going till you find it, the truth is out there. That's what I've done every time I needed to know and injector lag time and it's never failed me.

Yep, tried the google. Nismo 555cc get a few more hits than 550cc but still no success.

Heaps of forum discussion, no solid data.

- Japanese instructions do not mention anything.

- No data on Nismo website.

- PaulR33 FAQ does'nt list 550cc Nismo injectors unfortunately.

(http://paulr33.skylinesaustralia.com/docs/powerfc-faq/powerfc-faq.htm)

If anyone is running yellow Nismo 550cc injectors the sharing of their PFC latency setting in this thread would be appreciated.

Incorrect latency settings can be fixed by compensating the fuel map but that is a less than satisfactory outcome to my mind.

Only data I can find is 0.710ms. However, I would personally prefer a more reputable source than this random thread.

http://forums.freshalloy.com/showthread.php?p=1452662

[STATUS]

HAHA sorry i forgot

nismo 550cc 0.71

Std lag times to calculate differrence; (for some reason i lost my second decimal place i will fix it asap

RB26DETT

440cc

0.77ms

RB25DET NEO

380cc

0.6ms

RB25DET NEO

380cc

0.7ms

RB20DET

260cc

0.7ms

SR20DET (s15)

480cc

0.5ms

SR20DET (s13)

370cc

0.7ms

SR20DET (s14)

370cc

0.7ms

CA18DET

370cc

0.6ms

2JZ-GTE

440cc

0.9ms

3S-GTE

540cc

0.5ms

4G63 (1-4)

510cc

0.8ms

4G63 (5-8)

560cc

0.8ms

13B-REW

prim 550cc

0.8ms

sec 850cc

0.7ms

EJ207 Sti

520cc

0.7ms

[grigor]

nismo 550cc 0.71

At what voltage???

That looks like a 12 volt figure.

[STATUS]

BLITZ PERFORMANCE INJECTORS

UNIVERSAL

1000

1.00

RB26 / CA

700

0.65

RB26 / CA

660

0.55

RB26 / CA

534

0.85

1JZVVTI

525

0.99

1JZ / 2JZ

540

0.56

SR / RB25

550

0.85

SR / RB26

850

0.85

2JZ

850

0.85

[Beer Baron]

while you're at it, have you got the figures for sards?

[Leadfoot]

Moderators,

Please consider moving this thread to the FAQ when it is complete.

[Pauly33GTS-t]

RB25DET NEO

380cc

0.6ms

RB25DET NEO

380cc

0.7ms

Im guessing the first one isnt a neo trent?

[GTRNUR]

Interesting thread. My experiences with nismo 550's on a sr20 was that they lost the ability to deliver fuel properly below 1.45-1.55ms. That was firing the injectors sequentially on low impedance injector drivers.

So I am guessing the 0.71ms latency means time for the injector to change from closed to completely open... and not back to closed again.

I've read that some sard regulators are stable down to 1.1ms with stable fuel delivery, so the latency has got to be close on 0.45-0.5.

Cheers,

Ian

[wolfwood]

WTF... do nismo even make 550? isnt it 555cc? anyway.. im after the EXACT Latency times For Nismo RB26DEtt 555cc injectors. to re-configure the Power Fc..

Thanks Guys,

If anyone has 555cc injectors on the power fc and run them on an RB26DETT please goto your car and check the Latency time set into your hand cntroller hanks guys.,

[nizmo_freek]

Hi Guys

Sorry to bring up an old thread, but i need a bit of help.

I will be installing my nismo 555cc injectors and setting up my power fc for the injectors in the next couple of weeks (running a HKS 3037 Pro S and all the supporting mods) before i book it in for a tune, i have worked out the injector correction and injector latency correction numbers that i need to change in the PFC, can somone please comfirm for me that these are 100% correct?

"INJECTOR CORRECTION"

- Formula = stock 370cc divided by nismo 555cc = 0.66cc x 100 = 66%.

So i would go into the power fc and change the INJ correction to 66%, correct?

"INJECTOR LATENCY CORRECTION"

From what i have found the latency for the nismo's is 0.71msec and stock is 0.52msec

- Formula = nismo 0.71msec minus stock 0.52msec = 0.19msec

So i would change the INJ Latency numbers for each injector to 0.19msec, correct?

Hopefully this can help people in the future that are looking for the correction numbers .

By the way, someone should sticky this thread!!

Cheers

Edited February 9, 2008 by nizmo_freek

[paulr33]

when you get a working list / set ill add em to the pfc faq