Injector Lag Times

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Joined: Sun Feb 17, 2019 6:25 pm

Injector Lag Times

Postby devo64 » Sun Feb 17, 2019 6:33 pm

Hi all
Does anyone have the injector lag times for the 800 CC HKS injectors 14002-AK001 they are green top feed injectors for RB26 engines

Unable to find anything on them.

Thanks in advance

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Re: Injector Lag Times

Postby Peterson » Sun Feb 17, 2019 10:20 pm

"These are very non linear injectors and I assume that you will have a difficult time getting these dialed in. SARD / HKS only uses 1.6 ms as a base latency for unknown voltage. They will be a pain to dial in at idle. I have worked with a few of these. They take a little longer then normal.

Start with these settings.

11.00v 12.00v 13.00v 14.00v 15.00v

1.94ms 1.78ms 1.62ms 1.52ms 1.42ms

You will need to dial this in more. It involves logging STFT and LTFT as well as Average IPW and bit of math and time. Fuel pressure on these injectors plays a huge roll as well. I think that SARD / HKS rates the base @2bar so if you run @3bar you will be changing the values, as this injector is most likely a 845cc injector."

That was the reply at another forum from Rich RDE.

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Re: Injector Lag Times

Postby Drwaffles » Wed Feb 20, 2019 10:03 pm

There are companies that can test injector dwell times, and they're not even extraordinarily expensive.
I'll try and dig up the name of the place that I contacted that can do it (They even use a Haltech as a test bed)

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Re: Injector Lag Times

Postby HaltechMatthew » Thu Feb 21, 2019 9:59 am

Almost all injector manufacturers seem to hold important data on how to use their products so close to their chests and give very little assistance to their customers, it just baffles me why they don't provide this to the public. Kind of like buying a micrometer and leaving off the markings for graduations... kind of useless.

We though have intentions to eventually test and profile most common injectors in the near future. Facilities are here, but time is (as always) the prohibiting factor.

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