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R35 Injector Kit for SR20s keeping stock plenum...

I've been seeing this on a lot of cars lately in Japan. Its actually really cool affordable product. 1k Yen for S13 or 1.9K Yen for S14/S15

Looks like the atomization of the R35 injector way better than standard and I believe from what I read the injector control is better than obviously our 20 year old injectors

Thought it looked like an awesome kit

http://yashiofactory.co.jp/?page_id=374

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My!

so $2k to run 570cc injectors?

FaLKoN240

Ken def misquoted the price

105,000Y so yes about 1k for the adapter... not cheap lol

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slider2828

S15.14用　¥198,000-税別 nah its 1.9k yen for S14 and S15 lines.

It includes injectors, lines, rails, fpr, 2 rail adapters, an barb fittings etc.....

Its a full kit.

Yeah I guess for 550, pretty pricey, but those R35 injectors are like $150 a piece......

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brndck

thats very cool that they're still developing new product for such an old engine.

if you get better atomization out of a r35 570 than you do a nismo or denso/sti 550, you'll get a better burn and more complete burn in the combustion chamber, less wasted fuel, etc. Yes its expensive, but i'd take the trade in efficiency for only $1k

we're just used to 240 ppl being peasants.

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silviaks2nr

You can get a radium rail/FPR and ID1050 for that... and it's not pink

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FaLKoN240

That's the whole point of buying Yashio stuff!

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Kingtal0n

atomization, hmm
thoughts

1. the injector does not spray through an open intake valve in a factory installation, instead the fuel is injected to the closed intake valve in order to warm the fuel by virtue of cooling the valve.
I am not sure it is a good idea to set the injector timing for low speed operation to post-overlap (after intake valve opens) for a number of reasons. Perhaps the valve will run hotter now (its almost a certainty). Perhaps the fuel is more likely to wash down the cylinder walls (being that it is injected cooler, it didn't get a chance to warm on the valve). So atomization improvements are welcome if the fuel is being directly injected to the cylinder through an open valve. That said, how will you be SURE yours is doing that in an installation to take advantage of this slight benefit?


2. If the injector timing is set to spray through open intake valve, the spray duration can only be very short (just until the valve closes) so this is merely a low-speed property (atomization is only useful at low engine speeds and low/cruise situations). Anytime the engine is using say 30% or more (more engine load, starting to make power) of it's injector "duty cycle" it means the injector is on much more often, so there is no way to avoid closed-intake valve injection for the majority of situations. In other words, atomization improvements are welcome but only for the extremely low speed/output situations where injection duty cycle is at it's lowest ranges and only if the injection is timed to begin exactly after the exhaust valve has already closed. In many applications one needs to degree the cam, then perform a calculation using the actual closing degree of exhaust lobe to get the maximum 'window' for injection.

personal opinion
I'll never use a sub 1000cc injector again on an sr20 lol
and I'll never own a sub 500hp 2.0L either, the turbo tech has really gotten good enough you can say that now

PoorMans180SX

This statement is bullshit. Atomization is the reason direct injection engines make more power than port injection engines. They do so because they atomize the fuel much better, thus having a more consistent and stable fuel burn, allowing the optimization of fueling and timing. Better atomization is always an advantage, across the entire rpm band and at any power level.

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andisan

Hmmmm interesting


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Kingtal0n

someone asked for an elaboration of the injector comment,

How to choose injectors in 2019

In the past, say from 1995~ to 2002~ roughly. It was a very good idea to match the size of the injector to the exact power you expected to make for street cars, because it gave the best resolution in the fuel map for daily driving and economy features, and if you wanted something larger say 80lb/hr+ you were usually stuck using low impedance units with poor control for low speed operation. It punished you hard for choosing a huge injector if you didn't actually need one.

However, injectors are remarkably easier to control these days, and computer-microprocessors have become more reliable and much faster as well. Circuitry (injector drivers, amplifiers, techniques and basic ICU for controlling voltage signal) has improved.
What that means is you no longer need to suffer when using larger injectors.
You can now buy 1000CC, 1400CC, probably even 2000CC injectors that will run and drive fairly well in a daily driver application, especially when using high volume flow fuels like E85.

If that wasn't enough, there are two other benefits to using a much larger injector than needed for the application:
1. The injector driver will run cooler during max output, thus it will be more reliable, the injectors will be at a lower duty cycle using larger injectors.
2. larger injectors give more weight to injector timing curves, since more fuel is injected in the same amount of time, more fuel can be fit into a short window.

And lets not forget room to grow is on the table

e30gangsta

I'd suggest if you're running pump fuel to stay in the 1300cc range and below. You should only run bigger than that if you're going to be running e85 or race fuel.

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Myogi

Amazing stuff here.
Love me some Yashio.

Have a good one,

Myogi.

ixfxi

does every post of yours need to be 6 pages long? come on man... its 2020 we aint got time for all that reading n shit

My!

i asked him to elaborate, I like learning/ reading concepts.

tunermt

Just stumbled on this thread after a random google search for SR20 injectors...

After tuning hundreds or engines with a huge range of uses/power outputs including SR20de, det, ve and vet I think it is very important to help shed some light on injector options.

Hands down the best injectors on the market are Injector Dynamics and in most cases the ID1050 sr20 injectors are more than enough for most SR builds and will out perform something like OEM r35 injectors across the board when tuned with a modern ECU such as Motec m1, AEM Infinity or Haltech Elite.

If some one tries to sell you another injectors option i would highly recommend taking a step back and work with a supplier/tuner that understands the importance of running ID injectors.

***If you have a used/free set of R35 injectors or other that are dead set on using SEND THEM OUT FOR SERVICE (cleaning and flow test). You do not want to waste your first tuning session $$$ trouble shooting a dirty set of injectors!

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inopsey

can you elaborate on why ID injectors are superior to other brands such as desno or other quality brands at the same cc rating?

slider2828

Yeah I am looking for a set of ID1050x..... anyone got a hook up.

@poorman love how you read into the details

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TheRealSy90

Honestly for the same price you might as well just buy the newest id1300x injectors. Especially if you have any e85 plans at all. They?ll perform just as well at low duty cycle as the old 1000?s


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slider2828

Nah no plans on E85.... Not that readily available + I would need to convert my lift pump and lines to E85 compatible....

Meh... not worth.... on 400 to 450 WHP on GT2871R 86.... 1050 more than enough I think on 100oct

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jr_ss

Yes, 1050 are more than capable. People also forgot that increasing base pressure increases fuel injector CC?s. You can always adjust up to a degree. I wouldn?t suggest running 73psi base though.

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