1G Injector Limit

[Karma Supra]

How did you go about the 02 sensor? Just put it in one dump pipe? mount it at the join?

[TheToyman75]

Charlie,

The O2 sensor is just in the one pipe. The merge collector is under the car and to far away so not really a suitable location. The 1G trims fuel globally anyway and of course its only used on light throttle cruise and idle. Thankfully its not like the 2J which runs 2 seperate sensors.

You can see it in this shot here:



BLK1G-GTE,

Mate the Merg collectors took quite a long time due to the low ride height of my Celica and how they need to turn around the drag link. At a guess I'd say there were about $600 od of the bill ? They are stainless tho and 2 1/4" stainless mandrels hurt. In 2" and/or Mild steal they would be allot less. I wanted them as 2 1/4" tho as dual 2/14" is actually slightly bigger in volume than a single 3" which is what the rest of my exhaust is back to the side pipes.

Really looking forward to seeing how yours and Pubes 1G's go. The Toymods 1G community really has pulled together over the last 12 months or so and some really good results are being had becasue of it.

[JustCallMeOrlando]

When's it going on a dyno Rod?

[Karma Supra]

Awesome! Fingers crossed I can get a similar setup on mine. The 1G scene is very small in the uk, but its growing... slowly..
Out of interesst did you do any porting or anything on the manifold?

[renxun]

The term rising rate fuel pressure reg is applied to 2 different types of regs. Almost All forced induction vehicles have a Boost referenced fuel pressure reg. They have to. When you create boost it pressurises the intake manifold, this pressure is present at the base of the injectors so for them to maintain the stock base fuel pressure the fuel pressure has to rise equal with the increased pressure in the manifold.

The most commonly refered to rising rate reg is when the fuel pressure rises at a greater ratio than 1:1 YOU can get them at all different rates. These artifically increase the scope of your injector under boost without effecting fuel pressure at idle. They arean ugly way to overcome injectors that are 2 small for there application.


Kyosho,

Go back to Primary school and come back when you have half a clue or actually want to learn. You clearly HAVE NO IDEA what you think your talking about and are a discrace to this thread. You clearly have no concept of viable opperational pressure for a fuel injector or what happens to fuel pressure under boost. 85 PSI base pressure, then add what 20 25 PSi boost ? That over 100PSI fuel pressure. Go put a stock RB25 side feed inan injector flow tester, crank the fuel pressure to 105PSI and watch just how little it flows.

erm...fuel lock might occur.. fuel pump flow rate drop super drastic above 70psi.... i dont know much ... just the basic on how system work.... as i said maybe they have sub injectors...

[TheToyman75]

Just reviving an old thread.

Heres the link to the whichhunters site with the 1G Gen 3 Injector. I'll post up again if I find a "suitable" replacement injector. Anyone else found anything of interest ?

[ra23celica]

Rod,
G'day.
Regarding anything of interest..
Am I right when I hear that 4A-GZE injectors are a straight replacement for the yellow units in a 1G-GZE?
Thanks,
Mitch.

[BLK1g-gte]

I think i am just going with a Sard FPR and a Walbro pump and see how much i can push out of it once i convert it to manual Been seriously considering the dumps but Rod.

[TheToyman75]

I am hopefully onto an injector that will give me just that little bit more fuel I am after to get the RA28 into the low 200rwkw end of town. Once I have my hands on thema nd can confirm they will do the trick I'll post up some more info.

For the guys chasing more power than me tho the Nipondenso Injector, part number - 195500-2010 is a 13.8 Ohm injector and it flows 460cc at 3bar Thats a direct fit replacement right down to the injector plug and will run without the need for the injector resistors looks like a much better option that the 7M-GTE items for us Gen 3 1G owners. Apparently there are fitted to the 89-91 RX7 N/A engine ?

[JustCallMeOrlando]

Is it possible to just run 7MGTE injectors but integrate the ballast resistor from the earlier 1G's?

[TheToyman75]

Is it possible to just run 7MGTE injectors but integrate the ballast resistor from the earlier 1G's?

Me and wiring is a bad combination but yes I beleive that would work.

[JustCallMeOrlando]

Dude, you have Mos

I only suggest it, because whether it's boloney or not, I've head the spray pattern isn't great on RX7 injectors? Whether it's all of them or just the 550cc jobbies I don't know.

[TheToyman75]

Dude, you have Mos

I only suggest it, because whether it's boloney or not, I've head the spray pattern isn't great on RX7 injectors? Whether it's all of them or just the 550cc jobbies I don't know.

The 550cc RX7 Injectors are a very differnet animal to the 460cc items. That being said I have not checked the spray pattern on a 460cc RX7 Injector.

As for Mos...... Have you seen the Movie "Wog Boy" ? Mos works harder at avoiding wiring work than Steve's neighbour Theo does at getting benefits

And for some actually useful information.

I have found my injectors of choice.
Nipondenso Part Number 23250 74160 as fitted to the N/A 3SGE - Generation 3 (SW20 MR2)
They are rated at 372cc @ 3bar and are 13.4 ohm so just under 20% bigger than the stock 1G injector so will work great with a signal bender like the Xede.

I have just cleaned and serviced my set and they flow 450cc @ 3bar - Wide Open flow