Injector interchangeability and plugs to suit

[Omegaman]

there's heaps of info around that can let you know what car to go for.
Though there's really 3 types of plugs, EV1 square type, denso round type and 1 other.
whats the code on the plug, as casey G says, the colour of yours don't seem to match the 4agze.

[worldwalker]

I was hoping to upgrade the injectors in a 3VZ to a set of 7MGE injectors I have but I didn't check the type and despite having the same plug, same resistance they're a different and wont fit in the intake manifold.

As far as I can tell the main difference is that the 3VZ's are an air shrouded injector and 7MGE are not. What I'd like to know is if there is any way to get the injectors fit neatly or if I should seek air shrouded injectors? I've tried searching high and low on here and google but without the right terminology I can't source any information on the different valve types. All I could find was pintle or otherwise.

From the links on here the 3VZ injectors are "cone" while the 7MGE are "Ball"; I'd like to know if this refers to being fitted with an airshroud or not? What are the advantages of air shrouded injectors over those that are not and vice versa? What are the other options out there? How hard is it to source injectors that will fit the head and rail without having to modify more than the plugs (and pump, FPR etc)?

I know its a bit to ask but I've really struggled to find a reasonable strait forward answer to what are fairly basic questions.

Thanks.

EDIT:/ on inspection, other than the 3VZ's plugs being a different colour to that listed (grey instead of Brown), the nozzles look identical (both have a flat finish with 4 holes, 2 large, 2 smaller) except that the 3VZ has an 'o' ring with seating recess while the 7MGE have a rubber seat, the 3VZ injector is longer with a small recessed section that has 2 small holes and a second large rubber seat/seal 1/3 of the way up. The recessed section and second seal are obviously for the aeration. I suspect with the additional seats and depth required due to the aeration, none aerated injectors won't fit the head.

[Omegaman]

not sure if 7MGE injectors are correct.
see these below.
Stock 3VZ injectors are 240cc.

Stock 1MZ injectors are 245cc.

Stock CA spec 1MZ injectors are 255cc.

Stock CA spec 93-97 2JZ-GE injectors are 310cc.

All of them are air-assisted.

[worldwalker]

Is there any advantage of air assisted injectors over those not?

If I'm running higher pressure through the rail would it be worth sourcing a better pintle type injector over the factory air assisted types?

[oldeskewltoy]

not directly pertinent to pintle types, and air assist....

From the USA... mid to late 1980s Honda Accord 2.0, and Prelude 2.0 use a low ohm, top feed injector that is rated @ 240cc - tan in color. This is a quick, and painless mod for a 256, or 264 cammed 4AGE

[stepan117]

I am running RX8 750cc injectors which came from the U.S complete with plugs and are a perfect fit for my 4agte injector rail
Sorry but i don't have the receipt / company name at hand just now

[LittleRedSpirit]

Reviving an old thread with some great info...

I have an RA65 with a low mileage 22re. Its got a slight shake at idle and really low throttle openings, I suspect its a set of dirty injectors causing this.

In my research I have found that there are better designs of injectors available with more nozzles that make a much finer mist eg Bosch.

What I'm wondering is: does anybody know of any later model cars that share a compatible injector in both impedance and physical fit that will allow me to remain at stock flow and just upgrade to something that works better than the old 2 nozzle type.

If the info in this thread in the above posts is correct, any injector that is compatible with a 16v 4age should physically fit. The stock 22r-e injectors put out 200cc/minute. The 4age ones output 213cc/minute. I feel this is acceptable for the ecu to compensate for. I'm also wondering if the difference in impedance from 13.6 to 13.8 ohms is within tolerance, I would assume so, but I dont know 100%.

SO to make a long post short;

Can I plug and play with 4age injectors into a stock ecu 22r-e efi system, and will this give me the desired upgrade in injector nozzle design? Are the plugs the same?

I figure If I'm investing over a hundred bucks in injector cleaning then I may as well use the best kind of injectors I can.

[dnegative]

Yeah they will work, engine may run a little rich.
Better off getting yours cleaned and flowed though?

[LittleRedSpirit]

Not if they fit right in and give me a finer atomisation of fuel. It will run a lot sweeter with a finer mist I think. I saw this video and it got me thinking. Since mine need cleaning anyhow I figured that Id look into a better injector design from a later type of car.


Video
22RE vs 4-hole Bosch upgrade injectrors - YouTube

So the question is are the 4age injectors a 4 hole or better type that will make a finer spray?

[dnegative]

So the question is are the 4age injectors a 4 hole or better type that will make a finer spray?

Smallport injectors are, but I'm fairly sure they wont be 213cc nor will they be low impedance

[eightsixboy]

Quoted by HP Imports no 66.
Choose power you are aiming for (RWKW)
For example, power aim is 370rwkw from a 6 cyl GTR
All injector ratings are worked out in crankshaft power, so the first thing we do is to
add 17% to rear wheel figure to get in the ballpark.
Calculate (370 + 17% = 432kw or (multiply by 1.34) for 580hp.
the conversion to HP makes sense her as this gives you the ability to select an American injector (rated in lbs/hour) or Euro/ Jap style (rated in cc/min.
With 580hp at crank, we then determine each cyl power output (580hp divided by 6)
is 97hp. As a rough guide each injector will have to support 100hp per cyl of fuel flow.
Now if this 100hp were halved, it gives us the 'pound per hour' rating of the injector needed to get the job done. The 50lb/hour answer that this calculation gives then needs to be multiplied by 10.4 to give the 'cc per minute' or metric rating of the injector, which is 520cc.


Is this 100% accurate? If it is then it would suggest 315cc gen 3 1GGTE injectors should be able to flow up to 230rwkw+?

Sorry to bring up an old thread but thought I'd ask before I go out and buy some injectors.