320cc Injectors work in an H22?

[tweeaks]

Im fixing to put my H22 in my new accord but one of the H22 injectors was messed up. I have a set of Isuzu Impulse RS injectors that are peak and hold and flow 320cc. I know the H22 Injectors are 345s but dont think the lower flowing injectors will hurt. Does anyone know if Ill be alright using the lower flowing injectors?

Thanks for the help

[bruno8747]

They maybe peak and hold but what about internal resistence. The Regular usdm h22's came with 290cc I believe and I see no problems with using the 320's but H22 injectors are relitively cheap

[tweeaks]

the 97 and up H22s are the 290s and are saturated. I'm not sure about the resistance I always thought that saturateds were low and peak and holds were high.

[wed3k]

just modify the resistance box.

[tweeaks]

Why would I modify the resistor box?

[Accord R33]

I would either:

A. buy H22 injectors
B. use the 320s and have it re-tuned. even if its just with a VAFC or something.

gas is expensive.

[Noxidea]

ok so what does the JDM H22 have for injectors ?? Im just wondering I have one in my car but ive never had to do anything with them , I beleive they are 345CC am I mistaken ... Sorry to thread jack ...

[blakmetal.honda]

I know the H22 Injectors are 345s but dont think the lower flowing injectors will hurt.

ok so what does the JDM H22 have for injectors ?? Im just wondering I have one in my car but ive never had to do anything with them , I beleive they are 345CC am I mistaken ... Sorry to thread jack ...

Way to read the original post. It holds your answer..

[customchord]

I thought that the JDM H22a and the USDM H22a had differnt size injectors.

[Night Wolf]

I thought that the JDM H22a and the USDM H22a had differnt size injectors.

no I think its the CC rating

[HondaFan81]

Im fixing to put my H22 in my new accord but one of the H22 injectors was messed up. I have a set of Isuzu Impulse RS injectors that are peak and hold and flow 320cc. I know the H22 Injectors are 345s but dont think the lower flowing injectors will hurt. Does anyone know if Ill be alright using the lower flowing injectors?

Thanks for the help

I'm not a tuning expert, but from what I learned, you will need to retune your engine management for a change in fuel injector size. Therefore, it is better in your case to find another equivalent replacement. Your fuel system pressure remains constant, but you lower your original injector size so it will lower your fuel output in certain areas. Your engine management needs to adapt to a change in injector size so it can adjust injector pulse widths accordingly, etc. to result in similar fuel output to your original setup.

I've personally had JDM H22 injectors, had them cleaned/flow tested and they are rated at 345 cc/min, but all 4 flowed 355 cc/min at industry standard 43 psi. I used these injectors for my initial engine break-in on my white project, sold them to upgrade to RC 550 for final tuning. So I don't have any, sorry.

I too believe the USDM H22 injectors are a lower rating, not postive on their size. Rule of thumb is you can run saturated in a peak/hold setup, but not vice-versa. Some say to remove the resistor box, others do not, seems like both ways work. I personally believe in simplicity and sticking with the same system, I don't like hacking into stock wiring harness, unless for minor things.