B20 doubt

[todaek9]

Before i head on to my topic, I just wanna know how many cc are the H22a injectors?

Will it be good enough for a B20 with the potential for low 11sec to high 10sec pass?

Yes/No? Why?

I'm trying to solve a mist...

[DynoDave]

Before i head on to my topic, I just wanna know how many cc are the H22a injectors?

Will it be good enough for a B20 with the potential for low 11sec to high 10sec pass?

Yes/No? Why?

I'm trying to solve a mist...
Which model H22a injectors are you talking about as there are 2 different types listed (1992-1996 Peak and Hold 345cc, 1997 and up Saturated 280cc) now after testing some of these I have found that AU spec H22a engines come with 240cc injectors so to run the times you are asking they would be to small.
Regards Dyno Dave

[JohnnyVtec]

Todaek9, Smart thinking on your part for using the oem injectors. what dave said is 100% accurrate. if you have OBD2 harness and are running N/A the 97 & up saturated from america or japan would be the way to go, so long as you're using a hp-fuel pump and adjustable fpr. you will be running a near perfect setup with a perfectly directed mist & the injectors might not even see 100% duty cycle when you hit rev limit if tuned properly.

:thumbsup: it's good to see some people on ozhonda actually know about things like how running too large of injector will lose power.

[Bowzer]

If your looking to run a 11 to 10 sec pass, OEM injectors definitely ain't going to cut the cheese... a B20 setup all motor setup making somewhere over 250whp+ in a light weight chassis would be running a bare minimum of 440cc. Your spending big bucks cheaping out on used injectors don't justify the money you spent on everything else! Keeping this in mind lets check out RC engineering's Online Injector Calculator. http://www.rceng.com/technical.htm#WORKSHEET Lets assume your car makes 250whp and suppose you want your injectors to run at 50% duty cycle to be on the conservative side. Mind you RC engineering injectors are tested at 44.3psi of static fuel pressure. That is there optimal working pressure, RC recommends to keep it around this level. So you get roughly 653cc/min. Note 80% duty cycles considered the max by industry standards so at 80% works out to be 413cc/min. So realistically 550cc would be your safest bet the cost difference is not by much.

[Bowzer]

Just to add, at these times in NA trim you would have more then likely to be running ITB's. To get more technical, other factors to consider is the ports of the head, air flow velocity and its affect on fuel atomization are just to name a few not to mention spray patterns and injector angles and injector placement are other areas that will give your motor that extra horses to push your car quicker to the end.

[todaek9]

So it's better to use which? the 1992-1996 or the 1997?

nope..not running ITB Bowzer...

I guess the question of "it's good enoough or not" will depends how u setup your car...isn't it????? hmm...

[Sexc86]

Todaek9, Smart thinking on your part for using the oem injectors. what dave said is 100% accurrate. if you have OBD2 harness and are running N/A the 97 & up saturated from america or japan would be the way to go, so long as you're using a hp-fuel pump and adjustable fpr. you will be running a near perfect setup with a perfectly directed mist & the injectors might not even see 100% duty cycle when you hit rev limit if tuned properly.

:thumbsup: it's good to see some people on ozhonda actually know about things like how running too large of injector will lose power.



please explain how running injectors rated to a higher cc can make you loose power? i though you could run large injectors, on any car, just simply a built engine would use them and a standard engine wouldnt?

[JohnnyVtec]

;) First off you're not reading my post correctly, Too large/too many cc of an injector causes horsepower loss.


Analogy.....



A. I have a kinked garden hose which i will spray a very sloppy droplet type of stream down the hallway to rinse the floor.

B. I have a garden hose with no kinks and a fine high pressure stream which i will spray down the hallway to rinse the floor.


C. which will be more efficient/accurrate?




D. Please tell me you don't still not, understand???

[todaek9]

if you flood your engine, means inefficient combustion...

[fishman]

please explain how running injectors rated to a higher cc can make you loose power? i though you could run large injectors, on any car, just simply a built engine would use them and a standard engine wouldnt?


when you put fully sick 2000cc injectors into your d-series. but then again, it might be able to handle it, spaceships do need a lot of fuel.

[tinkerbell]

Before i head on to my topic, I just wanna know how many cc are the H22a injectors?

Will it be good enough for a B20 with the potential for low 11sec to high 10sec pass?

Yes/No? Why?


no. i am running OBD1 H22A 345cc injectors at 50psi and only making 120kW

you need over 220kW to run an 10 sec pass...

[tinkerbell]

have a play here and you can see for yourself:

http://www.rceng.com/technical.htm#WORKSHEET

EDIT: doh - beaten by bowzer!!!