i have a 92 hatch with a sohc vtec and i recently wired in some obd2 injectors from a obd2 accord f22 are these any bigger than the z6 or y8 injectors. i need to know cause i may be maxing out my injectors. please help me i heard they were the same as the h22 wich is supposedly either 310cc or 295cc

 

for the h22 injectors lol thats what im running on my sohc y8 i could tell a big difference and i added a fuel pressure regulator best bang for the buck i was short on some N's on getting RC

 

Honestly the cheapest and probably best thing you could do would be to go buy some used DSM 450's and get a resistor box.

A 295-310cc injector is just small man, you can usually locate the 450's and the resistor box for 60-75 bucks.

 

i second that

 

You just don't put in DSM 450's and a resistor box and expect it to run perfect. Since it's peak-and-hold type injectors they will FLOOD...which causes the car to run like shiet or not even run at all without something to control it (eg. engine management).

 

if he's running turbo, i hope he already has some type of engine management

the question is what is it?

 

get dsm 440's cost you maybe 60 bucks with resistor box

 

Exactly, with the EM's we have today, there is no reason to think someone wouldn't have something to control them.

And they won't flood just because they are peak and hold type injectors, they will flood because they flow twice the amount of fuel the ECU is programmed to meter.


nekoabandoned, there are no DSM 440's and the correct size has already been mentioned.

 

who says 310s are too small, hell a 240cc is good for high 100 low 200hp levels. good enough for a stock 190hp teg. 310s are capable of 300hp easily. but like said, 450s are so cheap, just get some.

 

Sorry bud but you are dead wrong there, it's not a good idea to come throw a bunch of info out which people will listen to because you have a high post count and end up leaning out and killing things here.

With the static fuel pressure at 43.5 (average) and BSFC for a FI car being around .55, a 310cc injector will support 175 horsepower at he FLYWHEEL. This is at 80% duty cycle which you shouldn't go over because of the inability of injectors to flow properly and the possibility of them going static.

For 300 hp safely at the same measurements above, you should be running 550's.

It has been proven over and over again that a DSM 450 peak and hold injector will support 330 ish wheel horsepower safely at less than 85% DC but a 310 from a lude just isn't going to cut it.

Last but not least, the injectors supporting that 190 hp teg were put in by Honda for an NA motor with a .45ish bsfc and are running right at 100% duty cycle at redline.

Not something you want to attempt with an FI motor unless you have the money to burn to replace pistons every time you lean out and lift the ring lands.

 

i never said it was a good idea. just said that they wont be 100% maxed out. very good info non the less.

 

It's all good. If you will go hit up google and read up from like RC's website on calculation of fuel injector sizeing, it's some pretty good info. There are lots of other sites out there as well that will help you understand how all that **** works.

 

i just use the basic rule of thumb .95cc/hp. personally i tend to overkill in the fuel department.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by schardbody &raquo;</TD></TR><TR><TD CLASS="quote">who says 310s are too small, hell a 240cc is good for high 100 low 200hp levels. good enough for a stock 190hp teg. 310s are capable of 300hp easily. but like said, 450s are so cheap, just get some.</TD></TR></TABLE>

With a stock fuel pressure regulator and assuming 10psi of boost for 53-55psi fuel pressure, you can only safely get around 220 WHP with 310cc injectors given a reliable 80% duty cycle.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Jim Truett &raquo;</TD></TR><TR><TD CLASS="quote">

With a stock fuel pressure regulator and assuming 10psi of boost for 53-55psi fuel pressure, you can only safely get around 220 WHP with 310cc injectors given a reliable 80% duty cycle. </TD></TR></TABLE>

i never said WHP, but its cool, thanks for this info.

 

Stock FPR is not a 1:1 FPR so you will only see 43 psi of rail pressure.

 

boosted92hatch,

if you want to learn and make your own decision try here

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

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