why is it necessary to have a resistor box for injectors above 650cc? or which injectors is it not necessary to have?

 

high impedence = you don't need one
low impedence = you need a resistor box (or you fry your ecu's injector drivers)

 

Peak & Hold = 2-3 ohms = you need the resistor box.
Saturated = 12-15 ohms = you dont need the resistor box.

The resistor box itself is simply four seperate high current resistors in a metal heat sink. They should typicaly measure 10-12 ohms.

Edit: Here is a picture of how mine looks and where I mounted it. (Note my "Super Manifold" being used as an oil tee in the background.)

 

where is that mounted? you cant mount it on your firewall or you dont want it mounted there?

so what injecotrs are you running on you si? i got a old 90 crx resistor box, thatll work right?

 

yeah any obd0 resistor box will work

 

do you need a resister box if you are running dsm 450cc injectors?

 

yes you do

 

The resistor box was from a junkyard and it had the mounting bracket on it still. Strangely, it fit my need just right... I used a scrap bolt and mounted it on the side of the intake manifold below the brake master cyl. Right now I run RC 550cc injectors but once i get some money saved up again I plan on getting some Precision 880cc injectors instead.

Yes, you would need a resistor box for DSM injectors.

Installing it is very simple... It is just a matter of splicing a few wires. Just knowing which wires you need to splice and where is all their is to it.

 

awesome thanks for the help and good luck

 

is there any way you can make your own resister box?

 

Yes, type in resistor box in the search box and you'll find everything u need to know. But i'll help ya this one time......You can go to radio shack and get the 10ohm resistors and wire them inline with the yellow/black colored wires from your injectors. I prefer using a reisitor box though.

 

thanks del_slowest

 

what if your running rc 370 sl in a obd1 integ do u need the box

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Del_Slowest &raquo;</TD></TR><TR><TD CLASS="quote">Yes, type in resistor box in the search box and you'll find everything u need to know. But i'll help ya this one time......You can go to radio shack and get the 10ohm resistors and wire them inline with the yellow/black colored wires from your injectors. I prefer using a reisitor box though. </TD></TR></TABLE>

10 watt 10ohm resistors to be exact. I also prefer to use the resistor box also just because it makes for a cleaner install.

liam

 

thanks for the correction liam. I always forget about the 10 watt part

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by ClubSiRacer &raquo;</TD></TR><TR><TD CLASS="quote">(Note my "Super Manifold" being used as an oil tee in the background.)</TD></TR></TABLE>

do you sponsor honda-tech? cause you sure plug that manifold an awful lot on here.

 

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

do you sponsor honda-tech? cause you sure plug that manifold an awful lot on here. </TD></TR></TABLE>

product placement to the extreme

why make a resistor box from radio shack when they only cost like $3.00 at the junkyard with wiring pigtail..

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by ClubSiRacer &raquo;</TD></TR><TR><TD CLASS="quote">The resistor box itself is simply four seperate high current resistors in a metal heat sink. They should typicaly measure 10-12 ohms.

</TD></TR></TABLE>

honda resister boxes measure ~6 ohms - anything in that range should work

 

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

why make a resistor box from radio shack when they only cost like $3.00 at the junkyard with wiring pigtail..</TD></TR></TABLE>

why go to the junk and risk getting dirty or mugged, when you can buy one from me for $35

 

or me for 25 shipped, haha

 

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

honda resister boxes measure ~6 ohms - anything in that range should work</TD></TR></TABLE>

If I remember correctly, mine was somewhere closer to 8-10ohm.

Resistor box &gt; make your own. Heatsink + Mounting bracket all in one owns resistors dangling everywhere.

 

I agree with ClubSiRacer. They are 10ohm resistors.

 

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

why go to the junk and risk getting dirty or mugged, when you can buy one from me for $35 </TD></TR></TABLE>

because that's a rip off when they only cost $3.00 to pull yourself with a pair of wire snips and a 10mm socket in 4 minutes or less at which time...if you get dirty you seriously need to reconsider working on cars haha

 

lol true, if ya don't wanna get dirty don't get involved with cars .

As for the resistor box for 35 bucks. I payed 25 for mine like two months ago and it was a steal. The same goes for the DSM injectors i bought, i got them for 50 bucks shipped. Of course a junk yard will let the resistor box go for cheap (they charged me 20 for the CRX one i'm selling) And the junkyard will let DSM injectors go for cheap. However it's the fact that you have to find one of these cars first. There were only 3 hondas with resistor boxes in em and 2 of them were gone from other ppl taking them. I also couldn't find a turbo dsm. the one i did find was stripped to the bone with only the DOHC valve cover laying on the ground. hence if you wanna look at all ur junkyards for this stuff go ahead you can save prolly 50%. However if you want it now then pay the 25 30 bucks for one.

 

lol!

or I could undercut the both of you and sell the resistor boxes for $15 since I can apparently get them a lot cheaper and they're plentiful at the two yards I visit

hell, there were 6 of each style honda resistor boxes at the south yard this past weekend and I only took two...

gotta luv the digital pimps pawnin their goods