Hey I just picked up a set of dsm 390cc turbo auto injectors tonight. I believe that are all the specs dont say you are an idiot if something in that is wrong just let me know. But anyway I am planning on going zc turbo very soon. My friend had these injectors on his obd1 car and my crx is obd0. Does that make a difference or will they plug right in like his did. What will I have to do to install them? thanks guys

 

the DSM 390 and 450cc injectors are Low impedance peak and hold injectors. only the NON-turbo talon/eclipse/laser injectors (290cc) are high impedance. they don't differentiate by OBDs like Honda kind of does.

anyway the only thing needed to run DSM 390s in an 88-91 civic (assuming you already have MPFI AND you are running OBD0) is:
-the injectors themselves
-and a little time to open up the seals that the injectors sit in (bottom of fuel injectors). you can just open the seals up with a razor blade or dremel and that's it. the injectors are low impedance and because of this they plug right into the stock civic wiring harness. and YES you should be using an injector resistor box with these.

i'm running 390s right now myself.

also here's a good link if you haven't seen it yet.
http://www.thedropshop.tv/vafc.htm

hth, Jason

EDIT: turbo DSM injectors are Peak and Hold, not saturated on me


Modified by sleeper4dr at 1:17 AM 6/11/2003


Modified by sleeper4dr at 1:17 AM 6/11/2003

 

hey thanks the car is a 88 crx si with a zc swap so basically all i need is to open the seals? I dont know what that means really, but wouldnt it have already been done since my friend ran them in his sohc vtec civic?

 

so with these injectors, an apexi safc, and walbro fuel pump should do the trick for all fuel and timing then it is off to safe boosting?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Si2See &raquo;</TD></TR><TR><TD CLASS="quote">hey thanks the car is a 88 crx si with a zc swap so basically all i need is to open the seals? I dont know what that means really, but wouldnt it have already been done since my friend ran them in his sohc vtec civic?</TD></TR></TABLE>

by "open the seals" i mean that the DSM injectors are a bit larger all around than the stock honda injectors so you have to remove some of the inner part of the seal in order for the DSM injectors to fit properly inside the seal.

pull a stock 240 and then pull the seal below the injector in the intake manifold and try to fit your DSM injector through the seal. you will see what i mean.. it won't fit. opening up the inner diameter of the seals is not optional.

 

whats the most accurate way of opening up the seals without cutting up too much or cutting the inner side of the seal unevenly?

 

you actually don't have to worry too much about how perfectly you open up the seals. the seals have nothing to do with your fuel pressure as they are really just there to position the injector in the intake manifold and keep things out.

it took a while, but when i was doing my own seals i would just cut out a bit from the seal and then test it with an injector. basically i would cut a bit out with a razor until it looked like i was close, then i would use a dremel to smooth it out. you want the injectors to fit snugly in the seals so don't over do it.

 

any pics of this? i have never had to mess with injectors before so thats why i dont understand

 

no i dont have pictures but it is like i said. if you pulled the OE seal from your intake manifold and tried to stick a DSM injector into it, you would see what i mean. the seals just have to be opened up to fit the larger injector. it's quite easy to figure out and do.

 

ok thanks a lot for all the help

 

you can do the shittiest job in the world enlarging those gromets and they will still work just fine