I searched the topic and didn't find what I was looking for. I know the injectors will fit, but do you have to get a new resistor box, and some guy was talking about boring out an O ring? Anyone know for sure if these are a simple plug and play or if there's more to it?

 

Im pretty sure all you need is new resisstor box that you gotta wire in and thats about it.

 

easiest way to mod the injector seals is grind the rubber out with the sanding drum looking tip in a dremel. it takes all of 5min and it's a little bit messy, but not bad.

 

this is a bit old, but I need to bring this back up top. anyone else do this?

 

They are simple plug and play. You keep the resistor box already in the car (assuming you have a 92-96) and just swap out the injectors. Even the injector clips are the same...

Just a warning, if you're planning a turbo setup 450's will not be big enough for anything more than about 6psi or so.....
Brian

 

6psi? got any evidence to back this up, causer i've heard up to 9-10psi

 

Hey firdrake,

Can you explain why only 6 psi?

I don't have a stand alone right now and still using the s-afc so i can't use anything larger then 450 right now.

Hear from you soon

rocco

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Firedrake &raquo;</TD></TR><TR><TD CLASS="quote">Just a warning, if you're planning a turbo setup 450's will not be big enough for anything more than about 6psi or so.....
Brian</TD></TR></TABLE>

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by b16hybridsol &raquo;</TD></TR><TR><TD CLASS="quote">6psi? got any evidence to back this up, causer i've heard up to 9-10psi</TD></TR></TABLE>

i was just talking to brian about this, he has a stock motor and was dyno tuning, he was running 55psi duel presure using DSM 450, and he ran out of injector, he was at 100% duty cycle when on the dyno, i don't know exactly what boost presure though

here is what brian had told me

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote &raquo;</TD></TR><TR><TD CLASS="quote">
Nobody seems to believe me when I tell them this for some reason DSM's do not make 300 whp on stock injectors, no way....
Go to http://www.rceng.com/technical.htm and put these #'s in their injector worksheet: 311 crank horsepower (so whp would be about 15% less), 4 injectors, .65 bsfc, 1 duty cycle (for 100%) and 55 psig fuel pressure......
Then look what size it says the injectors would be Yep, at 311 crank horsepower you'd be at 100% duty cycle on 472cc injectors, so 450's would be WAY overrun....
</TD></TR></TABLE>

 

I say 6 psi because an H22 at 6psi should be making approx. 220-230 whp or so which 450cc injectors can still support just fine (at a reasonable fuel pressure).....remember it's a horsepower thing and not a boost thing, so if you're making 8-9psi boost but only making 230 whp then 450's will still be ok (but hopefully that's not the case, it would suck)

b16hybridsol - Ask the people telling you 8-9 psi is OK to show you their dynos with 450's in the car......they'll either be making 220-230 whp or have dangerously high fuel pressures.

B-series motors are a different matter, because they only make 230ish whp at 8-9 psi, prelude motors make about 50 whp more at those same boost levels (woohoo displacement!). A lot of prelude guys get the impression from the B-series guys that they can run 450's as well, without thinking about the fact their motor at similar boost levels will make 20% more power......

rocco - How are you planning to tune the car? If you have a dyno with a wideband near by (there has to be a dyno somewhere in the netherlands?) just watch the fuel carefully and start with your fuel pressure at 60 psi....when you run out of injector it'll be obvious, because you won't be able to make the car run any richer without turning up fuel pressure......

Brian

 

Yo Brian,

I wish i could bring the car over to Solid to tune it together with you, but this isn't possible . Anyways i'm gonna go to Van Kronenburg they have tuned lots of very very fast cars and have a dyno. Don't know about if they have a wideband. but i think they do.

I'm gonna be running a Vortech 12:1 FMU, Walbro 255, 450cc DSM, S-afc for now, just to get it to the Drags here in March(hopefully shoot some video for you guys)I'm still running the stock fpr so i really don't know what the fuel pressure is gonna be yet.
Do you know the fuel pressure with this setup?? And where should i pay more attention to. I plan on boosting 12 psi when it's dyno tuned and all, but i'm worried about the fuel pressure now.

Sorry for jacking the thread
http://www.van-kronenburg.nl/Default.asp

 

hey firedrake, yah, I remember seeing one of your posts and you maxed out quite quickly with 450's. At the moment, I am planning on using these dsm injectors that I have and I plan on sticking with my 7 psi spring in my wastegate. I dynoed last time at 7.5 psi and didn't want to go any higher until I got my internals done, so that's my plan. My last setup consisted of stock 340 injectors, an fmu (5:1) and an inline pump. My new setup will include the same wastegate set to 7 psi using stock fuel rail with dsm injectors and uberdata as my engine management.

When you say direct swap of injectors, do they even use the same rings in the fuel rail and in the intake manifold?

Thanks again for the help!

 

its very tight, but you can put the injectors in without boring th orings out, i just did it, but i think i'm going to turn around and sell my dsms, cause i'm lookin for like 270-280ish whp about 9-10 lbs. thanks for the info firedrake

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by b16hybridsol &raquo;</TD></TR><TR><TD CLASS="quote">its very tight, but you can put the injectors in without boring th orings out, i just did it, but i think i'm going to turn around and sell my dsms, cause i'm lookin for like 270-280ish whp about 9-10 lbs. thanks for the info firedrake</TD></TR></TABLE>

yeah I think I might have to sell mine too.

 

i have a set of 680's out of an old rx-7, will i need a new resistor box for those, and how much power would these be good to?
thanks
daniel

 

i'm pretty sure those are saturated

 

so would they need the resistor box then? i have one in there already, would that one work, or do i not need the box?
daniel