Ok.. finally figured out how to do the swap using DSM 450cc injectors to work in conjunction with late model Hondas. Several problems arised that weren't exactly "plug and play".

The clips on the injectors need to be slightly modified and the stock injector seals (for B18's) don't work with the DSM injectors.

*** DSM left, Stock right



*** DSM left, Stock right - notice the clips



*** stock B18 seal left - will not work



With the use of a custom resistor box and Hondata, they idle like silk - just like stock. And now duty cycle has dropped from 92% at WOT with 240cc to ~70%.

You can take a look at the Hondata datalog file here:

http://www.c-speedracing.com/temp/12-27-2001-05.rec


More info on the injector swap to come. Enjoy!

 

ttt

 

keep us posted on the specifics about the injector swap...I plan on doing this as well.

 

Why would you run shitsubishi injectors? DMS's are the devil.


(before i get flamed, the above statement was a joke)

 

They are cheap as hell compared to $300 RC's. You could probably find DSM's for 40-50 bucks. Basically, a cheaper way for me to run lower fuel pressure.

 

Ya.. very inexpensive.. and 95% plug and play. We are now able to run ~70% duty cycle and fuel pressure is now stock (44psi) instead of 62psi that we were running.

Hondata makes the whole process a snap as well. Click a few buttons and your program is modified for the new injectors.

 

can't wait for the write up of the install.. excellent site you guys have..

 

Thanks.. stay tuned.

 

What are you talking about?
I have installed many sets of DSM injectors with *0* fitment problems
whatsoever. And a custom resistor box isnt necessary. Any
box from an 88-96 honda will work.

You are making this out to be a much bigger deal than it
actually is.

 

Ohh really???? So your telling me, that I actually didn't use DSM 450cc injectors, and that they really should have fit with no problems and that i could have bought a 88-96 resistor box???

You honestly think i'm that stupid??? Please.

I'll try to explain this better for you. Those are DSM 450cc injectors from a 97 GSX. Thats an Turbo Eclipse in case you didn't catch that.

The Honda injectors clips on the harness were OBDI clips. The Honda injector pictured is a stock GSR 240cc injector that is High Impedance. You following me so far?

In case its not clear in the photo, the DSM injector is fatter in the nozzle end than the OEM injector. Need me to draw some arrows for you? Therefore the stock B18 family of seals that go into the intake manifold, do not work with the DSM injectors. Hmmmm thats a hard one to follow.

So.. i'm smoking crack here and the OBDI clips should fit perfectly on the DSM injectors and the OEM seals should have fit over them as well. Man, I thought I was pretty good at putting cubes into round holes, but I guess i'm not.

And one more thing.. "custom resistor box" doesn't imply that you need a 'custom' box.. it means that i am NOT using a factory honda resistor box. Didn't think that was too difficult to understand.

 

Oh one more thing.. if you look carefully at the second photo, you'll also notice that the injector on the left (yes, its a DSM 450cc injector shown there <insert sarcasm&gt There is a boss/tab that is in the bottom of the socket between the two prongs... notice there isn't a boss on the OEM injector. This boss interferes with the OEM OBDI honda clips. So obviously something needs to be modified.

Man... you HONESTLY think I am that stupid?????????

Perhaps, there are plug and play senarios with certain DSM injectors.. maybe the 1st gen ones... but obviosuly in this case, it is not.

 

Yep, they look just like all the other 1g/2g injectors I have been using.

You need to relax.

 

Hmm If thats the case, then please share your knowledge. What are you doing differently?

 

Its probably the injector clips. All of the cars I work on have GM clips.

Otherwise they are bolt in. The injector slides right into the rubber grommet.
For me they fit more or less like they were meant to be there.

 

Hmm I see.. .well that resolves the issue of the clips fitting or not. If you use Honda clips, they will not fit without modifying the injector socket.

As for the gromets, thats odd that they 'slid right in'. The inside diameter of the OEM seals are slightly too small fit around the DSM injector body. If you do decide to use the honda seals, the injector will still seal but the injector tip will not stick out beyond the height of the grommet, therefore making sit farther away from the intake manifold. At the same time, it makes the fuel rail sit farther away from the manifold as well.

Therefore, you need to use the thinner civic si(r) seal so the DSM injector will sit in the factory location and the tip will still protrude into the intake manifold.

 

my favorite line right there

 

fwiw, steve knows his sheit (but then we already knew that)...

He puts me in my place all the time.

Anyway g3teg, please post more info or another how-to on your site... This would be very interesting for those of use with itr's... How would this differe from the -00-01 itr's as well?

Thanks! and to all...

 

ok.. and you think crescent DOESN'T know his?!?! umm.. your sadly mistaken..

 

WHAT?! Mr. Bojangles, where is this coming from? You need to reread my post!

 

Yea, that injector in the picture is definately a 450cc injector pulled from a 2g Turbo model eclipse (regarless of GST or GSX as they both ahve the same injectors). I should know as I just swapped mine yesterday with 625cc's so yea that's it. The 1g Turbo model eclipses came with 2 types of injectors. 440cc's for the manual's and 350 (or something similar) for the automatics.

So have you Honda guys known all along that these injectors are a drop in thing or has this just started now? Just curious

 

would the 1g dsm turbo injectors be better to use on a obd1 gsr?

btw you have the most informative posts of almost anyone on the board.

 

Was that directed towards me? Or was that sarcasm

O well, anyway, the 1g injectors are exactly the same as the 2g as far as injector shape itself and resistance within the injector. If I am not mistaken they are the same as far as the clip is concerned also, but I can find out within a day and I'll let you guys know.

 

Seems to be a new thing for some, but a lot of us have been using them for years.

Of course, now that we have more affordable engine management, they will
become more widely used i think.

 

no that was for G3TEG,hes always got informative posts.you know good real world posts for the common man

 

Thanks for the comments and compliments Much appreciated... however this thread is getting a little out of hand...

Just wanted to give a heads up and be sure people are aware of whats (potentially) involved in using DSM injectors.

If it was truly plug and play 100% of the time, then there wouldn't have been a reason for this post. That's all....

Stay tuned...