We all know using DSM 450cc injectors is a cost effective alternative to RC injectors. However, most people have problems installing them due to the the larger physical size of the DSM injectors. Some choose to bore out the stock bottom seals and some choose to the force fit method. Some say the injectors should sit flush to the seal, and some say it shouldn't. Well, I'm hoping the information that I'm about to share will help a little. Certain information may or may not apply to your setup type but I'm sure you'll get the idea.

1. Injectors seals: Napa sells an injector seal kit that contains seals for Civics and Integras. Because I have a Civic, the taller Integra seal works out perfect for me! If you don't need the complete seal kit, just go to Acura and buy only the bottom seal, or try to find some taller seals that have the same outside dia.


2. Bore out the bottom seals: I find it much easier to bore out the seals with a Dremel and do it in the manifold. I simply use a stock manifold that I have sitting around and use it to hold the seals. It only takes seconds to bore each seal!


3. Finished product: If done properly (which is extremely easy), it will look like stock.


4. Injector tip protruding distance: This is the good part. With the properly selected bottom seals, the injector tip protruding distance in the manifold can be the same as stock and still allows the injectors to sit flush on the seals! Btw, the injectors should go on the seals with slight friction.

Stock injectors with seal.


DSM injectors with taller seal.


5. Installed DSM injectors: The injectors fit very nicely in the JRSC intake manifold with the taller seals.


Here's a closeup, nice and flush!

 

Nice write up

 

Good **** bro!

 

good info

 

 

very awesome

 

Thanks for takin the time to do that.

 

 

Nice install!

Oh, and thank you! This is very helpful and informative. What about the size of the stone on the Dremel tool. Is it the standard size that comes with the Dremel?


[Modified by Evil Beaver, 9:54 PM 1/27/2003]

 

Strippers for JT!

Sonny

 

About a year ago when I got my Hondata and DSM 450s, I purchased the same injector seal kit. It works excellent. God job on the write up.

 

Thanks guys!

 

finally a good write up.. mind if we host this at my site?

http://www.homemadeturbo.com

let me know,

Jeff

 

Sure, go for it! The whole idea is to share informaiton.

 

nice pics and nice instructions
how do you guys hid the wiring for the resistor box so well??
also, where to get clips for those injectors?
i'm using some that work, but are kinda loose

 

are you saying the sanding drum is the perfect diameter for the injectors?

 

The injector body size that goes on the seal is .631" or 16.04mm. The sanding drum that I used is the standard accessory pack that came with the Dremel kit, which is .590" or 14.99mm. When the sanding drum is installed on the shaft and tighten down, the new dia is .608" or 15.45mm. That provides a nice friction fit after the seal is bored out. HTH...

 

Here ya go fellas.. I added a bit of info on the inline resistor install as well...

http://www.homemadeturbo.com/dsm.htm

Thanks JT,

Jeff Frank



[Modified by AbaZ, 8:27 AM 1/28/2003]

 

Just out of curiousity, does this write-up also apply to H22(A4)'s?

TIA

 

same as above... and would the same seal kit work on it..? p/n?

 

about time someone showed that!...thanks!!

 

on the write-up!
You can also double up the stock size seals, and it fits perfect also.
Someone else figured out the large dremmel drum bores perfect!

 

looks good

all i did to fit mine were use the same green o rings and some WD40 and press them in

 

Looks good!! I'll have to do that for my DSM's when I slap them on the teg!

 

I'm not sure about the p/n or seal size for the H22. However, just go down to a Napa store and ask for a seal kit for the H22, as well as the kit for the Civic/Integra (use p/n above). Put the seals from the two kits side by side and perhaps borrow a caliper from them to compare the outside dia and height. If they are the same, then you are set. Don't worry about the inside dia because it will be enlarged by the Dremel.