REnder

can some one please tell me what the part numbershould be on a set of RC engineering 750 injector?

I bought a set a long time ago and didn't really look at them untill today when I finally got to that stage of reassmebling my engine. the part number on my injectors is sl4 750 and if thats the right number could some one tell me who there supose to be installed. they look similar to the stock injectors but a little shorter.


Thank you

TRRAPLN

I have SL4-750 injectors for my 1988 S4 turbo.
They appear to be the correct, however several issues came up when I installed them.
1. Make sure the electrical connector is right. They ground off a locating rib on the electrical connector to fit the s4.
2. The injector tip is different and does not provide a tight fit to the sealing donuts. I called them on this and they said that the seal is created by the injector body face pressing against the donut, (face seal). The loose fit of the donut ID does not appear to be a problem if you can get the injectors to press down all the way.
3. The injector body is larger in diameter and acutally hits the cast web between the mounting holes. I had to grind the web to get enough clearance so the injector body didn't hit the web.

They are installed and no leaks.

REnder

thank you that is perfect.

bacek

HA! i cant believe i made it into a sig!

REnder

.ynkeetratr, so what seals did you use? did you reuse the seals off of the old injectors or did you buy new ones and if you bought new ones where didyou get them?


I want to make sure I do this right the first time.

it was just too funny

REnder

the guy i bought the injectors off of sent me some seals but when he shipped it he didn't bother to put the seals in a bag so I think some of them might have fallen out of thebox so I was wondering if you could use the seals from the old injectors or if I should buy new ones?

StarScreaM2k1

i got a set for my 10AE and they were 720's and High Imp too! i was like OMG no resistor **** needed I like it was like SLX-720 or something like that.

TRRAPLN

[QUOTE=REnder].ynkeetratr, so what seals did you use? did you reuse the seals off of the old injectors or did you buy new ones and if you bought new ones where didyou get them?


I want to make sure I do this right the first time.




You can purchase the o-rings for the top and donuts for the bottom from Mazdatrix. If the seals are stock or very old, I would replace them. You don't want a vacuum leak after all your work.