what to use as lower injector seal/grommet?
 

as stated.... i am about to install my id1000 and when i removed my old injectors i noticed that my injector diffusers where a mess....broken and all!
so i removed em, but now i need to build up the space they took so that i will have a tight fit for my id1000's. i will not install new diffusers.
how would you do it?
use like 3 rubber grommets?
make an aluminum spacer with 1 grommet on each side?
just cut a piece of silicone hose (like 2mm to long and let the injector squeeze it)

is there a min/max preassure the injector can accept?

i used silicon hose as grommets on my stock injectors after a vacuum leak and it worked great but now they will be 3 times longer so dont know if it would work?

the car is a s4 t-2

Your ID injectors should have come with cups that the injector rests in, find and use those.

Here is a link to where FFE sells them: Lower O-Ring Inserts | Full Function Engineering

do they replace the diffusors?

Yes, diffusers aren't really needed with the new style injectors.

ordered!

Just for info , you can alao do as I did , just cut off the lower part of the stock primary rail ! about and inch from the end , it fits perfectly in the centre iron and the injectors fit perfectly into it and its free.

I can't picture what you're sayin here
 

Say what? And use it as a spacer in the injector hole after the diffuser has been removed?

do you have a pic for this?

Yes , thats what I am using and it fits PERFECTLY , afterall the lower rail was made to fit into the bores in the center plate..........no pics though , sorry.

Guys.,,he has a S4 TII not an FD.

^^ I also did this and it works well.

That sounds kinda ghetto, why hack up the primary rail just to save spending $15 on a part that is also designed for its purpose and won't need additional spacers?? I can see doing it if you're unable to get the cup designed for the new style injectors, but just to save a buck...?


The lower cup is universal for 13B's, so it will work regardless of FC/FD. The top hats will differ, however, depending on fuel rail height.

I'm sorry ! didnt know it would be seen as gheto , its just that we have a bad habit of improvising here rather tha buying a "kit" for everything ! My Bad.

Really !!!!!!!!!!!!!!!!!!!

https://www.rx7club.com/build-thread...-last-1004921/

Just for info and a warning ! DONT EVER BUY INJECTORS FROM FIVE O MOTORSPORTS !!!