Hey guys,
Im currently installing my TN kit this weekend and got a set of used RC 440cc injectors for my car. when installing them today, it seems the injectors sit up higher than the stock ones causing the fuel rails to be raised about a half inch. I put spacers to allow the fuel rail to sit higher but now I cant install the lower plenum back because its hitting the fuel rails. Is anyone else having this problem with their RC injectors? after all this, im beginning to question if these are for the g35/350z. the fat part of the injectors sit on top of the "injector hole" but doesnt seem to go all the way down as far as it can. this really sucks for me as I need this for the turbo install. any advice is appreciated.

 

You can get a spacer from importpartspro for the cosworth plenum or stack a few more gaskets on top of each other...but that doesn't seem to safe

 

its not that i need a spacer. Its the fact that the fuel rails are hitting the lower plenum when I go to put it back on the runners. This causes a huge (1/2") gap between the lower plenum and the runners underneath which isn't safe at all. I don't need spacers.. I need something to lower my injectors and fuel rails. Someone that changed their injectors with RC's please chime in!

 

it really sounds like you need the spacer - that will effectively raise the height of the lower collector so bottom of the plenum will clear your rails. can you take some pix of the issue...perhaps we're all missing something.

 

Do you have a picture? This could easily be improper installation related to wrong injector or something simple.

 

I have RC 440 injectors with no spacer or other changes from the stock setup.

 

yeah, sorry I misinterpreted Nickk6 comment earlier about the spacer for the lower intake plenum. That would be the only way but I don't think that would be a good idea either. These should fit without any type of special spacers. I will just be returning them I guess. Sorry I have no pictures but I installed another set of denso 380cc injectors and they fit fine. I don't think these are correct. Thanks guys. Now I have to find a set of 550cc+ to compensate for the turbo. 380's will be a temp job.

 

http://www.my350z.com/forum/engine/4...injectors.html

 

Not sure about RC, but my DW 440's dropped right in. No mods/spacers needed.

 

stock rails were shaved down

https://g35driver.com/forums/forced-...er-plenum.html

 

So some of the RC 440's fit and some dont. Anyone have any idea why this is?? I'm supposed to be installing a set thursday for a tune session on friday and would hate to get the car apart and these not fit

 

Not sure why you think a spacer would be a bad idea. At least 95% of the guys running over 500whp run an intake spacer to clear the bigger injectors.

 

Where can I find this spacer? Does anyone have a link? Need to order today!!!!

 

Well the RC injectors are definitely to long for a 07 coupe. Goldies actually. There exactly as the original posted said. So now the cars sitting till we can get a spacer. Makes me think the rails are different for the earlier models since the one peron who said they fit was a 03. CRAP! Goldie was told by 2 different vendors that the injectors would fit no problem, not sure who though. So went ahead and redid the harness for them before hand to get the hardest part over with.

 

Motordyne and injectedperformance have spacer kits. I have to run a spacer.