Rb25 Greddy Manifold With Top Feed Injector

[-Jay-]

Hi everybody,

Hoping someone can help me out.

I'll make it short, I have an rb25det greddy intake manifold, greddy top feed fuel rail (10.5mm) so I'm using OEM type injectors.

I've been looking round for which o-ring/seal I need for the bottom of the injectors that go into the manifold.

Have been told I need an aluminium pieces that sit where the side feed injectors usually sit, they have a little space then for a normal o-ring and top feed injector.

Any help appriciated, thanks lads

[-Jay-]

Well just in case anyone wants to know, when using nissan top feed injectors on this intake manifold you just need R32 GTR stock seals for the bottom of the injector and you're good to go. (Probably 33 & 34 also)

[Sydneykid]

My understanding is that Trust sell a top feed fuel rail and 6 alloy collars all together in a kit. Hi Octane have them for around $400, which seemed a bit steep, so I am currently casing Nengun to see what they can do. If the price is still too high, I have a spare standard GTR top feed rail and I will get the race machinist to lathe up some alloy collars for me.

Cheers

Gary

[Rezlo]

S14 SR20DET injector seals work, and the stock GTS-T injector seals work, the sealing section on the top feeds is the same diameter as side feeds, no need for anything fancy

[PSI Parts]

My understanding is that Trust sell a top feed fuel rail and 6 alloy collars all together in a kit. Hi Octane have them for around $400, which seemed a bit steep, so I am currently casing Nengun to see what they can do. If the price is still too high, I have a spare standard GTR top feed rail and I will get the race machinist to lathe up some alloy collars for me.

Why not get the 11.0mm fuel rail instead of the 10.5mm which will allow you to use a lot bigger range of injectors.

[SCR34M3R]

i got a greddy intake on my r34 using top feed injectors and i just used r33 injector coils and is all good