Gtr Rb26 Fuel Return Damper ?

[SiR_RB]

I noticed under my plenum I have a brass thing which has a hard fuel supply line and next to it is a brass round thing looks like a fuel damper or regulator?

What's it there for? My engine originally came out of an r33 gtr before been built, I've seen many 32 gtr's and they don't have this under neath the plenum?

Haven't seen any other 33 gtr's so can't see if they have it or not

I wouldn't mind removing it as I'm gonna run new fuel hoses to the engine

Thanks

[SiR_RB]

You see the fuel return hose coming off it

What is it and do I need it??

[KiwiRS4T]

Its a damper to control pulsations in fuel pressure as the injectors open and close.

Quote:
Without an FPD the fuel pressure will fluctuate (at a frequency higher than your fuel pressure gauge is capable of displaying). If the fuel pressure is fluctuating everytime the injectors open and close then they are not metering fuel as accurately as they could be.

But others say I've binned mine and the car runs fine.

I've still got mine and my car runs fine too.

Do you need one? No idea!

[89CAL]

Just keep it. If it aint broke, dont fix it and all that

Nissan put it there for a reason, its not causing an issue, may as well keep it on there

[SiR_RB]

I find it strange that the 32 gtr's do not have this but the 33 gtr's do !

[GTSBoy]

Why would you find that strange? Earlier car doesn't have something.....later car does. Obviously someone at Nissan thought there was a problem with RB26 fuel rail pressure fluctuation that they could fix by adding a damper.

If it were the other way around, you might be a little more justified in thinking it strange.

[blue_vl_t]

R32 Gtr has this, except its in the fuel tank, I believe we are talking about the same thing.

[SiR_RB]

My r32 gtr had this in the supply line in the fuel tank, we had a fuel supply issue when tuning, removed it, and that solved our problem

I guess I will leave the one under the plenum connected

Thanks