Whats The G.o With Injectors?

[DECIM8]

Hey guys,

Ive been scrolling the forums for infomation directly about Injectors but not much is about the differences with them.

Its pretty obvious the more CC, the more fuel they squirt and the higher you go, the more HP you will be aiming for.

Im looking for R34 Replacements for a GTT to power a highflow so I dont really need a massive injector, I wont be running crazy boost so really only want to run a 555 or 700ish set incase I want to eventually update the R34 turbo.

Ive seen HKS, Nismo, Sard, Blitz and so on, is there really a difference in quality with those jap brands? Why is Sard more expensive than Nismo?

Finally what should I get? most people go with nismo from what I find any reason for that?

Thanks

[NYTSKY]

Mate get Nismo,straight drop in no dramas,i believe you need collars for the Sard ones.

[dmr]

GTR 440cc or S15 480cc will do you fine.

[SLED]

GTR 440cc or S15 480cc will do you fine.

I've just upgraded mine for bigger ones so make a reasonable offer if you get stuck.

[The Mafia]

I have nismo 555cc. They are a 4 hole and have a almost perfect spray pattern.

Sards need collars and if the collars aren't fitted properly they can leak.

Get drop in nismos, they are better.

[DECIM8]

Can I run the same injectors you guys do on 33s? I believe 34s run top feed or somthing?

http://www.ooparts-international.co.jp/ind...d/hks/injector/

Edited February 12, 2008 by DECIM8

[darrinspencer]

No r33 are side feed, R34 are top feed

You can not use gtr or s15 injectors as suggested.

I have just fitted some blitz 525cc in my neo stagea. Have had it tuned 2 weeks ago with a power FC. Works great

$699 set from slide. I got mine thru greenline cost me under $600 del.

They come with new plugs, but they are not needed. I had to get new o rings from a mobile injector guy ($20 on a sunday) to suit the fuel rail. Pretty sure the 350z uses the same type of injector, that's why the plugs and the wrong o rings supplied with them. The injectors are approx 8mm longer than the standard ones and need to get the 2 supplied spacers from blitz which lifts the fuel rail up.

The nismo might be a better fit but cost $200 more.

Attached is a photo from yahoo auctions, which shows the alloy spacers and new o rings needed

[DECIM8]

Well ive investigated a few options, Seems Nismo only make a 480CC compatable with the ER34.

For my application of highflow turbo, perhaps at most 240-250rwkw would this be enough flow? I would assume so but need confirmation.

Ive also decided to bring in a HKS fuel pump capable of 250L a hour ( i read the same pump for a 240sx was rated at 165psi??), I would assume it would not suffer leaning out from higher boost PSI as its HKS (it is also direct drop in like tomei) can anyone confirm as I cannot find statistics on its claims (I would assume its underclaimed because its HKS)

My friend runs it on a R33 with no issues, anyone else?

Edited February 13, 2008 by DECIM8

[Tangles]

check out Deatschwerks in the states

they may do topfeed Rb25det injectors

[darrinspencer]

check out Deatschwerks in the states

they may do topfeed Rb25det injectors

They do, but why buy doggy high flowed s/hand injectors when you can get new Blitz injectors for the same money.

[eddieeeee-ro]

i thought gtr injectors are top feed aswell? u'd only need a resistor pack to install them ?

[sl33py]

My mechanic says that the Nismo and HKS injectors fire a finer mist than say Sard or some of the others, so the fuel gets burnt more effectively. No evidence/backup though.

[The Mafia]

Thats because the Nismo Injectors are a 4 hole injector, the rest are a 2 hole.

4 Smaller holes will atomise the fuel better.

[darrinspencer]

Thats because the Nismo Injectors are a 4 hole injector, the rest are a 2 hole.

4 Smaller holes will atomise the fuel better.

The Biltz top feed NEO injectors are 4 hole as well

[DECIM8]

Alright then, Seems greenline are the cheapest option but dont sell nismo.

Again ill just ask will 480cc be enough for my application? if stocks are handling 200kw I dont see why 480 wouldnt handle 250rwkw

[STATUS]

check out Deatschwerks in the states

they may do topfeed Rb25det injectors

forget the dodgy secondhandies... if you really want redrilled injectors get em done locally for ALOT LESS.

IN r34 BLITZ or NISMO are the go .

[LTHL34]

The Deatschwerks ones are great i have been using them for about 1 year now with no problem what so ever. if they are put in the right way you will not have a problem. Another good thing is that the std ecu can run them as well.

[Birnie]

Someone said GTR's were no good.

I'm sure they are fine, as they are top feed.

If 250rwkws is the aim, they should be fine...... and someone else said they had some for sale? Go for that !

[heller44]

different injector shape/length. it wouldn't be wise to be offering advice unless you were sure of the information..

[DECIM8]

Righto, Just hit up Nengun for 480CC injectors and a fuel pump.

Just need to spend up on a powerfc now.