What 550cc Injectors should I go for?

[R31Nismoid]

Ah, RB20, no worries... if it was RB25 - i'd have something to say

lol

[RNS11Z]

gigolo: rough idle at times, wouldnt idle below 900rpm slight hesitation below 1500rpm when you gave it a bootful

[R31Nismoid]

my 740cc nismo's idle perfect.

no dramas anywhere

[Busky2k]

Going by some quick research, so long as you have quad pintle injectors like HKS/Nismo/Apexi then you should have zero problems with idle and fuel economy. It seems the RX7 and SARD injectors are the non-DOHC friendly types and thus you get what you pay for. It seems people with SR20s have had no problems with 740cc quad pintles!

[Fitzpatrick Speed Works]

joel mate rx7 ones are fine the spray is pretty much a stream as you say but this is due to the pinttle cap hole being to narrow you need to use toyota ones and drill them out slightly but the patter is quite narrow as opposed to your nismo quad pinttle varieties, but 550cc is small so the differences will be quite small....Also some of the earlier rx7 injectors will actually require you to bore the hole in your head slightly larger so be carefull what you buy if you go down that route. Personally i could never pay the ridiculous prices asked for by the jap brand injectors its bloody daylight robbery.. i use holley injectors in my car (110lbs= 1180cc Units), cause they are cheap, never fail, and alot of the product range is designed for methonol so the seals are alot higher grade but you will not get you your misty spray with these they are pretty savage but very effective!!!!

[discopotato03]

I have not looked too far into injectors yet , by four pintle do you mean four hole like the Rochester injectors ? Are these the disc style rather than pintle or needle valve type injector .

Cheers A .

[Fitzpatrick Speed Works]

the rochesters are the same as the holly design they have holes that seperate the spray to give a finer spray pattern but are still single needle or pintle design i will post a pic of the design!!!

[Fitzpatrick Speed Works]

pics of injectors!!!

[Cubes]

This has turned out to be an interesting thread.. Thanks ppls.

[someonestolecc]

Are there any aussie injectors worth considering over 550cc?

[Interloper]

Hi Joel, I have a set of 555cc nismo injectors in my RB20. I actually had them checked for flow before i installed them and the results showed that they all flowed Exactly the same amount - 600cc. So yeah, im happy with them but i can't comment on fuel economy as i had a bigger turbo and stuff put on at the same time

[Cubes]

Generally bigger turbo's under normal driving conditions result in better fuel economy as you tend to be on boost less.

Note the normal driving conditions.

Has the fuel consumption changed dramatically even with the mods or?!?

[INASNT]

I am lucky to get 300km/h to a tank now with 550cc injectors and GT30 turbo, and thats driving to work and back everyday when my car rarely sees over 80km/h or 4000rpm

[Cubes]

Inasnt,

Your running the SARD arn't you.

I do remember Steve complaining about the fuel consumption. He also had SARD.

[INASNT]

Yep sards

[Interloper]

Generally bigger turbo's under normal driving conditions result in better fuel economy as you tend to be on boost less.  

 

Note the normal driving conditions.

 

Has the fuel consumption changed dramatically even with the mods or?!?

Fuel consumption has got a lot better now that i'm running the stock ecu chipped, especially for highway cruising compared with the microtech that i previously had.

[whatsisname]

I am lucky to get 300km/h to a tank now with 550cc injectors and GT30 turbo, and thats driving to work and back everyday when my car rarely sees over 80km/h or 4000rpm

One shot at "300km/h" per tank... nice effort mate

[macka]

LOL above

Hey I have YELLOW 555s

Can the colour give an indication on what injectors i may have cause i have no idea

Cheers

[INASNT]

One shot at "300km/h" per tank... nice effort mate

DOH!! typo!!

300 km / tank that was meant to read!!!!

[Interloper]

LOL above

Hey I have YELLOW 555s

Can the colour give an indication on what injectors i may have cause i have no idea

Cheers

Well they won't be nismo ones because they are pink, so i dunno....