Jump to content
SAU Community

Rx7 20b Injectors For Rb25det ?

RB20DET_Silvia
 Share

Recommended Posts

RB20DET_Silvia Collaborator

RB20DET_Silvia

Posted
Posted

Howdy people,

Posting up for a mate.......he can get his hands on some 20 Injectors cheap which are side feed like RB25's and we are wondering if anyone has done this mod before....success / what needs to be done etc....

The standard 20B injectors are 550cc, thats all i know im unsure if they will fit in rail etc?

Any info would be handy. :rofl:

- Luke

Link to comment
https://www.sau.com.au/forums/topic/162358-rx7-20b-injectors-for-rb25det/
Share on other sites
Sydneykid Grand Master

Sydneykid

Posted
Posted
Howdy people,

Posting up for a mate.......he can get his hands on some 20 Injectors cheap which are side feed like RB25's and we are wondering if anyone has done this mod before....success / what needs to be done etc....

The standard 20B injectors are 550cc, thats all i know im unsure if they will fit in rail etc?

Any info would be handy. :happy:

- Luke

From memory (it's been a while since I had a set) the 20B injectors are the same as 1JZ & 2JZ, so they need adaptor rings, same as aftermarket SARD injectors. You can buy them separately anyway, so if the 20B injectorrs are cheap enough, grab them. Be careful though, I think they have 3 injectors at around 370 cc's and 3 at 550 cc's. Not all six flow the same.

:P cheers :huh:

BHDave Grand Master

BHDave

Posted
Posted

As sk said, they are pretty much the same as sards.

You need the collars, and some standard denso type plugs and shave a bit off some of the plastic down at the bottom of the injector.

They work in mine.

  • 2 years later...
Don Dada Mentor

Don Dada

Posted
Posted
From memory (it's been a while since I had a set) the 20B injectors are the same as 1JZ & 2JZ, so they need adaptor rings, same as aftermarket SARD injectors. You can buy them separately anyway, so if the 20B injectorrs are cheap enough, grab them. Be careful though, I think they have 3 injectors at around 370 cc's and 3 at 550 cc's. Not all six flow the same.

:P cheers :(

Anyone know exactly what collars are needed to fit the 13B side feed into the 25 rail?

Does it have to be sard or are there any other options?

Also i see sard has two different sized collars... one for the the 550 and one for the 850.

Thanks.

discopotato03 Grand Master

discopotato03

Posted
Posted

If you do a search you'll find lots of info on RX7 Turbo injectors .

From what I read it gets a bit confusing because the colour and even part numbers can be similar /same , it seems to depend on the model year of the donor engine .

I think the only hard and fast rule - with the conventional looking rectangular connector type , is that the locating tag on top of the fitting is offset to the right with high impedance injectors and center with low impedance peak and hold type injectors .

People say you simply file that tag off the high impedance injector and fit readily available std rectangular plugs .

Cheers A .

Don Dada Mentor

Don Dada

Posted
Posted

Ok guys after doing some research it seems like the Subaru STI side feed yellow top injectors can work on the 25det

Alot of Sr20 guys are doing the swap and says it fits as oem in the rail, are high imp,and just the connectors are different.

The problem is a little confusion over the USDM which claims their own is 550cc or thereabouts and the JDM spec which is 440cc

If this is true i can't believe there is no info on SAU to support this...... yes i've searched!!!

Anyone have any further info on this????

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
 Share
Go to topic listing


  • Similar Content

  • Latest Posts

    • Dose Pipe Sutututu
      S1 rb25/s14 starting problem

      By Dose Pipe Sutututu · Posted

      When you crank your car, and hit it with a timing light, can you see a steady crank timing?
    • PranK
      My BMW E39 528i touring

      By PranK · Posted

      Oh, forgot to add, A few months ago I was getting mixture codes and the car was using crap loads of fuel. You could smell the unburned fuel in the exhaust, it was crazy strong. Economy was over 17.5 l/100 and usually around 19. I smoked the engine and found a leaky CCV hose which I replaced and then I replaced my two pre cat O2 sensors, I also replaced the MAF. This fixed my mixture codes and improved my exonomy but I'm still 14 - 15 l/100 when pottering about town so something is still amiss. Throttle response is much better and it has more pep but I'd like to know why it's still so thirsty (and I'm hoping that whatever it is gives me a bit more poke).    
    • 25zenki
      S1 rb25/s14 starting problem

      By 25zenki · Posted

      Car is on factory injectors/z32 maf/ q45 throttle body/ z32 ecu with nistune 
    • 25zenki
      S1 rb25/s14 starting problem

      By 25zenki · Posted

      Hello all, currently finishing up a rb25 swap into my s14. Having issues with starting, car has spark (confirmed by pulling a plug and watching it spark), has fuel(confirmed by checking pulse/voltage at injectors all spark plugs are soaked in fuel). Car cranks over and pops into the exhaust with a heavy fuel smell but no attempt to start or run, I have torn the timing cover off and triple confirmed timing, turned the CAS in multiple spots both directions, attempted to start with coolant temp and maf unplugged, checked my fuel lines and made sure they weren’t backwards, checked voltage at cas/injectors/coilpacks, made sure all the grounds in the harness are connected and added a few grounding straps (1 from chassis to block, 1 from chassis to head, and 1 from chassis to igniter chip) I am getting stumped here. As a last ditch effort I made a full grounding harness tonight that’s going to run from the battery and add an extra ground from the battery onto the coil pack harness/igniter chip/ intake manifold/ Wiring specialties harness ground/ and alternator. I’m hoping maybe the grounding harness will fix it here but posting here to see if anyone has any other ideas on what else I can check. My fuel pressure is unknown right gauge will be here tomorrow.  IMG_3206.mov
    • CRSKmD
      R32 Sedan - Grip and Drift (have my cake and eat it too build)

      By CRSKmD · Posted

      yeah I was shocked when I checked my spare OEM on and as below that's how they come from Nissan. (side interesting note new NEO gearbox and replacement park lack the brass bush on the tips and its just all alloy) unsure about damage to the box currently back at 1110 to be pulled down/inspected and selector fork replaced as he built it previously and given the never before seen failure on his billet forks he is replacing it under warranty. He said he has used always OEM the keyway tab without issue for years so it could be an unlucky coincidence. I did talk to him about the sharp corners and stress concentration too. Re: hard shifts i got 7+ years out of the OEM one and the fork itself failed not the keyway. so could be bad luck as I said or an age thing + heat cycles in box and during fabrication of billet?
×
×
  • Create New...