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Fitting 550cc Supra 2jz turbo injectors into a RB25det

Guest darrinspencer

By Guest darrinspencer,
in Engines & Forced Induction

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Guest darrinspencer

Guest darrinspencer

Posted
Posted

I am looking into the "posibility" of fitting Toyota Supra IV twin turbo USA spec 550cc injectors into a RB25det.

Japanese spec are 480cc.

The injectors are low impedence, but RB25 use high impendence

Is there some way of re-wiring etc to get these to work?

Will they fit into the fuel rail with little to no mods?

I have a new Wolf plug-in ecu, which is not fitted yet, will this be able to run low impedence injectors instead of high impedence?

These injectors can be found for about $150 aust., hense the consideration in finding out if these will work

Has anyone tried these?

Attached is a photo of what they look like the blue set of six

Also attached is a photo of nismo 555cc injectors, just to compare

Chris32 Veteran

Chris32

Posted
Posted

Dunno if they would fit, they look alot like RB25 injectors though

If they are low impedence, you could wire in a GTR resistor pack and it should work fine

Chris

Guest darrinspencer

Guest darrinspencer

Posted
Posted
They look too large at the base to fit in the RB25 rail. Have you looked into 550cc 20B cosmo injectors?

I have, but they are hard to get and are nearly as dear as buying s/hand Sard etc rb25 injectors, also the WRX boys want them

N I B Grand Master

N I B

Posted
Posted

Yes they will fit with a little effort and the wolf Plug in will drive them with no problem with out any need for a resitor. If you have any doubts email Wolf in Australia and say Steve thomas from SST told you the wolf will drive these injectors.

MonstaS4 Collaborator

MonstaS4

Posted
Posted
So are you using these in a RB25det?

If you are, what was needed to make these work.

Steve- thanks for the answer.

I'm using these in an RB30DET with the R33 head. I machined up some aluminum collars to locate them centrally in the bowl. A small amount of material needs to be removed from the bottom filter cage and aluminium tip so they will fit into the bottom of the bowl. Plugs are different. Rather than "cut and shut", i bought new terminals and plugs and re-crimped them.

They are high impedance (13 ohms i think).

Guest darrinspencer

Guest darrinspencer

Posted
Posted
I'm using these in an RB30DET with the R33 head. I machined up some aluminum collars to locate them centrally in the bowl. A small amount of material needs to be removed from the bottom filter cage and aluminium tip so they will fit into the bottom of the bowl. Plugs are different. Rather than "cut and shut", i bought new terminals and plugs and re-crimped them.

They are high impedance (13 ohms i think).

The US spec are low impedance.

What computer are you running?

MonstaS4 Collaborator

MonstaS4

Posted
Posted

I think we have a communication breakdown here.....

To clarify, I have 20B cosmo injectors which i sourced from dysons and a rotary forum. These are high impedance. I machined up collars to fit these in the r33 rail as i mentioned above. Computer is Haltech E11.

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