Rx7 20b Injectors For Rb25det ?

[RB20DET_Silvia]

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.

- Luke

[Sydneykid]

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.

- 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.

cheers

[BHDave]

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.

[sinistaGTR]

yeh there the same as s6 injectors if you get the secondary ones there 850cc.....

[paulr33]

yeah some rotaries have primary and secondary injector sizes like sk said

[Don Dada]

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.

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.

[Parag0n]

Don't know about the 20B but you should be able to find some 850cc secondarys from a FD on ausrotary in decent condition.

[DaGr81]

Are they low or high impedence though?

[Don Dada]

high imp.

[discopotato03]

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]

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????