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Version 3/4 top feed conversion.


Westy177

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Hey guys picked up a set of v7 sti pink injectors off a rev d gtb at pick a part the other day as a budget fuel injector upgrade for my RS-B.

 

Since cars a version 3/4 I've heard the manifold on these is unique to the 1/2 5/6. frustrating since all the kits are only for 1/2 and 5/6 or its usdm stuff.

I emailed radium engineering about there set but said they will not fit oem injectors, not really interested in going with id1000's since im still on a vf30 nothing special.

What have you guys done or even better any links to a fuel rail kit or adapter etc I could run that will work?
Any advice or wisdom on the different version and manifolds would be awesome as well.

 

Cheers guys.

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Depends how much power you want but i have seen some builds close to 300kw running big side feeds. 

 

There are 650cc JECS side feeds on TM for a good price that would save a lot if hassle than going top feed. 

 

The only way to make radium kit work is to buy the upgraded rails that suit the late model v8+ sti's that are top feed from factory. And then use those rails with the mounting hardware from the v1-6 conversion kit. This is basically merging two of the products they do. I have a top feed conversion kit for sale as i am in the same boat, but i didnt find out that oem top feeds don't fit until the kit arrived here.

 

Awesome kit for big hp build though

Edited by ginganinja
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10 hours ago, ginganinja said:

Depends how much power you want but i have seen some builds close to 300kw running big side feeds. 

 

There are 650cc JECS side feeds on TM for a good price that would save a lot if hassle than going top feed. 

 

The only way to make radium kit work is to buy the upgraded rails that suit the late model v8+ sti's that are top feed from factory. And then use those rails with the mounting hardware from the v1-6 conversion kit. This is basically merging two of the products they do. I have a top feed conversion kit for sale as i am in the same boat, but i didnt find out that oem top feeds don't fit until the kit arrived here.

 

Awesome kit for big hp build though

I'll look into those jecs injectors. I hate side feeds because there a pain to fit and I always break them Haha. 

24 minutes ago, pl0x said:

I would have thought yellow side feeds will support more than what a vf30 can flow. So unless you are future proofing, stick with yellows.

 

These should fit, sell the other 2 and your pinks. https://www.trademe.co.nz/motors/car-parts-accessories/performance/other/listing-1745471863.htm?rsqid=79f83d2abe744097ba1e5dd1a017b24d

Um I already have flowed and cleaned by dtech yellows in my car. I've heard mixed stories about stock yellows not really willing to find out if the max out on a vf30 on the dyno. Plus I have these pinks so future proofing.

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You're right. They don't fit. Phase two injectors require an adapter of sorts to fit into phase 1 rails. I don't know what that adapter is or where you could acquire it. 

 

Truth be told, you're better off looking for a phase 1 bolt adapter to phase two and trying to get an entire factory fuel rail setup from a V8+ STi. 

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I've had 2 cars tuned with vf22 and yellows and neither run out of injector, both 220-230wkw range.

 

13 minutes ago, Dairusire said:

you're better off looking for a phase 1 bolt adapter to phase two and trying to get an entire factory fuel rail setup from a V8+ STi. 

If you are stuck on the factory top feed idea then yea, id try get factory top feed rails and make an adapter to bolt them to the phase 1 manifold. Wouldn't you also need collars for the phase 1 manifold or similar due to the different injector sizes.

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13 minutes ago, pl0x said:

I've had 2 cars tuned with vf22 and yellows and neither run out of injector, both 220-230wkw range.

 

If you are stuck on the factory top feed idea then yea, id try get factory top feed rails and make an adapter to bolt them to the phase 1 manifold. Wouldn't you also need collars for the phase 1 manifold or similar due to the different injector sizes.

That's reassuring at least. Man v3/4 is a pain haha

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