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33/34 injector sizes

fresh

By fresh,
in Engines & Forced Induction

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fresh Rising Star

fresh

Posted
Posted

i've sourced a free set of r34 injectors for an RB25DET, just curious if they will fit into my r33 s1.5 RB25DET ???

also do they flow any diff, my current ones are currently very close to maxxing out and if this will give me a little headroom then it'll be worth it cause they r free

cheers.

btw. i am upgrading fuel pump and reg at same time

mods: FMIC, 3" turbo back, PFC, bleeder(13psi), stocko turbo

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https://www.sau.com.au/forums/topic/67574-3334-injector-sizes/
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IanH Collaborator

IanH

Posted
Posted

They're top feed and thinner too. All the GTT powerFC readings (with standard injectors) I've seen (about 5-10) show 95-100% duty at around 320/330 fly hp (200rwkw roughly) which means about a 330-350cc injector.

I've only seen 1 set flow tested and they made 380cc with an uprated FPR.

Sydneykid Grand Master

Sydneykid

Posted
Posted

I only have experience in 2 X R34GTT's, both ran out of injector flow at 205 to 210 rwkw, that's 350/360 bhp. Which calculates out to 370 cc's which is the same as the R33GTST. We have had untolled R33GTST's on the dyno and they don't get any more rwkw before they also run out of injector duration. Each car is different of course:cheers:

  • 2 weeks later...
Abo Bob Grand Master

Abo Bob

Posted
Posted

Perhaps there are enough other differences in the engines and even the drive train to throw the formula out??

I have found some of my own notes that say they are 330cc and someone else told me they were 330 or 340. I am still looking for actual proof though.

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