Larger injectors for Subby
#1
I have an 89 RS Legacy down here in New Zealand and it's in race trim for sprints and hillclimbs etc.
Anyway - I have resently replaced the IHI VF8 turbo with an IHI VF23 roller bearing unit from a Version 5 WRX STI along with everything that sits on the block to accomodate it properly.
Looking at the injectors now and I have some that have a yellow coloured top on them rather than the stock grey - from what I can gather they should be higher flowing than stock but I really don't know, does anyone know ?
I'm wanting to run comfortable and reliable at 320 HP so need to make sure that fuel delivery is not a problem...help with that subject would be appreciated.
Anyway - I have resently replaced the IHI VF8 turbo with an IHI VF23 roller bearing unit from a Version 5 WRX STI along with everything that sits on the block to accomodate it properly.
Looking at the injectors now and I have some that have a yellow coloured top on them rather than the stock grey - from what I can gather they should be higher flowing than stock but I really don't know, does anyone know ?
I'm wanting to run comfortable and reliable at 320 HP so need to make sure that fuel delivery is not a problem...help with that subject would be appreciated.
#2
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Macker,
Stock injectors on a V5 are 440cc, and will be fine for 320bhp. The greys are 380cc.
Mark.
Stock injectors on a V5 are 440cc, and will be fine for 320bhp. The greys are 380cc.
Mark.
#3
Thanks but I don't know that the injectors are from a Ver 5, they were in the manifold that I bought which came off a wrecked Twin turbo legacy...the manifold was the same as the STI unit and all I had to do was buy the single turbo air intake...
So long story short all I know is that the injectors are yellow and that they don't leak ... are all yellow ones 440cc ??
Also will the stock fuel pump keep up ? I'm going to build a surge tank and could fit a higher volume pump as well.
So long story short all I know is that the injectors are yellow and that they don't leak ... are all yellow ones 440cc ??
Also will the stock fuel pump keep up ? I'm going to build a surge tank and could fit a higher volume pump as well.
#4
440cc injectors are yellow (mine are anyway).
The stock Subaru pumps that we have tested were definitely not up to the job. I've replaced mine with a motorsport pump which is capable of flowing almost double the volume of the old at high pressure. I was going to opt for a surge tank but a foam fuel cell in the existing tank did the job.
The stock Subaru pumps that we have tested were definitely not up to the job. I've replaced mine with a motorsport pump which is capable of flowing almost double the volume of the old at high pressure. I was going to opt for a surge tank but a foam fuel cell in the existing tank did the job.
#6
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I know the Legacy used 480cc injectors (not certain what years) but, the 480cc's are also yellow.
Mark
Mark
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