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Old 27-10-2009, 03:39 PM   #1
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Settle an argument.

Can someone clear this up for me.

A friend of mine is claiming that it is possible to tune a skyline to 420 bhp on the standard injectors.

I thought 330 was the max before having to change them.

I myself am running standard ones at 100% injector duty at points @1.2 bar, and I'm only getting just over 300.

Who's right?
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Old 27-10-2009, 03:43 PM   #2
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up up to 380 on std and was told i could get 400 by fiddling with my adjustable fpr a little more

so 420... not that far off
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Old 27-10-2009, 03:52 PM   #3
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think RSP got them to 400,but that was max.
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Old 27-10-2009, 03:54 PM   #4
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How are they getting these figures?

I'm lost.
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Old 27-10-2009, 04:00 PM   #5
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by using fuel pressure regulator and increasing duty cycle to 88%

oh and the rest of the mods,fmic,ebc,induction,exhaust,z32 afm,and not to forget.... hybrid turbo
ime getting 338bhp thanks to richard mapping my car (with standard injectors & standard fuel pump & regulator)
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Last edited by moonshine; 27-10-2009 at 04:09 PM.
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Old 27-10-2009, 04:01 PM   #6
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Originally Posted by Jammy1 View Post
Can someone clear this up for me.

A friend of mine is claiming that it is possible to tune a skyline to 420 bhp on the standard injectors.

I thought 330 was the max before having to change them.

I myself am running standard ones at 100% injector duty at points @1.2 bar, and I'm only getting just over 300.

Who's right?
gtr standard injectors are 444cc. I'd say it could be possible to get about 420 horse out of them but you'd be pretty much maxing your injectors which is Veeeeery Baaaaadd!!!!
Why not just buy a set of 550cc injectors?........
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Old 27-10-2009, 04:02 PM   #7
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I'm running 300bhp atf with a few breathing mods and .85 bar on stock injectors.

I've no remap and not even finished stage one tuning ie fmic or uprated fuel pump.
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Old 27-10-2009, 04:06 PM   #8
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Originally Posted by moonshine View Post
think RSP got them to 400,but that was max.
i read a post by RSP sayin this aswell
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Old 27-10-2009, 04:07 PM   #9
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Quote:
Originally Posted by moonshine View Post
by using fuel pressure regulator and increasing duty cycle to 88%

oh and the rest of the mods,fmic,ebc,induction,exhaust,and not to forget.... hybrid turbo

^^^ I Agree

Quote:
Originally Posted by j_jskyline79 View Post
I'm running 300bhp atf with a few breathing mods and .85 bar on stock injectors.

I've no remap and not even finished stage one tuning ie fmic or uprated fuel pump.

^^^ sounds about right too
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Old 27-10-2009, 04:07 PM   #10
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ok j we believed you the first time
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Old 27-10-2009, 04:11 PM   #11
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I am running 400 bhp with standard injectors and a Dentist mapped Power FC. no probs, 3bar fuel pressure.
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Old 27-10-2009, 04:13 PM   #12
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This is aparently an RB25DET. So that's 333cc injectors? times 6, thats's 2000cc a minute.

Is it even possible to get 420bhp?
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Old 27-10-2009, 04:17 PM   #13
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looks ok to me so far. 1.42bar boost, 3bar fuel pressure, 95% inj duty and it wont be far off.
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Old 27-10-2009, 04:17 PM   #14
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well if rising sun could get them to 420 they would have but max they got was 400 ,so i would say......NO.
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Old 27-10-2009, 04:18 PM   #15
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ok j we believed you the first time
Sorry its the damn web browser I'm using on my blackberry
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