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400-450Hp Rb25 Build Questions

51NNA

By 51NNA,
in Engines & Forced Induction

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75coupe Grand Master

75coupe

Posted
Posted

I made 260kw at 15psi so never 100% injector duty.

Injector duty is around 88-92%.(depends on AFR)

Does someone want to explain to me how thats possible?

Im making 290rwkw with 500cc and it 77% duty...

going by the above statement I could run E85 on my 500cc injectors and get more power... wtf...

JonnoHR31 Grand Master

JonnoHR31

Posted
Posted

PLEASE don't! :P

please do!

it's not possible under normal circumstances. unless your running wmi or something similar anything more than ~200rwkw on standard injectors is either running lean or is just a happy dyno.

blk94r33 Mentor

blk94r33

Posted
Posted

please do!

it's not possible under normal circumstances. unless your running wmi or something similar anything more than ~200rwkw on standard injectors is either running lean or is just a happy dyno.

Happy by 60 rwkw?

Standard injectors are 370cc, which i've been told makes them good for 370 crank HP at 100% duty and standard pressure, or there abouts? So in theory, the 400-450 crank HP Toshi is making would need %15-%25 more pressure to keep them below %90 duty?

Is that right, or am I missing something? Also interested in this.

51NNA Community Regular

51NNA

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Posted (edited)

Defently not the dyno, it reads within 3kw of factory spec on new cars that have been run up, maybe ive just got a freak 25? oh btw my vvt isnt connected =/ but that only affects mid =)

Edited by 51NNA
51NNA Community Regular

51NNA

Posted
  • Author
Posted (edited)

correct its also a dyno dynamics, my tune was done at 11pm on a winters night so it was getting nice freezing air, doubt it would make the same power in summer.

Edited by 51NNA
51NNA Community Regular

51NNA

Posted
  • Author
Posted (edited)

no...were did you get that idea from? LOL there is a setting that shows flywheel power but its defently RWKW, i dont understand why you think its so hard for a rb25 too make 200rwkw, my rb20 stock on 1bar was making 180RWKW...

Edited by 51NNA
51NNA Community Regular

51NNA

Posted
  • Author
Posted (edited)

Youll find most will say HP and RWHP these days, the tests were done on stock WRX's, when i worked there we mainly did wrx's because of the AWD dyno..and most of the time people would complain our dyno showed a low reading compared too others.

Edited by 51NNA

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