GTR 444cc injector, good for and what duty %

[Nicksemianiw]

So just checking around and I THINK the GTR 444cc injector is good for like 300whp or around there, BUT what duty cycle would it be at? Anyone running them shed some light and lets hear what power you make and the duty %

[mbmbmb23]

So just checking around and I THINK the GTR 444cc injector is good for like 300whp or around there, BUT what duty cycle would it be at? Anyone running them shed some light and lets hear what power you make and the duty %

http://www.deatschwerks.com/ca...s.php

[ganma_ca]

Sweetness with that calc. Think I may have done it wrong but to have around 300 horseys with the gtr injectors you need to be close to 90% duty cycle?

[mbmbmb23]

Sweetness with that calc. Think I may have done it wrong but to have around 300 horseys with the gtr injectors you need to be close to 90% duty cycle?

444cc injectors at 90% duty cycleusing 43.5lbs pressure, 0.6 B.S.F.C.= 254hp

For the 444cc, you'd theoretically need to crank up the fuel pressure to 87lbs to get the equivalent of 525cc, which is 300hp at 43.5lbs by their calculator. The question tho is, at 87lbs...what is the duty cycle for the 444cc injectors? 100%+ ? I have to admit I honestly do not know how fuel pressure directly affects duty cycle. Someone please chime in.

[Nicksemianiw]

i just wonder then why some people make like 280whp with 444's then lol.

[mbmbmb23]

i just wonder then why some people make like 280whp with 444's then lol.

The B.S.F.C. (http://en.wikipedia.org/wiki/B...ption) number I had used was 0.6, if you change it to 0.5 it changes the numbers alot. The tool says 0.5-0.6 for forced induction, so if we picked a number right between (0.55) and plugged in 280hp, 4cylinders, 90% duty cycle....it shows 449cc injectors are necessary...which is basically what you have.

-m