Porsche Orange Injector BHP Limit

[Jamo]

Can anybody tell me the HP limit of my Porsche 911 Bi Turbo Injectors?

Believe they are Bosch part number 0280150791

Flowing 511cc at 3 bar.

They are running 4 bar on ABY FPR which I work out at 590 cc?

Thanks

[Jamo]

Just to add my calculation

I calculate a 56.1954 lb rating on the injector which is roughly what 500 bhp limit?

[4WheelDrifter]

Rule of thumb: Injector size in cc = about max hp on 5cyl engines.

HTH

[A80Avant]

http://users.erols.com/srweiss/tableifc.htm

check this page...the info is of many bosch injector flows

[Audi_CQ]

Can anybody tell me the HP limit of my Porsche 911 Bi Turbo Injectors?

Believe they are Bosch part number 0280150791

Flowing 511cc at 3 bar.

They are running 4 bar on ABY FPR which I work out at 590 cc?

Thanks

Are you sure it's 511 @3bar? I think it's 511@3.8bar, but not 100% sure

[Audi Parts Guru]

Can anybody tell me the HP limit of my Porsche 911 Bi Turbo Injectors?

Believe they are Bosch part number 0280150791

Flowing 511cc at 3 bar.

They are running 4 bar on ABY FPR which I work out at 590 cc?

Thanks

How did you come to that figure Jamo?

[Jamo]

nobody can tell me the correct figure going off another audi forum in america.

http://www.s2forum.com/forum/showthread.php?t=21737

On here some people say they are 397 others 511 etc etc etc

It's no matter I've source some replacements

[Jamo]

Are you sure it's 511 @3bar? I think it's 511@3.8bar, but not 100% sure

Ah if so I'll recalculate it mate tomorrow

[S2central.net]

3bar is the 'normal' pressure (43.5psi) used to quote injector rates. The conversion calculation for different flow at different pressure is easy enough.

The rules of thumb I always remember are as follows. Both assume you have some flow information at the pressure of interest -

1 - Multiply flow rate in lbs/min by 10 and you get approx max bhp

2 - Flow rate in cc/min is also approx max bhp

Theres other more elaborate calc around but those two are good ready-reckoners.

Rule 1 gets you 560 and rule 2 gets you 510 so say ~535bhp on average. Oh both these rules assume an injector duty cycle max on 85-90% as it is folly to assume you can reliabley control anything higher than that.

Paul