porsche orange injector flow

[aronmatic2]

I am looking for info about orange injectors. everibody says diferent.
0280 150 791 Porsche 911 Turbo (94-97) 311,0
0 280 150 791 33.95 Porsche Turbo
and other site said 39lb/h

what is the rightone?
what is the max hp with these injectors?

aron

[S2central.net]

A good appoximation for maximum power on a 5-cylinder engine is the fuel flow rate in lbs/hr x 10. eg A 50lb/hr injector gives approx 100hp per cylinder and therefore 500bhp max on our engines.

Note that some headroom of approx 15% is required for reliable injector duty cycle. This would derate our theoretical 500bhp down to 425bhp with a max duty cycle of 85% on the injector.

I don't have specific info on the Bosch orange injector. Always be careful at what fuel pressure these results are quoted - its normally 3bar (43.5psi). When running higher rail pressure, then higher flow will result as per the formula below
F1/F2 = sqrt(P1)/sqrt(P2)

Always remember to get sets of injector carefully checked and flow matched for your application - manufacturing tolerances (and dirt if pre-used) can cause different performance and spray pattern.

This article from holley is good background info -
http://www.holley.com/HiOctn/TechSer...l/Artcl07.html

[Doug_RS2]

The orange injectors are definitely not big enough for 550 HP

[aronmatic2]

thank you guys

so i mean, if i use the set of orange with k26/garret gt3076r arond 2.3 bar, the injectors will be slight around 4800 rpm. i am thinking about a second set of injectors for high rpm. i dont want to use biger injectors like 80lb/m. its will be so rough on 1000rpm.

[S2central.net]

If your peak estimated power is 500bhp then go for a set of 60lb/hr injectors. That will give you plenty of headroom - especially with a fuel rail pressure in excess of the normal 3bar that injectors are rated at...


Paul

[Doug_RS2]

650cc/min injectors running at 4 Bar (740cc/min) will be plenty fine for 500 HP, Jeffer is running them, Mark is running them and they are just fine.

Just for info, Doug (this is Mihnea posting from Doug's account) is running 840cc/min injectors and idle is perfect at 840 RPM and 14.7:1 AFR.

HTH,

Mihnea

[aronmatic2]

Thanx for answering

Mihnea i remember you selling big injectors. please send me infos about prices with shipping fees to hungary. if you can give me a good price, i send the money to you. its important to me.

thank you

aron