Vosko are you trying to compensate for something with bigger injectors? Injector envy is a curable disease. if you can admit that you need help. https://www.nopistons.com/forums/pub...DIR#>/spam.gif

i admit i want to run lots of boost LOL

Just curious about the injector sizes mentioned here. My buddies 13Bt Rx3 flatlined at 320 rwhp with 4 std 550cc injectors at 100% duty cycle & bad lean-out, but produced 290 at 85% with a 12.0 A/F

We threw my 12A turbo injectors (880 cc) in the secondaries & got 320 again with 11.5 A/F, my injector software says up to 400 hp would be supported by this setup. There is a Rx3 here with 4 12A turbo injectors running in the 10's on C16 fuel......I guess you guys are chasing really big power numbers?

yes, VOSKO must have a petrol station in his garden. LOL https://www.nopistons.com/forums/pub...IR#>/beer2.gif

its illegal in the us to go over 70% duty cycle



mike

my goal for the car is 500rwhp.........we'll see if it actually happens https://www.nopistons.com/forums/pub...DIR#>/wink.png

I once went to 70-75% duty cycle with my 4 1600's at around 19-20 PSI, but I was running kind of rich. 4 1600's should be good for 1000 HP. So 60-70% should give vosko what he needs.

I once went to 70-75% duty cycle with my 4 1600's at around 19-20 PSI, but I was running kind of rich. 4 1600's should be good for 1000 HP. So 60-70% should give vosko what he needs.[/quote]

i hope so!

OIC. We use 80% here as a rule, the thinking being you can't ensure accurate opening & closing with less than 20% of the cycle to do it with. The A/F ratio is GOD! A good wideband O2 sensor is invaluable. I tune WOT to 11.8-12.0 at 80% duty cycle and 2 litres of fuel flow returned to the tank. This seems to produce good hp at a nice safe non-detonating A/R. We leaned & advanced a 'mule' motor & got another 60-70 hp with no other changes but thats a time bomb 2 pass motor for the 'win at all costs' mentality!

i'm hopefully dyno tuning my car next week!