750cc primaries are not enough!
#33
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?
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?
#37
Originally Posted by j9fd3s' date='Oct 11 2002, 10:18 AM
its illegal in the us to go over 70% duty cycle
mike
mike
#38
Originally Posted by 13BAce' date='Oct 11 2002, 04:06 PM
[quote name='j9fd3s' date='Oct 11 2002, 10:18 AM']its illegal in the us to go over 70% duty cycle
mike
mike
i hope so!
#39
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!
#40
Originally Posted by Robbomaz' date='Oct 11 2002, 06:50 PM
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!