Im working out some stuff for aquamist and was wondering do the G60 injectors run as 85% duty cycle?
If the car has been remapped would this duty cycle change?
85% of 250cc....
Your second question doesn't make any sense, change compared to what?
If the engine has been modded a lot, would the duty cycle change?
What you trying to suss out mate?
Water injector to use for the aqaumist.
Looking at your map, your 250cc injectors are running around 75-78% duty cycle on 1 bar boost above 2500rpm or so.
What are the calcs that you're using?
Ok thats good to know,
I have been using this from someones basic working out on their injectors:
4x 750cc injectors = 3000cc/min max flow
lets say i have a max of 80% duty cycle on the injectors
80% of 3000 = 2400cc/min
15% of 2400 = 360cc/min
So mine, if 85% was factory setting, is this:
4 x 250cc injectors = 1000cc
1000 x .85 = 850cc
15% of 850 = 127.5cc
Richard From ERL has said that 0.5 flows around 200cc/min and with 25% methanol im not far from ideal. Awaiting to hear back from him now if its better to go with 0.4 or 0.3.
Aldo can use this one that someone worked out on an rx 7
Injector setup is 2x720cc primaries and 2x1600cc secondaries.
To run 15% water to fuel at 70% IDC, I calculate this way:
(IDC) x (Total fuel cc's) x (Target % water) =
(.70) x (1440 +3200) x (0.15) = 448 cc's of water
Then, also assuming the water nozzles operate at 70% DC and one 0.9 mm WI nozzle flows 315cc (max), I get:
(15% water to fuel) / [(WI flow rate) x (IDC)] =
(448) / [(315) x (.70)] = 2
So I would need two 0.9 mm nozzles to meet my 15%.
Alternatively,
The water (mixture)-to-fuel percentage is roughly 10% with one .8mm nozzle and one .5 mm nozzle in my setup.
Here is how to find that:
To run 10% water to fuel at 70% IDC (assuming), calculate this way:
(IDC) x (Total fuel injector cc's) x (Target % water) =
(.70) x (1440 +3200) x (0.10) = 325cc's of water
Then, knowing the water nozzles operate at 70% DC (from our assumption of IDC) and one 0.8 mm WI nozzle flows 280cc (max) and one 0.5 mm WI nozzleflows 180cc (max), I get:
(required cc's of water) / [(WI flow rate x IDC)] = 10%
(325) / [(280 x .70) + (180 x .70) ] = 10%