Quote:
Originally Posted by paxo89
Plans sound awsome mate  Just out of interest how do you decide on what injectors to buy before anything's been built up? |
Thanks mate !!
I've been using the following formula (Taken from a forced induction book) to get a rough guess:
Fuel flow: = (HP x K) / C
HP = max horsepower
K = 5.6 for forced induction engines OR 4.6 for NA engines
C = number of cylinders
Injector static flow = (TF x 100) / ( N x M)
TF = theoretical flow (from above)
N = Number of injectors per cylinder
M = Injector Duty Cycles
Therefore for me it is roughly as follows:
(350x5.6)/4 = 490
Then:
(490x100)/(1x80) = 613cc/min
I've gone for 630cc injectors so should cover me so I don't need to upgrade them halfway through mapping if things go better than expected etc.
I'm not sure how accurate this is but it seems to be on the right lines as the injectors I've just bought (630cc@3Bar) came off a car built by a respected tuner and it produced 290bhp@the wheels.