Basic items that influence accuracy:
-compression consistency
The more consistent the air being expelled is, the more consistent the shots will be. Having a perfect copression system also helps to get the max performance potential out of your internal setup. Your compression setup consists all the way from your piston head/O-ring to the barrel. Piston head/O-ring>cylinder> cylinder head> nozzle> bucking>barrel> hop up unit
Between each individual part are things that can be done to improve. The best thing you can do is keep all the parts in the (compression) system the same brand, as they are generally designed around each other for best fitment, alignment and performance.
-hop up assembly
Best way for improved accuracy is primarily in the hop up assembly. Such things as barrel quality play a big factor. Brands known to have among the best internal consistency and finish are PDI, EdGI, and Prometheus. Bore diameter has been found to be a different factor.for different aspects of performance. Tightbore's (6.00-6.03 mm)generally have their best performance in short range/cqb, where as a little wider (6.05-6.08mm) generally proves to have great accuracy at further range engagements.
These all depend on other factors such as voluming and bb quality.
Basic factors that influence ROF:
-motor
Neodymium, as mentioned before, is a must. TPAs of motors are the real kicker. TPA stands for Turns Per Armature. Lower TPA:Higher RPM/less torque(but still more than ferrous magnet motors) Higher TPA:Lower RPM/higher torque. TPA ranges from 12-32 from what I've found. General ranges/specifications: <12-15 commonly considered high speed. 16-18 known as balanced between speed and torque. 19-24+ is generally the torque range. And 28-32 are known as frankentorque.
-gears
Ratio paired well with motor TPA is key for achieving what you are looking for. Low ratio 10:1-13:1 (aka "high speed gearsets") are optimal for speed setups. These are best paired with high torque(respectable ROF) or frankentorque(slower than high torqure, but super power effecient and best trigger response), but can be paired with bakancrd and speed motors to reach into the 40-50 RPS. BUT speed motor/low ratio gears will cause plenty of motor heat.
Ratios 16:1-18:1 have a little more torque as a gearset, so balanced motors can be used to get similar results to low ratio/high torque. And gear ratios higher than 18:1 aren't really well suited for.high speed(save for certain DSG setups, but I'm bit going to explain that now)
-wiring
Low resistance wiring, with a basic 3034 mosfet is a must. 16ga wiring is the norm for any rewire(or should be anyways). And in some builds, even 14ga. But not only the wiring, but you will need deans or other low resistance connectors to prevent potential frying/shorting in the connector.area, and deans can occasionally(usually in stock setups) been known to improve performance slightly.
-battery
It is important to have a large enough battery to supply enough power for your setup. High C-ratings in lipos indicate lower internal resistance, thus higher discharge rate. Amp draw is another factor, and with lipos can be calculated by: Amps=(C-rating)x (capacity in Ah)
Ah=(mah)/1000
Example:
So a 35c 1400 battery would supply 49amps,
25c 1000 would supply 25amps
I like to go as big as i can fit, as the motor will only draw as much as it needs. If it doesn't have enough power, you risk damaging your battery, and even potentially your motor/mosfet/wiring.
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