injector size?

[Sivik]

a set of RC's will run ya about 300 bones. if you want you could try the hack method and use DSM 450cc's.

at 10 psi, your looking at about 90% duty cycle (around 7000K rpm). RC recommends not going above 80%, but ppl do, but you take a huge risk on that.

if you not going above 10 psi, 450's will fine, but if you want to play it safe go with 550's. better safe than sorry.