im am about to put et 5.3 heads on my car and was wondering if i am going to need new injectors and if so what size? its a 2001 z28 with 18k miles and here is a list of what is already done to the car---

thunder racing cam-230/236 .592/.602 112 LSA
fast intake-90mm
fast throttle body- 90mm
patriot gold valve springs
thunder racing hardened push rods
strange S60 rear end
411 gears w/ easy locker
35 spline axles
BMR springs
BMR panhard bar adjustable
BMR adjustable torque arm
txtralia clutch
upgraded flywheel
Z06 hydraulics for clutch
steel driveshaft
mti airlid
pro 50 shifter
pacesetter headers
3" x pipe w/ cut outs and slp loudmouth
nitto 55Rs

 

You should be fine with that setup, although alot of people upgrade to 42#s. You'll need to retune if you get bigger injectors. I have brand new Mototron 60# injectors for sale.

 

I would get some bigger ones if I were you. I was at 89% duty cycle with 5.3 heads and a 224 cam.

 

I would get 36 lbs injectors for that setup. If you add more power or nitrous, upgrade to 42's.

 

what brand do you all prefer and would it hurt to go a head and get 42# injectors? just incase i decide to put my nitrous back in?