Finished upgrades.. car stumbles with throttle

[ls1summy]

I am trying to help my brother with his Camaro. He's not very good with computers so I'm on here for him. We just finished doing some upgrades on his camaro and we're not sure what to do to fix it now.

2002 Camaro SS 5.7L
228 Comp cam
Patriot stage 2.5 ported heads
FAST 90mm intake & TB
roller rockers & hardened pushrods
ls7 lifters
off brand SS 1.75" headers
Magnaflow exhaust with cutout and offroad y-pipe (no-cat)
stock 28# injectors, stock tune, stock fuel pump, stock coils
Taylor Wires
Bosch Fusion Plugs

Car starts & idles without problem @ 900 rpm. As soon as you give gas the car stubles and almost dies. It is pretty much not driveable at the moment. We're obvious that it needs a tune but in it's non driveable condition we can't get a good tune done to it.

Thank you in advance for any help you can give

[cammed goat]

You will need a tune once you do a cam swap. PM our sponsor/tuner Frost. He can help you out.

[pajeff02]

+1 You have changed lots of things that affect the airflow through the engine. The fueling is going to be way off and he'll need a tune to compensate for the changes.

[Cutlass]

+2 Frost mail order tune should get the car driveable. Check out the sponsors page and look for Tuned By Frost

[ls1summy]

Thanks for the suggestions. We'll get a tune done asap and see where it takes us from there. We were hoping that we didn't have to replace injectors / fuel pump.