Rep Power: 687

what size fuel injectors should i upgrade to? I am currently pushing 560horsepower. I have a chip,2.81 pulley, x-pipe and cat back, throttle bodie, ngk plugs, heat exchanger, jlt cold air, and headers. Is this just a direct replacement with no other mods. I should have 39# injectors on my 2003 cobra. Is this enough. any help would be appreciated

 
Rep Power: 697

You should step up to 50# injectors with a large MAF. You should already have a chip installed, have it reburned for the proper parts. If you dont have a chip installed, go see Paul @ Steeda.ca for a custom dyno tune. With 560 flywheel HP the stock Cobra injectors are likely near maxed out.
SS

 
Rep Power: 687

Thamks. I have the diablo predator chip in and my jlt cold air intake is 12" long 4" round so that should be fine. My chip was programmed for the smaller pulley and intake so it wouldnt run lean. By the way will the injectors really give more power and torque

 
Rep Power: 697

No, they will not add any power on their own. They open up the availability of more power due to the ability to add in more timing and/or boost.
SS

 
Rep Power: 687

thanks alot. I am currently hitting 15 p.s.i. and my chip has advanced timing in it so I should be o.k. right? where are you from and whats your ride. My mustang club is doing a run on may 20 to Orange County Choppers. Should be f---in awesome. Also what size gap should i be runnung with the ngk plugs.

 
Rep Power: 697

Cool, as long as you dont hear any detonation you should be fine. You should be running a .028-.032" gap in your plugs. My ride is a single turbo 85 GT.
SS