Originally Posted by 94SN95
Hey guys. Just picked up a set of GT40's with the upper/lower intake. Just wondering what's the best way to get the Gt40's to work with my e303 cam? I think double springs are going to have to happen, so I don't float any valves. Also what should I run for throttle body and mass air? I think I'm sticking with 19lb injectors for the time being and stock rockers until I can afford them. Is there a valve spring I can buy that will work with the Gt40's and the e cam? Just trying to get this semi build going. My fiancÚ's dad owns a machine shop, so I the heads will definitely be worked on before going in. Check out the new dished 03/04 Cobras! I love them!
You should be able to run the GT40's fine with the E-Cam and 1.6RR's. Don't change your injectors until you get a calibrated mass air. 19lbs should be fine for your setup, no more than 24lbs if you're just doing a GT40 setup. the GT40 intake flows great too. With Ford springs you shouldn't be worried about floating any valves under 5,500RPM.