An all stock motor with full exhaust and a cam will make close to 300hp, change the heads to GT40's or World Jr's and port the lower intake and the motor could make 30-40hp more. Better heads like the AFR or TW aluminums have the potential to make 400 crank hp but that's beyond the capacity of the stock computer and fuel system and also requires more cam. The Comp 35-349-8 is about as much cam as the SD computer can handle.
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Paul O
1990 F150 4x4 XLT X-Cab 5.0, 3.55LS, Comp XE264HR-14, Flowtech LT's to 3" single, FRPP Mass Air Conversion, TweecerRT with BE, Innovate LC-1 wideband O2
Thanks Conanski, my truck has new magnaflow dual exhaust with 2.5" pipe would that be considered full exhaust? and also i had found some ford racing turbo swirl aluminum heads which they said was an improved version of the GT40 heads, just wondering if you know if i could do a straight up bolt on or if i would have to change my intake.
im running the ford motorsports e303 in my 408w and stock efi setup and im very pleased with its proformance. just a little video to let you hear her purr. YouTube - mk3gtivw's Channel
__________________ FOUR WHEELING - certainly the most fun you will have with your clothes on!!!
buckin, how is that exhaust ran? Duals on a bronco really dont give any improvement in performance due to all the bends to get around the tcase and such. an aftermarket y pipe, hi flow cat and 3" single exhaust will do more for you.
does your duals have an H pipe or X pipe? if not its definatly not doing anything but hindering you.
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