I make pneumatics
Join Date: May 2005
Location: Fishers, Indiana
262X02 is offline
Re: How did GM get 260 hp out of the ZZ4.3?
I switched from the spider injection to the marine a few years back and picked up maybe 10 hp and 10 ft-lbs at peak. It did move the torque curve a little bit. I have the dyno graphs at home I could scan in.
I could see the ZZ4.3 intake adding maybe 15-20hp from the high rise design and straight run into the cylinders. I know with the marine and stock intake manifold the runners cross under the intake pendulum.
06 TBSS AWD - my DD
10 MKV Jetta TDi - wife's DD
02 Xtreme, 4.3L, 5-speed, K&N FIPk, B&M shifter, Blazer DP Front Brakes, LS1 Disk Rear Brakes, PermaCool e-fans, Flowmaster 40 dual side exit, Marine Intake Manifold, CompCams 270AHR, CompCams High Energy Lifters, Cloyes Timing Set, MSD coil, Taylor 8.2 wires, PLX Wideband, HPTuners Pro, 39lb EV6 Bosch Injectors
Coming Soon: Turbo, Syclone headers & crossover, new Magnaflow exhaust