I was considering upgrading my 04 f150 ignition system with aftermarket coil packs like the ones from Granatelli Motorsports. Has anyone had any experience or real world testing with this type of setup?

Thanks,
Jason

 

I'm by no means an expert on this stuff, but I think I recall seeing a thread that basically said that upgraded coil packs don't do much for an otherwise stock vehicle. You'll only realize a benefit if you have a heavily modified truck and/or forced induction... Again, just what I recall seeing...

 

I also recall reading somewhere that it only benefited those who live in highly humid areas where high humidity is causing the stock COPs to mis-fire.

 

You all should look at this situation a bit closer.
Using higher output coils, sets up for greater possibility of failure at the plug boots for leakage to the plug shell.
The plugs have a built in center electrode resistance that will drop more of the higher voltage from the replacment coils, during the spark phase that completes the current path of the circuit..

Unless the motor really has a need due to high compression or blower use, and the use of low or no resistance plugs, changing coils may not be the thing to do.
Plug resistance really kills the ignition power tranfer efficieny at the sparks breakdown resistive phase, that starts combustion.
Plug resistance only use is to help reduce rado inferference and possibly interference back to the PCM.
There is more to all this than meets the eye.