There isnt any plug wires on a 2002 4.7l, so I was wondering if there is anything you can change to get more flow to the plugs (ya know like putting on a set of bigger plug wires) or is the 4.7l ignition system untouchable with A/M upgrades

 

Basically the coil-on-plug setup is pretty hot. You MIGHT get a little better plug but the factory set-up is a pretty good set-up. There are upgrades to the coil on plug set-up but it is costly and I don't know if it's available for the 4.7 or not. I think the last place I found this set-up was through JC Whitney and it was around $600.

 

Save your money in regards to ignition upgrades. If you want a little more for the 4.7 your best mods are going to be a programmer and then a Fastman TB, then maybe intake/exhaust.

 

is the fastmantb actually going to make a difference. I already have the CAI and flomaster exhaust.

 

I'd specifically address that question to him here. From what I understand, he has done some serious research and dyno work to perfect the 4.7L TB. He is also one of our sponsors. I believe they are good for about 5hp, but don't hold me to it. I'd e-mail him and ask directly and he'll be able to give you a lot more specific knowledge and info pertaining to the 4.7L TB.

 

What is done with GM's Quad 4 Family with a similar Coil on Plug design is to replace the springs inside the coil to a lower resistance metal, or add extra coil packs before the main coils to deliver a hotter spark, I don't know if the 287's Ignition is exactly the same as the Quad 4's but that's what's done there.