Has anyone heard of this? I heard from a 4g63 guy about it and he says it can sense knock and pull timing for my engine. I dont think it wil work though because people would be using it already then.

It works, the Miata crowd usually get this right after they boost their engines. Only thing hold most people back is the 500 dollar price tag :(

is that all it does though? any other features?

It retards timing on each cylinder where knock is detected, not all across the board like most. It has an A/F gauge attachment as well.

It's a pretty snazzy device, worth the money I hear.

awesome product! this thing saves engines. very popular in the honda crowd as well

but, do they have a setup for non-distributor ignitions?

on their site they list the Eclipse, but dont specify models...

Its doubtfull, but does anyone have that unit in their car???

The J&S unit was used by Sport Compact Car when they turbo'ed a 2.5 rs subaru. They were running over 400 hp with it, it helps for sure!