mabye im overshooting here but since you have CTR pistons in the block your compression has increase quite a bit. im also assuming you have bolt-ons as well. what ECU are you running and is the ECU chipped?? if so is the car tuned?? light throttle bogging sounds like a fuel issue to me, and I have seen this countless times where a head is milled, someone puts high compression pistons in and does not at least chip the ECU. in some cases the motor is starving for fuel, or its a case of being over timed and the bogging is in fact miss fires due to detonation or something else tuning related. 1st things 1st, what is your setup? what was your static compression, and have you done a compression check lately?