Antilag is very hard to get to work properly with the small amount of air that can get through the idle control valve. To work properly you need the throttle jacked open, which makes an'orrible road car (with no brakes). Also antilag causes turbo's to get so hot that they turn opaque. If you want pops and bangs tell your mapper not to cut the injectors when on over-run.
Pops, bangs, flames and a car that is still nice to drive. Sorted