Prevent spark blowout at the higher boost level. I don't know how good the ign. is on this car. Somewhere in my post reading and searching, I read that someone had to tighten the gap to get performance back. It's quite common on boosted setups when increasing boost keeping the candles lit and producing power. It's always best to light the fire and get a complete burn! Even using MSD ign. on our boosted 550 HP turbo sled requires gaps down at .018" or below. Any more gap than that, RPM's and boost and performance falls off.