Motor. Every magazine I've seen there's been substantial loss. A 150 shot system was making an increase of 98rwhp. Granted it was on a stock car with intake exhaust and sufficient fuel system, with 145,000 on the clock.
__________________
"There's more flawless engineering in a Camry than all the berlinettas Enzo ever conjured while lying next to mistresses." - John Phillips/Car and Driver 
The swapped hatch hotness
Slow Five-Oh Rustang