are the numbers shown for nitrous kits motor or wheel horsepower?

the reason i am asking is it makes more sense for it to be motor horsepower, but in the 5.0 mags and others they do the dyno test on some cars on a chassis dyno. and the numbers are right around what they are advertised at the wheels it seems.

thanks

 

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.

 

well, when i saw the pics it was on a chassis dyno. hell i dont know, maybe they tested the motor out of the car first, but motor made so much more sense to me.

thanks

 

My 150 shot put about 150 to the wheels.