Guys - I just got a few upgrades done to my 2000 GT "Steeda" Mustang. After the upgrades, the performance shop put her on the Dyno, and I ended up with about 250hp to the wheels. Overall, what's a safe estimate on the total hp of the car? I know the final output of the total hp at the wheels is different than the total hp of the car. I'm new to this whole forum deal, just trying to learn as much as I can.

 

i think its -15%, more for automatics and less for a stick. so 250 rwhp = 288 hp about. i think this is what you were asking..

 

It's 250....the only HP that counts is what gets to the rear wheels. By the way, 250 isn't bad.

 

Your best off using a 18% drop for manual 20% for auto.