[portmax]

i guess the best way to tell is mph in the 1/4,i wish desktop dyno had this factor in it, it's been hard to get an accurate # like flywheel hp x .8 is considered by some to be a fair est. but i have seen 454 cobra replica's that dyno out more consistent with a flhp x .9 there aint much between the engine and the wheels in a cobra.i just wondered if any one had figured out what they were losing to trans and rearend. thanx anthony