Small block Chevy in a cobra?

[blykins]

Originally Posted by peterpjb

700hp... 850hp... lots of power, guys

is that the power on the dyno or at the rear wheels?
brent, did you ever measure the difference with your engines?

Engine dyno power. Last 460W I did made about 720 hp on pump gas.

I don't have access to a chassis dyno, so I only have numbers from guys who put the engines in the car, then take them to tune. On Cobras, the difference can be pretty substantial because of the restrictive sidepipes and air cleaners. I think the last Cobra that I saw the results for made 660 hp on the engine dyno and 550 on the chassis dyno. So about 17% loss.

On other vehicles, can be as low as 15% or as high as 20% if the vehicle has a 9" rear and an auto trans.