K&N top filter problems FYI

[bobcowan]

Originally Posted by JBCOBRA

You realize that unless you have your carb(s) sealed like ERAchas, the hoodscoop doesn't let air in at speed. Actually the opposite is true. The Big hole in the front of the car lets in so much air that some of that air is forced out the hood scoop.

Not always true. I can personally vouch for gaining more power by adjusting the scoop opening. I think it depends on the total set up; including the body in it's relationship to the engine bay. Not all Cobra replicas are equal.

Originally Posted by Jac Mac

Thats because most dynos are not mounted on the back of a raised flat bed doing 80 mph down the freeway

Waste of time trying to diagnose stuff like this on a dyno with the hood open & no 'real world' airflow into the carbs.

This is very true. You don't often run the engine to the max with the hood open and the nearly insignificant air flow of that giant fan.

Originally Posted by ERA Chas

Agreed-that's why I said 'feels like 20' more. Very noticeable improvement in pull at the top end.

I have personally seen - on the dyno - a mild 408W gain 12 hp simply by swapping the solid top for the K&N filter top on a 14"x3" round K&N filter. It happens, I'v seen it. Again, I think it depends on your set up.