is there a hp diffrence with tailpipes vs. turndowns

[Chris_H]

Ron,
Since it seems like you know quite a bit about the turn downs, here is my question to you. If you are familiar with the Fox bodies and their exhaust, like I stated in my last message on this topic, I don;t have much room after my mufflers for a turndown. Is there a certain length that they probably should be, or can about 6-8 inches of pipe be enough for the turndown? I don't think I can get that much pipe in there with how close the mufflers are to the differential. I have debated doing turndowns for a while, but now with these bigfoot tires I have for slicks, I need the pipes taken off. I hate tying them up at the races, looks all ghetto.

Thanks
Chris