Topless crate set up question

[tbaileyjr]

I was wondering how big of a difference running a topless race is going to affect the handling on our 07 rocket any info would be appreciated

[Matt49]

The roof keeps a lot of air off the spoiler down the straights and the right side b-pillar/sail panel/whatever you want to call it deflects air away from the spoiler in the corners.
Running topless typically makes the car tighter all the way around.

[Racer63]

We had a topless show this past weekend and my car was just a little too tight off to run up front. Same set up as I would have run in the mud with the top on and the car is normally about right. Never thought it could be the top off that made it that way.

[Egoracing]

On a fast 3/8 - 1/2 mile a topless car has a hard time getting onto the bars. Put the top back on and it will be right back where it was. That is how much more downforce the car sees. Clean high pressure air on the WHOLE deck and hood and all of the rear spoiler.

[speedin96]

how much does it affect a car on a 1/3 mile track