[Judd]

I know this is a autoX/road course site but I though some of you might have some insight on this question so I decided to throw this out. I'm thinking about running my car at Maxton N.C. at the E.C.T.A. 1 mile event. I'm putting down around 540RWHP and right now I'm running a 4.10 gear which should max out somewhere around 165 or so. I should get to that which is cool by me since my tech speed should be 175mph. To go over that, I will need a real cage which I'm not willing to do right now.

Later, I would like to replace the gear so I can get some more mph but I'm a bit confused. I've heard that you really should do your best to run 4th gear {1:1} for top speed events because that is the most efficient but my my set-up would really be doggy with something like a 2.73 in the rear. I'm really thinking of running a good dose of nitrous in an effort to get to 200mph {one of my goals} and I think I should have the power to do it but just how much will running 5th gear hurt me? Sure would like to run a 3.42 or 3.73 so I wouldn't have to swap out axles all the time.

Also, I will be carrying a trailer with extra wheels, tools and possibly a bike so I really would like to keep a low gear.

[roadracetransam]

I ran around 170 (based on RPM) with 3.23 gears and A4 in 4th gear. 4th gear is 0.70 gearing. It was with the stock motor so around 310 RWHP. I am sure with your HP you won't have trouble pulling in your top gears.
I don't think you will need nitrous.

This post has been edited by roadracetransam: Dec 25 2007, 06:33 PM

[Judd]

I ran around 170 (based on RPM) with 3.23 gears and A4 in 4th gear. 4th gear is 0.70 gearing. It was with the stock motor so around 310 RWHP. I am sure with your HP you won't have trouble pulling in your top gears.
I don't think you will need nitrous.

If I were on a nice 5 mile stretch you would be right but from what I'm told,,, hitting 200mph in a mile is pretty hard.

Thanks for the replies. Especially the part where I could still use 5th gear and only give up a smidge of efficiently. Man, I was dreading running a 3.08 or 2.73 gear and now it looks like I will be fine with a 3.73 or a 3.42 and that if cool by me.

Thanks for the help.

This post has been edited by Judd: Dec 25 2007, 07:29 PM

[roadracetransam]

I ran around 170 (based on RPM) with 3.23 gears and A4 in 4th gear. 4th gear is 0.70 gearing. It was with the stock motor so around 310 RWHP. I am sure with your HP you won't have trouble pulling in your top gears.
I don't think you will need nitrous.

If I were on a nice 5 mile stretch you would be right but from what I'm told,,, hitting 200mph in a mile is pretty hard.

Thanks for the replies. Especially the part where I could still use 5th gear and only give up a smidge of efficiently. Man, I was dreading running a 3.08 or 2.73 gear and now it looks like I will be fine with a 3.73 or a 3.42 and that if cool by me.

Thanks for the help.

Sorry, I had to re-read the question. Mine was not a standing mile just top speed.