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Tips for racing on highway

Old 09-03-2011, 09:00 AM
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Question Tips for racing on highway

Ok in 3rd gear I can go to about 80 before I red line. When I'm going 70 on the highway in 6th gear I'll drop it down to 4th (Which usually redlined at 100 I believe) and it will redline in about 2 seconds while I'm still going about 75, but then when I put it into 5th the RPMs will go all the way back down to 2500 and won't have very good pick up. When I drop it to 4th shouldn't the RPMs go down? Atleast to like 5000 RPMs? Idk anything about tuning a car but could the previous owner have tuned it to make it like this for drag racing or is this just normal? Doesn't make sense to me.....

O ya I have a 2001 Z28 with 400 HP

Thanks everyone!!!

Last edited by Ironchest87; 09-03-2011 at 09:02 AM.
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Old 09-03-2011, 09:06 AM
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Re: Tips for racing on highway

what kind of car?

I dont know if that is normal, because i dont have a manual trans yet, but tuning has nothing to do with it, it is all about gear ratios... maybe check and see what gears the rear has (search on here to find out how)

also, from the speeds vs rpm it doesnt sound like the car you have is meant to be raced...
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Old 09-03-2011, 09:18 AM
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Re: Tips for racing on highway

2001 Z28 with 400 HP
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Old 09-03-2011, 09:20 AM
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Re: Tips for racing on highway

Probably has a lot to do with your rear end gearing ratio.
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Old 09-03-2011, 09:22 AM
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Re: Tips for racing on highway

clutch slipping possibly?
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Old 09-03-2011, 09:24 AM
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Re: Tips for racing on highway

I am surprised that no one has told you "to take it to the track" yet.
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Old 09-03-2011, 09:26 AM
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Re: Tips for racing on highway

Your post is confusing.

You should be able to get 130mph out of 4th gear:
http://www.f-body.org/gears/

Try to find out what rear end ratio you have. 4.1's should get you yo 112mph.

If the previous owner put 4.3's in it, that would explain the 100mph redline in 4th gear. But you should see that kind of gear in anything but a dedicated drag car.

Are you sure it is hitting the rev limiter? Stock limiter should be around 6k rpm but the previous owner could of tuned this higher.

Last edited by eyeoutthere; 09-03-2011 at 09:35 AM.
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Old 09-03-2011, 09:26 AM
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Re: Tips for racing on highway

Take it to the track
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Old 09-03-2011, 09:31 AM
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Re: Tips for racing on highway

If you car is redlining in 4th gear at 75mph but then is turning 2500rpm at the same speed in 5th, it sounds like your clutch is slipping like xpndbl3 said.
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Old 09-03-2011, 09:32 AM
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Re: Tips for racing on highway

Originally Posted by OutsiderIROC-Z View Post
I am surprised that no one has told you "to take it to the track" yet.
I thought about it, but didnt want to come off as a douche
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Old 09-03-2011, 09:42 AM
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Re: Tips for racing on highway

Originally Posted by BlackIsSecksee View Post
I thought about it, but didnt want to come off as a douche
I thought about it too, but I don't really care about that guys life.
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Old 09-03-2011, 09:47 AM
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Re: Tips for racing on highway

Originally Posted by BlackIsSecksee View Post
I thought about it, but didnt want to come off as a douche
I will say it:

I know that in some states there are many miles of long flat highway with nothing really a danger to anything or anyone. I also know that many, (if not most) of us here have put the pedal to the metal from time to time and lived to tell about it.

That said, going a hundred miles per hour or more is not safe anywhere, even the track, and to take that risk on a public road where crap can happen is not an intelligent way to implement an adrenaline rush.

A good friend of mine messed up his back and neck really bad after losing a front wheel at 105 at our local track a few years ago.

I was startled when my air filter came off and I ran over it at the top end one night in New Jersey.

I have seen too many things... Blown transmissions, flat tires, animals coming out of "no where" to risk my butt, or the life of anyone else to take it to the limit on a public road.

One night many years ago in Chicago I blew an oil gauge line and it sprayed onto my headers and the engine bay lit up. I had two passengers with me and no fire extinguisher. If it had not been for a friendly trucker who saw the flames shooting out from under my front wheels the outcome might have been rather tragic.

So I will be the "dick" and say Take it to the Track!
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Old 09-03-2011, 09:47 AM
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Re: Tips for racing on highway

Originally Posted by stars1010 View Post
I thought about it too, but I don't really care about that guys life.
what about others?
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Old 09-03-2011, 10:03 AM
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Re: Tips for racing on highway

I'd assume the clutch. I can drop down into 3rd at 70mph with 4.10's and be at about 5500-6000 rpm and then pull up to 90 before shifting around 6800.

Oh, and take it to the track.
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Old 09-03-2011, 10:27 AM
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Re: Tips for racing on highway

Ok, I'm new to all this....

1st lesson... Take it to the track (too dangerous on highway)

Got it.

For people asking about the rear end I have a Strange 12-Bolt with 3.73's

Clutch people, I'm pretty sure it's ok but I will def check it out.

If I start from 1st it will go all the way through no problem, it's just when I down shift from a high gear
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