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Old 06-27-2013, 07:46 PM   #1
tavo431
 
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What gears for better top end?

I'm a little confused..... The higher the gear like 4.10 get you quicker off the line but the top end sucks? What type of gears do you need to get a good top end?

I have stock gears and they work like a charm, but I'm wondering if different gears are worth the money for a better top end

Thx in advance
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Old 06-27-2013, 08:07 PM   #2
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You need better aero and more HP to get higher speeds. A stock Camaro is geared to do well over 200mph but the aero and HP prevent it from reaching it.
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Old 06-27-2013, 08:45 PM   #3
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Well Im currently pushing 470hp with cam, headers etc
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Old 06-27-2013, 09:39 PM   #4
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Depends on how fast you want to get up to! I would do 3.73s if I wanted more top end pull, this limits top speed but will get you to say 160 much faster. What would really work is changing trans gearing in 4th and 5th to make it shorter and help push revs up, but for max speed you need more power and aero!
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Old 06-27-2013, 10:34 PM   #5
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L99 or LS3? 3.27s have a great topend
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Old 06-27-2013, 10:42 PM   #6
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Quote:
Originally Posted by tavo431 View Post
I'm a little confused..... The higher the gear like 4.10 get you quicker off the line but the top end sucks? What type of gears do you need to get a good top end?

I have stock gears and they work like a charm, but I'm wondering if different gears are worth the money for a better top end

Thx in advance
What are you trying to do?
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Old 06-27-2013, 11:02 PM   #7
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Depends on your application. If you're staying n/a, better to go with smaller gears or as you say "higher" gears to hit your peak hp earlier in the rpm band. The car will feel lighter and will be quicker off the line as a result. Top end performance would suffer very little and I wouldn't even worry about it unless I was trying to break some kind of stock Camaro speed record or something :\
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Old 06-27-2013, 11:53 PM   #8
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Top end? With out a tune the camaro SS will hit 150-159 depending on what year it is stock. Just taking off the speed limiter the M6 will hit 170+ if you have room

You will need big power to to push the 6th gear to hight speeds.
Also better be thinking about tires if you plan on 150+

Manual transmissions (LS3/TR6060)

3.45 gears:
Top speed in X gear:
1st: 51 mph
2nd: 74 mph
3rd: 107 mph
4th: 153 mph
5th: 182 mph
6th: 269 mph

RPM at XX mph in 6th gear:
60 mph: 1380 rpm
70 mph: 1610 rpm
80 mph: 1850 rpm

3.73 gears:
Top speed in X gear:
1st: 47 mph
2nd: 68 mph
3rd: 99 mph
4th: 142 mph
5th: 169 mph
6th: 249 mph

RPM at XX mph in 6th gear:
60 mph: 1500 rpm
70 mph: 1750 rpm
80 mph: 2000 rpm

4.10 gears:
Top speed in X gear:
1st: 43 mph
2nd: 62 mph
3rd: 90 mph
4th: 129 mph
5th: 154 mph
6th: 226 mph

RPM at XX mph in 6th gear:
60 mph: 1650 rpm
70 mph: 1925 rpm
80 mph: 2200 rpm

4.33 gears:
Top speed in X gear:
1st: 41 mph
2nd: 59 mph
3rd: 85 mph
4th: 122 mph
5th: 145 mph
6th: 214 mph

RPM at XX mph in 6th gear:
60 mph: 1733 rpm
70 mph: 2025 rpm
80 mph: 2325 rpm


Automatic transmissions (L99/6L80E)

3.27 gears:
Top speed in X gear:
1st: 40 mph
2nd: 68 mph
3rd: 106 mph
4th: 140 mph
5th: 190 mph
6th: 242 mph

RPM at XX mph in 6th gear:
60 mph: 1525 rpm
70 mph: 1800 rpm
80 mph: 2050 rpm


3.45 gears:
Top speed in X gear:
1st: 38 mph
2nd: 65 mph
3rd: 100 mph
4th: 133 mph
5th: 180 mph
6th: 230 mph

RPM at XX mph in 6th gear:
60 mph: 1625 rpm
70 mph: 1900 rpm
80 mph: 2125 rpm

3.73 gears:
Top speed in X gear:
1st: 35 mph
2nd: 60 mph
3rd: 90 mph
4th: 123 mph
5th: 166 mph
6th: 212 mph

RPM at XX mph in 6th gear:
60 mph: 1750 rpm
70 mph: 2033 rpm
80 mph: 2333 rpm

4.10 gears:
Top speed in X gear:
1st: 32 mph
2nd: 55 mph
3rd: 84 mph
4th: 112 mph
5th: 151 mph
6th: 193 mph

RPM at XX mph in 6th gear:
60 mph: 1933 rpm
70 mph: 2033 rpm
80 mph: 2566 rpm

4.33 gears:
Top speed in X gear:
1st: 30 mph
2nd: 52 mph
3rd: 80 mph
4th: 106 mph
5th: 143 mph
6th: 183 mph

RPM at XX mph in 6th gear:
60 mph: 2033 rpm
70 mph: 2366 rpm
80 mph: 2700 rpm

If you have a different redline or different than stock height tires, and feel like doing the calculations yourself. Or if you are bored and feel like playing with some numbers, I use this calculator:

http://f-body.org/gears/

The Gear Ratios for a TR6060 (manual) are:
1st: 3.01
2nd: 2.07
3rd: 1.43
4th: 1.00
5th: 0.84
6th: 0.57
R: 3.28

The Gear Ratios for a 6L80E (automatic) are:
1st: 4.027
2nd: 2.364
3rd: 1.532
4th: 1.152
5th: 0.852
6th: 0.667
R: 3.064
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Old 06-28-2013, 07:26 AM   #9
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Thx guys for many of the responses, and btw my car is an ls3. I'm not really trying to accomplish anything just had a question. I just seen all this talk about how changing ur gears make ur call feel faster.... But when putting 4.10 it gets you off the line quicker, but not good at high speeds. I have to problems with my 3.45, but my clutch pedal is staring to get stuck when I race lol

Future plans im going with a procharger ( don't know which one yet).
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Old 06-28-2013, 07:31 AM   #10
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One more thing....

After 3-4 races back to back it's really hard for my 2nd gear to engage.... I missed gear sometimes because of this issue :( any thoughts?
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Old 06-28-2013, 10:10 AM   #11
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I'm not too worried about top speed. These cars are really heavy and getting off the line faster is exactly what they need. To me, when driving on the street, 0-60 or 40-70 is a lot more important than maxing out top speed. With 3.70 gears, the L99 gets going much quicker, and there is still plenty of top end.
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Old 06-28-2013, 10:25 AM   #12
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@ OP, I'm sure you know that if you do gears (3.70, 3.91, 4.10), you'd get into the power band quicker.

Also I'm no M6 guy, but maybe you should change your clutch fluid at a minimum.

A little related, I was roll racing a C6 yesterday from 50 to 110 and I lost every time, but I trap 112 and the other car trapped 118 last year (both autos). I was only losing by about 2-3 cars. Gear or more power would have helped.
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Old 06-28-2013, 10:29 AM   #13
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I thought about it, and I'd for me want more power. Like at one point I paddle shifted and held 3rd it was buzzing some rpms that's for sure, and then we went... he put a car on me... edged a way a bit from there... Another 60rwhp would have been nice (I'm 368rwhp).
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Old 06-28-2013, 11:26 AM   #14
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OP,

I run 3.07 gears in my car...

I have a land speed goal, but believe me it takes tons of power to push these heavy camaros with that gear ratio....

I shift into 5th gear at about 194 mph on hard runs.... i also have a one off trans with a different gear set than stock.... This was all custom built for very high speed runs....

You can change gears to increase the top end capability, but it wont overcome the rolling and air flow resistance until the power is way up there...To give you an example, it takes ~~900- 1000 RWHP in the stock body Camaro to go 200 mph in one mile from a standing start.... I've been about 208 at the 3/4 mile mark, and blew up a turbo and still coasted through the mile at 197.... It's hard to go fast....

The higher the gear number, the more nimble the car will feel... After a given speed range, gears wont help with going any faster.... There are trade off for everything though, the higher gears while making the car feel more nimble, will cause a higher rpm cruise using a bit more fuel....
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Old 06-28-2013, 11:37 AM   #15
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What do you mean by topend? 170+ or 120?

Tighter gears will help acceleration throughout the powerband, so the only reason they suck at higher speeds is because the force you into the overdrive gearing quicker which slows you down.

If for example a 4.10 geared car is at 140mph and is forced into 5th while a 3.73 geared car is still in 4th, the latter car will be faster from that point on. But up until that 140 mark, the former car will be faster because it will have more torque multiplication.

So it all matters in what you consider top end.
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Old 06-28-2013, 05:07 PM   #16
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Quote:
Originally Posted by SSE 4 2SS View Post
OP,

I run 3.07 gears in my car...

I have a land speed goal, but believe me it takes tons of power to push these heavy camaros with that gear ratio....

I shift into 5th gear at about 194 mph on hard runs.... i also have a one off trans with a different gear set than stock.... This was all custom built for very high speed runs....

You can change gears to increase the top end capability, but it wont overcome the rolling and air flow resistance until the power is way up there...To give you an example, it takes ~~900- 1000 RWHP in the stock body Camaro to go 200 mph in one mile from a standing start.... I've been about 208 at the 3/4 mile mark, and blew up a turbo and still coasted through the mile at 197.... It's hard to go fast....

The higher the gear number, the more nimble the car will feel... After a given speed range, gears wont help with going any faster.... There are trade off for everything though, the higher gears while making the car feel more nimble, will cause a higher rpm cruise using a bit more fuel....
Holy crap
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Old 06-28-2013, 05:49 PM   #17
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Quote:
Originally Posted by SSE 4 2SS View Post
OP,

I run 3.07 gears in my car...

I have a land speed goal, but believe me it takes tons of power to push these heavy camaros with that gear ratio....

I shift into 5th gear at about 194 mph on hard runs.... i also have a one off trans with a different gear set than stock.... This was all custom built for very high speed runs....

You can change gears to increase the top end capability, but it wont overcome the rolling and air flow resistance until the power is way up there...To give you an example, it takes ~~900- 1000 RWHP in the stock body Camaro to go 200 mph in one mile from a standing start.... I've been about 208 at the 3/4 mile mark, and blew up a turbo and still coasted through the mile at 197.... It's hard to go fast....

The higher the gear number, the more nimble the car will feel... After a given speed range, gears wont help with going any faster.... There are trade off for everything though, the higher gears while making the car feel more nimble, will cause a higher rpm cruise using a bit more fuel....


Completely agree....

If you are looking for a all out top speed running car you have to figure out how much power you have, and how much power it will take to push the car to that speed. Not only gears, but aero drag, lift, rolling resistance, mechanical HP loss....all take play in what the car can actually do.

You could put 2.73's in the car and have a theoretical top end of like 325 mph or something in 6th gear....but it would probably take 2500 hp to push the car to that speed given the car's stock weight and body.

You would like to see the car reach top speed in just a slight overdrive...so in these cars 5th would be the better gear to top out in, since it is going to take even more power to push the car in 6th...most slow down in 6th given the ratio's (look at the ZR1 Corvette...they changed the trans ratio's so it would top in 6th).

Then you have to figure air conditions for that day, wind speed, altitude of where you are running....if you wanted to get right down to what the car would actually do, not just on paper.
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