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Old 08-02-2008, 09:57 PM   #1
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Gears

Welp, I don't know much about them other than I know they'll increase acceleration but at the cost of top speed.

So...if stock gears are 3.45 and we'll just say top speed is 160...what would you expect the top speed to go down to with 4.10s?
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Old 08-02-2008, 10:39 PM   #2
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it depends. auto or manual? also stock wheels? what redline?

it would be somewhat significant, depending on whether your top speed is limited by your redline in your final gear. now if you could only get to 160 in 6th gear and you were only at 4500rpm, then you would still have another 2000rpms to roll with to get to top speed with a different rear gear ratio.
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Old 08-03-2008, 02:43 PM   #3
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the auto will have 3.27

Last edited by cam346; 08-03-2008 at 02:58 PM.
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Old 08-03-2008, 04:30 PM   #4
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http://www.kabamus.com/garage/gears.html
Good reference calculator.
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Old 08-04-2008, 08:40 PM   #5
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http://www.kabamus.com/garage/gears.html
Good reference calculator.
ok, i must be doing something wrong because i'm getting about 293 mph @ redline on the ss manual... haha
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Old 08-04-2008, 10:55 PM   #6
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ok, i must be doing something wrong because i'm getting about 293 mph @ redline on the ss manual... haha
The 6th gear in that tranny is for fuel economy only. I believe that if you were to shift into 6th while at 175 mph your power would drop such that you would actually slow down. So top speed is achieved in 5th. I think. I don't know enough on the subject to say for sure though, so anyone who does please correct me.
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Old 08-05-2008, 08:00 AM   #7
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ok, i must be doing something wrong because i'm getting about 293 mph @ redline on the ss manual... haha
well, if you could drive in a vacuum with no gravity then theoretically yes you could get up to that speed, however you have a form of terminal velocity. cus you have to keep in mind that you have air resistance and gravity that will not allow you to get to that speed. plus once you are moving that fast, it makes it harder and harder for the motor to keep accelerating. there was a rough hand formula that basically as your speed increases past a certain point, you need "X" times your horse power to add another % of mph
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The 6th gear in that tranny is for fuel economy only. I believe that if you were to shift into 6th while at 175 mph your power would drop such that you would actually slow down. So top speed is achieved in 5th. I think. I don't know enough on the subject to say for sure though, so anyone who does please correct me.

pretty much hit it on the head. altho with engine performance out there like it is, you could shift to 6th and gradually accelerate faster. the main problem comes into gearing ratios to the point that its better for cruising but like i said above, it makes it harder for the motor to keep the car accelerating.


wait!


DG.... YOU JUST MADE ME THINK OF SOMETHING!
that has nothing to do with this conversation.

people are complaining about the manual SS not being paired up with the L99.... buuuuuuuuuuuuuuut, doesnt the AFM only activate during low load, idle, and cruising situations? (stick with me on this)

GM theoretcially should be able to do a manual L99 with AFM..... but they would have to program it so that it only activates when at idle in N or with the clutch fully depressed at a stop (with a microswitch/sensor on the clutch linkage so that when you release the clutch it goes back to V8) and have it programmed to be active when cruising in 6th gear (highway) and deactivate when you push the clutch in when cruising. and since the 6th gear is only really for fuel economy, add to that the AFM and you could yield 50+ mpg highway with the manual...

now this is all theoretical, but i dont see why it wouldnt work....

damn im good.
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Old 08-05-2008, 01:52 PM   #8
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so wait...your telling me i can't go 293 in my stock camaro? lol i got ya, i just wanted to see what it would theoretically be in 6th. w/ catiajockey's little calculator i'm getting 200 mph in 5th in ideal conditions. i know, we're not in a vacuum, but it just excites me
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Old 08-05-2008, 02:36 PM   #9
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Top speed is probably going to be electronically limited to avoid surpassing the OEM tire speed rating.
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Old 08-06-2008, 12:02 PM   #10
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The cars with T-56s that I know of hit top speed in 5th so that's where I"d expect this one. The trouble may be aerodynamics. I don't know for sure though.

But if not, with the manual + LS3 minus speed limiter... I'd say 180 is possible if the aero doesn't stop it. I know guys who have hit 176 or so in the GTO which is supposed to have a slightly lower drag coefficient. And supposedly SRT-8 owners are redline limited in their giant bricks of cars to 173. So if the Camaro is near as slippery as the GTO (which I've heard has a coefficient like .36 to the GTO's .31), it'll come close to 180 with stock gears. I'm not an engineer or a physics major so I have no idea how significant drag coefficient numbers are.

But unless you're going to the salt flats or a road course with super long straights I don't think top speed will be that crucial to your cars performance. So 4.10s will be plenty for the street and strip.

Although you'll probably take a big hit to fuel econ....
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Old 08-07-2009, 06:07 AM   #11
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Okay... Am finding it as difficult as I expected. What does a stock standard transmission 2010 'maro do if
you change the gears from 3.45 to 3.27?
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Old 08-07-2009, 07:53 AM   #12
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Okay... Am finding it as difficult as I expected. What does a stock standard transmission 2010 'maro do if
you change the gears from 3.45 to 3.27?
Gets slower. To increase performance you want to go the other way, say to 3.73 or 3.90. No aftermarket gears are available yet.
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Old 08-07-2009, 09:30 AM   #13
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LOL on the Necro thread!
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Old 08-07-2009, 09:39 AM   #14
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I was under the belief the cars top speed is in 4th gear. That in 5th and 6th gear the computer limits the engines rpms by cutting the fuel off. So, you wont be screaming at 6500 rpms in 5th or 6th gears.
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