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Dragstrip and Launch Techniques Discussion 1/4 mile, 1/8 mile, launch discussions.

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Old 09-03-2012, 08:15 PM   #1
zare6
 
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changing gears 4.10 how much difference

I recently started 1/8 mile dragging with a 2011 ss ls3 manual, I was running high 8's at 83 to 84mph. How much better will my time be with the gear swap. Btw the car is stock except muffler delete and will be running nitto 555r's on a stock wheel
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Old 09-03-2012, 10:31 PM   #2
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anybody try 4.10's?
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Old 09-03-2012, 11:08 PM   #3
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i have 4.10's love them. never use them at the track. and dont use 4.10's at the track. get the 4.11's
basically your new rev limiter speeds will be 45,55,75,105
sooo much better to drive. feels right. much better luck launching, although takes a while to get it to stick. 30% more torque is alot!!!
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Old 09-04-2012, 05:52 AM   #4
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i have 4.10's love them. never use them at the track. and dont use 4.10's at the track. get the 4.11's
basically your new rev limiter speeds will be 45,55,75,105
sooo much better to drive. feels right. much better luck launching, although takes a while to get it to stick. 30% more torque is alot!!!
whats the difference between 4.11 and 4.10"s other than the obvious .01 ratio difference, i want to know how much time i will gain with the swap thanks
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Old 09-04-2012, 11:21 AM   #5
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41/10 teeth on gears for 4:10, 37/9 teeth for 4.11s. The 4.11 is a physically stronger gearset
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Old 09-04-2012, 02:43 PM   #6
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41/10 teeth on gears for 4:10, 37/9 teeth for 4.11s. The 4.11 is a physically stronger gearset

Hi doesnt seem to be much choice it seems the 4.10 is the most common ratio out of the two, i was hoping to find someone who has the same car and did the swap and let me know if it lowered his time much
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Old 09-04-2012, 08:48 PM   #7
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the richmond 4.10's are prone to breakage. they made a new version of it and called it a 4.11. the 4.11 is made with the stronger OEM metal.
as for the times, it will help, but only if you know how to drive. if you are a straight beginner, it will be much more difficult to launch. the stock 3.43's launches beautifully with the stock power every time.
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Old 09-05-2012, 07:42 AM   #8
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I find the stock 3.43s are terrible for launching, reason is they are to easy to bog or burn, there is that sweet spot they like, but its hard to overcome if you miss it! I feel a 3.90-4.11s would make launching easier, letting you launch at a lower RPM and having the engine do more work and getting into the band faster.
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Old 09-05-2012, 07:58 AM   #9
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Adding more aggressive gearing will give your car a better feel (feels fasters, pulls better), but track times don't always agree with the feeling. You can use the torque multiplication theory for more aggressive gearing, but it just doesn't equate going down the track.


Do they help? In many cases, yes.
Do they hurt? In some cases, yes.

It's all about getting the power down (hooking up), and how many times you need to shift going down the track.

I've seen several guys who put 4:10s in their 5th Gen Camaro, later remove them for less aggressive gearing because they were actually hurting their 1/4 mile times.
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Old 09-05-2012, 08:24 AM   #10
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I find the stock 3.43s are terrible for launching, reason is they are to easy to bog or burn, there is that sweet spot they like, but its hard to overcome if you miss it! I feel a 3.90-4.11s would make launching easier, letting you launch at a lower RPM and having the engine do more work and getting into the band faster.
I agree with u totally, the 3.43 are a terrible launch ratio for this car, i was beat by cars with 290 hp, they beat out of the hole every time. They all had cars with 4.11 or lower
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Old 09-05-2012, 04:09 PM   #11
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for me, not a drag person, just drift and track. I could just go for it every time with the stock gears. I would rarely slip. had very consistent launches. with my 4.10's it took me some time to learn the sweet spot. it loved to slip. maybe i am just now learning to launch. i dont know if i could launch a stock car correctly anymore. all i know is that i love my gears, i can launch like a dream. if i want i can spin through third all the way through the fourth gear shift. entering drifts is nothing but holding throttle.
for straight up drag i feel it would be too much gear if i added any more power. I feel i have to ride the lower rpm to keep from spinning, while 3.91's I could put the same power to the ground using higher rpm. that extra shift in the 1/4 mile from 3.91 to 4.11 is a big difference also. The big recommendation i have seen on here all depends on the power level you have. more power the less aggressive gearing you want. I know people that have 4.33's and can launch as if they had twice the power. tires also matter, if you are running drag radials or stickier, you can run a step higher gear ratio. the common on here for the big boys is 3.91 for manuals, and 3.73 for autos. I just cannot explain how much more fun the higher gear ratios are though. it takes the car from a street car to a race car. If you are after that timeslip, not just fun, you need to really understand how you drive, and then talk to someone like ted jannetty. he can tell you what you want, but only after you know what you have.
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Old 09-06-2012, 04:37 PM   #12
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best way is if ur gonna run a 1/8 i say the 4.11 would be nice . u want to go across the line around 6000 rpm or so . so how much power u have will play a row in what gear u are going to go with. i know im at 461 atm to the wheels and i havent had this car at the 1/4 but im gonna say im gonna be shifting at the line . which is no good. so i either need more power to get in 4th a bit before the line or use 3.91 gears or 4.11 . its not all about the feel . unless ur just daily driving and dont care about the times.
thats what i think anyway.
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Old 09-06-2012, 04:39 PM   #13
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u want to be in ur peak hp range when going across the line or close as possible. so 5700 to 6200 rpm just guess every car is diff.
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Old 09-06-2012, 05:41 PM   #14
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i race 1/8 and with the 3.43 i barely get into 3rd before the end,, I am running stock except for exhaust, 435 engine hp, i was hoping someone did the same gear swap and could tell me how much they gained.
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Old 09-15-2012, 08:48 AM   #15
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Quote:
Originally Posted by Parag View Post
i have 4.10's love them. never use them at the track. and dont use 4.10's at the track. get the 4.11's
basically your new rev limiter speeds will be 45,55,75,105
sooo much better to drive. feels right. much better luck launching, although takes a while to get it to stick. 30% more torque is alot!!!
So with 4.11s you will need to shift into 5th in the quarter? Wouldn't that cancel out the benefit?

So is the fastest track setup stock LS3 gearing with taller DRs?
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Old 09-24-2012, 01:06 AM   #16
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Old 09-24-2012, 07:52 AM   #17
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So with 4.11s you will need to shift into 5th in the quarter? Wouldn't that cancel out the benefit?

So is the fastest track setup stock LS3 gearing with taller DRs?
No you would shifting into 4th, right now my car traps 116 at around 5700-5800 in 3rd gear. Adding a 3.90 or 4.10 would put you in 4th gear for a bit. The plus side when using tires and a gear is that your launch would be more agressive and should help push the car though the first half of the track faster... the extra shift could possible hurt a bit.
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Old 09-24-2012, 08:14 PM   #18
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So with 4.11s you will need to shift into 5th in the quarter? Wouldn't that cancel out the benefit?

So is the fastest track setup stock LS3 gearing with taller DRs?
i worded that wrong, those are my shift points, you can rev further than that. i have had 4th to 120 but thats north of 7000 rpm

and yeah it does sometime mean an extra shift, thats another reason you dont want to run too tall of a gear with too much power. for stock, 4.11 is perfect at track, but with 800, you would probably be better off with a short gear like 3.73

you will rev out fourth in 1/4 mile with 4.11's, just as you will rev out stock 3.43's in third.
that shows how much of a difference the gears are and how large of a jump 4.11's are and why nobody really does them if they are only after the timeslip. 3.91's are more reasonable to work with.
in 1/8 you will rev out third, so 3.91 are better there too.
but in a stock car you will still have power all the way to the line. the problem is when you have more power and rev earlier
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Old 09-25-2012, 09:05 AM   #19
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I'd think the 4.10's would (assuming you are running drag tires) help with launching the car and net you some mph up top. In the 4th gen days they were worth a tenth in ET and 2 mph in a bolt-on car.
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Old 09-25-2012, 07:06 PM   #20
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Well I talked to Richmond about the 4:11 gear and they say that, that gear is recommended for track only... They're build out of a nickel alloyd and gets really hot , and in continuous use would burn up....you can also Conbat gearing with different wheel/tire combo...I know my sig says 4:11 but I put that up before installing the gears, I ended up with 4:10 Richmond gears and have not had any problems not even whinning...hope this helps
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