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V8 and V6 Transmissions / Driveline (6L80 / 6L50 / TR6060 / AY6) Driveshafts | Differentials | Gears | Rearends | Clutch | Shifters

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Old 08-09-2011, 11:23 PM   #1
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What gears??

Ok, I know this has been discussed before, but I would like some new opinions. So far I have installed an e-force supercharger with longtubes. In a few months, I want to swap to different gears.
I've heard that 3:73 is the way to go with a supercharger. Anyone out there running 4:11s and happy with them? People that are running the 3:73s...you happy with your decision, or wished you went steeper? Not worried about top speed. I'm looking for takeoff, but not sure if 600 horsepower is too much for 4:11s.
Any thoughts?? Thanks.
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Old 08-09-2011, 11:56 PM   #2
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There is a really good sticky about gearing for performance... Unless you plan on lots of suspension work and slicks, 600 might be too much with a 4.11 gear... Personally, I'm going with 3.07's... 4.11's would be goofy with my power... So would 3.73's... I spin through 4th as it is on anything less than a prepped track with my drag radials...

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Old 08-10-2011, 06:59 AM   #3
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Is your car a stick? 4.11's will be to much on the track but would make an evil street car. You'd have to drive around on slicks but if it ever hooked..watch out. Even the 3.73 may be to much but you'd be much better off with that. My car is an auto and as the HP increase we had to move to a higher gear (lower number). That's why I have a 3.45 now.
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Old 08-10-2011, 08:17 AM   #4
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My car is a stick. It will only see the track a few times. I'm looking for more fun on the street than the track. This is good info, thanks guys.
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Old 08-10-2011, 09:56 AM   #5
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4.11s are too much gear for a supercharger.
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Old 08-10-2011, 10:01 AM   #6
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I have 3.70 gears from ADM and it is good for a daily driver. I can go 80 and still be under 2000 rpm's.
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Old 08-10-2011, 10:16 AM   #7
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Being that you have an e-force, low end might just be too crazy w/ 4.11's...1st gear will be almost useless. 3.73's would be a good choice IMO. 4.11's would be a better choice w/ a vortech sc because the power curve is higher. Either way you should also be looking into some stickier tires.

on a N/A-M6 car, 4.11's are PERFECT.
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Old 08-10-2011, 10:29 AM   #8
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Quote:
Originally Posted by POWERFREAK View Post
Being that you have an e-force, low end might just be too crazy w/ 4.11's...1st gear will be almost useless. 3.73's would be a good choice IMO. 4.11's would be a better choice w/ a vortech sc because the power curve is higher. Either way you should also be looking into some stickier tires.

on a N/A-M6 car, 4.11's are PERFECT.
AGREED!!!
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Old 08-10-2011, 02:48 PM   #9
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Hey, thanks guys. I appreciate the responses. Seems like 3.73s are the way to go.
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Old 08-10-2011, 03:28 PM   #10
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I have 4.10's with an M6 and 2300 Maggie... My car is used as a race car for Autocross. I use either 2nd or third gear depending on the track layout.

I would not want to drive on the street with these gears. 1st and and 2nd are too low, and way too much noise in 6th on the highway.

I would recommend a 3.73 or stay with the 3.45. I would think 3.73's are perfect for your application.
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Old 08-10-2011, 09:10 PM   #11
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Wouldn't 3.90s also be ok for a e-force supercharged camaro? Or would that be to much gear also?
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Old 08-10-2011, 11:06 PM   #12
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Hey op, I'm not sure if you know this, but on a supercharged car making good power, you go the other way with you're gearing. You'll go faster.
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Old 08-11-2011, 07:42 AM   #13
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Hey op, I'm not sure if you know this, but on a supercharged car making good power, you go the other way with you're gearing. You'll go faster.
you go "the other way" with your gearing, your top speed will be higher on any car...but he said he wasn't worried about top speed, but swapping stock gears for 3.73's isn't going to make that much of a difference w/ top speed.

Gears will also improve the way your clutch feels, which is a nice plus.



Quote:
Originally Posted by Smoky10 View Post
Wouldn't 3.90s also be ok for a e-force supercharged camaro? Or would that be to much gear also?
Wouldn't be a bad choice I guess if you wanted a little more radical low end...a "split the difference gear". Does anyone even make 3.90's for these cars?
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Last edited by POWERFREAK; 08-11-2011 at 07:52 AM.
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Old 08-11-2011, 08:04 AM   #14
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Does anyone even make 3.90's for these cars?
Yes, AAM makes a 3.70 and 3.90 gears that are available through LPE. They are quite expensive, but so far they have been proven to be far superior to the Richmond gears in both strength and noise.
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Old 08-11-2011, 08:19 AM   #15
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Yes, AAM makes a 3.70 and 3.90 gears that are available through LPE. They are quite expensive, but so far they have been proven to be far superior to the Richmond gears in both strength and noise.
oh, so those might be a good choice for SC'd cars...although my 4.10's have held up just fine and make no noise.(quickly knocks on wood).
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Old 08-11-2011, 10:31 AM   #16
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Quote:
Originally Posted by POWERFREAK View Post
you go "the other way" with your gearing, your top speed will be higher on any car...but he said he wasn't worried about top speed, but swapping stock gears for 3.73's isn't going to make that much of a difference w/ top speed.

Gears will also improve the way your clutch feels, which is a nice plus.





Wouldn't be a bad choice I guess if you wanted a little more radical low end...a "split the difference gear". Does anyone even make 3.90's for these cars?
What Camarowguy said is still correct, though we should substitute quicker in there, rather than faster,.... time in the power band, less time shifting, etc... With the ops power, if he stayed where he is or went with a taller gear, the car would be quicker through the quarter and faster on the big end...

The secret is not just grabbing gears that sound like a race gear number... There is a science to it... It involves trap speeds, RPMs, what gear you're in at the finish etc... If I was him, I would stay with the current ratio or consider 3.23's or something along that line...then he can be more than 50 or 60 feet down the track before it's time to grab second...
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Old 08-11-2011, 04:48 PM   #17
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Guys again, I appreciate all the info. I want the take off speed. I'm not looking for top speed. But I know what everyone is saying. I've had six speed cars before and have put 4.11s in them and loved it. But they were 300-350 horsepower cars. With the supercharger, I notice the car revs quicker. So that is why I was concerned that 4.11. was going to be too much. After seeing what everyone is saying and what I have read in other posts, I will probably go with the 3.73s.
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Old 08-11-2011, 04:54 PM   #18
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Quote:
Originally Posted by Big Daddy Kane View Post
Guys again, I appreciate all the info. I want the take off speed. I'm not looking for top speed. But I know what everyone is saying. I've had six speed cars before and have put 4.11s in them and loved it. But they were 300-350 horsepower cars. With the supercharger, I notice the car revs quicker. So that is why I was concerned that 4.11. was going to be too much. After seeing what everyone is saying and what I have read in other posts, I will probably go with the 3.73s.
You'll most assuredly get off the line in a big hurry... Post up some times when you get to that point... I'ld love to see the 60 foot times...
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Old 08-11-2011, 08:29 PM   #19
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I will. It won't be until next year. I won't be doing the gear swap until december. It will give me something to do while the snow is out
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Old 08-12-2011, 06:33 AM   #20
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Originally Posted by SSE 4 2SS View Post
What Camarowguy said is still correct, though we should substitute quicker in there, rather than faster,.... time in the power band, less time shifting, etc... With the ops power, if he stayed where he is or went with a taller gear, the car would be quicker through the quarter and faster on the big end...

The secret is not just grabbing gears that sound like a race gear number... There is a science to it... It involves trap speeds, RPMs, what gear you're in at the finish etc... If I was him, I would stay with the current ratio or consider 3.23's or something along that line...then he can be more than 50 or 60 feet down the track before it's time to grab second...
Great advice,Hendrix-Engineering has had the sixspeed gto ET record since 2006 and we have done it with a maggie and 3.31 gears..OP save your money and keep the gear you have,take that money and dail in your chassis..You have a powerband like a diesel,use it.
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