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Old 01-15-2013, 08:18 AM   #1
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changing axle ratio with bama tune...what does it do?

I have stock gears, so should I use the 3.27 ratio or would increasing the ratio help with acceleration?
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Old 01-15-2013, 09:09 AM   #2
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I have stock gears, so should I use the 3.27 ratio or would increasing the ratio help with acceleration?
AustinMueller,

Depending on your Transmission and what Factory options the car was built with, you have either 3.31's or 3.55's. Those gears are pretty tall and I definitely recommend getting a 3.73 or 4.10 in there! Gears are one of the most beneficial mods you can do in my opinion.

You'll notice a huge gain in Acceleration and Low End Torque! We can also adjust for your speedometer within the Tune. So just let the Bama team know what gears you're installing and will gladly hook you up!

I hope this helps. Let me know if you have any questions or need some assistance. Our Bama Performance tuning specialists are here in the building Monday-Friday from 9AM-5:30PM EST and Saturday 9AM-5:30PM EST. You can hit them up directly at 888.226.9764 and they'll get you squared away!

-Dan
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Old 01-15-2013, 09:30 AM   #3
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Originally Posted by austinmueller99 View Post
I have stock gears, so should I use the 3.27 ratio or would increasing the ratio help with acceleration?
If you have a manual trans, changing the gear ratio in the tune will affect nothing aside from the speedometer

that setting is there to correct the ECM for a physical gear ratio change
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Old 01-15-2013, 10:50 AM   #4
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it will make the speedo move faster/slower but thats about it
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Old 01-15-2013, 11:04 AM   #5
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This option allows you to adjust in case you changed to a different ratio of rear end gear.If you put a different ratio gear in the rear end the speedometer and odometer
will show wrong speed and mileage.In case of a automatic transmission,if you don't
adjust for this you could possibly damage the transmission,as it affect shift points and
rpms.You always want to make sure the gear ratio is correct as your odometer and
speedometer be wrong.
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Old 01-15-2013, 11:07 AM   #6
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dont they do "rotations per mile" instead of just the gear ratio~ thats how my friends on SCT tuner did on his 08. He tried the gear change but it didnt work so he did rotation by miles.
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Old 01-15-2013, 11:25 AM   #7
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dont they do "rotations per mile" instead of just the gear ratio~ thats how my friends on SCT tuner did on his 08. He tried the gear change but it didnt work so he did rotation by miles.
The axle ratio should always match whats in the car and not be used to adjust the speedo.
The rotation by miles for the tires affects the speed/mileage. It should be used for correcting speedo. The best way is to actually measure the distance from the ground to the center of the wheel and use that radius to calculate your rotation value. This may be different than what the tire manufacture claims, since the rim width and tire pressure will affect tire height.
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Old 07-06-2013, 11:43 AM   #8
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AustinMueller,

Depending on your Transmission and what Factory options the car was built with, you have either 3.31's or 3.55's. Those gears are pretty tall and I definitely recommend getting a 3.73 or 4.10 in there! Gears are one of the most beneficial mods you can do in my opinion.

You'll notice a huge gain in Acceleration and Low End Torque! We can also adjust for your speedometer within the Tune. So just let the Bama team know what gears you're installing and will gladly hook you up!

I hope this helps. Let me know if you have any questions or need some assistance. Our Bama Performance tuning specialists are here in the building Monday-Friday from 9AM-5:30PM EST and Saturday 9AM-5:30PM EST. You can hit them up directly at 888.226.9764 and they'll get you squared away!

-Dan
I am trying to determine which modification would be better for my DD 08 GT Auto. High stall torque converter or going from 3.31 to 3.73 or 4.10. I have zero mods currently but will be ordering the JLT/SCT Bama tuner combo this weekend. Looking for best torque possible for off the line accel. I don't fully understand how the stall torque converter works
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Old 07-06-2013, 12:35 PM   #9
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I am trying to determine which modification would be better for my DD 08 GT Auto. High stall torque converter or going from 3.31 to 3.73 or 4.10. I have zero mods currently but will be ordering the JLT/SCT Bama tuner combo this weekend. Looking for best torque possible for off the line accel. I don't fully understand how the stall torque converter works
I'm looking for the same thing mod wise but you might want to add better tires, LCA's and UCA's to the list. It won't be as fun if the car sways left to right or your wheels keep spinning going nowhere like when a cartoon character is running in one spot until taking off...
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Old 07-06-2013, 04:28 PM   #10
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I am trying to determine which modification would be better for my DD 08 GT Auto. High stall torque converter or going from 3.31 to 3.73 or 4.10. I have zero mods currently but will be ordering the JLT/SCT Bama tuner combo this weekend. Looking for best torque possible for off the line accel. I don't fully understand how the stall torque converter works
A hi stall torque converter would be one of the last mods I would do on a daily driven street car they are great at the track but they suck on the street for a daily driver I would do gears and other mods first I would not even think about a torque converter until you have all the bolt on's plus cams just my .02
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Old 07-07-2013, 08:05 AM   #11
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A hi stall torque converter would be one of the last mods I would do on a daily driven street car they are great at the track but they suck on the street for a daily driver I would do gears and other mods first I would not even think about a torque converter until you have all the bolt on's plus cams just my .02
Agreed
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Old 07-07-2013, 10:00 AM   #12
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Stall converter

Thanks that is very helpful. I'll do the CAI and Tuner then most likely wimp out and get the 3.73. I get conflicting information on what is better for an auto with daily long highway commutes. I'd like 4.10's but don't want it to be too much for my wife to drive
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Old 07-07-2013, 10:21 AM   #13
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Thanks that is very helpful. I'll do the CAI and Tuner then most likely wimp out and get the 3.73. I get conflicting information on what is better for an auto with daily long highway commutes. I'd like 4.10's but don't want it to be too much for my wife to drive
Lol yea, I let my wife drive it on weekend errands, but when I change the gears and tune it to be very aggressive Im not going to let her drive it ... " just to be safe "
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Old 07-07-2013, 11:23 AM   #14
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Lol yea, I let my wife drive it on weekend errands, but when I change the gears and tune it to be very aggressive Im not going to let her drive it ... " just to be safe "
Mines an auto with 4.10s not bad to drive unless trying to back up. With the cai and 93 hybrid tune it's real froggy in reverse. Can't use the gas, you just let it reverse on its own. I would think with a manual you could control it more, but with the auto it just wants to break lose.
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Old 07-07-2013, 11:46 AM   #15
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I just ordered the JLT/SCT combo 2 minutes ago from AM. I assume I will get an email asking what tunes I want and specifics on my mods (none). I like the concept of the HYBRID tunes so I can get so low end torque and top end. We can get gas from 92 to 94. Any suggestions on what tunes you prefer and why would be MOST appreciated.
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Old 07-07-2013, 11:54 AM   #16
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Mines an auto with 4.10s not bad to drive unless trying to back up. With the cai and 93 hybrid tune it's real froggy in reverse. Can't use the gas, you just let it reverse on its own. I would think with a manual you could control it more, but with the auto it just wants to break lose.
Man I was wondering About that cause I plan on getting 4.30 or 4.56... Kinda why I don't plan on letting my wife drive it when I install that much gear. I want to take her to the track soon but not until she's ready ....

---------- Post added at 11:54 AM ---------- Previous post was at 11:52 AM ----------

Quote:
Originally Posted by Blackcat08 View Post
I just ordered the JLT/SCT combo 2 minutes ago from AM. I assume I will get an email asking what tunes I want and specifics on my mods (none). I like the concept of the HYBRID tunes so I can get so low end torque and top end. We can get gas from 92 to 94. Any suggestions on what tunes you prefer and why would be MOST appreciated.
Everybody is different and Congrats!!! On your purchase, but I'm going all out with my baby I want the most aggressive options that's street legal
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