4.778 Final Drive For $296
11-25-2005, 06:23 AM
#76
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if i were to get the 4.778 gear for acceleration, and then later decided that i want to go FI would the 4.778 gears still be better for acceleration or would i need to get smaller ones like stock or 4.1?
if you are going turbo dont change the dif gears.
Last edited by rotary crazy; 11-25-2005 at 08:35 AM.
11-25-2005, 07:12 AM
#77
Unless you want to go up to a 4.1 and have the best of both worlds. You could theoretically get better mileage than the normally aspirated crew at cruising rpms.
I may even provide a 3.9.
Paul.
I may even provide a 3.9.
Paul.
11-25-2005, 08:35 AM
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4.10 will give you better milage but I love the way the car feels with the 4.33 specially in the low rpm, so firts try the car with the 4.44 and then if you feel the need to upgrade go with the 4.10.
Last edited by rotary crazy; 11-25-2005 at 08:46 AM.
11-25-2005, 12:03 PM
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what I mean is, this is IMO this is a good solution to get better perfomance for the money. RB intake doesn't do **** and it affects gas milage.
better performance = worst gas milage. At least this one we can control it in a way.
better performance = worst gas milage. At least this one we can control it in a way.
11-25-2005, 02:42 PM
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ah ok got ya..was a lill lost at first...but it's hard comment on the preformance gains of changing to a 4.778 if no on has done it and posted up befor and after 0-60 of 1/4 mile......bu tit does seem liek it woudl be worth it i'd have to agree with you..seems liek this would be worth wild. 
11-25-2005, 05:01 PM
#82
My uncle has swapped rear ends in his Cameros and most recently his 50th anniversary Vette Z06. He says it is a night and day difference and believes it would drop around .6 off of quarter mile times to go with 5.13 (5.125) on our cars. That is significant dropping .6 seconds off of quarter.
I had brought up the 4.78 ring and pinion and he was the one who brought up the 5.13 as being even better.
I had brought up the 4.78 ring and pinion and he was the one who brought up the 5.13 as being even better.
11-25-2005, 05:49 PM
#83
as my name suggest's I have some experience with diff gears/ratios. Like everything the ratio has to be balanced to what you want to do. A lower diff number--- yea the car will have more snap to it---BUT if it causes you to have to shift where as before you didnt---hmmm then it may not be of benefit--it may actually hurt. I wish we had a "quick change" rear diff (I can wish at Christmas --right?). So guys from experience --if you gear it down and then have to take a long trip after meeting that babe that lives 200 miles away you may find the benefit is not worth the price.I hate buzzy cars.
One word of caution-- take care of the wheel hop issue before you do this.
If you want accleration then lowering the ratio will help.
Settle on your gear ratio before you do any aftermarket tuning.
Suggest also before you do this just try smaller rims/tires and see how you like it.
olddragger
One word of caution-- take care of the wheel hop issue before you do this.
If you want accleration then lowering the ratio will help.
Settle on your gear ratio before you do any aftermarket tuning.
Suggest also before you do this just try smaller rims/tires and see how you like it.
olddragger
11-25-2005, 10:25 PM
#84
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Originally Posted by rotary crazy
4.10 will give you better milage but I love the way the car feels with the 4.33 specially in the low rpm, so firts try the car with the 4.44 and then if you feel the need to upgrade go with the 4.10.
the rx8 is 4.444
11-27-2005, 10:28 PM
#89
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^how much would that cost..i'm sure there can't be to many places you can have that done. 
all i'm in agreement to make them stronger...but i wonder how much stronger the treatment will make the gears
all i'm in agreement to make them stronger...but i wonder how much stronger the treatment will make the gears
11-27-2005, 10:42 PM
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^^ $100. These are also the people that are behind Frozen Rotors.
http://www.diversifiedcryogenics.com...rtspricing.htm
http://www.diversifiedcryogenics.com...rtspricing.htm
11-27-2005, 11:27 PM
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hmmm maybe i should've asked if anyone has used a company that can do this....don't want to use someone (far away no less) and not be sure of their reliablility. etc. etc.
geuss i'll have to do some research. thanks for pointing me in some directions guys
geuss i'll have to do some research.
thanks for pointing me in some directions guys
11-29-2005, 06:52 AM
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Ok, I've got some pretty basic questions that need answering...
1) I have a 2004 M6 RX-8. That means the stock rear-end gears are 4.444, correct?
2) Higher gears, such as 4.778 would yield faster acceleration, correct?
3) Lower gears, such as 4.10 would yield slower acceleration, correct?
4) Is there anything special about our rear-end, that would make the swap any harder compared to the swap in say the rear end of a Mustang or Camaro? Will my performance shop have to do anything special if I buy the new ring and pinion, throw it and the car at them?
1) I have a 2004 M6 RX-8. That means the stock rear-end gears are 4.444, correct?
2) Higher gears, such as 4.778 would yield faster acceleration, correct?
3) Lower gears, such as 4.10 would yield slower acceleration, correct?
4) Is there anything special about our rear-end, that would make the swap any harder compared to the swap in say the rear end of a Mustang or Camaro? Will my performance shop have to do anything special if I buy the new ring and pinion, throw it and the car at them?
11-29-2005, 09:20 AM
#94
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Ok, I've got some pretty basic questions that need answering...
1) I have a 2004 M6 RX-8. That means the stock rear-end gears are 4.444, correct?
1) I have a 2004 M6 RX-8. That means the stock rear-end gears are 4.444, correct?
2) Higher gears, such as 4.778 would yield faster acceleration, correct?
3) Lower gears, such as 4.10 would yield slower acceleration, correct?
4) Is there anything special about our rear-end, that would make the swap any harder compared to the swap in say the rear end of a Mustang or Camaro? Will my performance shop have to do anything special if I buy the new ring and pinion, throw it and the car at them?
11-30-2005, 11:37 PM
#96
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Just ordered from Kia $325 w/ shipping, comes in next week... Found a few Sportages in the salvage yards but the prices were for the entire front pumpkin at $350 the lowest.
Called Fountainhead Cryogenic Processing for treating the 4.778 ring and pinion, $5/lbs. Good insurance for the price.
Rick Heasel who resells the Kia 4.778 gears for the S2000 folks just gets them polydynned.
Anybody got a parts diagram for the RX-8 pumpkin? I also need the torque specs.
Called Fountainhead Cryogenic Processing for treating the 4.778 ring and pinion, $5/lbs. Good insurance for the price.
Rick Heasel who resells the Kia 4.778 gears for the S2000 folks just gets them polydynned.
Anybody got a parts diagram for the RX-8 pumpkin? I also need the torque specs.
Last edited by Slick8; 11-30-2005 at 11:54 PM.
