4.778 Final Drive For $296
12-10-2005, 02:49 PM
#179
Momentum Keeps Me Going
This thread came to mind when I read the new C&D. Could this be a 'factory' answer to get a RX-8 performance difffernetial? 
Anyone have more info?
--------
C&D has a blip on the Mazdaspeed 6 in the 1/06 issue and said it's US intro was delayed while "US product planners decided to hasten its 1/4mile times w/ the lower gear ratios intented for the European version." The answer was "dropping the 5th & 6th gear ratios plus the final drive..." and this was done "...to the reinforced Mazda RX-8 limited slip rear differential."
But the question though...what IS the MS6 rear drive ratio? And will it just be something we could purchase and drop in?
Ummmm....
Anyone have more info?--------
C&D has a blip on the Mazdaspeed 6 in the 1/06 issue and said it's US intro was delayed while "US product planners decided to hasten its 1/4mile times w/ the lower gear ratios intented for the European version." The answer was "dropping the 5th & 6th gear ratios plus the final drive..." and this was done "...to the reinforced Mazda RX-8 limited slip rear differential."
But the question though...what IS the MS6 rear drive ratio? And will it just be something we could purchase and drop in?
Ummmm....
12-10-2005, 04:45 PM
#181
Bummed, but bring on OU!
Originally Posted by Spin9k
But the question though...what IS the MS6 rear drive ratio? And will it just be something we could purchase and drop in?
msp6 final drive:
1-4: 3.941
5,6,R: 3.350
12-10-2005, 05:43 PM
#185
Bummed, but bring on OU!
Originally Posted by QBallz
How are there 2 different final drives 
12-10-2005, 06:01 PM
#186
Momentum Keeps Me Going
Huh? The final drive ear on the MS6 is 3.350 or 3.941 
NOT.
therm8, plain CS says there's a single gear ratio for the rear end. Whatever it is, if it's a lower gear than the current 8 is part of the question. Does anyone know the answer as I've looked everywhere and I can't find that detail a spec. I don't want the overall geardown, just the rear end gear ratio.
NOT. therm8, plain CS says there's a single gear ratio for the rear end. Whatever it is, if it's a lower gear than the current 8 is part of the question. Does anyone know the answer as I've looked everywhere and I can't find that detail a spec. I don't want the overall geardown, just the rear end gear ratio.
12-10-2005, 08:24 PM
#187
Bummed, but bring on OU!
Straight from mazdausa.com under Specs:
Type
All-Wheel Drive (AWD)
Transmissions
6-speed manual
Clutch type
Single dry plate with diaphragm spring
Transmission ratios (:1)
1st 3.538
2nd 2.238
3rd 1.535
4th 1.171
5th 1.085
6th 0.853
Reverse 3.831
Final Drive 1st - 4th 3.941
5th, 6th, Rev. 3.350
Type
All-Wheel Drive (AWD)
Transmissions
6-speed manual
Clutch type
Single dry plate with diaphragm spring
Transmission ratios (:1)
1st 3.538
2nd 2.238
3rd 1.535
4th 1.171
5th 1.085
6th 0.853
Reverse 3.831
Final Drive 1st - 4th 3.941
5th, 6th, Rev. 3.350
Last edited by therm8; 12-10-2005 at 08:26 PM.
12-10-2005, 08:28 PM
#188
Momentum Keeps Me Going
Originally Posted by therm8
Beats me. But that's what mazdausa says.
but looks as if the MS6 is no help anyway....too bad 
. Thanks for digging it up 
12-11-2005, 09:37 AM
#189
Stuck in a love triangle
Will the speedometer still be accurate with this mod?
Also, can Fab 8 or whoever else has this mod post a video or time slip for us?
I am curious to see how much faster you get through the gears.
Also, can Fab 8 or whoever else has this mod post a video or time slip for us?
I am curious to see how much faster you get through the gears.
12-12-2005, 04:31 AM
#190
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Originally Posted by JeRKy 8 Owner
Will the speedometer still be accurate with this mod?
Also, can Fab 8 or whoever else has this mod post a video or time slip for us?
I am curious to see how much faster you get through the gears.
Also, can Fab 8 or whoever else has this mod post a video or time slip for us?
I am curious to see how much faster you get through the gears.
12-12-2005, 09:01 PM
#191
Stuck in a love triangle
Originally Posted by Fab 8
Sorry, there's no quarter mile track (heck, there's no track at all) where I stay!
12-16-2005, 08:38 PM
#196
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Some extra details before I install this Sunday.
This is in addition to the 4.10 they are offering in the swap. The only other 3.9's that are available are these described in Felix's Mazda Gear Interchange Chart:
Vehicle, Years, Ratio, Notes
RX-2, '71-4, 3.900
RX-7 12A, '79-'85, 3.909, & 6-speed Miata
RX-7 12A, '84, 3.933, part year
B-xx00 Pickup, '87-8, 4.444, 4WD M/T
I doubt the 3.9 is from the RX-2, and the 4.444 uses the exact same pumpkin as the Kia 4.778 4WD M/T that the S2000 guys are using - on the S2000 blogs the front differential in the Kia is in fact the 1st gen RX-7 pumpkin. Therefore these are all short pinion shafts from the 1st gen RX-7 and the 4.778 should hypothetically fit.
But still, nobody knows, until this Sunday
PS I frigging drive way too fast in the RX8 on the highway, this will possible restrain my lead foot because of the increased HW mileage, forcing me by to drive slower
Originally Posted by Mazmart
I may offer a 3.9 also if there is a demand for it.
Paul.
Paul.
Vehicle, Years, Ratio, Notes
RX-2, '71-4, 3.900
RX-7 12A, '79-'85, 3.909, & 6-speed Miata
RX-7 12A, '84, 3.933, part year
B-xx00 Pickup, '87-8, 4.444, 4WD M/T
I doubt the 3.9 is from the RX-2, and the 4.444 uses the exact same pumpkin as the Kia 4.778 4WD M/T that the S2000 guys are using - on the S2000 blogs the front differential in the Kia is in fact the 1st gen RX-7 pumpkin. Therefore these are all short pinion shafts from the 1st gen RX-7 and the 4.778 should hypothetically fit.
But still, nobody knows, until this Sunday
PS I frigging drive way too fast in the RX8 on the highway, this will possible restrain my lead foot because of the increased HW mileage, forcing me by to drive slower
Last edited by Slick8; 12-16-2005 at 08:43 PM.
