Just wondering if anyone has had any experience with this and if its a direct fit? I was told the rx8s have a higher gear ratio which could benefit the FD in the 1/8th mile....?

 

They fit. What rpm are you passing through the traps at?

 

Search, I have an extensive post on this topic.

Dale

 

^ how about a link for any future googlers

 

not sure on the rpm maybe around 7k.... the car is trapping around 114 in the 1/8th

 

Dale Clark did a great writeup on the RX8 gearset in the FD.

Dale, I see that you mentioned this already, but it was a great writeup so I thought I'd
put a plug in for the work you did.

Regards

 

That is fast, don't know if the lower gears will help. If you lower the rear gears (4.10 vs 4.44) you might have to shift right at the traps if you go any faster.

 

wow 114 is fast! my friend ran a 6.0 at 114 in his rx7.... auto ls1 turbo rx7.

 

True. Do you know if all rx8s came with 4.44s?

 

searching now Dale. thanks!

 

found it nvm. thanks

https://www.rx7club.com/3rd-generati...os-you-984896/

 

i wish i knew what 3rd gear would go to with the 4.44 or 4.77 gears.... anyone?

 

I'd LOVE a set of 4.44 or 4.77 rear gears in my automatic FD...
Thats one of my next to-do things, if I can find some time.

 

With stock tires 3rd will top out at (8000 RPM):

4.44: 95.89
4.77: 89.25
(edited post, I had typed in the wrong #s)

I have 4.77 in my car, with a Carbonetics Limited Slip.

4.77 with a reasonable sized turbos makes for very little turbo lag at low speeds (autox car)

rpm_speed -aspect_ratio 50 -tire_width 225 -wheel_size 16 -redline 8000 -differential 4.44

Differential : 4.44
Wheel Size : 16 inches
Tire Width : 225 millimeters
Tire Height : 24.865 inches
Aspect Ratio : 0.5
Revolutions per mile: 811.1052251718
Rolling Length : 78.11563535
Redline : 8000

RPM 1000 2000 3000 4000 5000 6000 7000 8000
1st: 4.79 9.58 14.36 19.15 23.94 28.73 33.51 38.30
2nd: 8.25 16.50 24.74 32.99 41.24 49.49 57.73 65.98
3rd: 11.99 23.97 35.96 47.94 59.93 71.92 83.90 95.89
4th: 16.66 33.32 49.98 66.64 83.30 99.96 116.62 133.28
5th: 23.17 46.34 69.52 92.69 115.86 139.03 162.20 185.38

30 40 50 60 70 80
1st: 6266 ----- ----- ----- ----- -----
2nd: 3637 4849 6062 7274 ----- -----
3rd: 2502 3337 4171 5005 5840 6674
4th: 1800 2400 3001 3601 4201 4801
5th: 1294 1726 2157 2589 3020 3452

rpm_speed -aspect_ratio 50 -tire_width 225 -wheel_size 16 -redline 8000 -differential 4.44

Differential : 4.77
Wheel Size : 16 inches
Tire Width : 225 millimeters
Tire Height : 24.865 inches
Aspect Ratio : 0.5
Revolutions per mile: 811.1052251718
Rolling Length : 78.11563535
Redline : 8000

RPM 1000 2000 3000 4000 5000 6000 7000 8000
1st: 4.46 8.91 13.37 17.83 22.28 26.74 31.19 35.65
2nd: 7.68 15.35 23.03 30.71 38.39 46.06 53.74 61.42
3rd: 11.16 22.31 33.47 44.63 55.78 66.94 78.10 89.25
4th: 15.51 31.02 46.52 62.03 77.54 93.05 108.56 124.06
5th: 21.57 43.14 64.71 86.28 107.84 129.41 150.98 172.55

30 40 50 60 70 80
1st: 6732 ----- ----- ----- ----- -----
2nd: 3907 5210 6512 7815 ----- -----
3rd: 2688 3585 4481 5377 6274 7170
4th: 1934 2579 3224 3868 4513 5158
5th: 1390 1854 2318 2781 3245 3709

 

Thanks for the Info!

 

I just cracked open a `04 RX8 MT rear end and it had a 4.0 in it. I'm assuming that I should have bought an auto rear for the 4.44

Just in case you guys are wondering, I counted it a few times with a state depression each time.

 

that doesn't sound right at all. I thought that all the S1 rx8s came with a 4.44 in the MT. and the S2's came with a 4.77?

 

OK, so I blame myself for taking the word of a mechanic. He did count it several times. After taking a look at the rear end again this morning, I pulled out the rx8 box and took a recount. IT IS 4.44!!! So happy now

After going home last night a bit disappointed, I pulled up all the info I could to see that a 4.00 was never made. I knew the ring gear was 40 so it would make sense that the pinion gear is 9.

Gotta love this forum for all the info it provides.

Now to order some diff bearings... Small island = no parts for rx7 on island. ugh

 

You may not have a manual trans diff. Also, foreign RX-8's may have had different gearing options.

Dale

 

Everything checked out fine. It's definitely a 4.44 Ring & Pinion. Came out of a USDM RX8 courtesy of Ebay