How this idea? 20B + RX8 Transmission

Renesisking · 06-01-2010, 02:06 PM

wow, i didn't think it was that much of an issue. How hard is it to not push it further or to fully keep the clutch in until it goes into gear? What is the final drive ratio in the FC/FD? I know the RX-8 has a 4.44 and the second gen has a 4.77. Suppose I did do this swap and kept the stock 8 tranny, would it be fine with the stock 4.44? I think Motortrend had an article where they tested the R3 RX-8 which had the 4.77 gear ratios and they said that other than straight line performance it wasn't any benefit, and that around a track or autoX the older tranny/diff setup was more beneficial and had the right ratios to get the job done.

***TitaniumTT*** · 06-01-2010, 06:16 PM

Quote:

Originally Posted by Renesisking

wow, i didn't think it was that much of an issue. How hard is it to not push it further or to fully keep the clutch in until it goes into gear?

Pushing it too far is only one issue. It over extends the hub and bing.... The other issue is idiots grabbing hard and the sync not being fast enough, or the force being too hard and the hub tweaks and bing...

Quote:

Originally Posted by Renesisking

What is the final drive ratio in the FC/FD? I know the RX-8 has a 4.44 and the second gen has a 4.77.

Gear ratio's in non auto FC/FD are 4.11:1 with a few exceptions.

Quote:

Originally Posted by Renesisking

Suppose I did do this swap and kept the stock 8 tranny, would it be fine with the stock 4.44? I think Motortrend had an article where they tested the R3 RX-8 which had the 4.77 gear ratios and they said that other than straight line performance it wasn't any benefit, and that around a track or autoX the older tranny/diff setup was more beneficial and had the right ratios to get the job done.

What swap? The 20b swap? Yeah, it'll be fine. IIRC the 8's tires are taller as well which nessitated the higher ratio. A Renni tranny in a turbo or ported FC would be about damn perfect according to my math. We shall see though. But for an auto-x, it would be a JOY compared to the TII box. That thing is miserable for auto-x.... I fucking hate it.

06-01-2010, 02:06 PM	#1
Renesisking Rotary Fan in Training Join Date: May 2009 Location: Connecticut Posts: 39 Rep Power: 0	wow, i didn't think it was that much of an issue. How hard is it to not push it further or to fully keep the clutch in until it goes into gear? What is the final drive ratio in the FC/FD? I know the RX-8 has a 4.44 and the second gen has a 4.77. Suppose I did do this swap and kept the stock 8 tranny, would it be fine with the stock 4.44? I think Motortrend had an article where they tested the R3 RX-8 which had the 4.77 gear ratios and they said that other than straight line performance it wasn't any benefit, and that around a track or autoX the older tranny/diff setup was more beneficial and had the right ratios to get the job done. __________________ 2004 RX-8. I would love to tune it but can't find the right parts for Microtech