NoPistons -Mazda Rx7 & Rx8 Rotary Forum

NoPistons -Mazda Rx7 & Rx8 Rotary Forum (https://www.nopistons.com/)
-   20B Forum (https://www.nopistons.com/20b-forum-51/)
-   -   6 speed 20b? (https://www.nopistons.com/20b-forum-51/6-speed-20b-62263/)

rx-7Drifter 10-19-2006 01:17 AM

ok so i have a few questions lol...can you mount a rx8 trany on a 20B and can you put a rx8 trany in a FC? just wondering i would like a 6 speed when i get done but if its not possible its cool lol thanks for any segguestions and info.

To_slow 10-19-2006 06:35 AM


Originally Posted by rx-7Drifter' post='841482' date='Oct 18 2006, 10:17 PM

ok so i have a few questions lol...can you mount a rx8 trany on a 20B and can you put a rx8 trany in a FC? just wondering i would like a 6 speed when i get done but if its not possible its cool lol thanks for any segguestions and info.

Yes you can with some fab work . Now if your 20b is going to be boosted you are going break the trany very easy .

Good Luck

Jeff20B 10-19-2006 01:11 PM

You don't necessarily need a 6 speed with a 20B. The torque allows for a taller geared diff and a strong 5 speed. You could probably get away with a 4 speed.

rx-7Drifter 10-19-2006 01:55 PM

ok cool...im building it to try and hang with the top end supras...figured a 6 speed would help lol...but if i dont need one then cool lol thanks for the help guys https://www.nopistons.com/forums/pub...IR#>/smile.png

j9fd3s 10-19-2006 11:12 PM

if you look in the engine section, ive got pics of the rx8 tranny apart.



1. i dont think it can handle enough power for a "top end supra" maybe its goot for like 350-400ish?



2. the shifter is 2" further forward, so the trans has to move back, driveshaft needs to be shorter etc etc



3. it bolts right up to the engine like a stock t2 trans



4. its pretty close ratio, so you can run a peakier engine with it, the 20b, has a nice big broad powerband, might not be a good match... you need to figure our what your power curve is gonna be like, and then look for a trans

rx-7Drifter 10-20-2006 05:09 AM

thanks man thats good info https://www.nopistons.com/forums/pub...IR#>/smile.gif now i know more at what im looking at and for thanks agian https://www.nopistons.com/forums/pub...IR#>/smile.gif

iceblue 10-31-2006 11:59 AM

A 20b will blow the FE tranny apart. The finaly gear seting in the tranny is nearly identical to the rx7. 5th gear is same as fourth and you just move 1 and 2 closer what good does that do?


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