Well, not exactly cheap, but it is less expensive than the HKS 6-speed, and it will vastly improve the strength of the internals of the transmission...

http://www.quaifeamerica.com/gears/rx7.htm

 

Wouldnt that weigh a bit more and does it fit in the stock case??

 

Interesting.
It looks like the 6th gear change system that greddy had on their Japanese site.

Do these guys make their own kits?

 

"Requires minor modifications to center and rear cases "

 

The ones Trust (Greddy) sells are exactly this, they are made by Quaife.

 

can someone explain dog cut or straight cut gears for me ... never researched it before.

 

same thing that i was going to ask....

whats the difference in synchromesh vs dog type engagement

i know usually first gear and reverse are straight cut gears but i dont know the reason/theory behind it

thanks

 

Simple. Straight cut = easy crunching of gears. The gears are a LOT stronger than meshed gears, but it takes more skill to shift perfectly with as little crunching as possible.

 

In answer to your first question...

Do I want a 6 speed in my FD?? Yes..

Do I want to pay close to 7k for it??? No..

 

does anybody have a website that lists the stock ratio's for the FD's 5 spd?

 

www.supercars.net

 

I don't know of a website of hand but I think these are close to the FD stock gears:

3.48
2.02
1.39
1.00
.72

If anyone knows these are wrong please correct me.

 

Yeah just checked with that site above, thoes are the stock gears.

 

cool, thanks guys, ONE more question- what mathmatical equation do I use to re-calculate road speeds for every gear based on a stock 4.11 rear end and 8000 rpm window

 

Read my posts in this thread...

https://www.rx7club.com/forum/showth...ght=speed+gear

 

thanks Jim, as always you prove to be a wealth of information-

 

Really? I was just accused on the "big" RX-7 mailing list of being able to "impress the teenagers on the forum, but the big list is a tougher crowd" by one particular ******* who's had a problem with me for about... 4+ years.

 

this 47 year old teenager is impressed with anyone educating him. Thanks !

 

jimlab- I think one of the reasons I hardly ever go to the big list anymore is the rudeness of some of the people there. One of the first times I logged on, there was some one ragging on you for some petty reason. I could not believe that in a group of people that was supposed to be interested in a particular car, there could be such bickering. Takes all kinds, I guess.
Ron A (not a teenager since 1966)

 

you can't please everyone

 

Jim

I have tried to buy the gearset for the turbo tranny and they are not selling them. They have an agreement with greddy or hks and we have to buy it through them, =big money.

I went with housemanautosport.com, and got the same thing ina 5 speed.

oR WAIT AND GET THE RX8 TRANNY.

wouter

 

Well, what if there were a Tremec T56 adapter plate and flywheel for the rotary?

 

I think thats been rehashed as well... the t-56 loses its efficiency/effectiveness after 6000 rpm. But being that it is a "common" tranny there might be a better and cheaper source of changing out gear ratios?

I know for a fact that there is a rotary speed shop in Cali that mates the t-56 to the 13bs--they have it in their 1st gen race car. They make adapters for 1st and 2nd gen. Long ago I inquired about them making it for the FDs but there was no demand. Just can't seem to find their website anymore *tear*

 

Straight cut gears are also loud as well. Have you ever noticed the noise your car makes in reverse. this is because the reverse is a straight cut gear. they like to wine a lot and in some grand prix cars, I have heard, in the cabin the tranny is louder than the engine going down the track.

 

Chechk out this site for a sh__ hot gear set tranny for an FD, not 6spd but with this kit who cares!www.gurumotorsports.com