First question,are auto tranni's allowed in the street class?

As far as swapping out a my little 5 speed for a Big Auto Tranni with a good stall.What do most of the fast rotary guys use?

Something thats gonna support 600 or so hp.

ps,I have a 3rd gen

 

Yes, autos are allowed in street tire class. Most of the fast rotary guys and import dragsters in general use sequential trannys, gforce, liberty, etc.

 

i am running a th 350 in my outlaw/modified fd . it has a 6000 stall with a trans brake and makes 25 psi on the trans brake!!! it took me 3 convertor companies before i found one that gave me a convertor with only 6-8% convertor loss ( this is unheard of but true). i love it...leaves the line hard as hell!!

 

How reliable is that tranni,was it hard to make the plate connecting the tranni to the motor?

Thanks Marcus

 

Head over to http://www.turbobuick.com , and look in the transmissions section. There is a guy named WE-4 that will work with any applications. Mainly deals with 2004Rs. I asked him if you could accomplish this, and he said no problem.

MPH for 2004R w/ 9000 rpm redline, 24.85" stock tire height, and 4.33 final are:

1st = 56 MPH
2nd = 97 MPH
3rd = 153 MPH
Overdrive @ 60 MPH = 2350 RPM

If you will use the car on the street at all, I would highly recommend an OD gear, as it will be like driving in 4th gear on the freeway all the time.

 

You mean like driving in 4th gear all the time, if you don't get the overdrive. Right?

Jeez 2350rpm at 60... I'd never use that gear! OTOH that means you can go with deeper gears. Can you get gears deeper than 4.33? I know for the 7" rear found in 1st-gens you can go to the junkyard and find a certain Kia SUV and get 4.778 gears, or 4.444's out of a Miata or certain pickups, or call up Mazdacomp and get 4.88 or 5.13's...

 

Right

You say you'd never use it but you would! First, most people cruise at like 75 mph. So using a 4.88 gear like you mentioned with no OD, that's ~5000rpms cruising! My friend with a very modded g-body, has a TH-350, and he hates driving his car because of it! No gas mileage on the highway. I mean he gets no gas mileage anywhere, but he's down like 15 bucks each time he goes across town

Anyways, 4.88 gear would put you @ 136 MPH final gear, so that's perfect. I was un-aware that people sold gears other than 4.33 for our cars

 

But rotaries love to rev. 5000+rpm cruise speed is nothing. Heck I did it all the time in my 12A SP, flying along in 4th gear, and still get MPG in the mid-20s. I could have used 5th gear but then, well, there's all that downshifting to pass... I don't like to run the engine for long periods of time under 4000, which is awful fast in 5th.

Those gears are for the 7" rear, which is found in the N/As. I don't know how well they'd last in a high powered drag racing environment. (apparently they fare OK with high power road racing...) The Turbo models (T2 and FD) have separate variants of the Mazda 8".

 

How reliable is that tranni,was it hard to make the plate connecting the tranni to the motor?

Thanks Marcus

the tranny is indestructable and cheap 1300 fully built and the convertor was 800. we ran the same tranny on a firebird last season and did not break it, the car lefet the line with the tires in the air and 1.34 60's in a 3300 lb car!!

the adapter plate on the other hand was/is a bitch! i am still getting the bugs out of it. the chevy starters do not spin very fast and makes it hard to start a rotary but i will have it sorted out soon

 

I'm in the process of finding a tranny right now also.....started looking around for my friends Supra and decided to look myself.

 

Here in Aus we call autos, big black hp holes. A back to back on my RX3 seen nearly 3tenths and 8mph gain changing from a 3 speed C9 auto(full roller bearing) to a clutched 4speed Jerico. Costs just as much and can take many attempts to get the convertor right. Theoretically should require a convertor change every time you alter your boost. I wont do it again.
Regards-Anthony

 

If it was a 5-speed the performance would have increased even more!
The trend lately here among the V-8 crowd have been to move away from autos in general. More and more 5-speeds are showing up even among the hardcore bracket racers.
The clutchless 5-speeds have become more readily available to everyone and have proven their consistency along with the performance gains.
An interesting variation of both the auto and manual transmission would be the 'Bruno tranny'.
The Bruno tranny is basically a manual 3-speed clutchless G-force that use a torque converter instead of a clutch. The Bruno setup can also be mated to basically any manual transmission. It's very popular among the Pro-Mod racers where getting the right clutch combination have proven to be a mystery or disaster to some individuals! I guess you can say the Bruno design is the best of both worlds!

Transmission Sources--->

Bruno' Automotive Products Inc.
14A industrial Rd.
Addison, IL. 60101
Ph# 630-458-0043

G-force Racing Transmissions
1525 North State Rt. 934
Annville, PA. 170003-8925
Ph# 717-867-4352
g-forcetransmissions.com

Jerico Performance Products
2208 Pitts School Rd.
Concord, NC. 28027
Ph# 704-782-4343
jericoperformance.com

Liberty Gear
6390 Pelham Rd.
Taylor, MI. 48180-1356
Ph# 313-278-4040
libertysgears.com

Lenco Equipment Co.
6470 Federal Blvd.
Lemon Grove, CA. 91945
Ph# 619-287-2500

Richmond Gear
1208 Old Norris Rd.
P.O. Box 238
Liberty, SC. 29657
Ph# 864-843-9231
richmondgear.com

TTC Tremec
4080 Bennett Rd.
Toledo, OH. 43612
Ph# 800-401-9866
ttcautomotive.com

Jeff Co. Pro Street Transmissions
2711 Elyssee St.
San Diego, CA. 92123
Ph# 619-441-7344

crispeed
87 Rx-7 TII
9.204@150.47mph
2600lbs
un-tubbed

 

Crispeed: what a completely thorough post!!! You are the man! Did you get my last PM? I didn't hear back from you....