I just ordered a set of 4.33 gears for my R1 from Mazdaspeed. Anyone have them, opinions?

The main reason I wanted to go with the 4.33s is that I auto-x my car a lot and on the courses we usually run are almost entirely in 2nd gear. Many times 2nd gear is too tall but 1st is too short and jumpy. Shifting back and forth between 1st and 2nd also upsets the car.

 

on this subject, what is the rev speed at @80mph, 4.33 rear, stock tire size, 5th gear.

 

My favorite speed calculator:

http://www.mysportscar.com/tools/topspeed.htm

Keep in mind that diferent tire manufacturers may have slightly different tire diameters even if the same size tire. It shouldn't make much of a difference in the big picture.

Doc

 

I think you can just to a straight calculation and figure it out. 4.33/4.1 * rpm @ 80mph now.

 

ok sorry to hijack the thread more,

stock 5th (0.719)

4.77 @3200 = 69mph
4.33 @3200 = 76mph
4.10 @3200 = 80mph

4.77 @3500 = 75mph
4.33 @3500 = 83mph
4.10 @3500 = 87mph

@8k in 5th
172
190
200

with j-spec 0.806 5th

4.77 @3200 = 61mph
4.33 @3200 = 67mph
4.10 @3200 = 71mph

4.77 @3500 = 67mph
4.33 @3500 = 74mph
4.10 @3500 = 78mph

@8k in 5th
153
169
179

 

Originally posted by turbojeff:

I have them in my GTUs and recently switched in my FD. They are worthless, unless you like starting fast.
Ron A.

 

Thanks for the thoughts. Anyone else here have them, anyone auto-x?

 

1st gear is short enough with the 4.10s i cant imagine 4.33s

 

yeah no kidding. I'm thinking of going to 3.9 gears to make 1st and 2nd more usable.

 

I bought a set of 4.33 gears from Racing Beat and they are awesome but then again I also installed a KAAZ diff.
They run awesome
love it.
not too rough


93 FD

 

Huero- Do you notice a substantial difference with your Kaaz rear? I really have to pay attention to hard first gear standing starts, otherwise the Torsen rear just seems to be overcome and sends the power to one wheel and then there is just a pile of smoke. I like the added oomph that the lower gear gives, but would like a little more control over it.
Ron A.

 

Besides the slight clunking noise it does while doing slow turns it feels fine. I really dont notice anything @ 1st gear standing starts. But I did my pillowball bushings and it eliminated alot of the wheel hop I had before. I think that is what blew my stock diff in the first place.

 

double post :S

 

What are the stock gear ratios?

 

4.10's

 

4.3...lol...imagine driving a 4.7 final...talk about getting bad gas mileage.

 

yup

 

I have them and got them to compensate for the 275/40/17 tires I was running in the rear.

 

Can someone break down the gear ratios for each of the 5 gears for me? I know I've seen it somewhere but can't find it.

 

Good Point. Everytime someone slaps a set of 17s-18s wheels with a tall tire, it's going to screw-up the final gear ratio. It will make the ratio higher, making the car lose a little acceleration on the bottom end.

 

MT:
1st 3.483
2nd 2.015
3rd 1.391
4th 1.000
5th 0.719
Final 4.100

AT:
1st 3.027
2nd 1.619
3rd 1.000
4th 0.694
Final 3.909

 

I currently have a 5 spd with 3.90 and 18's. Would you recommend 4.33 or 4.77? I don't care about the gas mileage I just want to be faster in 1st and 2nd gear. With those gears would it possibly cause me to get less traction in those low gears? I have stock motor and twins with all the bolt-ons and chipped ecu.

 

what tire size are u running?

 

how did you get a 5speed with 3.9's did you do a conversion from auto?

 

some people want to try to break the 200MPH mark