Erik Sweden

Does anyone have facts or personal experience from road racing what the difference is between the OEM K20A and the Quaife ATB?
I have a dedicated trackday K20EG (featured on Hybrid racings homepage) that I currently run a EDM K20A2 transmission with a Quaife ATB, but I may be in the process of making a switch with a guy to get a JDM K20A transmission with a CR-V FD on it.

Pros and cons would be greatly appreciated since I donīt have any experience of them both. My only interest is how they compare on a track, I donīt care about daily driving input.

Stinkycheezmonky

I don't know about the Quaife diff, but what are the gear ratios like for the EDM trans you have? If that's like the US K20A2 trans (I don't remember the K-series tranny designations), just going to the better gearing of the K20A may be worth it. Having driven both of those transmissions, the R-box is significantly different and better.

Erik Sweden

JDM EDM
3,266 same
2,130 same
1,517 same
1,212 1,147
0,972 0,921
0,780 0,738

FD EDM: 4,764
FD CR-V: 5,062

Iīm also quite convinced that the JDM/CR-V combo is way, way better than the EDM/EDM combo in terms of gear ratios for road racing. Thereīs no question aboput it. The question is if the JDM ATB is ok for my needs, so I donīt end up having to invest in a Quaife ATB again, cause that would make this a very costly deal for me.

KIWI

We have been running the 5.062 final drive in our K-20 Powered DC2 Integra since 2004.
The acceleration advantage over the 4.764 is quite noticible.
You might want to consider the Newly released K-Series GEAR-X Close Ratio Gear kit which coupled with the 5.062 Final Drive gave us quite a difference in lap times, going from consistant 2.0 min laps down to 1min 56.5 sec. Three and a half seconds I thought was pretty incredible! We will probably go faster with more seat time.
Check it out on www.specialprojectsms.com /Gear-x

If you are serious about Racing go for a good Kaaz or Cusco or Quaife Clutch type LSD. Stay away from Gear type or the el cheapo Chineese/Taiwaneese copies. You get what you pay for.
Gear-x will be releasing an affordable, Real competition Plate type LSD in 2009


Kiwi

Erik Sweden

Thanks for the tip, Iīll analyze that gear ratio setup and see whatīs what. Have to compare it to the others Iīve looked at.

B18C7ITR

Nice improvement, seriously consider this for our DC5 track car

For a mix of street/track use, would you still recommend a plate type lsd? Which gear type to stay away from? I know the Quaife is rated highly?

Justin3

To answer your original question, there is a night and day difference between the quaife and the stock units imo. Right out of the box had at least a 2 sec. lap time difference from the old transmission I had which the only difference was the quaife. That was first time out in the car after not driving for about a year.

I'd say that if you aren't going to go to a clutch type and keep up on your maintenance of it then the quaife is the way to go. You will be dissapointed going back to a stock unit after running your quaife.