tC: sold ... lock
03-22-2012, 07:28 PM
#2
hmmm......I may know someone who is interested....pics? Also, is there a distinct advantage to having the O.S. Giken as opposed to the Quaife? Ive been trying to make up my mind between the two.
03-23-2012, 03:13 AM
#3
Info From Dezod website comparing OS Giken to TRD (Quaife)...
Scion Racing's own Dan Gardner review in comparison to the TRD Diff:
For those of you with the TRD, rest-assured you have a good, solid diff that will likely never break or cause you problems. We raced on it for 2 seasons with zero issues.
That said, a Quaife, Torsen, helical, or other gear type differential is literally NOT a limited slip diff. They are more accurately referred to as "torque-biasing." They are selected for their durability and seamless operation.
For cars making serious power, or for ANY type of performance application such as AutoX, time attack, road racing, a diff that actually locks is the ONLY diff you'll want to use. The performance is astonishingly better.
As last season wound down, it was probably our single biggest development goal, to work with a company to produce a true LSD that would lock-up hard, and further reduce or even completely eliminate wheelspin.
We selected OS Giken because of their reputation, especially in Japan. Road race cars in pro Japanese racing series have won championship with that type of differential. They also don't believe in 1.5-way units for FWD applications, as that will cause the car to push on turn-in. This is the last thing you want in a FWD car.
The units are 1.1-way, meaning they are open on turn-in, and only go to lock once power is applied. OS also uses more clutch plates than just about anyone in the world. Unlike other clutch-type diffs, they very infrequently need to be rebuilt.
This is all to say, we worked with Japan and the US arm to develop this differential. We tested more than one setup at the track in the off-season. The units are completely rock-solid. The fitment is near perfect, and it's somewhat imperceptible during normal driving.
Under spirited driving, this diff is second to none. It's virtually eliminated wheelspin, something that was still a problem with the helical unit. Throttle can be applied earlier and to a greater degree, which resulted in very real laptime reductions. The car is a rocket out of the corners now, and the power just gets down to the ground once locked up. Hills, rises, tight hairpins, nothing seems to affect the diff. It just works!
Unlike a helical, when one tire loses contact with the track surface, it still remains locked, sending power to the outside tire. This isn't the case with a helical. In the aforementioned scenario, the diff will act like an open differential and copious wheelspin will result.
OS is a great engineering company. Hardcore racers know their name, but they don't have a lot of marketing muscle here in the US. This really is a "best-kept secret" kind of thing. We're happy to bring the unit to market, and can't wait to hear what you guys and gals all think. This is a huge performance upgrade over the stock diff, and a big improvement over what was previously available.
The forced induction crowd really shouldn't be without it, and even NA cars can benefit significantly.
Scion Racing's own Dan Gardner review in comparison to the TRD Diff:
For those of you with the TRD, rest-assured you have a good, solid diff that will likely never break or cause you problems. We raced on it for 2 seasons with zero issues.
That said, a Quaife, Torsen, helical, or other gear type differential is literally NOT a limited slip diff. They are more accurately referred to as "torque-biasing." They are selected for their durability and seamless operation.
For cars making serious power, or for ANY type of performance application such as AutoX, time attack, road racing, a diff that actually locks is the ONLY diff you'll want to use. The performance is astonishingly better.
As last season wound down, it was probably our single biggest development goal, to work with a company to produce a true LSD that would lock-up hard, and further reduce or even completely eliminate wheelspin.
We selected OS Giken because of their reputation, especially in Japan. Road race cars in pro Japanese racing series have won championship with that type of differential. They also don't believe in 1.5-way units for FWD applications, as that will cause the car to push on turn-in. This is the last thing you want in a FWD car.
The units are 1.1-way, meaning they are open on turn-in, and only go to lock once power is applied. OS also uses more clutch plates than just about anyone in the world. Unlike other clutch-type diffs, they very infrequently need to be rebuilt.
This is all to say, we worked with Japan and the US arm to develop this differential. We tested more than one setup at the track in the off-season. The units are completely rock-solid. The fitment is near perfect, and it's somewhat imperceptible during normal driving.
Under spirited driving, this diff is second to none. It's virtually eliminated wheelspin, something that was still a problem with the helical unit. Throttle can be applied earlier and to a greater degree, which resulted in very real laptime reductions. The car is a rocket out of the corners now, and the power just gets down to the ground once locked up. Hills, rises, tight hairpins, nothing seems to affect the diff. It just works!
Unlike a helical, when one tire loses contact with the track surface, it still remains locked, sending power to the outside tire. This isn't the case with a helical. In the aforementioned scenario, the diff will act like an open differential and copious wheelspin will result.
OS is a great engineering company. Hardcore racers know their name, but they don't have a lot of marketing muscle here in the US. This really is a "best-kept secret" kind of thing. We're happy to bring the unit to market, and can't wait to hear what you guys and gals all think. This is a huge performance upgrade over the stock diff, and a big improvement over what was previously available.
The forced induction crowd really shouldn't be without it, and even NA cars can benefit significantly.
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