New LSD for the tC
04-17-2009, 02:20 PM
#42
Re: THE Diff to Have
Originally Posted by adg016
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.
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.
05-07-2009, 07:05 AM
#45
I had an OS Giken unit on my 240sx and all I have to say is wow. In comparing the two available units tho...the OS feels somewhat like a welded diff (in a 240sx of course) and the TRD one, well it's a good over all unit. Especially for DD and some track days.
05-07-2009, 01:22 PM
#46
Originally Posted by adg016
Originally Posted by paul_dezod
These are now in stock!!!!!!!!!!!!!!!!!
05-07-2009, 02:19 PM
#47
Senior Member
SL Member
Join Date: Jul 2007
Location: West Palm Beach, FL
Posts: 3,773
Originally Posted by paul_dezod
Originally Posted by adg016
Originally Posted by paul_dezod
These are now in stock!!!!!!!!!!!!!!!!!
i would love to see a car fully built by you paul, using only the products you offer. no custom this or one off that. just to showcase the true potential of the tc for the average guy out there who can only afford bolt on's.
05-07-2009, 03:00 PM
#50
Originally Posted by brett561tc
Originally Posted by paul_dezod
Originally Posted by adg016
Originally Posted by paul_dezod
These are now in stock!!!!!!!!!!!!!!!!!
i would love to see a car fully built by you paul, using only the products you offer. no custom this or one off that. just to showcase the true potential of the tc for the average guy out there who can only afford bolt on's.The car will roughly consist of our Alpha Series Kit, AEM EMS and a few other goodies that will be coming to the market soon
05-07-2009, 03:42 PM
#51
Originally Posted by Ace83
x3! like a dezod time attack car something!
05-07-2009, 04:26 PM
#52
Senior Member
Music City Scions
Scikotics
SL Member
Join Date: Jun 2005
Location: TN
Posts: 16,747
Originally Posted by paul_dezod
Originally Posted by Ace83
x3! like a dezod time attack car something!
Do Work!
05-07-2009, 08:02 PM
#56
Originally Posted by Ace83
for sure.. and little play and fun to wont be a bad idea.. i havent seen a dezod tc in action in awhile
