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 Kinda dumb lsd question but...

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mrsparkle
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PostSubject: Kinda dumb lsd question but...   Sat Feb 23, 2013 10:08 am

You guys think this crazy fucker is using a 1.5 or 2way lsd? I know in the begining it says he's using a "GT LSD" but i couldnt find any solid info about that diff.

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-thanks
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Riggle
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PostSubject: Re: Kinda dumb lsd question but...   Sat Feb 23, 2013 3:15 pm

Prob 2 way because it locks fully on decell, causing instability, thus swank dorifto mode.

Real race cars (read track cars) only run a 1.5 as it only locks up a certain percentage on accell/decell, thus limiting/eliminating instability in the ass under all conditions (read this as less tire spinnage, more control).

Running a 2 way is a bad idea if you are tracking, but a good idea if you are drifting.

Here is wiki of whats actually going on if you care.

Broadly speaking, there are three input torque states: load, no load, and overrun. During load conditions, as previously stated, the coupling is proportional to the input torque. With no load, the coupling is reduced to the static coupling. The behavior on overrun (particularly sudden throttle release) determines whether the LSD is 1 way, 1.5 way, or 2 way.

A 2-way differential will have the same limiting torque Trq d in both the forward and reverse directions. This means the differential will provide some level of limiting under engine braking.

A 1-way differential will provide its limiting action in only one direction. When torque is applied in the opposite direction it behaves like an open differential. In the case of a FWD car it is argued to be safer than a 2-way differential.[6] The argument is if there is no additional coupling on overrun, i.e. a 1-way LSD as soon as the driver lifts the throttle, the LSD unlocks and behaves somewhat like a conventional open differential. This is also the best for FWD cars, as it allows the car to turn in on throttle release, instead of ploughing forward.[6]

A 1.5-way differential refers to one where the forward and reverse limiting torques, Trq d_fwd, d_rev , are different but neither is zero as in the case of the 1-way LSD. This type of differential is common in racing cars where a strong limiting torque can aid stability under engine braking.

To conclude, who knows what "GT LSD" stands for? If its a real diff from a GT300/500 series car, I would assume its a customizable 1.5way.
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s13.240sx
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PostSubject: Re: Kinda dumb lsd question but...   Sun Feb 24, 2013 8:26 am

The GT Pro is a customizable diff it gives you adjustments for 3 intial torque settings. As well as the ability to add/remove clutch plates to change from 1.5 to 2 way diff. It also will run you about $1500 iirc.
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mrsparkle
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PostSubject: Re: Kinda dumb lsd question but...   Sun Feb 24, 2013 11:58 am

I understand what you mean by instability with 2 way on high speed decel, it seems like the 2way even acts like a additional "brake" and could be looked at as pro/con depending if you like it/driving style! Probably could counter act that with some fatter tires!?

Either way the customizable diff would probably be the best way to go, so you dont lie awake at night thiinking if you should get that 1.5 vs 2way Smile


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s13.240sx
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PostSubject: Re: Kinda dumb lsd question but...   Sun Feb 24, 2013 6:07 pm

Unless you seriously track your car. It doesn't seem worth it for the $$$. IMO
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Riggle
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PostSubject: Re: Kinda dumb lsd question but...   Sun Feb 24, 2013 6:14 pm

Ditto, seat time is what makes a great driver, not parts.

Keiichi Tsuchiya dominates, even in stock cars with factory LSD's. Why? Seat time!


National championships

He would continue to take part in the Japanese Formula Three Championship, Japanese Touring Car Championship (JTCC), the latter while driving a Nissan Skyline GT-R (previously in the Cosmo Oil Sierra Cosworth) in the Group A championships and later a Honda Civic in the Supertouring car championships. [1]

Le Mans

He went on to score a class win and an 8th place overall at the 1995 24 Hours of Le Mans in a Honda NSX. In 1999 of the same race, this time in a Toyota GT-One, during the last hour while co-driver Ukyo Katayama was building up pace to the leading BMW V12 LMR he was forced into the grass by a backmarker privateer's BMW LMP, blowing the tire out. They survived the ordeal and went onto score the fastest lap but were forced to settle for second.

NASCAR

He has raced in NASCAR-sanctioned exhibition races at Suzuka Circuit (Suzuka Thunder 100) and at Twin Ring Motegi Superspeedway for the 1998 NASCAR-sanctioned exhibition and 1999 NASCAR Grand National Division, AutoZone West Series races at the circuit, both named the Coca-Cola 500K.


1977 Debut in Fuji Freshman series.
1977-1984 Ran selected entries in All Japan Touring Car championship.
1984 Fuji Freshman series race (Toyota AE86)= 6 wins
1985 All Japan Touring Car championship (Toyota AE86) 1st in Class 3
1986 Corolla Sprinter Cup-2 podium places
1987 All Japan Touring Car championship (Honda Civic) -1 win
1988 Toyota Cup-1st overall
All Japan Touring Car championship (BMW E30) -3rd in Class 2
Macau Guia race (BMW M3) -4th overall
1989 All Japan F3 championship
All Japan Touring Car championship (Ford Sierra Cosworth) -1 win
1990 All Japan Touring Car championship (Ford Sierra Cosworth)
Macau Guia race (Ford Sierra Cosworth)
New Zealand Touring Car series (Toyota)
1991 All Japan F3 championship (Ralt-Mugen)-10th overall
All Japan Touring Car championship (Nissan Skyline GT-R) -5th overall
1992 All Japan Touring Car championship (Nissan Skyline GT-R)
1993 All Japan Touring Car championship (Taisan Nissan Skyline GT-R) -1 win
Japan Endurance series (Honda Prelude) -2nd Tsukuba 12 Hours
1994 All Japan GT championship (Porsche 911T) -1 win
All Japan Touring Car championship (Honda Civic)
Suzuka 1000 km (Porsche 911T) -1st in class, 2nd overall
Le Mans 24 Hours (Honda NSX) -18th overall
1995 All Japan GT championship (Porsche911TRSR)
All Japan Touring Car championship (Honda Civic)
Suzuka 1000 km (Honda NSX) -5th overall
Tokachi 12 Hours (Honda NSX) -1st overall
Le Mans 24 Hours (Honda NSX) -1st in class
1996 All Japan GT championship (Honda NSX) -13th overall
Entered NASCAR Thunder Special race at Suzuka
Le mans 24 Hours (Honda NSX) -3rd in class
1997 All Japan GT championship (Porsche 911/Dodge Viper)
Fuji InterTec race (Toyota Chaser)
Suzuka 1000 km (Lark McLaren F1 GTR) -9th overall
Entered NASCAR Thunder Special race at Suzuka
Le Mans 24 Hours (Lark McLaren F1 GTR) -qualified 10th, retired from race
1998 All Japan Touring Car championship (Toyota Chaser) -7th overall
All Japan GT championship (Toyota Supra) -8th overall
Le Mans 24 Hours (Toyota GT-One) -9th overall
NASCAR at the California Speedway.
1999 Japan Touring Car Championship (Advan Altezza Touring car).
Le Mans 24 Hours (Toyota GT-One) -2nd overall
2000 Le Mans 24 Hours (Panoz LMP-1 Roadster-S) -8th overall
2000-2003 he joined team ARTA racing an NSX once again in the All Japan GT championship.
2004-2005 studied in Australia to complete inter-2 course.


Ha, he even dabbled in roundy round car chassis racing (though did not race on ovals). What a boss.
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