which is the better LSD?
07-29-06, 10:52 PM
#26
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Originally Posted by NZConvertible
I think you need to admit this is a silly idea and more on. Not only is an Infini diff extremely rare, it'd take a lot more money and effort to fit than simply swapping in a Miata centre.
07-29-06, 10:54 PM
#28
Banned. I got OWNED!!!
Originally Posted by Omixeo
Well im thinking about finding a torsen from a miata like the write-up in the archives, that way I can keep the 4.3 ratio and have a torsen.
If I get the infini IV diff then ill need to get a TII driveshaft as well, not sure about the TII tranny.
Are you sure its 4.33? I always thought it was, but the specs in the FAQ say 4.300, so I just assumed that was correct.
If I get the infini IV diff then ill need to get a TII driveshaft as well, not sure about the TII tranny.
Are you sure its 4.33? I always thought it was, but the specs in the FAQ say 4.300, so I just assumed that was correct.
07-30-06, 01:47 AM
#30
Lives on the Forum
Sure the viscous diffs don't wear like a clutch type diff, but to assume that a viscous diff doesn't get worse with age is wrong. The fluid inside the diff that's responsable for the locking effect will degrade over time, especially if it's being used with sticky tires, lots of power, or aggressive driving.
http://www.sportcompactcarweb.com/pr...t_nissan_350z/ (start on the 4th paragraph to see why viscous diffs aren't that good).
In the Miata world where many of the newer cars had viscous diff's it's said that if it is more than a few years old or has more than say 30K on it then it's effectively an open diff.
Actually for drifting, most would use a clutch diff with a very aggressive lockup, to keep those rear tires loose and spinning together.
As a generalization (from what I've read/my oppinion): Torsens are better for autocross, road racing and street driving as it's more predictable and linear. Clutch types are better for drag racing and drifting because they lock very well. Viscous are a distant second to either of the Torsen or Clutch types, but are a little better than an open diff because they wear out quickly.
Torsens can't handle big power (at least in the stock size), they'll brake if they're asked to transmit too much power, so for that a clutch type will be better.
http://www.sportcompactcarweb.com/pr...t_nissan_350z/ (start on the 4th paragraph to see why viscous diffs aren't that good).
In the Miata world where many of the newer cars had viscous diff's it's said that if it is more than a few years old or has more than say 30K on it then it's effectively an open diff.
Actually for drifting, most would use a clutch diff with a very aggressive lockup, to keep those rear tires loose and spinning together.
As a generalization (from what I've read/my oppinion): Torsens are better for autocross, road racing and street driving as it's more predictable and linear. Clutch types are better for drag racing and drifting because they lock very well. Viscous are a distant second to either of the Torsen or Clutch types, but are a little better than an open diff because they wear out quickly.
Torsens can't handle big power (at least in the stock size), they'll brake if they're asked to transmit too much power, so for that a clutch type will be better.
07-30-06, 11:00 AM
#32
Banned. I got OWNED!!!
Originally Posted by NZConvertible
As per the FSM, the actual ratio is 43:10 (43 teeth on the ring gear, 10 on the pinion), so it is 4.30:1 as the FAQ says, not 4.33:1.
07-30-06, 01:24 PM
#33
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Some of the turbo Miata guys swap to the S4 NA clutch type diff because it is stronger than the Torsen in high HP applications, but they're a minority. The Miata Torsen is good to 250+whp. For an NA FC the Torsen will be more than strong enough.
08-01-06, 05:43 PM
#36
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For a 350 rwhp, maybe 450 in the next couple of years, I should just stick with the S4 Clutch type? This is for a car that gets drag raced, auto crossed, and occasionally curcuit raced.
08-01-06, 07:33 PM
#40
Banned. I got OWNED!!!
Originally Posted by StarScreaM2k1
i wonder how much HP the FD Torsen Diffs can take before they go to the crapper, anyone know or have any ideas? I would think 400HPish would be the limit.
08-01-06, 10:33 PM
#41
they can handle 400HP til you drop the clutch with drag radials on and 6k RPM launch speed, case frags but the torsen still managed to hold together.
far as yours nick, well, i would say if you can find a good price on a torsen then go for that otherwise rebuilding your clutch LSD will give you years of life back to your diff and isn't as pricey as most people make it out to be.
far as yours nick, well, i would say if you can find a good price on a torsen then go for that otherwise rebuilding your clutch LSD will give you years of life back to your diff and isn't as pricey as most people make it out to be.
08-02-06, 12:13 AM
#42
4.30 and 4.33 make a big difference, when regearing your transmission. More specifically, when regearing 5th gear to a different ratio, that .03 difference could be 5-10 mph in gear-limited top speed. But really, who regears their transmission anyway? and where would you be able to do such a thing?
Back to the LSD discussion at hand, Torsen is the way to go if your car doesn't make that much power or torque, or if you don't launch your car at all. Clutch-type is better for high-hp and tq cars, just because it won't break as fast. You could always just weld the axles together for extreme lockup, but enjoy the click-click-click sounds as you try to turn your car in the parking lot.
Back to the LSD discussion at hand, Torsen is the way to go if your car doesn't make that much power or torque, or if you don't launch your car at all. Clutch-type is better for high-hp and tq cars, just because it won't break as fast. You could always just weld the axles together for extreme lockup, but enjoy the click-click-click sounds as you try to turn your car in the parking lot.
08-02-06, 03:56 AM
#43
drifting is an artform
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Not to jack the thread or anything, but how would i know if my 89 gtu (s5) has open diff. or limited slip diff.(LSD). would it be easy to know even though i havent driven a car with an LSD? or can i just look under the car for a way to spot if its open diff.
Thanks.
~ Mike.
Thanks.
~ Mike.
08-02-06, 04:03 AM
#44
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You can check the FAQ thread, it shows all the options the car came with. Or you can check the diff itself, there should be a tag or something that says if its an LSD or not.
08-02-06, 08:06 AM
#45
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Originally Posted by Karack
now that is what i call nitpicking...
Originally Posted by Roen
4.30 and 4.33 make a big difference, when regearing your transmission. More specifically, when regearing 5th gear to a different ratio, that .03 difference could be 5-10 mph in gear-limited top speed.
08-02-06, 11:21 AM
#46
Originally Posted by NZConvertible
I don't really care what the exact ratio is. What I do care about is when people post incorrect info, refuse to believe it when they're corrected and claim the info in the FAQ is wrong. It's not like the correct info was hard to find.
I see you just took at wild guess at that. The difference is a whopping 0.7%, or ~1mph if your theoretical top speed is 150mph. Totally insignificant.
I see you just took at wild guess at that. The difference is a whopping 0.7%, or ~1mph if your theoretical top speed is 150mph. Totally insignificant.
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