LSD Transmissions vs Hydro Transmissions
#2
hydro trannies can also be LSD.
your question is unclear.... do you want to know what an LSD tranny does?
basically the two front wheels on most cars turn separately because the left and right wheels travel a diff't distance during a turn (the outside wheel has a longer distance to travel)
with on open diff, the two wheels always travel independently, so if one wheel begins to spin (like in a hard acceleration situation) all available power goes to that wheel.... and since the wheel is spinning, all that power is wasted and the car goes nowhere. (power takes the path of least resistance, which in this case is the spinning wheel).
in a LSD (limited slip differential) the two wheels can travel independently in most circumstances. once a certian threshold is broken there is a mechanism that engages so that the two wheels in essence share a common shaft almost, so that BOTH wheels start turning (so now instead of the power going to the one spinning wheel, BOTH wheels get power)
there are diff't types of LSDs. clutch, planetary gears, and there is that phantom grip type which I dunno what it's called. phantom grip is the crappiest. the other two each have their adv and disadv. honda has used both of the good types in diff't cars.
Quaife is a planetary gear set, while Kaaz and Cusco are both clutch types I believe.
If anyone sees any mistakes or omissions please feel free to correct me.... I'm not exactly an authority on LSDs.
Oh yeah, and if the upgrade is worth the money, that depends on what kinda driving you do. If you accelerate hard out of many corners, then hell yeah, the upgrade is well worth the money.
your question is unclear.... do you want to know what an LSD tranny does?
basically the two front wheels on most cars turn separately because the left and right wheels travel a diff't distance during a turn (the outside wheel has a longer distance to travel)
with on open diff, the two wheels always travel independently, so if one wheel begins to spin (like in a hard acceleration situation) all available power goes to that wheel.... and since the wheel is spinning, all that power is wasted and the car goes nowhere. (power takes the path of least resistance, which in this case is the spinning wheel).
in a LSD (limited slip differential) the two wheels can travel independently in most circumstances. once a certian threshold is broken there is a mechanism that engages so that the two wheels in essence share a common shaft almost, so that BOTH wheels start turning (so now instead of the power going to the one spinning wheel, BOTH wheels get power)
there are diff't types of LSDs. clutch, planetary gears, and there is that phantom grip type which I dunno what it's called. phantom grip is the crappiest. the other two each have their adv and disadv. honda has used both of the good types in diff't cars.
Quaife is a planetary gear set, while Kaaz and Cusco are both clutch types I believe.
If anyone sees any mistakes or omissions please feel free to correct me.... I'm not exactly an authority on LSDs.
Oh yeah, and if the upgrade is worth the money, that depends on what kinda driving you do. If you accelerate hard out of many corners, then hell yeah, the upgrade is well worth the money.
#3
THe Phatom grip one is only a partial copy of an OPM LSD... and it doesn't work and will distroy the spider gears in the diff.
Personally for me I'm getting a OPM LSD next year.
why not a Quaife? simple they don't make a LSD with a correct Bearing size for my transmission. for the CX and DX transmission you need a 35 mm bearing. For a Si transmission you need a 40 mm bearing. Quaife makes the 40 mm bearing version of the diff. they say you could get it machined down to 35 mm however it would be extremely difficult since it's a hardened steel unit.
also Hydro and Cable transmissions refer to the way the clutch is disengaged. a Hydro transmission uses a hydrolic system to push a piston that moves the lever to disengage the clutch... where as a cable transmission uses a cable connected to the clutch pedal...
personally I perfer a cable to hydrolics
Personally for me I'm getting a OPM LSD next year.
why not a Quaife? simple they don't make a LSD with a correct Bearing size for my transmission. for the CX and DX transmission you need a 35 mm bearing. For a Si transmission you need a 40 mm bearing. Quaife makes the 40 mm bearing version of the diff. they say you could get it machined down to 35 mm however it would be extremely difficult since it's a hardened steel unit.
also Hydro and Cable transmissions refer to the way the clutch is disengaged. a Hydro transmission uses a hydrolic system to push a piston that moves the lever to disengage the clutch... where as a cable transmission uses a cable connected to the clutch pedal...
personally I perfer a cable to hydrolics
#6
Originally posted by g2speed
correct me if i'm wrong but don't cable tranny's grind less then hyrdo.. or is't vice versa or am i completely off?
correct me if i'm wrong but don't cable tranny's grind less then hyrdo.. or is't vice versa or am i completely off?
but no transmission should grind.
#9
Well Charles they have it listed still but ask them for one for a civic CX and they will tell you the part number and state it's no longer in production and that they no longer have any stock... I forget if it's the 40 or 35 mm bearings that are needed for the CX and DX but tehy don't have that one
#10
Originally posted by gatherer
thats a myth.. came about because it's easier on a cable transmission to know when the clutch is disengaged so that you can switch gears... the hydro clutches are harder to feel the disengagement point so some times you'll switch gears without properly disengaging the clutch and get a grind...
but no transmission should grind.
thats a myth.. came about because it's easier on a cable transmission to know when the clutch is disengaged so that you can switch gears... the hydro clutches are harder to feel the disengagement point so some times you'll switch gears without properly disengaging the clutch and get a grind...
but no transmission should grind.
#11
Originally posted by Christof
Thanks alot guys, makes sense, but just a though....if your poping the clutch...aren't you giving it a close to short shifter effect too?
Thanks alot guys, makes sense, but just a though....if your poping the clutch...aren't you giving it a close to short shifter effect too?
#14
a short shiffer... just shortens the length you have to move the shifter.... ya know the stick.....
‘Shift throw’ refers directly to actual physical travel of the shifter stick - thus affecting the time it takes to shift from one gear to another . In a performance situation, the additional seconds (or fractions of a second) a factory stock shifter takes to go from one gear to another can result in slower elapsed times - or just a sluggish feeling when driving around town.
^^ Got that from some site but lost URL??
and i don't think he has driven stick before lol
‘Shift throw’ refers directly to actual physical travel of the shifter stick - thus affecting the time it takes to shift from one gear to another . In a performance situation, the additional seconds (or fractions of a second) a factory stock shifter takes to go from one gear to another can result in slower elapsed times - or just a sluggish feeling when driving around town.
^^ Got that from some site but lost URL??
and i don't think he has driven stick before lol
#16
Honda likes to use the planetary gear setup a lot, so I assume it's gonna be that one. only one car uses the clutch type in the honda lineup and it's the EK9 (Civic Type R of the 96-00 vintage). The ITR of the same year I think uses the planetary gears too.
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