Wow Look what i found. HKS LA CLUTCH (single plate)
Jan 16, 2008, 08:31 PM
#19
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IIRC, even in the scenario of a single and twin which are of the same total weight, if the the twin is of smaller diameter, the moment of inertia of the twin would be lower. The only thing I'm uncertain on is if the distribution of the mass across two discs would create a variance great enough to offset the distribution of mass caveat.
In general, though, I would say that Steve is write on this part. Multi-plate clutches aren't just because you can handle a higher maximum power, they also locate the mass needed, for that holding ability, closer to the axis of rotation.
In general, though, I would say that Steve is write on this part. Multi-plate clutches aren't just because you can handle a higher maximum power, they also locate the mass needed, for that holding ability, closer to the axis of rotation.
Last edited by articfury; Jan 16, 2008 at 08:32 PM. Reason: grammar
Jan 17, 2008, 10:17 AM
#22
IIRC, even in the scenario of a single and twin which are of the same total weight, if the the twin is of smaller diameter, the moment of inertia of the twin would be lower. The only thing I'm uncertain on is if the distribution of the mass across two discs would create a variance great enough to offset the distribution of mass caveat.
In general, though, I would say that Steve is write on this part. Multi-plate clutches aren't just because you can handle a higher maximum power, they also locate the mass needed, for that holding ability, closer to the axis of rotation.
In general, though, I would say that Steve is write on this part. Multi-plate clutches aren't just because you can handle a higher maximum power, they also locate the mass needed, for that holding ability, closer to the axis of rotation.
This isn't a 100mm carbon twin vs a 240mm organic single. one ~240mm disc will have less inertia then 2 ~220mm discs. I couldn't find it on the website but i'd venture a guess that the HKS LA disc is also around 220mm like the exedy hyper single is.
Jan 17, 2008, 10:33 AM
#23
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Before the Indy and F1 cars had DSG stlye transmissions, you ever see their clutches? I think I even saw a 5 or 6 disc clutch setup and they were the diamerter of cd's. So that has no less inertia on the input shaft then one single disc the size of a 45 record?
-Steve
after you have presented so much fact in your argument it is hard to disagree
Jan 17, 2008, 12:10 PM
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The Light Action clutch kits from HKS are actually meant for street cars. The light action is referring to the actual pedal feel, not the way it grabs. They are a single disc set up, similar in design to the Exedy Hyper Single, but not as high of performance. We've sold and installed a few of these so far, and they have worked out great. The cars we've installed them on have been cars with fairly light modifications like a FPGreen or GT3071 with only pump gas maps (CA pump, the toilet water). They feel basically like a stock car with SLIGHTLY stiffer pedal pressure, marginal changes from stock. The clutch tends to grab harder then stock, but lighter then an ACT 2900 or Exedy twin plate. The engagement is not like a on/off switch, but more smooth and allows more slipping when needed.
I'll see if I can get some measurements of the clutch disc next time one comes through, we have two more on order right now. I hope this helps...
Jerry
I'll see if I can get some measurements of the clutch disc next time one comes through, we have two more on order right now. I hope this helps...
Jerry
Jan 17, 2008, 12:55 PM
#26
Before the Indy and F1 cars had DSG stlye transmissions, you ever see their clutches? I think I even saw a 5 or 6 disc clutch setup and they were the diamerter of cd's. So that has no less inertia on the input shaft then one single disc the size of a 45 record?
-Steve
-Steve
according to cosworth the reason they ran the small dia clutches in the DFV engine was to lower the crank centerline and thus lower the cg of the engine.
Jan 17, 2008, 01:13 PM
#28
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The Light Action clutch kits from HKS are actually meant for street cars. The light action is referring to the actual pedal feel, not the way it grabs. They are a single disc set up, similar in design to the Exedy Hyper Single, but not as high of performance. We've sold and installed a few of these so far, and they have worked out great. The cars we've installed them on have been cars with fairly light modifications like a FPGreen or GT3071 with only pump gas maps (CA pump, the toilet water). They feel basically like a stock car with SLIGHTLY stiffer pedal pressure, marginal changes from stock. The clutch tends to grab harder then stock, but lighter then an ACT 2900 or Exedy twin plate. The engagement is not like a on/off switch, but more smooth and allows more slipping when needed.
I'll see if I can get some measurements of the clutch disc next time one comes through, we have two more on order right now. I hope this helps...
Jerry
I'll see if I can get some measurements of the clutch disc next time one comes through, we have two more on order right now. I hope this helps...
Jerry
And there is your review. And quote ( "We've sold and installed a few of these so far, and they have worked out great.")
Jan 17, 2008, 09:15 PM
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Before the Indy and F1 cars had DSG stlye transmissions, you ever see their clutches? I think I even saw a 5 or 6 disc clutch setup and they were the diamerter of cd's. So that has no less inertia on the input shaft then one single disc the size of a 45 record?
-Steve
-Steve
this is not so much directed at you as much as this forum as a whole
Can we please stop comparing what full out race cars with race teams and million dollars in factory support do to their cars to the average evo?
It's really annoying to see so many people want to justify what they do to their cars based off of cars that have a team of people working on them race after race