Took me a while to figure that one out haha, actually thought it was centrifugally engaging for a bit, like rev the engine up, and the weights engage it. Then i figured, how do you change gears, thats pretty useless.... but i now that i have worked it out, seems even more useless.

 

Sure 4K isnt just the part number for a 1jz clutch or something more substantial haha??

 

Yeah thats what I was thinking. Someone just buy it to test it out. :y:

 

 

Yeah thats what I was thinking. Someone just buy it to test it out. :y:

 

I'm seriously thinking about it!!

IIRC, HKS stands for Hong Kong Supermarket.

 

some fine shiz they make too. turns out the TE27 has a HKS lumpy inlet cam.

thinking about it, the faster your motor is spinning, the less that things want to move fast ie the petals in the centre of the pressure plate, so with the weights attached, it would actuate the engagement faster at high rpm than without weights.

 

maybe i'm crazy???

Yeah the weights add to clamping load at high rpm as they get thrown outwards in a centrifugal motion.

 

Centreforce bases all of it's clutch line on this theroy but theres been some debates to it's effectiveness and

it adds complications to the clutch mechanism in operation and manufacture so I wasn't sold on it really...

 

http://www.centerforce.com/

 

http://www.centerforce.com/technology/centerforce-weights

Edited April 25, 201214 yr by styler

am i the only person curious why hks (a nissan aftermarket product group) is making clutches for toyota 4ks?

Erm... HKS make parts for everything, haven't been affiliated with Nissan, ever, to the best of my knowledge. In fact the company was started by a dude who worked for Yamaha, so if anything, closer ties with Toyota...

 

Sure you're not thinking of Nismo?

 

Basic research will tell you H = Hasegawa, a former Yamaha engineer, K = Kitagawa, his business partner, and S = Sigma Automotive, aka Sigma Advanced Racing Division, aka SARD - an aftermarket/OEM supplier primarily to Toyota.

 

The amount of HKS stuff out there for Toyotas is proof enough that it isn't a Nissan company.

What a shit idea. A heavier pressure plate spring would be much better and wouldn't cause so many damn balancing issues.

What a shit idea. A heavier pressure plate spring would be much better and wouldn't cause so many damn balancing issues.

 

But centrifugal sounds so ʞ©$ɟing RACE! I've got one on my wipper snipper!

Edited April 25, 201214 yr by GJM85

137E

 

Mmmmm K engine that might use something like this... Centrifugal weights could actually assist with high rpm balancing...

180ps from a K based engine, and 10,000rpm. Makes me happy in the pants.

Edited April 25, 201214 yr by white_sandshoe

10,000rpm + Centrifugal clutch....

 

....Careful that baby don't clamp your friction plate through your flywheel

pretty cool concept, seems like a bit of a gimic though.

 

i guess the selling catch phrase is somethig like "get stronger bite out of your clutch with no extra pedal effort, and some additional rotating inertia"

 

just get a decent pressure plate, and put up with the additional pedal effort.

 

But we are talking about a k motor here, must be a hand grenade motor to require a clutch any bigger than something off the shelf, or a modified pressure plate.

Edited April 25, 201214 yr by ke70dave

My Armstrong Siddeley had a centrifugal clutch, but that used three "L"-shaped arms with weights. You sat at the lights in first gear with your foot off the clutch, and as you accelerated it took up the drive automatically. With its pre-selector gearbox, the "clutch" pedal actually worked the gearbox and the clutch never disengaged when moving. You kept selecting one gear ahead and just pushed the pedal to change.

 

Maybe this would work OK with dog gears like a motorbike box.

What a shit idea. A heavier pressure plate spring would be much better and wouldn't cause so many damn balancing issues.

 

But a heavier spring will make the pedal very heavy when trying to get off the line. With this the clamping pressure increases as its required.

 

I still get a little bit of clutch slip with the Exedy HD button!!! With the old extreme clutch it started slipping @ 10psi, you can actually hear it in my youtube dyno vids and see it on the graph!

 

 

Just buy it stu! :yes:

Just buy it stu! :yes:

 

You know I really really want too. Trying to find specs for it. Wondering if it's going to like anti-lag?Haha. I need to do a pressure plate and friction plate for the new T50 I've managed to find thanks to Jono.C!!!

 

I'll need to check my flywheel tomoz with an old 4k pressure plate, I remember having issues with the pressure plate and it needing some angle grinder love to clear the k50.

Edited April 26, 201214 yr by kickn5k

This idea seems a bit gimmicky to me too. Wouldn't you want most of your clamping force at peak torque, which is generally further down the rev range than peak revs? Then at peak revs when you're most likely to shift wouldn't the weights add to the pedal force required to disengage the clutch?

 

Like philbey said, just get a heavy duty.