it's a good thing fellas

check out this link if still intrested in em

1200coupe, see the extra friction material added, what do you think of this idea?

team swift phantom

As described in prior posts, a clutch pack diff uses the clutch action ( between 23 -115 lb breakaway torque) as a servo mechanism to energise the centre pinion cross assembly that forces the hemisphere's to clamp the clutch pack with increased force to prevent wheel spin.

This PG setup may be good in a car with a combined mass of 100 kg, but above that its is a bit like the ZET turbo and other devices.
[url=http://www.turbonator.com/index.html[/url] that great favourite of performance tuners

bah, wait till my greenie goes again and ill show ya how it works!

i suspect mine is a bit of a universal fit and probably not the best it could be, 1200coupe made his own and by what he told me of how he carefully measured everything, i think it would be a very awesome unit

id buy another any day, the only concern is how much care the installer uses in matching it to the diff you have as this would be crucial, and a good reason to make it yourself

if anyone is intrested read the link, he describes what your getting a lot better than i ever could

I went rallying on the weekend, unfortunately I drove like an old woman, but it did give me the chance to really test out the spring loaded locker I made for my H165.

My unbiased opinion is that the one I made locks and unlocks so it does what it was designed to do.

Some interesting observations to come out of testing are: These things are designed to lock and unlock. Lock both rear axles when you stick your foot onto the throttle and unlock when you lift your foot off the throttle.
Feral, these things are a long way from a real LSD but in my opinion they serve a purpose. The one in my coupe has changed the way it turns into a corner because when the plates are unloaded the rear wheels can turn independently, meaning the car turns much easier once the throttle is lifted. Keep in mind that I am making these coments only in relation to how they perform compared to the poor handling characteristics of a welded centre.
Once you smack your foot back onto the throttle they act the same as a locker because both axles are locked.
Something that caught me by surprise was the way the car became more unstable when you first lift off the throttle, this is because the wheels become unlocked, it felt a bit like I had more rear brake bias and made it easier for me to set the car up when approaching a corner.(this characteristic was something that I liked).

I am not going to get into a big debate about "do these things work or not". All I can tell you is that in my opinion they have made my coupe more fun to drive in the dirt. I have not tested them under race conditions on the tarmac.

I did not think these things would work and I have to admit that I had the same opinion as Feral. After spending some testing time in the car I now believe that my original opinion was wrong.

I cant tell you that they work in huge horsepower or torque applications on the street or how long they last because thats not the application that suits my needs.

1200RC - the extra friction material shown in your link is an absolute waste of time. Surface area is too small for it to make any difference. I believe it would wear out fast then cause more problems than its worth because the PG clearances would change.

Paul.

You know what youve done now Paul, and that is stirred up a can of worms for yourself....in a sense that you will be flooded with people wanting you to make them up for their open dif datsuns.....so the $64 question is how much and how long will it take you to make these thing for us?....Craig

Craig,
You are right, I have been flooded with people wanting to know if and when I can make them one for their cars. Unfortunately my day to day workloads are already very high and after hours I am occupied with Australian rally championship car preperations and of course my own 1200 coupe rally car. I competed on the weekend and broke my option1 straight cut gearset so I am very busy trying to redesign bits and pieces for that.
I am not going to make a heap of these spring loaded lockers because I designed and built mine to suit my H165 centre after it's internals were modified to accept the plates etc. I know from experience the better they are "fitted" to the centre the better and smoother they work. I would need your diff centre as a starting point if I were to make one for a customer because I wont accept manufacturing something if I cant guarantee it's effectivness and the final dimensions will depend on how much work needs to be done to your standard open centre before it is measured for the new plates.
I have given A14force (1200 member) a lot of info re how to manufacture the spring loaded locker and he said he's going to have one made up. Should be interesting to hear any feedback from him because his application will not be rally but drag.

Paul.

As mentioned above, Paul has given me the good oil on how to build one. As soon as I can get my hands on a 3.9:1 H165 diff head I will have one made. Due to the smallness of these diffs and other variables, it is debatable how long one will last under extreeme abuse. However, now that I have a firm grasp of how these centres lock and unlock, I strongly belive that building one will be a worthwhile exersize. Also I don't blame paul for not wanting to make them for anybody else, Each one must be taylored to it's individual carrier.

OK next question is can we have the method as to how to build one posted on the site in the tech section? As most of us use a H165 with varying ratios anyway....my application will be circuit racing.

OK converted.
When I have the time I will post the "how to do" in the tech section. I am flat out at present and expect that I will be that way for a while, so just be patient and I'll get around to it.
It will be a bit hard to explain the machining processes over the web, and only those fimiliar with machining techniques will understand. I will try and keep my explanations simple for all to see.
There is always the option of going to "my photo's" and studying the photo's of the spring loaded locker plates that I have already posted.

Paul.

Quote:

How did you determine this was happening?

Call me dumb but i cant see what makes the spring loaded plate lock and unlock?

How does it lock the axle?
More importantly, if it locks under load in one drive direction, how does it unlock in the opposite drive direction.