I'm sure you have all seen the the links below but I haven't heard anyone mention them so hear you go. Some interesting facts. I can't make heads or tails of any of this stuff but it seems the h190 is the same as a datsun roadster, 200sx, and a 510 wagon which is not the same as a 1200 but i know you can swap the rearends fairly easly. My friends 1200 has a wagon rear end. I also know that LSD is possible in these cars depending on the type of h190 you have. Now feel free to bash me if you guys knew all of this. It is my first post after all

www.gordon-glasgow.org/lsdtech.html

zhome.com/ZCMnL/tech/GearRatios.html

Greetings all,I still have no results to post and wish to appologise to anyone who is waiting anxiously for them.I have recently had to move house which is quite a large job for me.....and now I have to move again as the new house has just been condemned (that will teach me for looking mainly at the garage).
FYI here's a breif summary, - I have fitted into a H165 centre a bearing that will apply force onto one of the existing side gears of the spider.It is adjustable which allows me to increase the force or 'preload' which will then limit the ability of the spider gear to spin.It is quite fiddly to set up and I believe that although it will work it may be fragile,which can be overcome by using higher tensile materials.
Testing will begin soon and will involve a limited number of bitumen kms followed by removal and inspection(possible photo),then re-install for testing on the Autocross track and/or a quick fang out in the forest,again removal for inspection .........any further is pure imagination
I will be off line again for about 2 weeks but I will post again when I can.
Al.

Hmmm, I would like to test this thingy first to see if my dodgey engineering skills are a total failure again (I have little faith),updates and pics will be posted when available.
Al.

Im at swinburne uni, last year they just used the viscous unit from the subaru diff and made there own housing, this year we are not using subaru, we are doing it diffrenetly with a combination of viscous and clutch to give adjustability, im not working directly on the diff but the torsen was considered too heavy i believe, even though this new design isntgoing to save us much weight

we had our "driver training" day last week, i was happy to have achieved fastest time by .5sec over 16secs, but the motec data revealed i was in oversteer probably 90% of the lap, so my chances of driving in the "endurance" event are slim , i have my excuses though, the gear change had died and i could only use second gear, it was great fun,

it was like driving the suzuki escudo in gran turismo, it absolutel launched and stopped well, but you didnt have time to think about your approach on the next corner, you had to have a good sub-consious idea of what you wanted to do, we only got 8 laps each so it was hard to get used to the car, i think our last years car had some big handeling issues, its handeling sure didnt match the acceeration and a lack of brake fell meant lots of lock ups

asunny,
I would be very interested to see a photo of what you have done - please

1200rallycar,
The subaru lsd you speak of in your SAE car is a pretty big centre to be using in formula SAE. The engineering department at ANU uses a tiny 100mm Torsen centre. Maybe you should consider something similar because the subi centre will take more power to drive when compared to the little Torsen. Only problem is they payed nearly $1800 Oz dollars for the Torsen. Other choice is an Aluminuim solid spool type unit.

Now onto the LSD's - I have the subaru centre on my desk, its out of a 2000 group N subaru WRX. It's the front LSD out of the gearbox and there is no way this baby is going to fit the H165 housing without lots of redesigning and machining. The outside Dia can be easily modified but it's the length between the bearings thats the problem. I imagine that it is possible to use the same principles and parts to reproduce something that suits H165 but the subaru centre has 12 clutch plates so once you make a new outer housing (keep in mind that the H165 housing is shorter between bearings) then you can probably only use 6 of the subi plates. Comparisons between subi centre and H165 can be seen in the photo section because I dont know how to create a direct link here

I have actually modified a h165 diff centre to include adjustable preload using bearings instead of springs...it shouldn't wear out like the spring locker. I am a little worried about tearing the guts out of it though so much testing is required.....stay tuned
Al.

pm sent

Can you get me a "student copy" of solid works?? you lucky sod! I want it!
I want it now!!!!!!

hmm we have a couple of subaru lsd diffs at uni, for use on our Formula SAE car if we wish (we are actually not using it), should be able to get some solidworks drawrings and stuff if it would help, personally i wanna nick one and fit it to the datto some how also, but thats probably not gonna happen

Good luck