the standard diff on my FC is weak...

dthebuk · October 29, 2010, 12:00:18 AM

I don\'t understand what you mean. The half shafts are directly geared to the the wheel and the diff.

Its simple. They don\'t lock up 100%. Diffs for road going cars such as kazz etc will be running around 80% max. You could lock the diff like they do in big trucks etc but for a road/race/drift car, this is not best in terms of performance so 80% is considered an aggressive diff.

dthebuk · October 29, 2010, 12:05:30 AM

neil your diff is most likely open. There\'s a chance it could be a fairly weak LSD such as the FD diff or a VSLD. If you\'ve got an FD diff, the car will be okish for drifting. But the VSLD will get warm and begin to slip more and more.

TBH i\'d have a look at it. Then weld it unless its the fd diff

infernal · October 29, 2010, 12:07:18 AM

I just mean relative motion of one half-shaft as compared to the other\'s.
Wheels velocity = it\'s half shaft\'s velocity.

Anyways thanks for the info, I\'ll keep that in mind concerning clutch diffs.

The FD diff isn\'t that weak. I\'ve seen it live in drifting action and it\'s more than OK!

It\'s also a cheap bolt-on option that is streetable and track able and also maintenance-free!

festa · October 29, 2010, 12:10:54 AM

whent for a spin today and it went very sideways, from stand still and going around corners it steped out niceley so it should have a lsd also its a 1991 jdm and Ive read some ware they have the early fd torrson diff in them?

infernal · October 29, 2010, 12:18:52 AM

AFAIK factory never fitted a torsen in FCs... Maybe the previous owner did! :Giggle

festa · October 29, 2010, 12:33:00 AM

think you may be right found this on fc3 pro
http://fc3spro.com/TECH/MODS/DT/lsd.htm

NeilSR · October 29, 2010, 10:14:13 AM

QuoteTBH this is what scares me most about using 2way\'s on the road instead of welders. They could lock up mid turn and catch you offguard. Where as a welder is always locked!

Lol, I had an r33 skyline with a 2 way which locked up on me doing 55mph when changing gear and lanes on a dual carriageway, missed the car next to me by 6" so it caught me very off guard! lol

Quoteneil your diff is most likely open. There\'s a chance it could be a fairly weak LSD such as the FD diff or a VSLD. If you\'ve got an FD diff, the car will be okish for drifting. But the VSLD will get warm and begin to slip more and more.

TBH i\'d have a look at it. Then weld it unless its the fd diff

Ok cheers mate, thats the way I was thinking of going

Furb · October 29, 2010, 07:40:19 PM

i fitted a FD Torsen diff in my S5 TII after destroying the stock open diff..

fits right in, no modification needed

jono395 · November 01, 2010, 01:15:53 PM

im currently welding mine... only downside i see to this debate, is that... A Lush RX7 ... is Exactly that, untill they hear your tyres scrubbing, thinking its broke... or people generally thinking, "what Dicck welded the diff on a nice car like that" .. Lol ..

other than that, Welder FTW!!

dthebuk · November 01, 2010, 01:59:04 PM

People like that are just wrong

FC\'s are made to be driven hard. Why waste a perfectly good chasis, engine and a shed loads of fuel to get from A to B when it could be being thrashed round a track!

infernal · November 01, 2010, 07:57:27 PM

+100000

The FC has the shape of the perfect car. And guess what... It\'s also fitted with the perfect motor.

XD