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#1
11-04-2007, 10:29
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What tyre pressure were you running in the rear? Might be worth trying to drop a few pounds if you're really suffering from inlift. Bear in mind that if you use normal compressed air your pressure will increase by a few pound (depending on the weather). The harder the tyre the less it'll grip for you. I'm not saying it'll cure inlift totally because it won't but it might help to return drive sooner.
The other option is an obvious one but not a much fun, just don't get back on the throttle as quick, wait a fraction of a second later to go wide open and you might carry more speed from apex to exit back by not wasting time waving an inside wheel around If all that fails then just weld the bastard! At the end of the day it'll be 10 times better than an open jobby and trackday cars should always be setup for a little understeer anyway  Have you got another day booked?
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#2
11-04-2007, 13:31
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I am running a welded diff in my S12, but I also have decent suspension and road legal slicks for track days. I haven't been out on a track with it yet though, so can't comment on just how understeery it will be, but so far the messing around I have done is a good indication that it turns in a treat, and has a lot of grip... in slow corners, roundabouts and junctions it's almost like someone pulled the handbrake on as soon as you turn the steering, this is due to the welded diff... swings and roundabouts really (excuse the pun). a LSD would be a better option for performance road use and occasional track days, but if you want to keep it within a reasonable budget, I would certainly reccomend welding the diff.
The negatives are the scrubbing tyres, and the punishment the driveshafts get whilst turning slowly.... it almost feels more humane to dump the clutch and spin the rear of the car around, rather than letting the inside wheel hop skip and jump around.... I did see a "how to" somewhere on here... and it wasn't difficult, but I would reccomend you to remove the diff, (remove rear axle from the car and the diff cage from the axle housing) clean out the oil, cover the bearings up and then spend a while getting weld spatter off the surrounding area afterwards. I used a mig welder and welded the planet gears to the sun gears, just put the welder on max and blasted the bejeesus out of it...... carefully.... side for side and letting it cool before doing the next bit... LSD is better for road use, more expensive than welding, but probably not that much more work to fit it. Welded diff is better for drifting.... and cheaper... pays yer money and makes yer choice.... Mike.
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Website: http://www.racing-green.com Blog (with 180zx build pictures) http://racing-green.blogspot.com/
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