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Tracking / Autocross / HPDE / Drifting What these cars were built for!


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Old 03-29-2020, 07:30 PM   #141
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Originally Posted by tony_r View Post
Torsen allows you to get away with bad driving habits on entry. OSG will punish you for it.

On exit it's the opposite.

Yoks let you get away with everything, blending bad inputs is stupid easy.
Could you please explain the bad habits that the OSG will punish on corner entry? Thanks!
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Old 03-30-2020, 08:28 AM   #142
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Could you please explain the bad habits that the OSG will punish on corner entry? Thanks!
OSG, being a clutch type diff has inherit static lock on decel.

Thus, if you try to come in too hot - OSG can't completely go open like a stock OEM Diff and so the car will want to push a bit more than freely rotate.
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Old 03-30-2020, 10:54 AM   #143
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Mine is set up as a 1 way so no lock on decel.

I have 1.5 way OSG in my s13 and I love it on track (and autocrossed the car for a long time on hoosiers) and yes, a little bit tighter on turn-in though for that car it works perfectly.
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Old 03-30-2020, 03:43 PM   #144
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Originally Posted by e1_griego View Post
Mine is set up as a 1 way so no lock on decel.

I have 1.5 way OSG in my s13 and I love it on track (and autocrossed the car for a long time on hoosiers) and yes, a little bit tighter on turn-in though for that car it works perfectly.


Is your OSG set up like Lugod's STX tune?
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Old 03-30-2020, 04:26 PM   #145
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Yes it is.
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Old 03-31-2020, 02:42 AM   #146
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Even with Lugod's updated unit it's still less "free" on entry vs Torsen.

But I'm not advocating one way or the other.
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Old 03-31-2020, 07:59 AM   #147
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Even with Lugod's updated unit it's still less "free" on entry vs Torsen.

But I'm not advocating one way or the other.
To touch on Tony's point...even if it's classified as a 1 way (90 degree decel ramp angles) - you still have inherit static lock.

Depending on who sets this up, can have something low like 30-40 ft-lbs or something high 80-90 ft-lbs+ on static lock. Even a 1 way can change the behavior of the car on how it's configured.
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Old 03-31-2020, 12:25 PM   #148
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Alright, fair enough.
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Old 03-31-2020, 12:46 PM   #149
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even if it's classified as a 1 way (90 degree decel ramp angles) - you still have inherit static lock.
You're talking pre-load, right?

Anyone know what kind of accel ramp angles various LSDs use?
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Old 04-05-2020, 09:41 PM   #150
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Whiteline seems like a mixed bag on here but I've never had a problem and I just pulled my 3 year old set off and they're still fine.

The KLC180-195 are the version I ran which are shorter than the ones they spec for the 86.

I'm trying to sell the bar + links together or else I'd offer to sell the links separately.
I just put Whitelines on and no issues so far!! Thanks!
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Old 04-06-2020, 08:27 PM   #151
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I just put Whitelines on and no issues so far!! Thanks!

My Whiteline KLC 180-195's seized up after about 3 years. My car is always garaged and I don't deal with road salt either. Just installed some new Racer X endlinks yesterday and hoping they hold up better.
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Old 04-15-2020, 01:02 PM   #152
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3rd gear

How often are you guys shifting into 3rd?

Is the 4.3 final drive on later cars a plus or minus?

2019 nationals videos seem to be all 2nd gear.
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Old 04-15-2020, 02:22 PM   #153
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How often are you guys shifting into 3rd?

Is the 4.3 final drive on later cars a plus or minus?

2019 nationals videos seem to be all 2nd gear.

I drove my 2019 at Dixie in CS. I was on the limiter several times both days. I think the the 4.1 rear would have been an advantage there.
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Old 04-16-2020, 08:49 PM   #154
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Once or twice on a larger course for sure, the shorter FD cars would've been at a disadvantage very much near/on the limiter at 60+mph in a few places iirc. You can mitigate some of that with a higher redline tune as the later engines have a slightly improved valvetrain. If all your local stuff is small then the shorter gearing might benefit you.
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