I have a 1992 (S13) 240SX hatchback with HKS coil-overs, DC Sports header, and other minor bolt-ons.
I’m here to ask for info on different limited-slip units, because it needs one.
Yes, I did a search, and noticed most of the discussions are old:
search.php?keywords=%2Bdifferential+%2B ... mit=Search
http://nissanroadracing.com/archive/ind ... -2845.html
Yeah, I know what autocross is.
(somewhat) brief history:
I’ve been autocrossing on and off since 1997.
From 2001 to 2007 I autocrossed a 1996 (S14) 240SX SE with ABS and VLSD.
I actually ran it in the STS class (back when that stood for “Street Touring, Street tire”) for a few years, with no mods but a custom cat-back and front camber bolts. It looked competitive until someone showed up in a Saturn with coil-overs and every other allowable modification for the class.
I got the 1992 hatchback in 2006, and it was barely in good enough condition to drive it, much less autocross.
In 2008 my wife was driving the S14 and it got rear-ended, totaled, and sold.
I started autocross again, and have put a lot of money and effort into trying to make the 1992 car as good as the 1996 car my wife rekt. It still has an open diff, so on a lot of courses it’s still a wheel-spinning mess.
I took a break from autocross, and now that I’m getting back into it I find the STC class doesn’t exist any more. A Street Touring 240SX has to run in STX, the domain of the ITR, WRX, and (what is faster locally) BMW 328i and 330i.
I’ve looked at results from my 3 events this year, and I have to be 7% faster to beat the next slowest guy in STX. I have to be 12% faster to challenge the leading BMWs.
The last 2 events I’ve had instructors ride with me and tell me I have a good line, and I’m good at keeping the car under control. (They tell me this as my open differential spins one wheel and causes the car to swing off of my intended line.)
STX rules allow 2WD competitors to use whatever limited-slip they want,
and I’m getting the idea that no one is impressed with the viscous LSD.
My 240SX is a street car
that goes racing sometimes, so I need an LSD that’s quiet, and engages smoothly.
I think I want a pre-loaded helical gear differential.
That’s not a Quaife, is it? I was considering Quaife, but…
I also read one guy’s description saying he has a Quaife in his car, and if one tire has no traction (such as on snow or ice) that tire spins and the car doesn’t go anywhere.
SO, who’s selling a pre-loaded helical diff for a 240SX these days?
My google search turned up OBX and Quaife, which I’m pretty sure aren’t pre-loaded types.
My next choice would be a clutch-type 1.5-way differential.
I’d like it to have 30% to 40% lock, or if it’s going to lock more than that I need it to engage really smoothly.
Would the OS Giken fit that description?
I can still find the OS Giken Super-Lock and the Nismo LSD for sale, and the prices don’t seem to have changed.
http://www.240sxmotoring.com/os-giken-s ... 0sx-89-98/
http://www.courtesyparts.com/nismo/nism ... 8420-rs661
My searches on this forum have turned up some talk about aftermarket LSDs making clicking or popping noises.
For the price, the OS Giken better not do that.
Does the Nismo LSD do that?
The description doesn’t tell me the percent lock. I would guess that it’s a 2-way. Can anyone here tell me for sure?
Also, does anyone know a shop in the Chesapeake, VA area that does good work on Nissan diffs?