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PostPosted: Tue Oct 15, 2019 3:41 am 
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Joined: Mon Aug 19, 2002 3:40 am
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Location: Mt. Juliet, TN
Are these the only options for a limited slip diff for a 84-87 Civic/CRX? Anybody have any other links or options? I know there's a lot of "if you can find" stuff but what about new?

https://phantomgrip.com/shop/honda-limi ... honda-crx/
https://www.tractionconcepts.com/1983-1 ... ho1433.htm
https://www.tractionconcepts.com/Honda- ... ho1433.htm

2021 is already started
Thanks

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Darryl Saylor
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PostPosted: Tue Oct 15, 2019 6:10 am 
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I tried a Phantom Grip a long time ago in a stock D15 powered Civic Hatch back in the late 90's that I autocrossed. I actually could feel a noticeable difference on corner exit. As soon as I upgraded from the dual-port injection to MPFI, which added about 10hp, the Phantom Grip no longer gripped, and it was just like a stock diff. Plus, the idea of sliding metal to metal contact in my transmission didn't sit well with me. I would never use one on a road-race car.

I'm sure you've heard that Mugen made an LSD for those cars, and they are certainly hen's teeth these days. I would talk to Bob Clark or Jamie Houseman, they may know where to find one.

Are you running limited prep or full prep? Full prep, I would adapt to a later D-series trans. You can also adapt the first-gen Integra CG trans - a B16 LSD will fit in that case with some minor mods.

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PostPosted: Tue Oct 15, 2019 6:19 am 
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I don't know if the later stuff fits, but Quaife does/did offer a diff for the 88+ CRX. I'm not familiar enough with the honda stuff to go farther than suggesting that Quaife makes a bunch of honda applications and you might look there as another option.
???

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PostPosted: Tue Oct 15, 2019 6:34 am 
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Location: Spring Hill, FL.
If OS Gieken made a diff for the VW. I would have one . Jason ran the OS in his Yaris and was very good off the corner.
I use welded now as it has proven faster than the Quiafe . I sold all of my Quaife diffs.

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PostPosted: Tue Oct 15, 2019 6:44 am 
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I guess I could weld them. What's the minuses of welding them on a front wheel drive car? I ran welded diffs on my Spridgets but that's RWD.

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Darryl Saylor
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PostPosted: Tue Oct 15, 2019 6:54 am 
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welded diff= massive understeer when off throttle. they only turn when you're on the gas.
but it's better than an open diff.

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PostPosted: Tue Oct 15, 2019 7:12 am 
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Location: Phila PA
I think I have a welded diff if you want to try that option. I could be wrong, but if the suspension is tuned to reduce front wheel lift, you shouldn't need a great limited slip diff, at the power level of H prod. I think mine is the phantom grip as well, and I don't seem to get the wheel spin that I had with the fiesta, which had a open diff.

If you do find anything useful let us all know. I would really like to find some additional replacement trans parts, or maybe convert to a newer or different trans that I can get more parts for.

I do have several extra gearboxes so maybe not worth converting to something else, but it is nice knowing parts are available.

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PostPosted: Tue Oct 15, 2019 7:24 am 
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Wow, didn't know the Phantom copy of my diff OPM marketed was still being sold. Further surprised that there are more copies.


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PostPosted: Tue Oct 15, 2019 7:27 am 
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Welded requires a lot less rear stiffness to match the increase in front grip . If you just swap in a locker from an open setup, the car will be stupid loose .
You can trail brake with some left foot brake and some power on . Goes fast -not easy- no candyassing.

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PostPosted: Tue Oct 15, 2019 7:34 am 
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Protech Racing wrote:
Welded requires a lot less rear stiffness to match the increase in front grip . If you just swap in a locker from an open setup, the car will be stupid loose .
You can trail brake with some left foot brake and some power on . Goes fast -not easy- no candyassing.

I had an ITB Suzuki Swift with a welded diff. Damn thing would power-on oversteer...I loved it. We ran a spooler in the ITB Mk3 GTI and it worked really well, but made for a real beast to get around in the paddock.


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