Front LSD !!!!!!!!!!!!!!!!!!

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Front LSD !!!!!!!!!!!!!!!!!!

Postby Flying Bajan » Wed Oct 05, 2011 6:00 pm

Ladies and Gents...

Been talking to the folks at M Factory about a front helical LSD for our cars. They seem keen to have a go at it and would require a minimum of 10 units to be ordered.

What they need now is some good, detailed photos of a front diff out of a ST165, 185 or 205 to get an idea of ulitmate feasibility and costings.

Anyone have or can point me in the direction of such photos ?

Also, anyone interested in a helical front LSD, please chime in here so I can determine if we have the numbers interested to make it work.
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Re: Front LSD !!!!!!!!!!!!!!!!!!

Postby CMS-GT4 » Wed Oct 05, 2011 6:56 pm

I am a bit covered up right now, but I am sure Martin (gtfrour77) posted a bit when he was trying to get one made. Like everyone else, it all depends on the price.
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Re: Front LSD !!!!!!!!!!!!!!!!!!

Postby concealer404 » Wed Oct 05, 2011 7:47 pm

The price will be in the $700-$800 range more than likely. Will include new bearings and hardware. Likely will NOT include new ring gear.


(No, i'm not involved in this buy, but just was for another one of my cars.)
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Re: Front LSD !!!!!!!!!!!!!!!!!!

Postby CMS-GT4 » Wed Oct 05, 2011 7:49 pm

That price range would be fair. I need to read up more on the company and see what kind of quality they are known for.
Coldiron
92 st185 (205 swap) | 03 350Z Track (sold) | 13 Pilot | 17 Mazda3
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Re: Front LSD !!!!!!!!!!!!!!!!!!

Postby celicat93 » Wed Oct 05, 2011 8:14 pm

Yeah, it sounds interesting to me, though I don't ever have traction problems except in the winter and I'm going to stop driving my AT in the winter. I guess I'll wait for a price too.
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Re: Front LSD !!!!!!!!!!!!!!!!!!

Postby CMS-GT4 » Wed Oct 05, 2011 8:30 pm

This isn't so much about traction for being stuck, this is for corner exit traction making us faster.
Coldiron
92 st185 (205 swap) | 03 350Z Track (sold) | 13 Pilot | 17 Mazda3
www.noritoy.com | noritoy.deviantart.com | http://www.alltrac.net/phpBB2/viewtopic.php?f=44&t=19891
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Re: Front LSD !!!!!!!!!!!!!!!!!!

Postby concealer404 » Wed Oct 05, 2011 9:09 pm

CMS-GT4 wrote:That price range would be fair. I need to read up more on the company and see what kind of quality they are known for.



It's good stuff. The Honda guys have been using this company for years. I bet they could be persuaded to make custom final drives for you guys as well. (Currently talking with them about a 4.68 F/D for my race car.)

Their customer service is pretty awesome, too.
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Re: Front LSD !!!!!!!!!!!!!!!!!!

Postby CMS-GT4 » Wed Oct 05, 2011 10:13 pm

If they can make a 4.6 FD cheaper than Phoenix in Japan then they might have some interest from the MR2 guys as well.
Coldiron
92 st185 (205 swap) | 03 350Z Track (sold) | 13 Pilot | 17 Mazda3
www.noritoy.com | noritoy.deviantart.com | http://www.alltrac.net/phpBB2/viewtopic.php?f=44&t=19891
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Re: Front LSD !!!!!!!!!!!!!!!!!!

Postby celicat93 » Wed Oct 05, 2011 10:43 pm

CMS-GT4 wrote:This isn't so much about traction for being stuck, this is for corner exit traction making us faster.


Good deal.
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Re: Front LSD !!!!!!!!!!!!!!!!!!

Postby Flying Bajan » Wed Oct 05, 2011 10:51 pm

You have not lived until you have driven a powerful AWD car with proper front and rear LSDs... You can drive them with SOOOOOOOOOOOOO much more commitment it's unreal. It's much easier to bring them back from over the limit with a good front diff.

Anyone with a link or good photos of the front diff area ?
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Re: Front LSD !!!!!!!!!!!!!!!!!!

Postby underscore » Thu Oct 06, 2011 12:22 am

I'm very tempted, I assume it would work with the RC as well? More info on the benefits of the frontal LSD would be nice for us noobs.
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Re: Front LSD !!!!!!!!!!!!!!!!!!

Postby Flying Bajan » Thu Oct 06, 2011 1:50 am

Aside from more straight line grip for the big power guys, in terms of cornering, when the car gets sideways, you can point the front wheels where you want to go and use the throttle to pull the car where you want it to go. It also helps to balance the car better, reducing oversteer on corner exit and giving better drive out the corner.

All proper AWD rally cars have some form of front lsd and either a rear lsd or a spool in the rear end (not taling about those with active front and rear diffs of course). I've driven a Group A evo III with 340bhp and 450ft/lb torque (34mm restrictor on max spec Gp A engine) on several events both with and without the front LSD installed and the car was MUCH quicker and planted with the front LSD installed.

The ex-works group a ST185 that I was privelleged to drive briefly once also had a front LSD (and center and rear too).

Usually, plate diffs are used in rally cars, but a helical diff is more suited to street driven cars as less maintainence is required in the form of replacing diff clutches, etc.
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Re: Front LSD !!!!!!!!!!!!!!!!!!

Postby celicat93 » Thu Oct 06, 2011 3:18 am

So what would be a maintenance schedule on a diff like this? Sounds very cool though, I love swooping corners.
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Re: Front LSD !!!!!!!!!!!!!!!!!!

Postby Flying Bajan » Thu Oct 06, 2011 3:45 am

There should be basically none, just normal changing of the gearbox oil (where the front diff lives) as there are no clutch plates, etc in a helical diff.... Think Quaife ATB guys.
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Re: Front LSD !!!!!!!!!!!!!!!!!!

Postby underscore » Thu Oct 06, 2011 4:38 am

Pretty slick, I can put the more standard parts on hold if this would be possible to get. Would it pair up fairly well with the RC rear diff?
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