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ZX3_Cruiser 10-20-2011 02:04 AM

LSD worth it
Is it worth time and money for LSD at the dragstrip. What are pros and cons of the diffferent brands? Opinions on which brand to get for drag applications. Just on an information hunt before i go spending money.

sleepyboy 10-20-2011 02:07 AM

It's probably not worth it the time and hassle unless your doing the work yourself and even then it's still probably not worth it. I do feel I need one but it's not really needed except when I turn, I would like to put the power down coming out of a turn more than I can now.

What times are you running right now?

Elizabeth 10-20-2011 03:25 AM

When I had to replace the differential in my Contour SVT i had the tranny rebuilt and a Torsen diff installed (at 96,000mi)
The limited slip gave a big boost off the line IF you could get it locked up immediately.
The one true drag start I did just to 'show off' The one wheel started to spin as usual and within a quarter second the second tied up and the car launched pretty spectacularly with (felt like) twice the thrust forward in the first fifty feet.
So the first five feet normal wheel spinning going nowhere then the grab and the car flings itself forward.
The tire track laid down the non-spinning wheel once it grabbed really left some 'solid'(good, showing it was really locked to pavement) rubber track without spinning. it was interesting.
That was my only drag race like experience with having the locking diff with a MTX75
If I were drag racing as a hobby, that extra thrust was worth the money anyday!
I did it because the diff was toast anyway and had to be replaced. So the Torsen only cost a little more than a new OEM one anyway.
So I would say if you do your own labor yeah. Or if you need a new clutch, that cuts to labor for just the diff.

sleepyboy 10-20-2011 04:02 AM

It would help for sure but from a cost stand point it's not worth it unless the tranny's out of the car. Buy stickier tires, they are cheaper than a diff and will help with any traction issues. The stock diff is the weakest link in the drive train though and I know this from experience. Also one wheel peel is embarrassing at the track lol now beating the rich boy noob in the S2000 next to you will help bring that embarrassment down a lot more lol

sleepyboy 10-20-2011 04:14 AM

Sport Compact Car magazine says it best here in the first two paragraphs. I feel the same thing they discribe. Love the part about the focus lifting it's leg and lighting one up lol

Dgc333 10-20-2011 06:08 AM

If you are serious about drag racing a limited slip is just about mandatory.

Roushturboedzx3 10-20-2011 10:16 AM


Originally Posted by Dgc333 (Post 3864598)
If you are serious about drag racing a limited slip is just about mandatory.

this guy is spot on, i can take some pics of my broken diff from when i launched on just some drag radials making around 220whp

ZX3_Cruiser 10-20-2011 02:24 PM

any difference in the torsen and quaiffe? quality experiences. planning on doing clutch flywheel and everything so figure while i was doing that might as well get the lsd. another question. thinking about doing the lsd install myself. anyone know of a good write up on doing the lsd.

macdiesel 10-20-2011 02:35 PM

The torsen is from Ford racing and cheaper, no warranty. The quiaffe is from the UK, expensive, warrantied for life, really good reputation. Quiaffe probable has better quality. I'm currently getting a torsen installed because my clutch was toast. Cost and my time was a huge factor. I know there is a getrag torsen install video on youtube from illinipo.

Nickgt40 10-20-2011 02:51 PM

If you're doing it. Look into a Kaaz.

If you've got wheel lift, this is a great option.

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