I have done searches, talked to several people who have used them and sell them, and read every thread on h-t that talks about the OPM/DGM LSD. I am trying to find out if this LSD would work well for a daily driven street car and not wear out pre-maturely. This is for a 94 Acura Legend GS 6-speed, planning to push 400+whp, mainly street driven. Perhaps occasional 1/4 mile.

Any LSD for this application would be full custom, and most of the major LSD companies such as Quaife, Kaaz, ATS, etc will not make one unless there is an order of 30 units or more. Any advice/suggestions would be highly appreciated.

Thanks,
Imran
desijigga786@yahoo.com

 

The OPM diff won't work with hi-horsepower cars.. Its pretty useless with my 200whp.. And I've sent it back to get the clutch packs replace and bigger springs put in... It seems to work great on the lower hp cars though..

Just get a quaife, if it blows, send it back..

 

What makes it useless with your 200whp? It doesn't do anything? Or it wears out too fast? Why did you send yours back, did it wear out or wasnt performing well? How long did you use it for, and how much is the rebuild?

When I spoke with Walt from Delta Group Motorsports and he asked what I would be doing with the car, I told him I would be pushing 400whp and driving mostly on the street, maybe occasional 1/4 mile track. He did not say it wouldn't work or anything like that. He said it is a race unit and has been used in conditions much more extreme than what I am describing with no issues.

I WISH I could get a Quaife, but they won't make one for my car. Neither will most other LSD companies. Any suggestions?

Thanks,
Imran
desijigga786@yahoo.com

 

I am trying to find out if this LSD would work well for a daily driven street car and not wear out pre-maturely.

save your money and get a real LSD

 

Corey, Jack, and I do not like the OPM in Corey's car.

Warren

 

1) Buy 30 Quaifes
2) ...
3) Profit!

 

Oh, I thought you had a integra GS, not legend GS.. won't the CL-S LSD's fit in that tranny case??

 

Legends were C-Series (C27A1, C32A1, C35A), not J-Series. Maybe an NSX LSD will fit?


Modified by SPiFF at 3:20 PM 5/12/2004

 

Question: What is a "real LSD"? Also, if a clutch type unit is felling on a 200 WHP car, then why do cars that drag race with over 500 HP use clutch type units? Also, why is the OPM LSD felling on a 200 WHP car when similar units are on SCCA National cars with more HP? Oh, and another, why do the World Challenge cars have clutch unit LSDs and they are putting out over 200 WHP and it looks like they are finishing races? Sorry for the questions, just curious.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by J28S &raquo;</TD></TR><TR><TD CLASS="quote">Question: What is a "real LSD"? Also, if a clutch type unit is felling on a 200 WHP car, then why do cars that drag race with over 500 HP use clutch type units? Also, why is the OPM LSD felling on a 200 WHP car when similar units are on SCCA National cars with more HP? Oh, and another, why do the World Challenge cars have clutch unit LSDs and they are putting out over 200 WHP and it looks like they are finishing races? Sorry for the questions, just curious. </TD></TR></TABLE>

Clutch type units aren't inherently bad... who makes them is usually where 'error' occurs.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by LeGeND4LiFe &raquo;</TD></TR><TR><TD CLASS="quote">This is for a 94 Acura Legend GS 6-speed, planning to push 400+whp, mainly street driven. Perhaps occasional 1/4 mile.</TD></TR></TABLE>

This is not a flame...

You might try asking this in the drac racing area.

 

There were a couple of world challenge proteges with around 250 at the wheels doing fine with the OPM LSD. One of them was a regular top 5 finisher and won a couple of races.

Not bad for something that isn't real.
But I could be wrong. Maybe I dreamt it.

Scott, who can't explain Corey's issue because nobody else seems to be having it, but knows Corey has good feel for a car and believes what he says &lt;shrugs&gt;.

 

Imran, I am more curious as to how you plan to eek 400+whp out of the car and how usable that will be when done. You could turn on TCS (just a joke!). Having owned both a Legend Coupe and CL-S, I think you are going to run into a lot of issues with the car outside of wheelspin. They are tanks, 3700# and 3500# respectively IIRC. Don't get me wrong, I loooooooved my Coupe and am constantly scanning classifieds for a 6sp Coupe on the cheap (ahh I can dream) but at some point power-wise, the car pretty much is going to need a cage and fire system no? T'would be a shame IMVHO as its such an absolutely beautiful car in and out.

To your concern on the diff, I own three of them. After running one in the race car (sub 120 whp however) for two years, I bought a second one for my backup tranny (intended to run a different FD for certain situations) and had one made (like your situation) for my 944-S (188 hp) which I track/auto-x and daily drive. I haven't had the opportunity to take out the 944 yet with it as its still being pieced together after the #2 rod left the building but wouldn't have had it made if I hadn't had such good experience w/ the one in the racecar to date.

I wish you luck with it but man, 230 hp was all I ever wanted in that car - ok, I would have liked an extra 20 or 30 but NO MORE Best of luck!

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Catch 22 &raquo;</TD></TR><TR><TD CLASS="quote">Scott, who can't explain Corey's issue because nobody else seems to be having it, but knows Corey has good feel for a car and believes what he says &lt;shrugs&gt;.</TD></TR></TABLE>

I don't know either Scott.. Maybe the Mazda Diffs are bigger and can fit more friction material, hell if I know.. =~)

 

I too am trying to get a feel about OPM's LSD. With my car, there are very few choices out there (at least to my knowledge).

For a "low" HP car (110 stock) it sounds pretty good. How does it perform versus other types?

 

There is no way you are going to pump out 400HP out of a legend motor. Second you can wield the diff that should hold.

 

I would never say anything bad about OPM but I too did not feel like my OPM diff was doing much. I had one on my 90 Prelude Si for street use and I could not feel it engage or pull the car around like the KAAZ does in my GSR. That may not be a fair comparison given the price differential. The only way I knew I had the OPM diff was that I could jack my front end up and both front wheels would spin forward. I am wondering if they don't work as well in heavier cars? My Prelude was 2800.

 

This is just speculation on my part, but in Chrisb's case it might not have been an aggressive diff because it was for a street car.

From what I understand Steve can set those things up about as aggressive or tame as you want them.

Just guessing, and I could be totally wrong.
But I have well under 100whp and I can feel the OPM diff pull the steering wheel in my hands.

 

Catch 22,
You have the OPM diff. - that makes me feel better about it. (I'm actually being serious here)

What are your thoughts on it? In a lower HP car, can you notice much of a difference beween having it and not having one at all? I realize this depends on the track, but just trying to get an overall idea. From my understanding, to be a front running FWD car you almost need a LSD.

 

Believe it or not open diffs and Phantom Grips are actually pretty popular in ITC because they offer a slight reduction in driveline windage (correct use of that term?) in a straight line. Will Perry runs a PG in his ITC car with unquestionable results. Puckett has been known to prefer an open diff in ITC depending upon the track.

Personally I started out with an open diff and didn't like it at all. Even with such a small amount of power I was still spinning the inside front in slow corners and killing my exit speed.
Installed the OPM diff at the recommendation of many and have been completely happy. Like the Subaru commercial says... The power goes to the corner with grip.

I've mentioned it before, but I had the gear type ITR LSD in my old Integra, and while I did like it, I feel the OPM unit is more aggressive. It actually could just be that the OPM unit is more abrupt, but I can definately feel it working and tell a big difference between it and an open diff.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Catch 22 &raquo;</TD></TR><TR><TD CLASS="quote">I've mentioned it before, but I had the gear type ITR LSD in my old Integra, and while I did like it, I feel the OPM unit is more aggressive. It actually could just be that the OPM unit is more abrupt, but I can definately feel it working and tell a big difference between it and an open diff.</TD></TR></TABLE>

The Quaife I have in my CRX provided the same night and day difference. It is funny, with the Quaife you know if you are not at the limit in a corner if you start to apply throttle and the front of the car pulls in to the turn.