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Old 11-07-2012, 05:25 AM   #41
Bdave
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So, I am gathering that going sideways has nothing (or not as much as we thought)to do with the stock BMW diffs and the way they lock up. The OEM diff and LSD is doing a pretty good job. Conclusion, not fact.

OSG LSD is not even needed to help keep the car straight.
Or maybe the OSG does help, but first it needs a car that has a proper alignment (toe in on the rear) and the OSG should be properly ADJUSTED to do anything well. This remains to be seen. But probably, yes.

Right now, according to OSG North America every single one of their Super Locks that were installed in any HPF car is going to be locking up too fast. The higher the RWHP, the worse the OSG super Lock performs. Fact.

If the out of the box OSG Super Lock is set up for 270 rwhp, then the unit is being overpowered by a factor of two and almost three times depending on what the HPF car is putting to the ground. Fact

So, we dont really even know how well the OSG works until someone sends it back and gets it properly tuned...to lock up MUCH slower. Conclusion.

I do believe that a lot of cars end up slewing sideways violently under acceleration. So do you guys think every single case is due to alignment alone? Well, worn or maybe even soft stock RTABS may contribute too. I can see that. Dont forget tire compound. Conclusion.

So, Jake should pursue several avenues FIRST before he even considering an OSG Super Lock. Get a really accurate alignment, install stiff RTABS. Poly MAY be good enough....delrin is pretty rough. IDK. A tire compound assessment should also be on his list. Conclusion.

It is very possible that the OSG is NOT needed to keep our cars straight. That is a function of the above mentioned factors.

It is not beyond the realm of possibility that a WELL TUNED Super Lock is going to AID straight line grip. The super lock may well benefit the HPDE user better than the drag racer or street driver. Is that fair to say? its a conclusion, not fact.

And last, an out of the box OSG Super Lock installed in a very high HP HPF car may well HARM the performance by locking up way too fast. I think that is fair to say. Fact..maybe..Probably.

ANy new buyers of the Super Lock should darn well be having the NA facility adjust the lock up BEFORE it ships. Or maybe HPF might invest in some Spec X High Horsepower models. You get a pre tuned LSD and what ever fancy laser logo to boot.

So really we dont even know the full potential of these units until somebody runs a TUNED OSG Super Lock. Conclusion.

It is also possible that a well tuned OSG Super Lock up may well compensate for faulty alignment and soft RTABS. We have nothing to corroborate this because everybody's HPF OSG is not tuned properly..yet.

So pay attention to your rear alignment, RTABS, and tire compound no matter whose LSD you are running. make sure the LSD you have is properly tuned if that is an option.
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Old 11-07-2012, 09:16 AM   #42
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I just found a pic of bdave after I read this entire thread.

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Old 11-07-2012, 10:16 AM   #43
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Lol...I don't even read these page long posts anymore
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Old 11-07-2012, 10:53 AM   #44
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I just found a pic of bdave after I read this entire thread.

What do they say? A picture is worth a thousand words?

What's an animated gif worth? I'd say it depends on the image. Cute pic.

If you are the owner of a OS Giken LSD or considering any LSD, this information is golden. I'd say he posted two animated gifs worth of info that pretty much summarizes the "full circle" of the issue (except that consideration of...). Information like this is better than sliced bread.

If you don't have LSD or don't know what it is: they sell it on little bits of dense paper... muahahaha

Ok idiotic joke. I didn't even laugh.
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Old 11-07-2012, 12:10 PM   #45
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OSG is very much on board to come up with a good all around tune for their Super Lock that will work much better with the vastly larger HP and TQ of the HPF cars.



Hi Dave,

Yes, Mark and I were talking about this last night, so its good to know that we are both
on the same page. All the HPF setups have immense power, so it makes total sense that
people would experience too much lock, especially when equipping street tires. I will
continue to let Mark spearhead this project so that it keeps things simple.

Thanks,
Bernard

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Torrance, CA 90504
PH: 310.243.1348
FX: 310.516.0858



It is absolutely heart warming to feel all the love for my efforts to help improve a product for our cars. Thanks, guys.
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Old 11-07-2012, 12:31 PM   #46
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BDave, I love your passion for these cars, and your willingness to contribute to the forum, but you should try to summarize, and or bullet your points. It would make it easier for most of us to participate in conversations with you. Its hard to read 4-5 paragraph posts, over and over when most of us forum goers only have time for touch n' go.
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Old 11-07-2012, 05:43 PM   #47
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BDave, I love your passion for these cars, and your willingness to contribute to the forum, but you should try to summarize, and or bullet your points. It would make it easier for most of us to participate in conversations with you. Its hard to read 4-5 paragraph posts, over and over when most of us forum goers only have time for touch n' go.
Bdave's posts are at least 4-5 thumb flips on my iPhone! Exhausting!!!
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Old 11-07-2012, 07:20 PM   #48
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Bdave's posts are at least 4-5 thumb flips on my iPhone! Exhausting!!!
^ This...scrolling by the acclaimed "Bdave" posts is exhausting...its almost a form of trolling.
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Old 11-07-2012, 07:42 PM   #49
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I love Bdave's posts. He semi-reminds me of my 10 year old son who talks and talks and talks and talks and half the time I don't really listen, but you know what... in like 3 years he isn't going to give a **** about talking to his Dad and at that point I will really miss listening to all that **** he spews to me now.
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Old 11-07-2012, 08:13 PM   #50
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Bdave's posts are at least 4-5 thumb flips on my iPhone! Exhausting!!!
I'm developing what's known as "Carpal Thumbitis"
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Old 11-08-2012, 06:14 PM   #51
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I love Bdave's posts. He semi-reminds me of my 10 year old son who talks and talks and talks and talks and half the time I don't really listen, but you know what... in like 3 years he isn't going to give a **** about talking to his Dad and at that point I will really miss listening to all that **** he spews to me now.
Amen. Quoted for truth. I will have a few seconds more patience with my son tonight thanks to your logic M5chas.

The M-Variable lock is an excellent LSD from the factory, albeit not intended for cars sporting the HPF 700 rwhp club sticker. I would think addressing spring rates, alignment settings, tires/pressure, and suspension bushings would yield better results for the high HP cars looking to track straight.
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Old 11-09-2012, 06:58 AM   #52
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I run a 2.5 and the OSG and have NT05 275 19s when the car spins it goes straight as an arrow, if I'm in a straight line and the wheel is straight. (Only minor corrections to input r needed in 2nd thru 3 .) If there is any angel at all the car SNAPS sideways and u need to steer with wheel and throttle. ( I love that part, raise the hair on the back of ur neck) Takes experience and a skid pad with water is the best way to learn

I've been very impressed with the traction and how the car tracks when spinning and keeping ur foot in it
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