[robc1976]

Originally Posted by whosdady

Unfortunately I've had the unique opportunity to have both styles of LSD's in my 335i. Without a question, the Giken is a stronger unit. VAC built both of my LSD's and the Quaife (helical style) lasted six months before it gave out. The Giken on the other hand is still going strong... The main difference between the two are gears vs clutch packs. I think in general, a helical unit maybe considered stronger and always requires less maintenance. However in this comparison, the referenced mechanical lsd (Giken) is more robust and instant. I believe the Giken for our car uses 28 clutch packs.

I should note the Giken coming on more quickly is easily noticed while comparing the two LSD's above.

Totally agree

[Cloud9blue]

Originally Posted by whosdady

Unfortunately I've had the unique opportunity to have both styles of LSD's in my 335i. Without a question, the Giken is a stronger unit. VAC built both of my LSD's and the Quaife (helical style) lasted six months before it gave out. The Giken on the other hand is still going strong... The main difference between the two are gears vs clutch packs. I think in general, a helical unit maybe considered stronger and always requires less maintenance. However in this comparison, the referenced mechanical lsd (Giken) is more robust and instant. I believe the Giken for our car uses 28 clutch packs.

I should note the Giken coming on more quickly is easily noticed while comparing the two LSD's above.

That's interesting to know. Guess it comes down to luck and install for these things. No doubt OS Giken is a superior unit for the application, but I have seen some horror story with the particular unit as well.

http://www.e90post.com/forums/showthread.php?t=1044864

[robc1976]

Originally Posted by Cloud9blue

That's interesting to know. Guess it comes down to luck and install for these things. No doubt OS Giken is a superior unit for the application, but I have seen some horror story with the particular unit as well.

http://www.e90post.com/forums/showthread.php?t=1044864

okay......wow.....I may have to retract my statement then. Good info

[Tony@vargasturbotech]

An Os will not hold anywhere near those power levels, they routinely break around the 500WTQ mark. We are dealers for wavetrac, and in direct contact with them. We were told the unit is good for over 1000 ft lbs of TQ. We have thrown almost 700 ft lbs at it repeatedly and it is still as quiet as it was the day we put it in. Dzenno has had very bad luck with Quaifes, he went through two of them, put in a wavetrac and never had another issue. I would go Wavetrac or M-Factory for the built, if it were me.

[ethanjoon]

Now that is the definition of a sleeper Amzing

[robc1976]

Originally Posted by Tony@vargasturbotech

An Os will not hold anywhere near those power levels, they routinely break around the 500WTQ mark. We are dealers for wavetrac, and in direct contact with them. We were told the unit is good for over 1000 ft lbs of TQ. We have thrown almost 700 ft lbs at it repeatedly and it is still as quiet as it was the day we put it in. Dzenno has had very bad luck with Quaifes, he went through two of them, put in a wavetrac and never had another issue. I would go Wavetrac or M-Factory for the built, if it were me.

I am just going by what wavetrac told me, I hope the above is true...I have a wavetrac lol!

[HeavyMetalRocker]

Well after doing some short research and digging around I'll probably go with the Wavetrac. If it DOES fail, I will at least not have spent an arm and a leg on it!

[EJ_3]

Originally Posted by Tony@vargasturbotech

An Os will not hold anywhere near those power levels, they routinely break around the 500WTQ mark. We are dealers for wavetrac, and in direct contact with them. We were told the unit is good for over 1000 ft lbs of TQ. We have thrown almost 700 ft lbs at it repeatedly and it is still as quiet as it was the day we put it in. Dzenno has had very bad luck with Quaifes, he went through two of them, put in a wavetrac and never had another issue. I would go Wavetrac or M-Factory for the built, if it were me.

Tony beat me to it. MFactory is another great solution at a great price that can hanle up to the 1000 ball park. Forged and Double Tempered. Surprisingly tough unit.

[robc1976]

Originally Posted by HeavyMetalRocker

Well after doing some short research and digging around I'll probably go with the Wavetrac. If it DOES fail, I will at least not have spent an arm and a leg on it!

I am doing the same and keeping my wavetrac, glad you made this thread

[HeavyMetalRocker]

Originally Posted by robc1976

I am doing the same and keeping my wavetrac, glad you made this thread

Shit, me too! lol

[robc1976]

Originally Posted by HeavyMetalRocker

Shit, me too! lol

lol!

[whosdady]

Originally Posted by Cloud9blue

That's interesting to know. Guess it comes down to luck and install for these things. No doubt OS Giken is a superior unit for the application, but I have seen some horror story with the particular unit as well.

http://www.e90post.com/forums/showthread.php?t=1044864

I completely agree that it comes down to install and luck, but also preference.

The link above does not show anything IMHO. That guy (with all of 4 posts) doesn't even own an e9X. (Who knows if he even owns a BMW?) Show me a failed Giken within the E9X community. If you find one, I will show you 10 wavtracs that have failed. Google keywords like: 335i and clunk, thump, whine, lurch, etc... Guess what type of LSD is most commonly associated? I can think of at least 3 vendors on this forum that used to sell wavtrac. They have since stopped due to issues. With that being said, there are many guys who have had good luck with them. Two of my best friends on the forums have them, and have only had minor issues. Unfortunately mine were catastrophic. They started with a little thump, turned into a clunk and later a lurch. After draining the fluid I had metal shavings like the link above.

If you really want to know the truth, discuss this concern with a vendor that specializes in LSD's and sells several brands. IE Diffsonline, VAC, etc. When you get an opinion from a vendor that carries only one brand, you can expect one recommendation... If you are really wondering how much power the Giken is rated at, you may look here on the company website. http://www.osgiken.net/racing.php. Do a search with keywords that include Supra, AMG, Viper and BMW. Look what LSD the Redline Time attack car uses. Giken rates their LSD's and clutches for over 1000 hp, eventhough there are few cars at that level in our community.

It's a fact that professional race car drivers prefer mechanical LSD's because of their "full locking" capabilities. They prevent the slip before it gets out of hand, which the helicals aren't designed to do. The only better option (in drag racing) is a smooth lsd which is not for street use. This is where both rear wheels are permanently locked. For all other professional race events, mechanicals are the preference of professional drivers. That is not to say helicals don't have there place. For the average guy who prefers little maintenance and isn't worried about loosing traction before its too late, it's a great choice. It will usually hold the power and is always more economical.

[HeavyMetalRocker]

Small but fun for me update, I'll be getting the FuelIt Stage 3 drop in ordered in the next few days and should be getting my HPFP in from ECS soon. Weather permitting I'm gonna go hit up a few logs for a before and after. Granted I know the results may be somewhat skewed with the HPFP on its last leg, you should still be able to see somewhat of a difference between an inline 255 with an old LPFP and Steve's stage 3 setup! Note; until I get the port system, the stage 3 will be operating in a single pump stage 2 setup!

[Cloud9blue]

Originally Posted by HeavyMetalRocker

When you have so much crap done to your car you tend to forget what's what when blindly typing a list lol. I didn't put it on my current build list... I have stoptech brakes and currently street/track HAWK performance ceramic pads. I also have the performance oil cooler with 160 thermostat. I do plan to switch to a dual unit though but that's not on my main radar as my current cooling setup does very well in the Texas heat. Also, I'll never go with an adjustable coilover suspension unless it's a trailered dedicated track car which this will not be. The power aspect isn't to just have more power... RB's are great for the street and occasional track event. However, they aren't so great for extended abuse. ANY car would do better off using a system that was designed and built from the ground up to maintain the level of performance over a duration and consistently perform.

Not sure why the hate on coilover. In my case, good set of coilovers actually ride noticeably more comfortable on street in you dial down the rebounds and compressions, even with spring rates 2-3x higher than the stock ones. And with spring thrust sheets, a properly installed kit should be noise free as well. The only possible increase in NVH is if you make the switch to camber plates with solid spherical bearings, but even that is minor since our car is so well insulated. What's the point of huge powers if suspensions can't keep up? I still think you got your priority backwards, for a track car, it should always be chassis first then power. But have to admit, 500-600whp power is addicting though.

FYI, with stock size rotors, I can guarantee you those HAWK ceramic pads won't last for a session once you really pick up speed.

[HeavyMetalRocker]

Originally Posted by Cloud9blue

Not sure why the hate on coilover. In my case, good set of coilovers actually ride noticeably more comfortable on street in you dial down the rebounds and compressions, even with spring rates 2-3x higher than the stock ones. And with spring thrust sheets, a properly installed kit should be noise free as well. The only possible increase in NVH is if you make the switch to camber plates with solid spherical bearings, but even that is minor since our car is so well insulated. What's the point of huge powers if suspensions can't keep up? I still think you got your priority backwards, for a track car, it should always be chassis first then power. But have to admit, 500-600whp power is addicting though.

FYI, with stock size rotors, I can guarantee you those HAWK ceramic pads won't last for a session once you really pick up speed.

I don't like coilovers for many reasons. Mostly because I don't want to fuck with them and I hate the "adjustability". I'm going to be fine with the H&R Touring. I like progressive suspensions much better in my own experience. It should also, with every other component of the suspension that I'm changing, be more than adequate for my power goals and what I'm expecting from it. Like I said before, if I were building a dedicated track car then I'd go all out with suspension! And on the HAWK pads, I know man... I'm not new to this lol I'm 31 and came from the LSX world. I've been around racing my whole life. Drags, circuit, motorcycle... The breaks are great on the street but I know for a fact they fade after a few hard braking sessions hahaha I care more about just making the car stupid fast first. I NEED fuel upgrades as in the stock pump is going out, so therefore fuel is being addressed first. I also NEED to do something about my turbos or possibly head therefore the turbo setup or possibly head work will be second. ETC... this is still my daily and I need it to run right before I care about how the turn in is or how it stops. Both of those functions are currently working properly.

[Cloud9blue]

Originally Posted by HeavyMetalRocker

I don't like coilovers for many reasons. Mostly because I don't want to fuck with them and I hate the "adjustability". I'm going to be fine with the H&R Touring. I like progressive suspensions much better in my own experience. It should also, with every other component of the suspension that I'm changing, be more than adequate for my power goals and what I'm expecting from it. Like I said before, if I were building a dedicated track car then I'd go all out with suspension! And on the HAWK pads, I know man... I'm not new to this lol I'm 31 and came from the LSX world. I've been around racing my whole life. Drags, circuit, motorcycle... The breaks are great on the street but I know for a fact they fade after a few hard braking sessions hahaha I care more about just making the car stupid fast first. I NEED fuel upgrades as in the stock pump is going out, so therefore fuel is being addressed first. I also NEED to do something about my turbos or possibly head therefore the turbo setup or possibly head work will be second. ETC... this is still my daily and I need it to run right before I care about how the turn in is or how it stops. Both of those functions are currently working properly.

Ha, alright, I get you on the adjustability part. It is a bit of pain to deal with until you get it just right. I would stay away from any H&R products for quality control reasons, seen too many problems with them. Look into Bilstein and Koni's offer is my suggestion. If you want something more high end, JRZ offers shocks for our platform that can be used with stock type springs.

[robc1976]

I love my KW clubsports

[HeavyMetalRocker]

My other build that I'm starting back on due to some unforseen and unexpected down time with the 335i.

2007 Harley Davidson Dyna Street Bob
Lot's of plans here too. Lower, add some black stuff, FWD Controls, bob the rear and ditch that nasty oem brake light lol Maybe some different pipes.. AND WHEELS DEFINITELY WHEELS lol

[HeavyMetalRocker]

I've been talking with a few of my Corvette friends (a full built C5 Z06, a head/cam, headers, intake, tune C6 Z06, and my other buddy with a built C6 ZR1) and the two C6's argue that while track days are fun, they can't ever punch it as they lose traction and can never get to going before they have to slow down. The C5 on the other hand is built for track days so he's happy lol. So... for the time being I'm going to go ahead and stick with the RBs and give the Trueform Tech intake a try! I'm still going to be upgrading the fuel system to go full e85 and the rest of the build will come sooner than later! I may try to do a bit more on the weight loss side depending on what I can do that isn't completely gutting my interior! More to come in a few weeks when I get the intake setup and hit the dyno!

[Give_Em_The_DD]

Originally Posted by HeavyMetalRocker

I've been talking with a few of my Corvette friends (a full built C5 Z06, a head/cam, headers, intake, tune C6 Z06, and my other buddy with a built C6 ZR1) and the two C6's argue that while track days are fun, they can't ever punch it as they lose traction and can never get to going before they have to slow down. The C5 on the other hand is built for track days so he's happy lol. So... for the time being I'm going to go ahead and stick with the RBs and give the Trueform Tech intake a try! I'm still going to be upgrading the fuel system to go full e85 and the rest of the build will come sooner than later! I may try to do a bit more on the weight loss side depending on what I can do that isn't completely gutting my interior! More to come in a few weeks when I get the intake setup and hit the dyno!

Nice! You're going to love it!

[HeavyMetalRocker]

Finally getting some ground with my build. Small gremlin after gremlin have been taking a toll on my wallet and car!!! A few to name, window regulators, door lock actuator, a/c line shot, some shit with my clock spring/controls, rear tires.... hehehe, BUT, I'm getting some fun things done in the semi-extremely near future!!! Some go fast goodies, some repairs, some other goodies... Should be a damn fun summer!!! Why work in the winter when you can sweat your ass off in the summer!!! lol Stay Tuned!!!

[HeavyMetalRocker]

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