BADNEWS
Member
RedCelicaTRD":3kabej65 said:Put on your big-boy pants and make it happen!
So does that mean you're possibly in for one if this gets going?
RedCelicaTRD":3kabej65 said:Put on your big-boy pants and make it happen!
evo stuff":p4r9d219 said:This helical limited slip differential (LSD) takes the place of the Lancer Evolution's open front differential, giving the RS mechanical front and rear differentials that split power delivery between their respective left and right wheels, and a center differential that splits the power between front and rear. The front differential's helical design provides it with smooth operation and superior responsiveness. Small in both size and weight, the helical unit does not require special oil or additional maintenance.
Helical-type limited-slip differentials offer several advantages over the clutch-type or viscous LSDs. Viscous limited-slip units tend to wear out after extended use, as their oil is heated and reheated until it degrades, rendering the unit ineffective. Clutch-type differentials provide good off-the-line traction, but the 50/50 stability that's beneficial in a straight line is not so desirable when a vehicle is turning. The helical-type limited slip provides better durability and performance when it's needed most: while turning. Unlike an open differential, which shifts power to the wheel with less grip, the helical LSD constantly shifts the bias toward the wheel that has more traction.
Under straight-line acceleration, power remains evenly split between the front wheels. While cornering (e.g. accelerating out of a turn), the helical LSD directs power away from the inside wheel and toward the outside wheel, allowing the driver to begin accelerating earlier and exit the turn at a higher speed, without losing traction in the process.
more evo stuff":p4r9d219 said:I'd say durability/reliability... Not a fan of clutch type front diffs on anything but a race car that gets frequent servicing. People can say well I did this, or I did that. However, 10k (or sometimes MUCH less) miles later, someone who truly knows what a car is supposed to do will notice the clutch type diffs wearing out. Whereas the gear types like Quaife, you take it out when you wear out the car from around it (sleight exaggeration )... Pardon the grammer/spelling from the phone/freeway.
For example, my stock rear diff is shot... My older OE RS front diff still going strong. IMO the RS front is fine for the road racer/daily driver. However, the drag racer/auto-X clutch pedal side stepper would be better served with the Quaife/Wavetec type units for the front. For the rear, being that the Evo likes to hike a rear leg, I WOULD stick with a clutch type out back for obvious reasons. Not to mention, it's easy to get to, and about $250ish for "good" rebuilds.
even more evo stuff":p4r9d219 said:I've raced my hillclimb car with both the Cusco and Wavetrac. You could feel/hear the Cusco working, very aggressive and you could tell it was working to pull you out of the corners. The Wavetrack works, but you don't feel like its working as hard. My Cusco was a 1.5way diff so they're slightly different in that respect, but I'm primarily comparing thier on-throttle performance.
FWIW, I run on mixed surfaces, both tarmac and gravel and have a MoTeC MDC to control the ACD system. Rear of the car had a 2-way Cusco for a bit, and now I've got a Carbonetics 1.5way in the back.
toayoztan":2czj9oel said:So I may be interested. However, I've not been up to date with anything regarding any of our differentials (front, center, rear, what's weak, what's not, etc.) - too busy with school the past 3.5 years and interviews at the moment.
To make this a more proper GB and hopefully grab more interest and attention, can anyone give a break down on what advantage this has over the stock unit, how much power can we expect this to hold, what warranty would be in place, what race application this mainly applies to, would this allow the car to be streetable, what rear diff setups can this be used with and shouldn't be advised using with, would people have to replace this themselves, etc..
I love that something is getting started on this though.
Bryan
Sounds like this is the post that stops us chasing our tails.underscore":3h1zttb6 said:Ok so reading all that, I would imagine we only want a helical design as almost everyone has a street car or uses their Alltrac in more than just a straight line.
REALTUNE 10/6/10":3r8rwtot said:An update : Design work is done.
I will start taking deposits this weekend. We will be doing batches of 5 at a time. Wait time once I send the deposits in will be 8 weeks.
These will carry a one year warranty against any manufacturer defects. That doesnt mean you can drop it off a building and we will warranty it
The LSD will be a helical gear (quaife style) for those that missed it.
I will have total price etc. up once I start taking deposits.
realtune 10/28/10":3r8rwtot said:I am ready to take deposits on the Realtune LSDs.
Price will be $1400 shipped to your door in the lower 48 states. Canada/Alaska/HI please add $40. I will need $700 down to lock you in on an order. Wait time is 8-10 weeks once we have 5 orders filled.
These will be direct drop in. No machine work needed on your end.
"Quaife" style LSD
1 year warranty against breakage [does not include labor or shipping one way]
This will most likely be your only chance to purchase a true LSD for your Caliber SRT-4. I will start with 5 units. If they sell good we will make 5 more and so on but your time frame are months in between.
Please contact me or Whoosh via PM or email Realtuned@yahoo.com
If someone does not have paypal, I can add it to the website for you to pay with a CC but will not do so unless someone needs it.
Realtune 3/30/11":3r8rwtot said:Bump. I have one spot left
Realtune 7/25/11":3r8rwtot said:Ok guys!
I got side tracked but I will be double checking a few things the next week or so. All LSDs are done waiting my approval to start shipping.
Now is the time I need to collect the final payments.
If you have paid, please shoot me a PM and we will discuss final payment.
Please do not delay!
Realtune 10/6/11":3r8rwtot said:Finally an update as I was able to get the diff out of the test car tonight:
We have one area that needs to be touched up machining wise. This will take a bit of time but other than that we are good to go. I am happy with the pre-load and characteristics of the LSD but alas they were not machined 100% correct and if we dont touch it up....it could cause future problems. I doubt anyone wants that so I think we [1st batch owners] will all be in agreement that the extra bit of wait is worth it
Thanks again to all those involved for hanging in there as I realize we are waaay past our timeline.
Realtune 1/16/12":3r8rwtot said:Ok I have a dilema guys.
I will have these back at the end of next week. Everything should be good to go but simply put....I do not have a test car ready to go until the end of March as its bare chassis right now. I can test fitment [which is what I was fixing] but not opperation [which was good from previous testing]
Does anyone who has purchased one of the 7 have time to install right away and give me feedback? Again from my testing before we should be good as what I was fixing had nothing to do with opperation. Im 99.99% sure they are ready to go but before I ship out all 7 of them I would like to be certain
I will offer free shipping and a Realtune T-shirt to whoever can help me out. Otherwise we might be stuck until March.
The install is basically a clutch install [pull trans, split case - no special tools, remove stock ring gear and install on new LSD, reverse removal process] Should be very easy for anyone with a bit of mechanical wit.
Any helpers [only those who have paid already] ?
Realtune 2/2/12":3r8rwtot said:LSD test fitment is golden. I have a car Im going to do the final testing in next week and will have an update after that.
Thanks guys!
As a heads up, if all goes well as planned, I will be starting another batch order shortly after. Im hoping to be taking orders within the next 2 weeks
Realtune 2/11/12":3r8rwtot said:LSD has been getting a beat down the past few days. Fitment is perfect and function is perfect. Going to give it a few more days an/d pull her back out for final inspection. I expect everything to be good to go and the pre-orders to start shipping /late next week /early the following.
Its been a long journey but well worth the wait IMO.
Realtune 2/16/12":3r8rwtot said:Ok guys, the DIFFs are in and ready to start shipping!
Anyone that ordered, please contact me with your full mailing address and the date you paid. I will get you the shipping quote and get the package out as soon as we are square!
I will have pics up tomorrow for others to drool over
Sheldon37 2/29/12":3r8rwtot said:Mine arrived today. I just hope There is enough room where my car is parked at the moment to allow installation. I really wanna feel the changes this will make in the car. Cheers
Ltromance 3/31/12":3r8rwtot said:Holy jesus. This thing is so worth the money, torque steer is virtually NON existant, you can just feel the tread tearing off your tires when you hammer on it. LOVE the feeling of the car being able to launch in a straight line, all you have to worry about is keeping the tires from spinning too much.
Thump911 9/30/12":3r8rwtot said:If you drive your car AT ALL, you need this! I just ran this badboy through it's first autocross yesterday....HOLY CRAP!!! Let's just say I made top 5 out of 82 cars yesterday!!! Well worth the investment and wait (for me at least!). Thanks guys...keep up the good work!!!
Alltrac101":3r8rwtot said:In all reality its a 6 month to year out