Red Devil mkII - The Journey Continues

[grandturismo]

Some really great info, thanks for the links sambb.

Sean, I've been tracking both the Wavetrac Torsen type diff with my stage 3 GTI and when I moved to my built engine, giving me about around 100kwaw more, I then installed the VWR clutch plate diff.

I originally chose the torsten type LSD from Wavetrac after researching and was impressed with the engineering and quality of product... BUT torsten differentials only work during acceleration and they also rely on both wheels having a certain amount of traction. This was always going to be an issue moving to more power and trying to extract every valuable second I can out of the car.

I'm not sure if you experience some wheel spin driving hard through certain turns at Lakeside? Particularly out of Carousel?

The clutch-type differential works incredibly well on the track and I found that this section of the track I was getting the power down and out quicker with the change in LSD. Much better than the torsen diff when you want increased acceleration out of corners as it will transfer torque to the wheel with the most grip much more aggressively.

Having said all that, it has inherently brought problems to my gearbox with the added load and power. I'm also checking load angles as you know. I thought I'd mention that as I found I had no issues with the Wavetrac/power combination, in fact comparatively I was only marginally quicker with the same turbo setup, tyres and clutch plate diff. The difference is not huge between them but it's the better diff choice for the track.

The Wavetrac is still a great choice, as is the Quaife (any LSD really) but I'd make sure the clutch plate diff, if u go down that path, is of equal quality and well engineered as it will also probably be more expensive.

[seangti]

Thanks Alan. Yeah I have "one tyre fires" all over the place, even coming down the back past the bridge, that downhill left hander into hungry, lighting up the left in 4th gear at 150-160kph, haha, good for a laugh but quite brutal on the box once it grips as it levels out.

I think I'll make the decision based on price as I'm not chasing outright performance and had planned on a wavetrac from the outset, NA Auto were pulling the crown wheel off y'day arvo to measure so they could lock in some pricing. I now nervously await the phone ringing. Plus I really want the box back in a fortnight so I can try get it back in the car before my holiday. If I don't get it back a fortnight it'll possibly rule me out of June timeattack.

[Water Boy]

I believe the wavetrack/qaife is much nicer on axles and CV's. I have also seen them called TBD. Torque biasing diff.

The plate/LSD can be very violent as mentioned above.

Ive purchased a Qaife for my 02J. Will be a while before I can report back!

[seangti]

I went with wavetrac, it's on the way from the US at the moment and will be installed into the box next week. I'll have the complete box back in the car next weekend, though not yet sure if time will permit to be drivable next weekend... fingers crossed. Though beyond that, it'll be June until I can finish it. let's hope not

The pricing hadn't yet come back for the clutch plate diff, though indicatively was looking to be nearing an extra $1000. The other consideration was the wear rate. Whilst the car doesn't get driving often and wear only occurs when it's engaging, I didn't want to have to pull the box out again in 2-3yrs to replace worn plates. Whilst not a big issue, is still a consideration. I feel with carrying left foot brake during corner exit I can manage some of the shortcomings of the torsen style diffs. Chris Harris did a good video on left foot braking in an older focus RS. Worth a look.

[seangti]

I got the gearbox back last week and installed over the weekend. Another PITA job on the drive shafts and a little getting the gearbox mount aligned, would have been infinitely easier with another person. By way of the gearbox, it's now sporting a wavetrac diff and new bearings and seals. It feels like a newy now, albeit it a little tighter and more precise, really happy with the feel.

By way of the diff, yup, it works I've only had a few in-gear quick blasts, but it locks-up both fronts. It still spins 1st and 2nd as it comes on boost in straight line, there is a slight feel in it working the tyres much harder from left to right, it's really quite nice, grips and goes.

[Machine]

You're awesome, Sean. I'm happy for you. Can't wait for the next outing!

[vwthunder]

What size is the ring gear was it 113 ?

[seangti]

Yeah it's a 113mm ring gear, though apparently there's also other parts to measure too. I've got the one for the 02S gearbox, same as this: Wavetrac Differential: VW 6spd 1.4TSI Front Wheel Drive (02S) - 10.309.181WK

But I bought it locally through wavetrac so the distributor could speak with my mechanic so we knew it was correct. The wavetrac guy was great to deal with.


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[louis19]

Congrats dude, stoked for ya. I'm sure it'll go to good use in the coming months. Along with everyone else I'm sure, is eager to hear how it all goes. The red devil just became more devil!

[grandturismo]

62s here we come