Stretched my modded vRS, (stage 2 or thereabouts) at Brands on Wednesday.

 

All was well and my worry of the standard clutch @ 77K (quite probably original) was unfounded.

 

Out today and when just warm, clutch seemed to slip and gain about 5-700 revs when accelerating in 4th. Hmm. Repeated when all was properly hot and all was well.

 

I believe that the additional torque, (which seems quite a lot) is going to overcome the clutch.

 

Another TD at Coombe later this month so need to sort this.

 

Apparently the way to go is a G60 solid fly and some sort of competition clutch.

 

Any recommendations?

Anyone have a fly sitting unused in their shed.....

 

I look forward to advise..........

I'm amazed if the original clutch or not uprated even lasted Stage 2, even a Stage 1 with a Shark remap from Ben killed mine a few years back. Now I run a Darkside Billet G60/VR6 setup and Stage 2.

Some details here:

 

 Thanks for that. Just had a read of a breakfast.

 

I shall make a few phone calls on Tuesday, see what is available and check out the prices. 

 

 Not sure what hp I am running at the moment. My local Rolling Road seems to be shut at the moment so will check it out when he is open. It certainly seems powerful compared to a standard car.  Was hitting an indicated 110 at the end of the main straight at brands which by comparison to about 115+ with my old 400 hp TVR compares very favourably. 

 

12 hours ago, phazed said:

I shall make a few phone calls on Tuesday, see what is available and check out the prices. 

 

I'll be interested to see what you come up with.  Mine's stage 2 and I have no idea what clutch is in it.  I've looked through the history file but there's nothing to say it's anything other than a standard setup. 

I've got a graph from R Tech to say it made 235bhp and 301lbft of torque on their rolling road.  If it is a standard clutch then it's doing really well as it handles the torque without any issues.  As you have said, it's the inner wheel spinning up that needs sorting so I have been thinking about an LSD.  

Might one suggest that if a PD150 clutch will fit it's designed to handle more torque.

PD150?

50 minutes ago, phazed said:

PD150?

It's a Seat tune.

Ah.

Darkside have replied. More than I thought.......

 

https://www.darksidedevelopments.co.uk/products/darkside-g60-billet-flywheel-with-sachs-sre-performance-clutch-kit-5-speed-02j-02a-02r.html

 

They give a choice of 7kg or 10kg flywheels. What is best and for what purpose?

 

I had a very light fly on my old 5.5 TVR which spun up very quickly but that had a huge crank that added to the mass.

 

If I were to go to a 6 speed box conversion, prices go up......

 

https://www.darksidedevelopments.co.uk/products/darkside-billet-single-mass-flywheel-smf-clutch-kit-for-vw-02m-6-speed.html

 

Also a choice of friction plates. I was never impressed with the paddle clutch I had in the TVR. I changed it after less than 1,000 miles as it was juddery and a bit off/on.

 

Decisions, decisions........

As in their notes. The lighter requires more engine braking which is ideal for track use. If it’s your daily for the road I’d stick to the standard weight. I got the 10KG in mine.

 

And, you really don’t need to go for a 6 speed conversion. There’s very little in it and our boxes have extremely long ratios. 6th gears just mean more changing. Don’t get me wrong, a lot have done it but I can’t see much benefit personally.

 

Plenty of info on here about such conversions, use the search function or Google. 👍🏻

I tend to agree with you.

 

Ideal situation I believe is the five-speed box with a new high capacity clutch and a limited slip differential.

11 hours ago, phazed said:

If I were to go to a 6 speed box conversion

Does the present engine tune rev out in 5th? There's no point in fitting a 6 speed unless you're revving out in 5th.

No idea and I’m not likely to know!

 

Not looking for economy.

 

 

9 hours ago, phazed said:

No idea and I’m not likely to know!

 

Not looking for economy.

 

 

And? My point was that the only time there's any point to fitting a 6 speed transmission over a 5 is if you regularly hit the rev limiter in 5th.

I quite agree. If sixth gear is only an overdrive then it is a pointless mod.

 

my theory is that with the stage 2 remap, the engine is so torquey it isn’t necessary to keep it buzzing at high revs with a closer ratio gearbox and in fact quite probably the five speed box is better

3 hours ago, KenONeill said:

And? My point was that the only time there's any point to fitting a 6 speed transmission over a 5 is if you regularly hit the rev limiter in 5th.

 

Not so, were that the case race cars would still have 2 or 3 speed gearboxes.

 

You select the gear ratios and number thereof according to the power developed at the new RPM when upshifting each gear, poor description and it could be with a wider torque band that the benefits from an additional gear might be marginal.

 

If the vehicle runs goes beyond the max power RPM on the fastest straight its the final drive ratio (or tyre size) that is changed.

 

The advice you gave above is relevant for a road car but not for a race car.

@J.R. Your argument works for a full race car in a class where you can change tyre size, gear ratio(s) and/or CWP. I don't believe this is the case with an Octavia, so the controlling question on whether or not you spend out on a 6-speed gearbox is whether or not the car has sufficient power to rev out in 5th. There are some big power 1.8t engines that probably do rev out in 5th, but the 6 speed box adds a longer 6th gear to the 5 speed, rather than closing up the intermediate gears.

I had 5 speed boxes on my last two 1.9 TDi Skodas and a 6 speed on this 2.0 CR one, I dont agree that the 6 speed is a 5 speed with a longer top gear, granted top gear with the diff ratio is taller but the gaps between the intermediate gears are closer as first gear remains pretty much the same.

 

I dont like having 6 gears on a turbo-diesel engined vehicle but when mine was an asthmatic 108hp it really needed them, it was very nippy in the lower intermediate gears but was terrible for mid range overtaking, in fact it felt so nippy that you would misjudge the over 50mph overtaking distance.

 

Now with it remapped I would really prefer a 5 speed box for the road, the track is a different story.

 

None of the TDi vehicles with standard gearing is ever going to run out of revs in top gear no matter how much they are boosted and thats on the road, on the track the Nurburgring aside they would not get anywhere near it.

 

Ken, the OP was talking about track days and not racing within a restricted formula.

Edited 5 May, 20215 yr by J.R.

Yep.

 

Mostly TD's.