The results are in: S6 reliability

[delamars]

J_S_G said:

Here's a new stat for everyone: Only taking into account engines upto Dec-2001, 56 rebuilds, 23 no rebuilds. 67%.

That's more like the kind of Stat I was thinking this would throw up. Less an 'All Sp6 Engines are cr@p' and more an 'If you got an early one and you haven't had it rebuilt then you most probably will need to'.

Sorry if my earlier post wrankled JSG. This was a good piece of work. Shame we couldn't get a bigger population to work on

[daftlad]

Whilst I acknowledge there was a fault of the earlier engines, I think that this kind of pole will only ever distort the actual situation.

Certainly of 4000 ish engines 1600 have not been rebuilt.

Must be careful with statistics - something about damed lies?

[plotloss]

I would suggest that there are rather less Tamoras than has been suggested.

More like 100 - 150 at the outside.

[J_S_G]

MEMSDesign said:

M@H said: several people said: Another useful graph would show ...XYZ It might be best to dish out your raw Excel data or you're going to get run ragged here I reckon The raw data is available to anyone who can be bothered to make the effort to read the threads. If anyone wants to take issue with the analysis, why don't they do their own, and post the results here?

As soon as I've put everything into the spreadsheet (reason for failure, etc.) I'll make the Excel file available for download. No problems there.

[GCerbera]

By the way, JS YHM.

[bogie]

At least weve got *some* stats now

Personally I think the later cars have got better...but the problems are still there..just less % - I now 3 owners (2 Tuscan, 1 Tamora) that havnt posted on here (not IT literate!) all post 2003 cars, 1 Tuscan with valve wear at 20K, the other with followers at 9K, the Tamora - new engine (eek!) at 7K on a 9 month old car ...Im thinking that the story will change a little in a year or 2...we will have the 2002/3 owners that have done some miles that currently say 'fine - no probs' back with 'oh dear got the follower issue etc" and then the 2004/5 owners saying that the problems fixed and they havnt had any probs in the 5K miles theyve driven

I seriously hope our new Russian friend sorts something out with this engine - according to Evo hes said that the Sagaris cant go out without another 50K test miles under its belt...that will be interesting.

If they want to go into the USA they need an engine that can pass 120K miles without a cambelt/oil change I think ! ...bit of work to be done first

[HarryW]

donatien said:

......Luckily we are getting it done under warranty. Ben Samuelson finally authorised it - he's now in charge of warranties (don't ask!) ......

Now thats one of the first outward sign of the 'new' mangement structure at the factory. Is it a case of reap what you sow .
Always thought BS, with the right backing, would be the first to buy out PW.

Harry

[jimmyt]

An engineer on the TVR stand at Brum this year told me there'd had very little / almost no problems with the 3.6 S6 versus the 4.0 litre.

Is this reflected in the stats? I'm not totally convinced by what he said but it does seem that reliability is on the up from the more recent engines (now the development on the public has been done).

Would be good to see a 3.6 litre graph and a 4.0 litre graph. Perhaps I'll have a go when the data's available.

And well done JSG, good work!

[J_S_G]

daftlad said:

Whilst I acknowledge there was a fault of the earlier engines, I think that this kind of pole will only ever distort the actual situation. Certainly of 4000 ish engines 1600 have not been rebuilt. Must be careful with statistics - something about damed lies?

The situation remains the same. All we've done is add a bit of information to what was spurious guesswork before. Can only help, however little. But yes, stats can be interpreted any way you like.

As for rebuilds, who knows... You could do a bit of guesswork (and this is PURE guesswork)...

1600 = 400 at TVR Power, 1200 at Blackpool.

2 days labour for a rebuild = 800 days labour at Power -> 1 guy full time for 3 years. Blackpool -> 2400 days labour = 3 guys full time over the last 3 years. Technically feasible? I'm sure. Accurate? No clue.

We can't go saying "they must have only had X go wrong overall"... You can only extrapolate from the data that's available, not work back from what you think sounds right.

Ted - get some more S6 owners to sign up quick sharp so we can get some better stats!!!

[J_S_G]

joospeed said:

LOL.. when the next person phones me and asks why i don't work on SP6 engined cars (engine related work anyway) .. I'll show them this set of figures, should make them realise! good work JSG .. frightening set of numbers ..

Ah, Joolz, that reminds me - I think I need to pop up to see you with the Tusc, actually - having sorted everything else out (tyres, tracking, etc.) I think I might need some softer springs on the car.

Promise I won't make you look at the engine

[jimmyt]

J_S_G said:

Here's a new stat for everyone: Only taking into account engines upto Dec-2001, 56 rebuilds, 23 no rebuilds. 67%.

How about:

Only taking into account engines built from Jul-2002, 6 rebuilds, 55 no rebuilds. <10%

I don't think anyone can argue that that's not encouraging especially as some of those cars have plenty of miles on? Agreed 10% is still too high though.