S2 balaner belt/shaft

[SUSIT]

what issue can you get with these?

Belt tension is important I gather, any issues with the shaft itself?


thanks in advance for info


Stephen

 

[Hilux]

Cant help much I`m afraid as the shafts simply rotate in bearings - if the back ones leak they are a PITA I am told and the belt tension and their positions are obviously important
but I`d love to see piccies of your Stratos [8D]

Did you build it?

I really fancy building one.

 

[sawood12]

I've not heard or read anything in terms of problems apart from that as the cars get to the ages they are at now the balance shaft housing gaskets can be quite a common source of oil leaks.

The only other thing i've always advocated is that you change the balance shaft belt at the same time you change the timing belt. They are only about £30 and Porsche never thought of putting a service interval on them, but although a balance shaft belt failure is theoretically benign, it is possible and has been known that once a balance shaft belt fails it can get tangled up in the timing belt and cause a timing belt failure too.

Some people are reportedly running perfectly fine with balance shafts removed altogether - mainly racers to take weight out and friction. this fundamentally feels wrong - just because a few people are getting away with it doesn't mean that it is benign long term.

 

[SUSIT]

Have a look here

http://www.stratossupersite.com/photos/showphoto.php?photo=652&ppuser=90

and this is what its like at present

http://www.stratossupersite.com/photos/showphoto.php?photo=1509&ppuser=90

I did'nt build it originally no, but have totally rebilt it since. was a 2L Beta engine now a modified Alfa V6 with grp A heads and cams plus wolf 3D ignition and fueling the dyno sheet shows 256 bhp and 248 lb ft
Brakes are now 282mm all round with compbrake 4 pots on rear and on the front. Suspension is koni front coilovers and Bilstein struts on the rear. Steering is chevette quick rack mated to a impreza coloum. gearbox is a modified Alfa 164 with lower final drive and LSD. Wheels for forest a 7 X 15 Revolution all round Tarmac 9 inch rears. I have 2 rear clams a Stradale and a square arch group 4.

There are now 3 UK compines doing Stratos kits Hawk Cars ,been around donkeys and produce the closest replica in many ways but a PITA to put together. The glassfibre is not the best fit and needs hours of redoing.
Napier sport produce the Corse I it has a better chassis with independent double wishbones on all 4 corners. mechanicaly much easier to put together. body work still a bit of a faff.
New kid on the block is Listerbell STR Chassis is close to original and the engineering is much improved but the quality of the body is fantastic. should be a straightforward build. Its defo the one i would go for if I was to build a new one.



The reason for my queation re balance shaft is my S2 has been having a new head fitted and the guys doing it say there was no belt on the balancer shaft when they started on it. They have fitted one but it wines badly so they took it off and have left it off. I am not keen on that solution however they have had the car 4 months and i want it back (it is my only daily driver) so will get it back and try sort the belt issue myself. EBC motorsport think it has been over tensioned and dont recommend running without one, mentioned something about the power steering braking.

On reflection i should have takled the job myself but since the D word not got a garage anymore so am bit stuffed.







LSD

ORIGINAL: Hilux

Cant help much I`m afraid as the shafts simply rotate in bearings - if the back ones leak they are a PITA I am told and the belt tension and their positions are obviously important
but I`d love to see piccies of your Stratos [8D]

Did you build it?

I really fancy building one.

 

[SUSIT]

ORIGINAL: sawood12

I've not heard or read anything in terms of problems apart from that as the cars get to the ages they are at now the balance shaft housing gaskets can be quite a common source of oil leaks.

The only other thing i've always advocated is that you change the balance shaft belt at the same time you change the timing belt. They are only about £30 and Porsche never thought of putting a service interval on them, but although a balance shaft belt failure is theoretically benign, it is possible and has been known that once a balance shaft belt fails it can get tangled up in the timing belt and cause a timing belt failure too.

Some people are reportedly running perfectly fine with balance shafts removed altogether - mainly racers to take weight out and friction. this fundamentally feels wrong - just because a few people are getting away with it doesn't mean that it is benign long term.

Scot thanks for the informative reply

Stephen

 

[pauljmcnulty]

what issue can you get with these?

Not many, in my experience. In fact, is there a reason for asking?

This thread, http://www.porscheclubgbforum.com/tm.asp?m=608686, is the only one I can remember recently, and that was just a wrongly-fitted belt. Tension isn't any more critical than any other belt, oil leaks are no worse than plenty of other oil leaks on any other old car. Changing it is, as mentioned, sensible for what it costs, but it's not really something that's come up as an issue on the cars over the years. Plenty of other things need more attention!

 

[SUSIT]

Hi Paul see my post 2 before

thanks

ORIGINAL: pauljmcnulty

what issue can you get with these?

Not many, in my experience. In fact, is there a reason for asking?

This thread, http://www.porscheclubgbforum.com/tm.asp?m=608686, is the only one I can remember recently, and that was just a wrongly-fitted belt. Tension isn't any more critical than any other belt, oil leaks are no worse than plenty of other oil leaks on any other old car. Changing it is, as mentioned, sensible for what it costs, but it's not really something that's come up as an issue on the cars over the years. Plenty of other things need more attention!

 

[rcsalmons]

I think there is more likely to be a problem if you run without one. Increased vibration has been known to cause the oil pick up pipe to fail.

Over tight balance belt will whine.

Rich

 

[Eldavo]

The balance shaft belt is often over tightened, the correct tension is a lot looser than you think!

I have one of the club's belt tensioner tools at the moment so the belt tension is spot on and i still triple checked it as it seemed to loose!