Supercharger - Engines Forum - Peugeot 306 GTi-6 & Rallye Owners Club

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Subject: Supercharger

mechanical_repairs

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Location: leicester

Registered: 10 Jan 2005

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Post #1

I have a customers car in the garage and the charger seems to have failed (rotrex), the customer has had a good four years with the conversion and looked after it very well, believe it or not the chap is in his 60s Thumbs up

, he complained of loss of power and a strange noise.

I removed the charger from the car today and as its faulty I thought I would strip it down and see what's what, has anyone done this before? Just searched the net quickly and it seems that there are very few suppliers for spare parts if any.

I buy all my chargers etc from tts and obviously have no issues what so ever with them I am just intrigued on how it all works and whether I could get repair parts to fix it myself, it seems the customer would be inclined to put the car back to standard rather than spends hundreds of £s on a new unit so I have an ideal unit to strip.

I have worked out the shaft has snapped and the pulley obviously rotates but the propeller not so.

Just wondered if any of you out there have had a bash or know anyone who has?

Thanks, Carl

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Posted 12th Mar 2013 at 19:17

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stan_306gti6 Forum Admin

Location: Kent

Registered: 18 Jan 2004

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Post #2

Moved to Engines. Smile

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Posted 12th Mar 2013 at 19:18

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mechanical_repairs

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Post #3

stan_306gti6 wrote:

Moved to Engines. Smile

You got nothing better to do stan LOL

Carl

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Posted 12th Mar 2013 at 19:19

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arigti6

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Location: Wiltshire

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Post #4

60yr old SC owner Hyper

That is what I call living for the 306 Smoke

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Posted 12th Mar 2013 at 19:36

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stan_306gti6 Forum Admin

Location: Kent

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Post #5

mechanical_repairs wrote:

stan_306gti6 wrote:

Moved to Engines. Smile

You got nothing better to do stan LOL

Carl

No mate... Laugh

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Posted 12th Mar 2013 at 19:56

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jamiek_uk2000

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Post #6

I've always been under the impression that they aren't something to be touched unless your into precision engineering due to the tolerances involved. If I remember correctly the impeller spins at upto 50,000 RPM and I imagine at those speeds anything could throw it off.

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Posted 12th Mar 2013 at 19:58

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mechanical_repairs

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Post #7

jamiek_uk2000 wrote:

120,000 so I have read. I am just intrigued to be honest.

Carl

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Posted 12th Mar 2013 at 19:59

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prism7guy

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Location: DoncastAAAAARGH

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Post #8

I havent had one apart myself but i'm sure if you took it apart and found whats broken and took that to a local precision machining shop they could replicate it for you, or at least have a go.

I've not seen inside one but i'm imagining it might be like a planetary gear box but using rollers instead of gears, so i'd guess the shafts are ground for a good finish.

I could just be talking bulls**t though. LOL

If you do take it apart, pictures would be interesting to see. Yes

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Posted 12th Mar 2013 at 20:14

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jamiek_uk2000

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Post #9

I think that it would be worth it getting professionally rebuilt, I would love to pull one apart but that's as far as you can get I think. It won't go back together, or if it does then I'm not sure how long it will last. If you get it rebuilt, at least it will be worth something

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306 GTi 6 Diablo - Being resurrected! Project Thread

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Posted 12th Mar 2013 at 20:16

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mechanical_repairs

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Post #10

Well I decided to take it apart and just see what's what, it's very clever in how it works but in another way it's very basic.

I removed the charger from the car obviously, I then separated the casing, I was correct in the fact that the shaft had snapped-

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Posted 12th Mar 2013 at 20:18

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jamiek_uk2000

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Post #11

Get some photos up, I'm intrigued now. I love seeing how things work, just they don't when I normally finish with them Smile

________________________________________

205 GTi Red - G939 RTU - Died!
306 GTi 6 Diablo - Being resurrected! Project Thread

Looking for:
VTS P1 Rack
PR1.2 16"

Posted 12th Mar 2013 at 20:19

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mechanical_repairs

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Post #12

jamiek_uk2000 wrote:

Get some photos up, I'm intrigued now. I love seeing how things work, just they don't when I normally finish with them Smile

Hang on hang on, my dinner turned up.

I then removed the aux belt pulley, and was treated with a bearing, I removed the plastic cover which left me this, upon first look I thought the bearings where knackered but its a kind of bearing used-

I then removed the bearing with a bearing puller-

I am then left with the shaft which has the aux belt pulley bolted to it-

With the shaft now removed I flipped what's left of the charger over and this reveals the bearings, there is three in total which have the shaft secured in the middle of them which gives it the rotation.

Well here we can see the shaft has picked up against the bearings and marked the shaft, I believe this has then caused a sudden vibration/seizing and It then has sheared.

The broken piece-

A close up look of the shaft reveals some damage-

Well that's your lot folks, lovely bit of engineering and a very simple machine, it's a amazing what this little charger can do.

Carl

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Posted 12th Mar 2013 at 20:35

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ravemercer

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Location: kent

Registered: 18 Jan 2009

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Post #13

Rotrex have got a technical book Clicky Its a pdf. They have a claim form could be worth a shot.

Posted 12th Mar 2013 at 21:10

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aaron6

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Post #14

Go to a toolroom and get one made. It will need shallow casing and grinding but will be a piece of p**s to do. Wink

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Posted 12th Mar 2013 at 21:11

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coskev

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Post #15

Interesting Thumbs up

Great pics Cool

Anyone like to explain how it creates boost and what the three sets of little bearings do? Big grin

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Posted 12th Mar 2013 at 21:27

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welshpug!

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Location: Bigend, Wales.

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Post #16

oil cooler issues?

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Posted 12th Mar 2013 at 21:39

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phillipm

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Post #17

coskev wrote:

Interesting Thumbs up

Great pics Cool

Anyone like to explain how it creates boost and what the three sets of little bearings do? Big grin

That's the drive unit, it's why you need proper traction fluid instead of cheap oil and why it needs to be kept cool!

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Posted 12th Mar 2013 at 21:41

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jamiek_uk2000

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Post #18

It's the same as a turbo with this style of S/C the belt spins a shaft which in turn spins gears which take the RPM of the engine upto what Carl thinks maybe upto 120,000 RPM. This spins the impeller which sucks air in and compresses it. More air, more fuel, more BHP

________________________________________

205 GTi Red - G939 RTU - Died!
306 GTi 6 Diablo - Being resurrected! Project Thread

Looking for:
VTS P1 Rack
PR1.2 16"

Posted 12th Mar 2013 at 21:46

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coskev

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Post #19

phillipm wrote:

coskev wrote:

Interesting Thumbs up

Great pics Cool

Anyone like to explain how it creates boost and what the three sets of little bearings do? Big grin

That's the drive unit, it's why you need proper traction fluid instead of cheap oil and why it needs to be kept cool!

Ah right

Care to explain how it creates boost,and why/what are the three sets of bearings doing?

Never looked at a supercharger

understand how a turbo works cause I've had turbos Thumbs up

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Mac1 ZR R1 kit car build in progress.

Posted 12th Mar 2013 at 21:47

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welshpug!

Capt Pedantic

Location: Bigend, Wales.

Registered: 27 Mar 2007

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Post #20

They gear the drive up without having teeth, the aux belt obviously isn't spinning that pulley at 100k rpm.

its the simplest variant of a supercharger, just a gearup mechanism and a turbo alike compressor wheel.

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Posted 12th Mar 2013 at 21:49

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coskev

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Location: Oswestry

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Post #21

jamiek_uk2000 wrote:

No gears in a turbo! LOL

A turbo is simple,one shaft through the centre of turbo,with wheels on each end.

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Mac1 ZR R1 kit car build in progress.

Posted 12th Mar 2013 at 21:51

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phillipm

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Post #22

It's just to gear up the shaft speed. But with no gears Big grin

It's more effiecient drive but very tempermental when it comes to fluids and traction.

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Posted 12th Mar 2013 at 21:53

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davedgti6

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Location: whiston, prescot

Registered: 28 May 2006

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Post #23

There is a company in the States that claims to repair Rotrex superchargers or supply spare parts if needed, dont know if they would do overseas customers though, Dunno

http://www.superchargerrebuild.com/?page_id=69

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Posted 12th Mar 2013 at 21:57

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smegal

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Location: Leeds

Registered: 26 Dec 2005

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Post #24

Someone on here linked to a place in the US that had some Rotrex spares.

LOL beaten to it.

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Posted 12th Mar 2013 at 21:57

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jamiek_uk2000

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Location: Llanelli

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Post #25

Saying gear to someone rather than trying to explain how a planetary drive system to someone seemed a much easier option! LOL

________________________________________

205 GTi Red - G939 RTU - Died!
306 GTi 6 Diablo - Being resurrected! Project Thread

Looking for:
VTS P1 Rack
PR1.2 16"

Posted 12th Mar 2013 at 21:58

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