Prop Let Go At 90 !

[Guest NantLladron]

The prop let go on Sunday whilst going for a blast , certainly focusess your attention , are the propshafts on a s7 custom made or donor sourced? does anyone know?

[Guest carl leonard]

Custom made.

 

You were very lucky nothing serious happened to you.

 

Try Bailey Morris (specialists) for a replacement.

 

Carl.

[Guest NantLladron]

Thanks Carl , yes luckily it let go at the diff end so nothing to dig in the ground just a few dints in the tunnel and ripped the brake lines out , will get it over the pit at the weekend and have a proper look

[Guest big kev]

Of course you would have been fine having a moment while doing 90 on a track day with all the emergency services on hand wink wink !!!!!!!

[Snapperpaul]

On my S3 I have added 3mm steel plate either side of the forward UJ.

My prop is a Dunnings and Fairbanks.

[Grim]

can you post up some pics? i think we'd all be interested to know what bit failed. I do metallurgical failure analysis as a day job so i'm even more interested!

[Guest NantLladron]

^{Yes i will post some pictures at the weekend ,from initial view it looks like the rear UJ thats gone as half is still bolted to the diff but not sure whats left of the prop}

[Guest robinj66]

Mine went on the way back from the SVA

It was the forward UJ on mine. Got a new one and put it all back together and it seems fine now

[Guest AdrianH]

Is it a 2 inch tube or bigger prop shaft and what is the engine and expected BHP?

 

I know that one can just have a fatigue failure of course, but wondering on the rating of the prop and parts. Reason is I was asked what my engine was and it's power before I was supplied up to 150 bhp and I got the standard 2 inch as you see on sierra, over that the prop was approx 3 inch diameter and a lot heavier UJ's.

 

Glad no personal damage done, apart from perhaps a change in attire!

 

Adrian

[Dave R]

been thinking that this winters mods should include a prop catcher before i read this.................................

[Guest carl leonard]

There's no substitute for getting proper prop shaft made by a specialist supplier which is up to the job. Considering a lot of kit cars start of with 'mild' BHP and then get modified after IVA (more speed), its worth the investment from the start.

 

My four pence worth

carl.

[Andy Spencer]

There's no substitute for getting proper prop shaft made by a specialist supplier which is up to the job. Considering a lot of kit cars start of with 'mild' BHP and then get modified after IVA (more speed), its worth the investment from the start.

 

My four pence worth

carl.

Agree totally. I've still added some strength around the tunnel around the UJ's, and made crude angle deflectors away from fuel line at UJ's as well. Although I know my prop is a good one (for those that don't know I have Carl's old 2B), I still have worries about the fuel lines down the tunnel though and what would happen if a failure occurred (this isn't just about my car must be the same for may). With injection pump, inevitably failed fuel line, resultant high fuel flow rate and lots of sparks from prop bits = fireball. Must re prioritise the job list to re route fuel lines away from tunnel.............

[Guest NantLladron]

well guys got home to get the car up in the air and have a proper look .........ouch ! back UJ has broke , prop has flailed around took out the wiring loom , brake lines , handbrake cable & fuel lines..........the many comment above luck and concerns about all these things running down the tunnel are very true .......

 

in the pictures you can see how the handbrake cables have kept the prob up ....prop itself looks ok

[Guest Ian & Carole]

Looks like that U/J has never seen grease since the day it was put together.

 

I would have thought that it must have been making strange noises for a while.

[Guest NantLladron]

Agree on the dry bit , prob should have gone over it when i bought it ! strangley no noise or vibration up to the point of the big bang