uprated prop

Post by **pettaw** » 12 Feb 2007 08:09 pm

340GLT wrote:Stock one is ALuminium Andy not Steel!! lol
Cheers Adam

Erm......Just testing.....

Post by **Frits** » 12 Feb 2007 11:03 pm

Could be possibel that I also order one.. If I blow the original prop with my 1.4T. (165 nm) But I could take maybe about a year before it is that far.

Post by **pettaw** » 12 Feb 2007 11:50 pm

Courtesy of Huskyracer, prop made by Reco-Prop. Currently handling over 200 bhp and 230 ft/lbs of torque

Post by **kesk** » 21 Apr 2008 07:04 am

Hi,

My fourth (or was it the third one?? I have stopped counting after two) propshaft is actually dying

. Now I am thinking of trying to build an uprated one.

I have a good driveshaft lying around, and I was thinking of converting it to a propshaft.

Is this a stupid idea? Can a driveshaft and the CV joints (from a volvo 340) take so high rpm?

My plan is to take the flanges (pivots) from a broken propshaft, the flanges (connection of the driveshaft on the wheel-side). To cut a driveshaft in half, and lengthen it with a pipe made of steel. And to weld everything together. And voila, an uprated propshaft

.

Could this work?

EDIT:

some visualisation:

I would try to fit this two flanges together:

This should be possible:

Then I would get this flanges on the gearbox and clutch output shaft:

And finally I would fit in a lengthened driveshaft as the new uprated propshaft:

----
And please excuse my bad English.

Post by **classicswede** » 21 Apr 2008 01:23 pm

The idea of welding on the flanges could work. If going that I would use a prop shaft from a 240 or similar RWD car and use the UJ

Post by **kaos** » 21 Apr 2008 06:22 pm

cheaper option maybe just sort out a spline shaft and a bit of scaffolding pipe. i was considering cutting mine open and just getting some scafold to fit the inside. to strengthen it.

Post by **Bazboy** » 21 Apr 2008 11:13 pm

How do you know its dying? cause it would be great to know what to listen out for, cause when mine went it left me stranded in the middle of no where and the AA took ages to find me. lol

Post by **kesk** » 22 Apr 2008 01:56 am

Bazboy wrote:How do you know its dying? cause it would be great to know what to listen out for, cause when mine went it left me stranded in the middle of no where and the AA took ages to find me. lol

I saw a ring-formed breaking line on the rubber of the prop (on both sides). I look often for them, and I noted this breaking line about a month or two ago. I don't have a good digicam to make a photo of this. But this breaking line is on the same position on the rubber where my last three props got broken.

Now I also have heavy vibrations over 3000 rpm. I am pretty sure it is the prop.

Post by **pistonpen paultje** » 22 Apr 2008 09:58 am

Line out your engine @ first...3 or 4 propshafts with normal usage should not be possible...

Post by **classicswede** » 22 Apr 2008 01:09 pm

What part of the props went? The rubber or the splines on the end?

Post by **Jason B** » 22 Apr 2008 01:10 pm

I would definitely check how you are fitting them and that everything is lined up. I know that they are the weaker parts of the driveline but I haven't heard of someone destroying many under normal usage at standard power.

Post by **kesk** » 22 Apr 2008 01:14 pm

pistonpen paultje wrote:Line out your engine @ first...3 or 4 propshafts with normal usage should not be possible...

That was in 80tkm and 12 years.

She had sometimes to pull weighty trailer. (that was my father).

In the near past I towed off some VWs of my friends to the next garage.

And many curvy mountain roads here in Bosnia where I live. Many "load change", many accelerations and braking (including some unintended drifts). And many bad roads.

I think the engine is in good condition (now 170tkm on the clock), pulls pretty well, runs smooth (a little shaky in the warm-up phase).

Post by **Bazboy** » 22 Apr 2008 01:18 pm

Well i just got out from under mine, and guess what? the props splines have gone and its only being held on by the bolts!!! Dam. guess i better get searching for a new prop.

Post by **kesk** » 22 Apr 2008 01:23 pm

classicswede wrote:What part of the props went? The rubber or the splines on the end?

Was always the rubber.

Had two times problems with loosing some splines (on the clutch output shaft), but that was just after a change of the prop. I think the mechanic did something wrong. I tightened the prop a little and had never problems with that again.

Post by **kesk** » 22 Apr 2008 01:33 pm

Jason B wrote:I would definitely check how you are fitting them and that everything is lined up. I know that they are the weaker parts of the driveline but I haven't heard of someone destroying many under normal usage at standard power.

I had always used props. Not new ones.

I think I do everything correctly. I tighten them just a little stronger, but not to strong (have no torque wrench).