Author Topic: reenforment of the rear beam.  (Read 3245 times)

Offline martijnt

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reenforment of the rear beam.
« on: March 10, 2015, 02:47:31 am »
g40 rear beam.
2 pieces of tubular welded to the beam and a triangular piece of steel welded in between.
on top is a rear arb of a astra gte16v


maybe this is old news for you guys, but i have never seen it before, thought i share it with you lot.
because i learn alot from these english forums, thought i try to return the favour

Offline Yoof

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Re: reenforment of the rear beam.
« Reply #1 on: March 10, 2015, 10:10:12 am »
Hi !

Thanks for sharing, it's an interesting take on what is fairly common in the VW track/circuit cars, popular with the Golf lads, ala Reeves Mk1:



I'm unsure what cornering force is required to alter the geometry of the rear wheels though, go-pro and a trackday required!

Offline martijnt

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Re: reenforment of the rear beam.
« Reply #2 on: March 10, 2015, 10:45:56 am »
i read a piece on clubpolo about skoda felicia arbs being mounted to the rear beam (mikeymk)
He took two of them and sandwiched them up and under the beam and bolted them on.
Look how stiff the rear end became.


I wonder how it will look if you put a standard polo with one of of its front wheels put on a engine block and than a look at the rear :)

Offline hayesey

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Re: reenforment of the rear beam.
« Reply #3 on: March 10, 2015, 10:53:34 am »
not really sure what that picture is trying to show, any polo will have the rear wheel in the air if it's jacked up that much :)

Offline Yoof

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Re: reenforment of the rear beam.
« Reply #4 on: March 10, 2015, 11:15:13 am »
Indeed - that's a fairly worthless test.

I can jack my car on the subframe, 3 wheels come off the ground, doesn't make it a Ferrari... unfortunately!


Offline martijnt

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Re: reenforment of the rear beam.
« Reply #5 on: March 10, 2015, 12:58:11 pm »
What matters to me, is that the handling improved dramaticly.
The rear beam became so stiff, it was able to lift its inside wheel in turns, taken hard.
I thought if you lift a polo like that, that the rear beam will flex a bit, which this beam doesnt really do anymore.

Offline hayesey

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Re: reenforment of the rear beam.
« Reply #6 on: March 10, 2015, 01:38:58 pm »
the weight of the wheel alone isn't nearly enough to make the beam flex.

I understand what you are saying though, I just think that picture is daft :)

Offline Yoof

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Re: reenforment of the rear beam.
« Reply #7 on: March 10, 2015, 09:08:10 pm »
What matters to me, is that the handling improved dramaticly.
The rear beam became so stiff, it was able to lift its inside wheel in turns, taken hard.
I thought if you lift a polo like that, that the rear beam will flex a bit, which this beam doesnt really do anymore.

A standard rear beam will lift a wheel mid corner  ;) :




Offline Robin

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Re: reenforment of the rear beam.
« Reply #8 on: March 10, 2015, 10:52:07 pm »

Offline Matty!

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Re: reenforment of the rear beam.
« Reply #9 on: May 12, 2015, 06:33:12 am »
I've seen that second setup on a MK4 golf touring car.

Tempted to go for it on mine, anyone done it before with results?

Offline Yoof

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Re: reenforment of the rear beam.
« Reply #10 on: May 12, 2015, 05:31:51 pm »
I've seen that second setup on a MK4 golf touring car.

Tempted to go for it on mine, anyone done it before with results?

Matt- Needs an exhaust re-route really. I've got a little rig to try and quantify toe change during cornering. If it does, then I may try this.

I think you'd need to be on slicks to be flexing the beam a significant amount though (I may be wrong, as I have no data)


Offline Matty!

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Re: reenforment of the rear beam.
« Reply #11 on: May 12, 2015, 06:06:11 pm »
Balls, totally forgot about that!


Also considering this, as I have to renew my brake lines and add nylon bushes so may aswell do it all at once.