Pure Motorsport beam strengthening kit

[Ph1 Tom]

I'm getting some AST coilovers soon and with the rear being a full coilover I was considering getting the PMS rear beam kit.

The questions I have are:-

Is it worth it?
Do I need it?

I use the car on track and I'm looking to start competing next year, I won't be racing but I'm going to start hillclimbs and sprints if I can.

Cheers

 

[bloke]

Looking at the beam I'd say yes, especially for a track car. I'm getting the kit for mine and its pretty much a road car. Used the plates they do for the front arms as well the other week, wouldn't like to say for sure if there is much difference though as I changed arb bushes as well.

 

[NorthloopCup]

The pms beam strengthening kit works better than a whiteline arb mate. It also means you can get away with running a slightly softer spring setup at the rear. It helps to stop ludicrous geometry changes when the rears under load as well.
I've not got it fitted on my car, but I intend on doing.

 

[Ph1 Tom]

Cool beans. I'll get the stuff ordered

 

[NorthloopCup]

I'll be adding some cup racer evolution parts to my beam as well.

 

[Ph1 Tom]

What do they comprise of? I was just going to get the PMS stuff and the Powerflex black bushes.

 

[NorthloopCup]

What do they comprise of? I was just going to get the PMS stuff and the Powerflex black bushes.

Nothing spectacular at all mate! Just a bit of additional welding and plating.

 

[Tony Hunter]

Yes it's worth it and yes you will feel the difference. Took the arb off once this was fitted to the race car.

 

[bozothenutter]

are all rear beams the same?
ie can I get another rear beam and fix that up with these plates and such?

 

[Tony Hunter]

Sport ones, yes.

 

[Dan@SJM]

Looking at the beam I'd say yes, especially for a track car. I'm getting the kit for mine and its pretty much a road car. Used the plates they do for the front arms as well the other week, wouldn't like to say for sure if there is much difference though as I changed arb bushes as well.

I personally wouldn't suggest fitting the front wishbone kit. It's a designed fail point in a crash, and in a crash with that fitted instead of it being a wishbone and subframe, it'll end up being a shell.

The cup racers ran full slicks and stock wishbones...

 

[mikekean]

As Dan says wishbone kit is a waste of time, more often than not the standard wishbone takes the sub frame with it when It bends. Its worth while double skinning the underside of the sub frame and stich welding. That way the wishbone will bend like its meant to and in a bad crash the sub frame should still bend.

 

[Carbonraider]

Sport ones, yes.

The 182 cup beam is slightly different it has a thicker torsion bar and extra stiffeners. But other than that I think they are roughly the same.

 

[Carbonraider]

I personally wouldn't suggest fitting the front wishbone kit. It's a designed fail point in a crash, and in a crash with that fitted instead of it being a wishbone and subframe, it'll end up being a shell.

The cup racers ran full slicks and stock wishbones...

The cup racer runs with a harder/solid insert and also different caster angle.

 

[Dan@SJM]

The cup racer runs with a harder/solid insert and also different caster angle.

Yes, but they didn't use strengthening plates is what I was getting at.

 

[MG cup]

^^ Other than the doubler plates where the ball joints bolt to.

Tom at the very least I would box in the rear lower shock mount point as it now has the full weight of the car hanging on a bolt rather than just the shocker.

 

[bloke]

I personally wouldn't suggest fitting the front wishbone kit. It's a designed fail point in a crash, and in a crash with that fitted instead of it being a wishbone and subframe, it'll end up being a shell.

The cup racers ran full slicks and stock wishbones...

that'll be why i thought it didn't look to strong. on the other hand i don't crash so fingers crossed.

 

[Dan@SJM]

They're strong enough. Renault haven't altered the design until the mk3.

I'd sooner just have a wishbone that doesn't flex anyway until a crash.

 

[Tony Hunter]

The 182 cup beam is slightly different it has a thicker torsion bar and extra stiffeners. But other than that I think they are roughly the same.

He just asked if it would fit. But yes, the one on the race car has the thicker torsion bar.

 

[Carbonraider]

He just asked if it would fit. But yes, the one on the race car has the thicker torsion bar.

Yes I understand that tony but the 182 cup road car has a different beam as that's what I have on mine it has additional stiffener brackets and has the thicker torsion bar.

 

[Tony Hunter]

That's the one I've got, and the strengthening kit as well.

 

[Carbonraider]

That's the one I've got, and the strengthening kit as well.

Yeah I can't complain really it's a great setup I also have there bearing kit fitted too, really tightens up the back end.

Although after seeing the comments about the wishbone kit I might change my mind as that is what I have to.

 

[Tony Hunter]

I was advised against fitting the bearing kit along with the strengthening kit, as this led to no give at all. Any contact, and something would bend.

 

[Dan@SJM]

Prime example of what wouldn't happen if you fitted that strengthening kit (to the wishbones)

 

[Carbonraider]

Hmmm I think il remove the strengthening plate but keep the bearings. Will also modify the subframe so there isn't to much strain on the original mounting points. Cup racer subframes don't come round to often :/

 

[pure-motorsport]

Prime example of what wouldn't happen if you fitted that strengthening kit (to the wishbones)

What? The hub wouldn't snap?!!!
The front subframe and wishbones are weak, so for any competition use the stiffer you can make them the better. If you hit a wheel hard enough to bend a wishbone, you've probably bent the subframe whether the stiffening plates are there or not.

 

[VenomUK]

What about running the PMS rear beam kit and ARB or is that overkill?