[Simbl]

Originally Posted by The Nightman

Cool idea - would love to see photos

I’ll be fitting the arb bushes sompoint this month so I’ll take some photos.
Incidentally I was looking at another thread and someone had welded tabs onto the standard arb to make it adjustable. Not sure how that went.

[Simbl]

Originally Posted by tylerhart_21

Instead of doing it on the rear would it be better to do it on the front if you don’t have an lsd. As well with it having a different hole on the bar that would mean the suspension is preloaded and would feel different but not act different. I could be wrong on this not familiar with the subject.

What’s an LSD got to do with it. It’s really easy to fit a different bars on the front there are three different stiffness m3 bars to choose from none of which change the preload. The problem with the rear is it requires the subframe to be dropped to get a new bar in. However I think a stiffer bar is probably too stiff on stock springs.

I’m not adjusting preload I’m adjusting the leverage of the bar/stiffness. Even with the modifications I have done of about 2cm the bar is under no preload.

Preload load is done by adjust the length the drop links and is used for different reason it helps to adjust corner balancing and is often adjusted to make a car stay straight when launching.

There are some threads saying you need an lsd if you fit a stiffer ARB but it’s not necessarily true. There are a plenty more people who have fitted front and rear kits and have no complaints.

[The Nightman]

Originally Posted by Simbl

I’ll be fitting the arb bushes sompoint this month so I’ll take some photos.
Incidentally I was looking at another thread and someone had welded tabs onto the standard arb to make it adjustable. Not sure how that went.

Thanks. I'm assuming you drilled a hole closer to the bar, like so: https://www.evolutionm.net/forums/ev...ml#post7598925

How difficult was it to drill the additional hole?

For what it's worth, I also upgraded the rear sway bar bushings to polyurethane. A chore to fit but there was a noticeable improvement.

[Simbl]

Originally Posted by The Nightman

Thanks. I'm assuming you drilled a hole closer to the bar, like so: https://www.evolutionm.net/forums/ev...ml#post7598925

How difficult was it to drill the additional hole?

For what it's worth, I also upgraded the rear sway bar bushings to polyurethane. A chore to fit but there was a noticeable improvement.

That’s good to hear about the bushes.

Yes closer to shorten the leverage on the bar. It was a super easy job. I have some very high quality drill bits that when through like butter on a basic cordless drill. I drilled a pilot first and use a g clamp to keep it in place. I use lots of oil and flatened the mating surface with a grinder so the bolts sat flat. I sprayed with some primer and then chassis black before assembling. The paint hasn’t faired well so I have coated it in waxoyl.

[Simbl]

E93 vertical braces are on, I also made the diy subframe braces. Car fills very solid and a bit more direct. It has seemed to make about the same amount of difference as adding front strut bar. And so far it appear nvh has been reduced a little.

I also added polyurethane rear arb bushes and with the additional DIY ARB mounting holes to make the rear sway bar stiffer it’s just about right. The best bit is the car corners more neutrally and I get less under steer mid corner.

[Simbl]

Haven driven with the e93 front braces and diy subframe braces I can say that it make the front substantially more solid than a strut brace. Steering is more direct, nvh from m3 arms has been reduced. Suspension seems to be working to absorbs bumps as the chassis is twisting less.

[The Nightman]

Great stuff. I really wish the E90 had the mounting points for the E92/E93 front bracing.

Somewhat related but I was under a Merc C43 recently and couldn't help but admire its subframe bracing:



Maybe my DIY subframe braces can be modified into an X instead?

[Simbl]

Originally Posted by The Nightman

Great stuff. I really wish the E90 had the mounting points for the E92/E93 front bracing.

Somewhat related but I was under a Merc C43 recently and couldn't help but admire its subframe bracing:



Maybe my DIY subframe braces can be modified into an X instead?

I tried to do an x but I have the EPS motor in the way. An x would be a far better option which I think you may be able to do with hydraulic steering rack. When you look at oem bracing most manufacturers do an x pattern or a metal plate like on the m3.

I still may try doing an Aluminium plate at some point but it is just finding a reasonably priced supplier. With some dimpling it will be much stiffer than bars.