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I delivered a 40kg bag of cement the other day to a mate, and noticed how much better the Wonder Brumby handled with just that amount of weight BEHIND the rear wheels.

Now, I am not short of torque- (she tows 700kgs and the temp needle never moves) so the etxra weight makes no difference to the power or performance.
So I am now making the custom suspension compression system......

THE SACK

Very simply, a heavy canvas envelope with heavy duty stitching and straps to lash it in place.
filled with lead shot. (Shotgun shot, number 6 to be precice)

It may well end up inside my steel rear bumper bar as there is a cavity there.

When I get this droolisious blower hooked up I may well put even more weight in it.

Any opinions or suggestions?

Ahhhh..... the old bag-of-cement-in-the-boot-trick aye.
This one has been around since Christ played halfback for Jerusilum

I do not know about the Brumby but adding weight to the rear of older style race/rally cars to improve the overall front to rear weight split is a well accepted tried and true method for improving handling, the downside is of cource you now have to carry it arround the race cource

If you are going to do this try and make it solid and bolted on to the under carage to keep center of gravity low. I have seen everything from thick scrap plate steel to custom made boxes filled with lead. I would not recomend a sack as the lead shot could move inside it and you would need to keep it in the tray which is higher than you really want it.

Experament a bit first with easilly adjusted weights to find out how much you need/like then go from there.

G'day ToyRX,
I am going to do some experimenting with the load, it's made of my old diving weight vest and is well strapped down (With seat belt webbing).
The shotgun shot moulds to the ridges in the tray and doesn't rattle or bounce.
I will be mounting it up under the rear bar at some stage.
I figure I have to counter-act the extra weight of the EJ22 over the EA81 it was designed for.
I wonder what the difference would be?
The battery going under my seat will help a little I suppose...
Then again should I just weld a thick steel lining in my existing rear bar?
Hmmm.

my vote is for making some stupidly thick steel plate bash plates for the rear diff...
should add weight and keep it as low as possible

and after driving the Twagon around in RWD with no weight in the back and not being able to get outta a flat paddock coz it was wet, i know that some weight back there has got to help a bit

tasbrat wrote:the etxra weight makes no difference to the power or performance. Any opinions or suggestions?

The 1st part is technically incorrect... the additional weight WILL change the power/performance… basic physics says that it HAS to!!!

As for suggestions…you could always experiment with the extra weight in the rear by bolting in something like 1 of those cheep trunks/toolbox/foot locker what ever you wana call em and then securing it to the rear. That way you could change the weights around and see what “balance” you like. Then maybe if you get the desired “balance” but that was taking up boot/tray space then look at relocating under the body around the rear, maybe behind the diff. Just a thought.

Oh, you could also look at adjusting tyre preasures (diff front and rear)... depending on the desired result and the driving you are doing.

Jaffa wrote:

tasbrat wrote:the etxra weight makes no difference to the power or performance. Any opinions or suggestions?

The 1st part is technically incorrect... the additional weight WILL change the power/performance… basic physics says that it HAS to!!!

Ok fair enough Jaffa, But basic seat of my pants performance rating tells me that it still idles up hills in 5th at the same revs and speed.
The donk lived its first 90,000ks in a Lib wagon, 40kgs extra in a Brumby
which weight 4/5 of 5/8 of F... All.

IT DOESN"T FEEL IT. but the arse scootches down nicely!