Rear bump stops (2wd to 4wd conversion) Stinky?

Phizinza · Post by **Phizinza** » Wed Dec 24, 2008 7:30 am

Ok, so I have no rear bump stops on my 83 sedan. Kinda want them. But the metal where they normally go looks a little underrated for bump stops. Just wondering what people have done with this? I know Stinky converted a sedan like mine to 4wd, did you do anything?

steptoe · Post by **steptoe** » Fri Dec 26, 2008 9:59 am

If it helps Brumby bump stop clearance is just 20mm at factory set height, with lowered standards allowed to 2/3 of that with I think 75mm total height of rubber bump stop itself

Phizinza · Post by **Phizinza** » Fri Dec 26, 2008 1:52 pm

More concerned on where to put the bump stops then what size or when they are used. I don't like the feel when your shocker bottoms out when you have no bump stops so I'd like some.

Cheers anyhow mate.

steptoe · Post by **steptoe** » Sat Dec 27, 2008 12:41 pm

The specs, if correct is what a nasty pink slipper is gonna look for or a blue slipper if you attract a defect - you need pics I spose now?

Phizinza · Post by **Phizinza** » Sat Dec 27, 2008 3:19 pm

Mate, I have a 2wd sedan, it came with no bump stops, I have a 4wd rear end in it. I like bump stops, and I want bump stops. I just want to know how people with 2wd convertered 4wd subie have mounted the bump stops. I am really not phased at all with the legal side of anything. I'll just be a good road rules abiding driver and not get looked at like I have always done.

discopotato03 · Post by **discopotato03** » Sat Dec 27, 2008 5:16 pm

What you can do is fit bump rubbers over the damper (shock if you like) shafts so that it bottoms on the rubber not the shock foot .

A .

Phizinza · Post by **Phizinza** » Sat Dec 27, 2008 5:53 pm

I did think of that, but a little concerned the shockers mount won't hold up... I guess I'm a little rough with subies.

Although I'm not going to do this with my new one.

discopotato03 · Post by **discopotato03** » Sun Dec 28, 2008 1:16 pm

The suspension locating points are designed by the factory to support the whole rear of the car , with 4WD sedans thats all there is .

A .

Phizinza · Post by **Phizinza** » Sun Dec 28, 2008 1:20 pm

Its an MY, has torsion bar suspension. Which means the only force on the mounts the shockers bolt to is pressure from the shockers dampening. The spring is in the torsion bar and that takes all the weight.

discopotato03 · Post by **discopotato03** » Mon Dec 29, 2008 8:24 am

Fair enough , for me the Subaru world starts with L series !

I'm not too familiar with MY's but a mate of mine has a Brumby so I'll stick my head under that later and have a look .
My 86 RX-T doesn't have them either and from memory L wagons have the rubber on the body and a platform welded to the semi trailing arm that it strikes if the suspension rises high enough .

If the MY uses a similar system you could possibly rat up a pair of wagon arms (assumes they are dimensionally the same) and change them over to get half way there .
Often manufacturers have extra holes/captive nuts on body shells and your MY sedan may even have them . If not you may be able to fit your own and a bit of plating in the general area to spread the load .

I have some pics somewhere of an MY sedan rally car with Proflex dampers though I'm pretty sure they are coil overs like L's have but with real small diameter springs .

Back later cheers A .

discopotato03 · Post by **discopotato03** » Mon Dec 29, 2008 8:31 pm

I had a sticky at Steves Brumby and yes it's semi trailing arms have platforms sort of like a three sided channel welded on top of them .
You could just about make them yourself and get them welded on as they are no where close to the bearing tunnel and it would be quicker and simpler than changing arms .

The sort of egg shaped rubber is fixed upside down to the body so I'd be looking to see what your MY sedan has in that area so you can hang these in that area .

Cheers A .

AndrewT · Post by **AndrewT** » Mon Dec 29, 2008 9:32 pm

Phizinza wrote:....the metal where they normally go looks a little underrated...

I think he's done this already.

I'm betting most people have just left it and taken their chances but there must be a way to beef that area up with some bracketing of some sort.

Out of interest my RX turbo L series also has no bump stops at all, despite being a 4x4 L series. My Touring Wagon does have them.

Phizinza · Post by **Phizinza** » Mon Dec 29, 2008 9:38 pm

AndrewT wrote:I think he's done this already.

You are Correct, although I didn't "do" it, I just used a 4wd wagon torsion bar (because 2wd ones aren't adjustable).

Its just the body that I'm concerned about. If I stick a bump stop on there I'd bet money the first bump they get it would just push the body outta the way. I'll have to just take a good look at it once my brothers 4runner is off the pit in the garage and see what I can make work.

steptoe · Post by **steptoe** » Mon Dec 29, 2008 10:15 pm

Alright, so you are saying you know what the rear bump stops look like and where they go on 4WD MY but asking if someone has done any different when doing an MY sedan normally FWD to 4WD, yes?

I just went out to brave the fat redbacks and looked at my Brumby. Noticed it hasn't corrected itself since the 0.6 m (800kg) of crusher dust was in there bump stop gap wise.

Does the MY sedan have the boxed sheet metal cross member the same as the Brumby (maybe the wagon too) where my factory bumps stops are mounted. Hanging down from this box section the round cone shapes bang on to a platform welded to a swingarm at the same point as brake hose attaches

AndrewT · Post by **AndrewT** » Mon Dec 29, 2008 11:04 pm

I think this thread is now crying out loud for some detailed photos of MY rear end! (har har).

discopotato03 · Post by **discopotato03** » Wed Dec 31, 2008 11:27 pm

Phinzinza I'm curious , what was the donor car for the rear end bits . I would have thought that all 4WD MY's would have had bump stops .

Do your trailing arms have the striker chanel welded to the tops of them approx half way along ?

Welcome to 09 , 2nd laast of the noughties !

Phizinza · Post by **Phizinza** » Fri Jan 02, 2009 6:31 pm

I must really write confusing or something??????

Torsion bar is from 82 wagon. It has the bump stop bit welded to it. The 2WD MY's DIDN'T come with rubber bump stops and where the 4WD bump stops bolt on it has no hole, no reinforcing, and no captive nut. I can drill a hole, and I can put a nut in. But to me it looks like when I hit a bump the body is just going to push into the seat and the bump stop won't do its job...

I can't see any better place to put one, so I guess I'm just gonna reinforce the spot and put a 4WD version bump stop in the std 4WD place.