why my rear wheels angled in the front?

[kevinghiani]

I bought this 71 911 roller that PO mentioned is on swb suspension.the caliper spacing is 3 inches on both front and back.
I am thinking of building an R car with 2.0 engine and my questions are :
is rear 3 inch caliper distance swb( I read they are 2.5 )?
is LWB (like stock 70 car ) car brakes much better than swb ?
is the angle maybe due to springplate?

will try to post some pics later and thank you for your inputs.
kevin

[kevinghiani]

[ossiblue]

You look to have swb trailing arms and spring plates. The spring plates have elongated holes for toe-in adjustment and that may be what is necessary, but the amount of toe-in shown seems to be beyond the adjustment range.

Can you post a picture showing how the trailing arms are bolted to the spring plates? One with the rear wheel removed or one more focused on the attachment points from the inside, would work.

Keep in mind that using the swb suspension, even when toe-in is corrected, will place the rear wheels very close to the front of the wheel well. Not only will it look odd, but using lager tires/wheels can result in rubbing.

[kevinghiani]

Thank you for the response !

[chris_seven]

The trailing arms are LWB - if you look at the bracing between the plate that bolts to the spring plate mounting flange and the tube you can see this is a LWB arm from a 911T or another model that didn't have a rear sway bar. The SWB Arms are completely different in this area.

The SWB Spring plate is shorter and also thinner than the LWB plate.

If the arms were SWB the rear wheels would be in the wrong position relative to the rear wheel arches as they would be just over 2" too far forward.

It is possible that the Spring Plates are SWB but the photographs don't show enough detail.

[ossiblue]

Originally Posted by chris_seven

The trailing arms are LWB - if you look at the bracing between the plate that bolts to the spring plate mounting flange and the tube you can see this is a LWB arm from a 911T or another model that didn't have a rear sway bar. The SWB Arms are completely different in this area.

The SWB Spring plate is shorter and also thinner than the LWB plate.

If the arms were SWB the rear wheels would be in the wrong position relative to the rear wheel arches as they would be just over 2" too far forward.

It is possible that the Spring Plates are SWB but the photographs don't show enough detail.

Yes, I agree^^. I missed the bracing when I first looked at your photos. You seem to have LWB trailing arms and SWB spring plates. That would account for the extreme toe-in.

Again, you can either switch out the trailing arms to SWB, or switch out the spring plates to LWB. Keep in mind that going the SWB rout will place the wheels too far forward in the wheel well. Cost-wise, it's probably cheaper to buy used LWB spring plates and put the wheels in the correct position.

[Trackrash]

Good opportunity to get adjustable, SC or Carrera, spring plates.

Definitely go with LWB parts.

Can you post a picture of your rear fender with the torsion bar hole? A shot showing the shock rear shock mounts might be helpful as well.

[chris_seven]

To fit an SWB Arm on a 1971 shell you would have to move the position of the trailng arm brackets on the torsion bar tube.

[kevinghiani]

Thanks for all the inputs ! Acutaullay I would prefer to keep it stock and less costive ! I will try to get picture of plates soon ! I believe I have lwb springplates
I Barely could get this pic of trailers arm I guess part number by my phone last week , but will try to remove the tire and have a pic of springplates in the next couple of days !

[chris_seven]

It looks increasingly as if you do have SWB Spring Plates fitted.

The ends of the trailing arms should be bolted between the brackets welded to the torsion bar tube and not hanging is space.

The ends of the rams are too high and are sitting at the wrong angle and are clearly not bolted into the correct location.

If you unbolt them from the spring plates and fasten the correctly to the torsion bar tube the solution to your problem will become obvious.

[chris_seven]

It looks increasingly as if you do have SWB Spring Plates fitted.

The ends of the trailing arms should be bolted between the brackets welded to the torsion bar tube and not hanging is space.

The ends of the arms are too high and are sitting at the wrong angle and are clearly not bolted into the correct location.

If you unbolt them from the spring plates and fasten the correctly to the torsion bar tube the solution to your problem will become obvious.

[Steve@Rennsport]

Before you start your project, I'd strongly recommend putting the chassis on a Celette to make sure its straight & not bent.

[kevinghiani]

thanks

[flat6pilot]

I have a set of used SC spring plates available if you're interested.

[kevinghiani]

Thanks Kyle ! I have these set as you see one in the pic ! Any advantage of sc's to theses?
Also thanks to all you guys for info.
Chris, the arms are not hanging and they are bolted probably is the picture.
Can I easily change the spring plates by just removing these 4 bolts and nuts or any additional trick to remove them?
Thanks for you tips,
Kevin
n

[Trackrash]

It looks like you have SWB spring plates on the car now.

The other ones appear to be SC or later with the adjustable feature.

You will need to set the torsion bar angle when you replace the spring plate. A search should turn up the details of that procedure.