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E30 rear adjustments

Posted: Mon Jun 15, 2015 7:32 pm
by zonkey
Hi guys
Building S50e30 atm
What mods need done to rear
ie the brackets n rear beam for semitrailing arms

Do you raise the inner one and mover outer back on beam?
If so by how much.. Roughly (20mil/30mil)
I know it will depend on how much the car is lowered but is there a ballpark figuRe yous start at and work from

It's for drifting.. Lowered on gaz coilovers

All advice welcome

Pete

Re: E30 rear adjustments

Posted: Wed Jun 17, 2015 9:08 am
by Mikey_Boy
Hi Pete - you need to talk to DanThe on here - he will sort you out with a rear beam that's adjustable for camber and toe.

Good luck! :thumb:

Re: E30 rear adjustments

Posted: Wed Jun 17, 2015 2:23 pm
by DanThe
Cheers Mike, as said Pete I can supply either the brackets needed for this mod which you weld to the beam yourself, or I can supply a completed beam thats been sandblasted and powder coated ready to go

Image

Image

Send a pm for price & availability info 8)

Re: E30 rear adjustments

Posted: Thu Jun 18, 2015 7:53 am
by zonkey
Good job

re:the slots..

If I get them, is it just a case of welding them onto original position..

Do the outer ones have the horizontal slots to reduce toe out and inner have the vertical slots to reduce camber?? Or other way around..

Anybody who has used these.. Can u finish with say 1 degree +ve camber and 1 deg toe in

Cheers pete

Re: E30 rear adjustments

Posted: Thu Jun 18, 2015 9:01 am
by DanThe
It depends how much you lower by for the camber, toe in is easily achievable though regardless of height.

I can't see how you would get + camber with a lowered car though, you would have to fit the plates above the hole, with maximum adjustment I can't get the wheels vertical on my track car, its at a decent height not massively low

Image

Re: E30 rear adjustments

Posted: Thu Jun 18, 2015 9:03 am
by Mikey_Boy
Me thinks positive and negative camber are being mixed up! 8O

Re: E30 rear adjustments

Posted: Thu Jun 18, 2015 11:12 pm
by zonkey
If slightly +ve camber, then when power on, and a bit of squat u'd be wanting flat contact..

So which is which..
Horizontal inner, vertical outer or does it matter..

Maybe not.. But those of you more mechanically/engineered folk are bound to know..

P

Re: E30 rear adjustments

Posted: Fri Jun 19, 2015 1:07 pm
by DanThe
Correct, camber is adjusted on the inside, toe on the outside
You can fit them higher on the inside to give you more + camber but I would offer the plate up to the beam with it still fitted to the car first, as a guess id say just half overlap the hole, don't take the plate above the hole completely

Re: E30 rear adjustments

Posted: Fri Jun 19, 2015 9:58 pm
by Mikey_Boy
You'll always struggle to get a flat contact patch with semi trailing rear arms given they are always moving in 2 axes for both camber and toe, producing contradictory effects of what is needed... If you are drag racing only then what you state above kind of holds true. Most of us go around corners as well meaning that statically you need (ideally) as close to vertical as possible so that the car's roll is accounted for equally by the corresponding negative camber that results from that roll.

Either way, Dan's set up is a heck of a lot better than standard...! :thumb: