new AKG subframe-raising bushings

[gearheadE30]

http://www.akgmotorsport.com/catalog...ion%2FBushings

AKG is now selling subframe bushings to raise the rear subframe either 9mm or 12mm. This will reduce negative camber and toe (which is what kills tires) on lowered cars and will move the roll center closer to stock. So far as I know, AKG is now the only company to offer these bushings in polyurethane so that they are actually relatively practical for street use. I don't have them yet, but I may be ordering some soon pending funds, heh

[dashboardmonkey]

i need these and the weld on camber/toe correctors

[Massive Lee]

Subframe raising mounts have been available for a while in weld-in steel. Kit includes spacers to keep the diff in the same location as well as stud that makes fitting the diff much easier. A weld-in mount means there will be no movement at all of the subframe and no greasing needed. Fit once, forget forever. Such mounts have been available in aluminum too from other vendors too.

[kenika65]

So with racing dynamic springs I would want the 12 or 9 and guess they don't make 12 for street

also for street would u want to keep rubber dif mount

[CorvallisBMW]

That's pretty cool. Easier to do than the weld-on TA adjusters and cheaper too. Plus no effect on ride height. Me likey.

[Aptyp]

how does this effect driveshaft and diff?

[BraveUlysses]

Pretty neat, will look into these once I refresh my subframe bushings.

[lifeiskaos]

how does this effect driveshaft and diff?

You space down the diff as much as your raise the driveshaft. You can see the spacers for this in Lee's picture above.

That keeps your driveshaft lined up and the diff bushing aligned

[CorvallisBMW]

how does this effect driveshaft and diff?

It will add some extra angle to the u-joints at the csb and diff, but not much and certainly not enough to have an adverse effect

[gearheadE30]

Subframe raising mounts have been available for a while in weld-in steel. Kit includes spacers to keep the diff in the same location as well as stud that makes fitting the diff much easier. A weld-in mount means there will be no movement at all of the subframe and no greasing needed. Fit once, forget forever. Such mounts have been available in aluminum too from other vendors too.

Yeah, I know about the steel ones, but so far as I know these are the only poly ones. I've never tried sold mounts, but I'm under the impression that they wouldn't be too great for the street heh.

[nando]

It will add some extra angle to the u-joints at the csb and diff, but not much and certainly not enough to have an adverse effect

you have to space the diff down. you don't want to mess with pinion angles..

[gearheadE30]

^^for sure. A friend had installed the metal ones awhile ago without spacers which I think changed the angle by like 3 degrees or something and it trashed the CSB and the driveshaft at the first track day, heh... 200k on the driveshaft, though.

[Mossman]

OMG diff studs that an ingenius idea, if I can find baby studs with those threads I'm gonna do that next time I drop one, seems like it would make reassembly cake, as long as there's room to get a nut on there, which I think there should be.

M12X1,5X25 is what realoem says, cant' find any fully threaded studs in m12x1.5 at mcmaster though.