Thought some info on what can be done may be of interest here. Basically what you can do is follow the mods used on BMW E30's, they are very highly developed in Europe and are still competitive. Which means your Datto can be too. The mods involve making the rear suspension geometry fully and independantly adjustable, see Frank's post # 124 here
http://forums.hybridz.org/index.php?/to ... e__st__120

And one pic from there

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Richard... http://www.youtube.com/watch?v=rqM9_Wq-TKc

I've always thought why no one out there has had a go at designing and fabricating a complete rear x-member than trying to improve on it, IMO it has been exhausted and something like above would be a real interesting concept of adaptation, will definately read up on that during lunch....

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"You stay classy OzDat"

One thing to keep in mind though, I'm pretty sure anything that has a rose joint in it is classed as a super sedan at race meets

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R30 skyline hatch TURBO project

how is camber adjusted on that one?
I dont see the benefit of this over what is already produced currently by workshops?

There are a series of pictures with explanations that show exactly how all adjustments are made, see the link. Frank also talks about changing the arm's sweep angle.

The only adjustment kits I've seen in AU are the usual slotted eccentric ones which can't compare with the BMW stuff.

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Richard... http://www.youtube.com/watch?v=rqM9_Wq-TKc

If the car is going to be street legal, you can't modify (ie weld) the suspension parts, which are classified as the semi-trailing arms and the lower control arms on the front. Cross members you can do what you like.
Also, rose joints (Heim joints etc.) can't be used.
If it's a track car, then go for it!!

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1972 Datsun 1600, S14 SR20DET Engineered (204rwkW @ 17psi.)
viewtopic.php?t=6579
#SR20Datsun @SR20Datsun

Well, it does say 'circuit mods' in the title SR20Datsun.
And just to clarify, Datsports 1600 crossmember although essentially slotted, is finely adjusted by bolt and thread in a similar fashion.


p.s. Maddat and Datsport arnt the only companies who do this sort of stuff for Datsuns.
Check out the rally forums for more ideas...

I knew that! (oops!)

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1972 Datsun 1600, S14 SR20DET Engineered (204rwkW @ 17psi.)
viewtopic.php?t=6579
#SR20Datsun @SR20Datsun

I didn't start this thread to knock local products, just thought it may be useful for anyone doing sprints or time attack. Besides I've seen a few 510's on the track, most of them look pretty awful at the rear end handling wise.

The other thing is it pisses me off seeing people rave about how well STA BMW's handle. Of course BMW owners usually are prepared to spend money to get their cars handling right and they do eg http://www.youtube.com/watch?v=SiBoP7tcG_s

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Richard... http://www.youtube.com/watch?v=rqM9_Wq-TKc

I think one of the things that stuffs up the semi-trailing arm suspension is the lowering of a car. Basically if you lower the rear end 2", you have to raise the cross member this much (or raise the brackets that much). This maintains the correct camber curve, and toe curves.
I did this (to some extent where practicable) on my semi-trailing arm mods that I did.
I think that's what they were talking about with the BMW modification...
By the time you raise the points, and then add a small amount adjustment, you should be fine.

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1972 Datsun 1600, S14 SR20DET Engineered (204rwkW @ 17psi.)
viewtopic.php?t=6579
#SR20Datsun @SR20Datsun

FWIW you can weld suspension components - an engineer just needs to approve it (no big deal).

He will only approve it if there has been an authorised welder who signs off on it, or if the welds have been crack tested by liquid-dye-penetrant, or x-ray or both. I've been there and done that.

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1972 Datsun 1600, S14 SR20DET Engineered (204rwkW @ 17psi.)
viewtopic.php?t=6579
#SR20Datsun @SR20Datsun

SW Motorsport does a rose jointed adjustable rear end

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1971 Datsun P510 SR20DET 276 rwkW
2005 Mercedes AMG E55 350 kW
1969 Datsun P510 L20B EFI 95 rwkW
1975 Ford XB Fairmont GS Wagon 179rwhp
1980 Escort Van SR20DET unfinished
2002 Suzuki GSX1300R Hayabusa 185hp

I wonder if i could get a coupl of R30 rear ends done?

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R30 skyline hatch TURBO project

That was what I use to think too, but not always necessary (welder signing off, crack testing or dye). Yours was pretty extensive though, so perhaps that why.