Comprehensive Steering Information Thread

[maupineda]

I got my rack this weekend and started installing it. The rack seems to be a high quality item, the exterior housing is almost a 1:1 replica of the OE design. Fitment is perfect and all clearances are same as the OE item

the only negative I have with it is the pinion dust cap, which is a very flimsy item, but the vendor I got it from was very nice and sent me an OE hard plastic one for a factory like setup.

Now the bad, which is nothing to do with the rack but rather bad luck as the top of the pinion seemed to have been damaged causing the intermediate shaft yoke to not slide in, so I had to remove the rack and I am in contact with Lucas and the vendor to define the next steps.

i will post photos of it and will document the details of the Z4M rack vs the black tag.

[maupineda]

Did your original rack have a problem, or you just wanted something quicker? I noticed my roadster has a silver tag rack vs green on the coupe, which I guess they all do? All the pics of the part number 32137836844 have a silver tag.

Hi Chris, nothing wrong with my rack at 53k miles, I just want the quicker rack. The MCoupe is not bad, but I have a Tesla Model 3 which has much faster steering and I find it better for my liking, the M requires way more lock in the winding roads I go to.

people say it can get twitchy, but I don’t buy it. I used to race karts with 1:1 ratio.

[chris719]

I just bought the black tag for my coupe. It will be interesting to see how it fares for road use with a more normal stocking wheel & tire setup

Did your original rack have a problem, or you just wanted something quicker? I noticed my roadster has a silver tag rack vs green on the coupe, which I guess they all do? All the pics of the part number 32137836844 have a silver tag.

[Bry5on]

From the data on this thread, the M coupe has the same knuckle ratio. The distance between the CA ball joint to the tie rod is 130mm on both.

Yeah I’m confused as most literature seems to have the m coupe at 13.7:1 (same as non-m ratio with 150mm/rotation rack) which is 126mm ball joint to tie rod from my scans. M3 is 130 as you’ve posted above. About 3% quicker on center

[maupineda]

Does the coupe have the M3 or non-m e46 steering ratio in the knuckles? M3 slower might be better in this case.

From the data on this thread, the M coupe has the same knuckle ratio. The distance between the CA ball joint to the tie rod is 130mm on both.

[YoitsTmac]

Not enough to not trip up DSC. It's very mild difference - M to non M (pivot point to steering tie rod leverage point. About 5-10% IIRC)

[Bry5on]

I just bought the black tag for my coupe. It will be interesting to see how it fares for road use with a more normal stocking wheel & tire setup

Does the coupe have the M3 or non-m e46 steering ratio in the knuckles? M3 slower might be better in this case.

[maupineda]

I just bought the black tag for my coupe. It will be interesting to see how it fares for road use with a more normal stocking wheel & tire setup

[bigjae46]

I have a black tag that I've tested in my cars as well (yellow, blue, purple, black have all been tested). I'm pretty sure a more robust power steering pump is needed to run the black tag…

If the steering is too light, wouldn't you want a lower pressure pump?

Reading it over it sounds like the rack can't displace enough fluid so it is causing an overpressure - seals blowing out and really light steering. The pump is a positive displacement vane pump so it will pump at the pressure that is regulated by the pressure relief and it doesn't care how much pressure the rack needs unlilke a centrifugal pump. For example, if the pump relief is 1500psi but the rack only needs 1000 psi...the rack is going to get 1500psi. Getting a heavier duty 1500psi pump will cause the same issue. Sounds like it needs a lower pressure pump.

[bullet0770]

I have a black tag that I've tested in my cars as well (yellow, blue, purple, black have all been tested). I'm pretty sure a more robust power steering pump is needed to run the black tag…


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Hi David, Which one did yo like the most for feel and drivability? I will be looking for a used rack and pt this for sale for someone looking for race car steering.

[Bry5on]

Wert 2 is for the non-m which has a ~3% quicker on center ratio than the M3 CSL. This is why it doesn’t show up in the M3s. My knuckle is ~6% quicker than the CSL so I’ll be programming in that non-m value. So it’ll be off by ~3% still.

I did the reverse a few years back, programming M3 ratio into my non-m MK60 so I’m assuming this should work just fine.

[karter16]

Oh no I’m not interested in one at all still. But my super knuckle is slightly quicker than OEM so I’m expecting this issue to show up. Just wondering how bad it is and if I’m going to have to consider a DSC delete, which I don’t want to do.

I'm curious to know whether anyone has actually tried programming LENKWINKELKENNLINIE_2 with the value underlying "wert_02" (I think it's 0x01 from memory?) as a custom parameter to an M3 MK60 with NCS? I've believe wert_02 would give a slightly faster ratio than the wert_04 (CSL). I know someone on M3Cutters figured out that wert_02 would be better, but when they looked in NCS it wasn't presented as an option so they gave up. My hypothesis is that it's possible the actual curve associated with that config value is still there, it's just not exposed for M3 VOs.

[Bry5on]

Don't do it. If you want mine, you can have it for Pennie's on the dollar to play with. Been meaning to list it locally as is. So done with it. Two alignments. The three times I went inspecting what the hell was going on. But the steering was like an F30 not in sport mode. Just no weight at all. It's pretty intense if you do anything remotely quick under 40 mph. Any aggressive driving in 2nd will require DSC stage 1 to be off

Oh no I’m not interested in one at all still. But my super knuckle is slightly quicker than OEM so I’m expecting this issue to show up. Just wondering how bad it is and if I’m going to have to consider a DSC delete, which I don’t want to do.

[1000hp]

If you're off, you'd reset with INPA anyways.

You can re-center the steering wheel with INPA?

How does it do that?

[bullet0770]

Any good place to look for? not the rackdoctor refurbished one. I would like to be original taken out of a car.

Green tags are on ebay for $100 and yellow 712 is around $300


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