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05-03-2020, 08:10 AM | #178 |
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Hello.
Anyone who managed to make servotronic work can help me with a part number of their jbbfe unit? I am doing the same retrofit in my 3 series and already tried 2 jbbfe units (2 and 3) and none of them is working. Aster opening the modules and tracing the circuit it seems in my modules are missing the parts which should control the servotronic valve. Thanks. |
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07-16-2020, 01:29 PM | #180 | |
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08-31-2020, 08:02 AM | #181 |
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I did the swap a few months ago. Pretty simple, just had to dremel the plastic guide off and use my original tie rods.
Thought about doing the servotronic, but after the first drive “why??” Car drives perfect without servotronic. Love the weight of the wheel now. And my wife barely noticed, didn’t complain. And she’s a complainer usually. |
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10-26-2020, 03:37 PM | #183 |
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02-22-2021, 06:09 PM | #186 |
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Have you reached out to bimmergeeks?
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05-25-2021, 04:14 PM | #187 |
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Just want to update Swapped my rack in this past weekend. Game changer! Id put this Near the top of the must Do list for this car. Im amazed how much it changed the Character.
And there absolutely no reason for servo unless you are at a dead stop. I dont typically turn ly wheels much at a dead stop, that was drilled into my head by my driving instructor that was obviously responsible for buying tires for his work car lol I notice little To no difference in effort. If i get bored I might wire it up later but see no reason to right now. |
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05-25-2021, 09:33 PM | #188 |
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You cannot just enable servotronic without the CORRECT JBBF module. You need the unit stamped "M" and I think maybe another one works as well i dont remember... not all JBBF modules are built the same so check pictures for the "M" stamp.
The details are all here: https://www.spool [remove this] street.com/threads/servotronic-on-a-335i.1400/page-10 coding is very easy... $80 for the correct JBBF unit and it works 100% and it feels fantastic. At idle I can turn the wheel with my pinky... above 20mph feels exactly the same. So much easier to autocross now! and move the car around/park. kristikapa @MDMA 135i DimitrisM3 Liquidsk8s machine4321 |
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05-25-2021, 09:34 PM | #189 | |
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You cannot just enable servotronic without the CORRECT JBBF module. You need the unit stamped "M"... not all JBBF modules are built the same so check pictures for the "M" stamp.
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street.com/threads/servotronic-on-a-335i.1400/page-10 coding is very easy... $60-$80 for the correct JBBF unit and it works 100% and it feels fantastic. At idle I can turn the wheel with my pinky... above 20mph feels exactly the same. So much easier to autocross now! and move the car around/park. kristikapa DimitrisM3 Liquidsk8s machine4321 |
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11-30-2021, 07:31 PM | #191 |
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I have done a bunch of research on steering pumps.
I can provide a cloned ZF pump from China that matches the 1M pump specs with a 1 year warranty but there is a minimum order requirement.... Is anyone interested in a group buy for them? I would need at least 10 of them and they would be priced under $150 shipped for the new ZF cloned 1M pump. Alternatively we can also convert an E53 X5 pump or Land rover to pump to use the M3 steering valve. The pump would then just need a custom aluminum spacer which I can provide which would probably be $75 or so such that the short nosed ZF housing has the right pulley spacing. What do people think? -Rich
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2007 E70 X5 4.8i with 10" android screen Running 265/60/18 AT34s All Terrains (Mainly for road trips)
2008 E90 335i with 10" android screen, 7" intercooler, inlets, Dinan intake, JB4 BEF, E85 conversion, Mfactory LSD, M3 suspension, EDC shocks with custom controller. |
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12-01-2021, 01:26 PM | #192 | |
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The servo valve exists on the steering rack and without servo connected the valve is closed resulting in restriction causing higher steering effort than intended. Adding the correct JBBF module to power the valve on the rack allows it to open and flow enough fluid to give proper power steering. I don't see any need for a "1M" pump unless you want the 1M steering reservoir to be a seamless retrofit without needing to use extra fittings and a custom hose. |
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12-01-2021, 02:25 PM | #193 | |
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- Surprisingly the brakets are the same but the pump is completely different. ZF and Luk must have collaborated on standardized the mounting points (or one copied the other).... see: https://www.realoem.com/bmw/enUS/sho...diagId=32_1639 01 Power steering pump LF30 1 vs https://www.realoem.com/bmw/enUS/sho...diagId=32_1737 (it should be listed as a ZF FP6 but realoem doesn't say that on this page.) The normal 135i pump is a Luk30. While it is rated at the same pressure it is a smaller pump. Most have reported that the Luk30 provides less assist than what the 1M has. Some have adjusted the servo settings to compensate for the standard pump. The input port is 16mm on the Luk30 and 20mm on the ZF FP6 but it is also possible to get a ZF pump with the 16mm input tube. (The M3 ZF pump input tube is only 16mm). Given that the Luk30 and ZF pumps use the same pulley this points to the Luk30 has having less flow. The Luk30 is clearly a smaller pump. I guess I could open them up to show the actual internals but the LF is about 3" on the case and the Luk is about 2.5" Here is a comparison of the M3 LF pump (which has the same internals as the 1M just in a short nose housing with the valve on the opposite side) vs the Luk30. The pictures in realoem for these pumps is accurate showing them as different pumps. LF pumps are easy to spot because they have an extra bump in the housing next to the valve. The valve is also completely different... vs Luk30 Even the pulley bolts are a different length, the Luk30 uses a 25mm bolt and the 1M and active pumps need to be shorter at 18mm or they hit the housing. Many have been successful at running the M3 rack with the Luk30 so it does work but to fully retrofit the larger pump would be needed to be exactly the same as the 1M. -Rich
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2007 E70 X5 4.8i with 10" android screen Running 265/60/18 AT34s All Terrains (Mainly for road trips)
2008 E90 335i with 10" android screen, 7" intercooler, inlets, Dinan intake, JB4 BEF, E85 conversion, Mfactory LSD, M3 suspension, EDC shocks with custom controller. Last edited by rbryantaz; 12-01-2021 at 02:48 PM.. |
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05-13-2022, 06:54 AM | #194 |
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I just did the m3 steering rack mod and honestly to anyone on the fence due to this servo nonsense i cannot believe anybody here who complained about the stiffness. It legit feels amazing and is not that stiff by any means. I was worried after reading some comments on here but rest assured it is like. 25-35% stiffer than stock i much prefer it now the way it is. My mod list is very long so i basically have every suspension modification out there and this was a very much appreciated addition although I was forced to do it due to my oem rack failing and leaking from the inner tie rod boot area more so it also even solved a clicking sound i was getting going over bumps/ridges which were clearly related to my rack seals giving out months later and causing this leak. I paid 350 for my m3 rack after long searches on ebay.
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05-31-2022, 12:51 PM | #195 | |
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06-29-2022, 01:53 PM | #196 | |
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After a "full" M3 front swap on my 335i with spindles, struts, rack (with M3 shaft), control arms, swaybar (essentially everything that can be swapped into the 335i subframe) I didn't even have to re-center my steering wheel and the toe and alignment were within spec! I will get it aligned but it was surprisingly close when I did a quick toe and camber check to see if I would have to make adjustments for initial test drives such that I didn't even have to adjust it. My modified LF6 active steering pump is working perfectly so far. It is essentially the same as the m135i pump and was inexpensive to modify with parts from an M3 pump. I was a bit paranoid that it would leak or not work but it has been perfect so far. Details on the modification to remove the LF6 135/335 active steering pump's servo and replace it with a regular PS valve are in the sp00lstreet thread. So far the steering to me feels much like the original 335i setup. The used 335i active steering pump cost me about $50 and the M3 pump was $80 or so. I then used a $1 dowel pin pressed (driven with a hammer and punch) into the active steering servo hole. So for $131 invested to create a m135i PS pump it worked out very well! There has been some great work to change the servotronic to use values more like the M3 comfort/sport so I plan on trying that shortly especially given that the larger LF6 pump doesn't seem to have the slightly heavy feel that people describe with the stock Luk30 pump and the M3 rack (but I haven't done side by side testing). I am quite happy with this modification. -Rich
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2007 E70 X5 4.8i with 10" android screen Running 265/60/18 AT34s All Terrains (Mainly for road trips)
2008 E90 335i with 10" android screen, 7" intercooler, inlets, Dinan intake, JB4 BEF, E85 conversion, Mfactory LSD, M3 suspension, EDC shocks with custom controller. Last edited by rbryantaz; 06-29-2022 at 02:02 PM.. |
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01-13-2023, 03:09 PM | #197 |
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Can someone chime in on final word, getting ready to do this over the weekend as my M3 rack just showed up.
I'm totally M3 front end, knuckles arms dampers end links strut brace etc etc. Which steering tie rods do I use? I'm assuming in my case I want the M3 tie rods on the rack that arrived, since it will match up to the mounts on the M knuckle/spindle I have and allow for proper alignment. I also have low mile nonM tie rods on my blown rack which I am uninstalling so other than the work to switch them over to the new rack, I can easily do either. Thanks.
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01-13-2023, 03:26 PM | #198 | |
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So I would just use the inner/outer tie rod from the original car. I would however use the M3 steering shaft and coupler if your rack came with it.... I used the M3 parts on my 335i from the rack to the last steering wheel connection and was able to skip re-indexing the steering shaft, etc. With my swap with the M3 knuckles, new control arms, m3 rack they didn't even change the alignment when I took it in and steering wheel was even centered (it turned out to be a waste of money to even align it). But that required changing to all of the M3 knuckles, brakes, struts, etc as I mentioned. -Rich
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