Search found 127 matches
- Fri Apr 26, 2024 8:03 am
- Forum: BMW
- Topic: BMW MINI E...ev battery to low to charge
- Replies: 4
- Views: 646
Re: BMW MINI E...ev battery to low to charge
I've heard anecdotally that some BMW systems have a "lockout" in the BMS. If the battery is discharged too low, or the vehicle is crashed, the BMS can go into a state where it will essentially brick itself. I dont know the specifics though. But if that is the issue, you may find that manua...
- Tue Apr 23, 2024 8:00 am
- Forum: General
- Topic: Axle Removal
- Replies: 15
- Views: 1460
Re: Axle Removal
As for getting this style axles out, some have too sloppy of a bore for the retainer spring and the spring can get out of place to where it binds Hmm yeah, i ran into that issue with an Audi CV joint where the shaft was retained onto the joint with a snap ring. It came apart after much anger with a...
- Mon Apr 15, 2024 1:55 pm
- Forum: Charging
- Topic: Charging one battery from another as an alternative to parallel packs.
- Replies: 9
- Views: 699
Re: Charging one battery from another as an alternative to parallel packs.
My understanding of big smps is that they will have a PFC stage to boost the internal DC bus up to a voltage higher than is required, then they buck down from there to the desired output voltage?
- Mon Apr 15, 2024 12:38 pm
- Forum: Charging
- Topic: Charging one battery from another as an alternative to parallel packs.
- Replies: 9
- Views: 699
Re: Charging one battery from another as an alternative to parallel packs.
What happens if you feed DC into the AC input of a typical OBC (say a telsa Gen3 or one of the MG units)? Many switch mode PSU's i believe will happily accept DC on their input?
- Mon Apr 08, 2024 1:41 pm
- Forum: General
- Topic: Axle Removal
- Replies: 15
- Views: 1460
Re: Axle Removal
yeah you'll want to make a piece of steel with three holes, so your slide hammer is centred on the flange. Bolt your steel on where the CV attaches.
This is a wheel hub, but you'll want to end up with the same alignment:
This is a wheel hub, but you'll want to end up with the same alignment:
- Mon Apr 08, 2024 1:26 pm
- Forum: General
- Topic: Axle Removal
- Replies: 15
- Views: 1460
Re: Axle Removal
try a bigger slide hammer
Failing that, a hydraulic press. But it will be a challenge getting it jigged up in such a way as to apply the force in the right direction
What ever you do make sure your pulling straight and not pulling from the side.
Failing that, a hydraulic press. But it will be a challenge getting it jigged up in such a way as to apply the force in the right direction
What ever you do make sure your pulling straight and not pulling from the side.
- Mon Apr 08, 2024 8:44 am
- Forum: Projects
- Topic: [DRIVING] BMW Z3
- Replies: 348
- Views: 218668
Re: [WIP] BMW Z3
looks like circa 325A and 350v at the battery? so ~115kw
Is it still limited in software, or is that all it will give?
Is it still limited in software, or is that all it will give?
- Wed Apr 03, 2024 8:19 am
- Forum: Inverters / Motor Controllers
- Topic: Absolute lowest voltage to run a Tesla SDU
- Replies: 2
- Views: 421
Re: Absolute lowest voltage to run a Tesla SDU
with a 15kwh target its surely possible to configure a battery with a much higher voltage?
- Mon Apr 01, 2024 11:23 am
- Forum: Projects
- Topic: [FIRST DRIVE] Citroën CX and Tesla SDU
- Replies: 19
- Views: 5667
Re: [FIRST DRIVE] Citroën CX and Tesla SDU
did you buy a pack? Or 8 "loose" modules? I wonder if they've come out the back door of a dealership that has replaced them under the warranty recall? IE they are ALL faulty? Seems very odd to have so many failures, it looks like all 5 modules have issues. In the warranty recalls its unusu...
- Wed Mar 20, 2024 1:32 pm
- Forum: General
- Topic: 2024 Best battery: 100kg limit
- Replies: 11
- Views: 886
Re: 2024 Best battery: 100kg limit
I think the modules/cells are the same as the other BMW ones, they're just configured as 8s rather than 16s and theres twice as many.
- Wed Mar 20, 2024 11:27 am
- Forum: General
- Topic: 2024 Best battery: 100kg limit
- Replies: 11
- Views: 886
Re: 2024 Best battery: 100kg limit
The main issue is the smaller hybrid packs are not as energy dense as they're setup for power. For instance the BMW packs are ~6.5kg per kWh, the VW ones are in the 8-9kg range. The best batteries are in the 4.5kg range, but are arranged in such a way that 100kgs of them isnt going to give you 400v....
- Tue Mar 19, 2024 3:44 pm
- Forum: Tesla
- Topic: LDU Forward and Reverse LV power issue
- Replies: 10
- Views: 865
Re: LDU Forward and Reverse LV power issue
Surprisingly small DC-DC output. Many OEM units seem to be in the 150A+ range.
- Tue Mar 19, 2024 9:18 am
- Forum: Vehicle Control (VCU)
- Topic: Bosch Accelerator Pedal pinout?
- Replies: 7
- Views: 828
Re: Bosch Accelerator Pedal pinout?
Not exactly the same but potentially the same family of pedals, should be easy to compare.
I've used older bosch pedals that also use the same arrangement, its just a pair of variable resistors. The pins are jumbled about for whatever reason.
I've used older bosch pedals that also use the same arrangement, its just a pair of variable resistors. The pins are jumbled about for whatever reason.
- Mon Mar 18, 2024 12:24 pm
- Forum: Tesla
- Topic: LDU Forward and Reverse LV power issue
- Replies: 10
- Views: 865
Re: LDU Forward and Reverse LV power issue
some sort of noise/interference tripping out the DC-DC converter?
The controller or inverter cant be pulling sufficient current itself to pull the DC-DC output down by that much, its hundreds of amps. But if the DCDC shut down, all the loads on the 12v would see the lead acid droop pretty quickly.
The controller or inverter cant be pulling sufficient current itself to pull the DC-DC output down by that much, its hundreds of amps. But if the DCDC shut down, all the loads on the 12v would see the lead acid droop pretty quickly.
- Mon Mar 18, 2024 11:11 am
- Forum: Inverters / Motor Controllers
- Topic: Theoretical Question regarding Fweak
- Replies: 4
- Views: 897
Re: Theoretical Question regarding Fweak
Have you looked at the extra-spicy "current control" firmware that catphish created?
viewtopic.php?p=55078#p55078
viewtopic.php?p=55078#p55078
- Fri Mar 15, 2024 10:42 am
- Forum: Projects
- Topic: 1984 Voltswagen Rabbit Prius Gen 3 ZOMBIE
- Replies: 419
- Views: 32503
Re: 1984 Voltswagen Rabbit Prius Gen 3
image.png VW box has two flanges in the diff as pictured for the CV's to bolt onto. you take those stubs, weld them to the Toyota stubs and end up with something like this: image.png Which has prius on one end and VW flange on the other, and if its all measured up correctly, puts the flanges in the...
- Fri Mar 15, 2024 10:38 am
- Forum: Projects
- Topic: 1984 Voltswagen Rabbit Prius Gen 3 ZOMBIE
- Replies: 419
- Views: 32503
Re: 1984 Voltswagen Rabbit Prius Gen 3
If you arrange the stubs so that they give the same overall spacing as the original VW trans, the stock VW shafts simply bolt right in like factory.
- Fri Mar 15, 2024 10:33 am
- Forum: Projects
- Topic: 1984 Voltswagen Rabbit Prius Gen 3 ZOMBIE
- Replies: 419
- Views: 32503
Re: 1984 Voltswagen Rabbit Prius Gen 3
The VW inner CV's are bolted, but they have a movable element in the CV itself.
- Tue Mar 12, 2024 11:03 am
- Forum: Projects
- Topic: [DRIVING] VW Beetle 2003
- Replies: 328
- Views: 107455
Re: [DRIVING] VW Beetle 2003
Why would a steep driveway kill the inverter?
Surely it sees far more current at full throttle accelleration on the road?
Surely it sees far more current at full throttle accelleration on the road?
- Mon Mar 11, 2024 9:36 am
- Forum: Tesla
- Topic: LDU Overcurrent Sense Issue/Question [SOLVED]
- Replies: 5
- Views: 1205
Re: LDU Overcurrent Sense Issue/Question [SOLVED]
Those 6 lines appear to be inputs to a NAND gate. image.png The NAND takes the 6 fault signals, plus the output from the overcurrent comparator, and applies the NAND logic function. In effect, it will output low only if all 7 inputs are "high" Thus in normal operation, all 6 fault lines, a...
- Wed Mar 06, 2024 4:34 pm
- Forum: Projects
- Topic: 1984 Voltswagen Rabbit Prius Gen 3 ZOMBIE
- Replies: 419
- Views: 32503
Re: 1984 Voltswagen Rabbit Prius Gen 3
urgh i really want a squarebody. Unfortunately while they're literally found like weeds on every street corner in the US, they're like rocking horse poop here and go for silly money.
- Wed Mar 06, 2024 4:13 pm
- Forum: Projects
- Topic: 1984 Voltswagen Rabbit Prius Gen 3 ZOMBIE
- Replies: 419
- Views: 32503
Re: 1984 Voltswagen Rabbit Prius Gen 3
2" drop spindles and 2" springs should be the default for a C10 ;) You can investigate shorter dampers or even limiting straps. Some modified 4WD's have springs that come out of the seats by design, but they have some sort of cone arrangement to guide the spring back into position when it ...
- Wed Mar 06, 2024 3:55 pm
- Forum: Projects
- Topic: 1984 Voltswagen Rabbit Prius Gen 3 ZOMBIE
- Replies: 419
- Views: 32503
Re: 1984 Voltswagen Rabbit Prius Gen 3
Cutting springs gets a bad rap, but its one of those "it depends" things. Some springs like those shown here, are parallel at one or both ends. Cutting those (on the parallel end!) is generally fine, and it can work fairly well. As above, you end up with a shorter spring and a little bit m...
- Tue Mar 05, 2024 10:26 am
- Forum: Projects
- Topic: [DRIVING] BMW Z3
- Replies: 348
- Views: 218668
Re: [WIP] BMW Z3
Are there not factory LSD options that can work instead of buying new?andybpowell wrote: ↑Sat Mar 02, 2024 1:57 pm now my diff is on the way I'm really tempted to order a lsd for it in fact I'm on the Matt Lewis racing site with it in the basket right now trying to be sensible and really struggling because I really really want it
- Tue Mar 05, 2024 10:08 am
- Forum: Inverters / Motor Controllers
- Topic: Twining prius inverters. Implausible idea?
- Replies: 5
- Views: 599
Re: Twining prius inverters. Implausible idea?
I imagine the range rover modules will be a little heavier per kwh than the MEB ones, but its probably not that much more, and you'll end up with a much simpler result with plenty power and voltage available to run the motor without worrying about boosting.