[WIP] BMW Z3

[andybpowell]

I am terrible at reading charts. What are the axis values here? When you say speed are you referring to motor rpm or vehicle mph?

the speed is motor rpm on the right hand scale the inverter temp and current on the left

[andybpowell]

Here's the latest run hit a max speed of 65mph felt strong and smoothe just ran out of road

6.7mph per 1000 rpm so for me a theoretical 94mph if it makes max rpm and it feels like it will

[Jacobsmess]

What does that work out at rpm/V?

[tom91]

What does that work out at rpm/V?

Did you see his speed level off? So there is no point speculating.

[andybpowell]

managed to get an extra 5mph had to brake pretty hard at the end of it though
I really need to get to a decent stretch of road so 70 Mph and still pulling strong

[Jacobsmess]

Gosh darnit, looks like I might have to sell both the leaf motor and GS450H at the rate!

[tom91]

Gosh darnit, looks like I might have to sell both the leaf motor and GS450H at the rate!

Why? GS450h has a way higher prop speed. And also should be the more powerful motors.

The only real upside of the IS300h is the not needing of an externa oil pump.

[Jacobsmess]

Why? GS450h has a way higher prop speed. And also should be the more powerful motors.

The only real upside of the IS300h is the not needing of an externa oil pump.

No oil pump, simpler, less to go wrong, lighter and smaller

[tom91]

No oil pump, simpler, less to go wrong, lighter and smaller

Down side: 4500 rpm prop speed limit. Lets not dilute this thread more with things already covered in other topics.

[Woodfie]

managed to get an extra 5mph had to brake pretty hard at the end of it though
I really need to get to a decent stretch of road so 70 Mph and still pulling strong

70.png

Very Impressive, thanks for graf and graphing.

Would you be able to do some stable runs at any 10mph, 20mph, 30 mph, ........etc. etc .

Keen to know approximate stable current draw data.

Much appreciated if not too difficult to find an airfield
( just kidding) or decent bit of flat road.

[andybpowell]

Very Impressive, thanks for graf and graphing.

Would you be able to do some stable runs at any 10mph, 20mph, 30 mph, ........etc. etc .

Keen to know approximate stable current draw data.

Much appreciated if not too difficult to find an airfield
( just kidding) or decent bit of flat road.

decent empty road is my problem I'm afraid

[Woodfie]

decent empty road is my problem I'm afraid

Yes, imagine that is a challenge.. anything approximating stable current draw , you can manage would be great, as your chart can be interpolated to suit difficult request folks like myself. Thanks.

[andybpowell]

Yes, imagine that is a challenge.. anything approximating stable current draw , you can manage would be great, as your chart can be interpolated to suit difficult request folks like myself. Thanks.

no problem happy to help where I can

[Aragorn]

looks like circa 325A and 350v at the battery? so ~115kw

Is it still limited in software, or is that all it will give?

[Woodfie]

no problem happy to help where I can

One question, the time line on the bottom, is that on tenths of a second,
looks exceptional acceleration if that is so. Thanks

[Woodfie]

Looks like hundreds, so 30 to 60mph in couple of seconds .

Helps put your earlier post in line.. about screaming and wheel spinning down the road.

[andybpowell]

looks like circa 325A and 350v at the battery? so ~115kw

Is it still limited in software, or is that all it will give?

It's limited in software currently

[andybpowell]

Looks like hundreds, so 30 to 60mph in couple of seconds .

Helps put your earlier post in line.. about screaming and wheel spinning down the road.

No idea on the bottom scale

[royhen99]

I think the numbers across the bottom are sample number. The time varies with "Burst length" but from tests I have done it is about 27-28ms per sample with "Burst length" = 10.

[andybpowell]

80 ish it might have been 78-79 but near enough

need more road

[barracuda816]

This is fantastic. Really shows the l210 is a usable option. Thanks for sharing all your hard work.

[Jacobsmess]

Amazing, 12000 rpm and no signs of levelling off!

[Woodfie]

Great work, has put my attempted use of the Prius zvw30 inverter with the L210 sadley to rest... To be replaced with the 300h inverter, and have ordered a Zombie, to follow the path you have blazed... Again well done and thanks.. Enjoy your Zipping 3 around

[mfox]

This is fantastic. Really shows the l210 is a usable option. Thanks for sharing all your hard work.

I though from the beginning it should not be a problem whit top speed, despite those gear rations etc...
I mean , Lexus top speed wasn't 100-120 km/h.. It is much more with the same gearbox... Why should be now the problem..
ok , you need to change low ratio diff etc.. but that is not problem..

And I believe max power is approx the same as 450h, despite official rating.. Maybe is gh450 slightly more but nothing significant.
I think Is300 is better option then gs450. Smaller, lighter, single speed, no extra oil pump (no extra 12v power consumption), It has PARKING LOCK prop,
easier to run...

[andybpowell]

My Z3 is pretty much off the road for now as the extremely harsh power delivery makes it hard to drive safely and will tear out my bushes some of the updates in the Zombie pipeline should relieve or hopefully fix this issue so I'm doing the jobs I put off while evaluating the feasibility of the 300h which I think we can all agree has been decided as a yes it is.
My rear battery box only has a fuse, no contactor and no safety disconnect the contactor I have and is a simple fix and I have purchased a kia niro (I believe) safety disconnect which also contains a fuse, the only issue with it is that the fuse sits about 10mm higher than the mountings for the disconnect

So I made an adapter to allow me to mount it flush with the top of my rear battery box, since I dont have a 3d printer or the cad skills required I made it using my CNC mill which was probably a lot quicker than printing anyway

I also need to tidy the wiring and plumbing