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Forty Years of the Porsche 924 Turbo
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 Post subject: Re: Recycle your old EV.
PostPosted: Fri Aug 16, 2019 3:23 pm 
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Joined: Wed Sep 08, 2010 8:44 pm
Posts: 8948
Location: Birkenhead (UK)
Model: 924 na
Electric motors are (roughly) constant torque, like a petrol engine the faster they go the more power they produce and the faster they will accelerate the car.

A gearbox is a torque convertor, if you want to go up a 30% incline at low speeds you are going to need one because at low revs you haven't got the power.

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Andy
1983 Silver(ish)/rust n/a manual - Project Candy, SCRAPPED
1982 Guards Red n/a manual - Project 66, SOLD.
1982 Garnet Red n/a manual - Project XLE (506 licensed, 1421 sorn'd)
1983 White n/a manual - Mr White Returns


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 Post subject: Re: Recycle your old EV.
PostPosted: Fri Aug 16, 2019 7:42 pm 
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Joined: Tue Mar 21, 2017 10:01 pm
Posts: 343
Location: Sweden
Model: 924 turbo
Tesla m3 and m3p dyno curve. Power curve is flat like a table, or diving in the P case.

Though i would never ever want one in my vintage car though, its like replacing your 3 star Michelin platr with a big mac because it can fill your stomach faster :)


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 Post subject: Re: Recycle your old EV.
PostPosted: Sat Aug 17, 2019 2:23 am 
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Joined: Wed Sep 08, 2010 8:44 pm
Posts: 8948
Location: Birkenhead (UK)
Model: 924 na
From those graphs torque is roughly constant up to 5000rpm (40% of max revs) but then the power is limited to a constant above that, presumably limited because the batteries or motors are not up to higher powers.

I'm curious what happens below 2000rpm (18% of max revs = 23mph)?

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Andy
1983 Silver(ish)/rust n/a manual - Project Candy, SCRAPPED
1982 Guards Red n/a manual - Project 66, SOLD.
1982 Garnet Red n/a manual - Project XLE (506 licensed, 1421 sorn'd)
1983 White n/a manual - Mr White Returns


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 Post subject: Re: Recycle your old EV.
PostPosted: Sat Aug 17, 2019 6:07 pm 
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Joined: Fri Jun 03, 2011 10:23 pm
Posts: 4913
Location: Penzance, Cornwall
Model: 924
I appear to have found a chap in Canada who has done it to a 924!
I’m just tying to get some info off him. I haven’t got time to even consider doing it for a couple of years but, I think it would make an interesting project for someone?

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1986 924S. Needing love but, back on the road and loving it!
1986 928 S2 Long term project. Been in storage, needs full recommissioning.
1981 2.0 N/A. Still not running and I’ve had it for months!
1979 Mercedes 450SLC
1955 Land Rover Series 1 107 pick up
1981 VW T25 camper. ‘The nail’ very slow diesel burner.
1991 Toyota Celica. At £182, too cheap to refuse....


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