Hot-rodding the Toyota MGR

[pearl62]

This is what I would put it into:


More info here...

[e*clipse]

Originally Posted by pearl62

This is what I would put it into:


More info here...

VERY cool!!

I'm impressed - looking at your link, there may be a few EV's out there to race with. How fun!

Also, you mentioned a CRV back could be used to add RWD for that model?

Thank you for the inspiration!

[pearl62]

Originally Posted by e*clipse

Also, you mentioned a CRV back could be used to add RWD for that model?

Here's an example of an AWD Del Sol...

[freebeard]

If you haven't read all of this thread there is mention of the South Korean external cooler option. Even if you use your chosen pump, it should be instructive where Toyota engineers place the inlet and outlet.

Given your use case, what you are working toward is a Kinetic Energy Recovery System (KERS). This has implications for sizing the components, less batteries and charger, and more Coulombs passing through the circuits and wires.

You probably know that...

[pearl62]

Thanks for mentioning that Freebeard! It's hard to tell exactly where the external lines are going into the MGR, but I can look for that kit...

[pearl62]

Can you possibly share some basic dimensions of the MGR, length, width, height, etc?

I have made arrangements to get new batteries, and so now the floorplanning will begin, and I'd like to start thinking of how the MGR might fit in with my new pack...

[e*clipse]

Originally Posted by pearl62

Can you possibly share some basic dimensions of the MGR, length, width, height, etc?

I have made arrangements to get new batteries, and so now the floorplanning will begin, and I'd like to start thinking of how the MGR might fit in with my new pack...

Length: (from rear - output - bolt surface to front bolt center) 405mm
Length from output flange center to rear bolt surface: 100mm
Width: measured from output flange > output flange 272mm

Approxomite dimensions, because of it's lumpy organic shape:
Overall height: 290mm
Overall length: 420mm
Overall width: 325mm

Weight: 40.9kg; 90.2lbs (dry)
rated output torque ( of motor ) 130N-m

What new batteries are you using?
What's the output torque/power of your front motor?

- E*clipse

[pearl62]

Thanks, that was quick!!

The front motor is a Netgain Warp9, controlled by an EVNetics Soliton1. The combination is good for 170V (motor limit) and 1000A (controller limit, but near the motor limit too). So, ~170kW, or 234hp, or maybe 200hp at the wheels. With the current 170V pack I am only seeing ~130-140kW due to IR drop. The new pack will be much higher voltage at ~310V, so much less IR drop, and less pack heating, but also full power all the time . The new pack should be 150-200lbs lighter too, bringing the car down to ~2800lbs.

I am going with Enerdel CE175-360 cells, in a 6P arrangement up to 76S. It depends how much I can fit in...

[freebeard]

At Permalink 239 there are pictures of the stock subframe. In the rear there are two horizontal bolts and a (~4") round rubber mount and in the front, on a higher plane, two vertical bolts bolt solidly to a crossbar with two vertical rubber mounts 12-14" apart.

I have the MGR and subframe but I'm still short the crossbar and front mounts. Try to get a package deal where you get to decide how much gets salvaged.

OTOH they were $2500 new on eBay. Motor mounts aren't that big a deal.

OTOH the whole MGR, subframe and suspension could be a bolt-in package.

[e*clipse]

Originally Posted by pearl62

Thanks, that was quick!!

The front motor is a Netgain Warp9, controlled by an EVNetics Soliton1. The combination is good for 170V (motor limit) and 1000A (controller limit, but near the motor limit too). So, ~170kW, or 234hp, or maybe 200hp at the wheels. With the current 170V pack I am only seeing ~130-140kW due to IR drop. The new pack will be much higher voltage at ~310V, so much less IR drop, and less pack heating, but also full power all the time . The new pack should be 150-200lbs lighter too, bringing the car down to ~2800lbs.

I am going with Enerdel CE175-360 cells, in a 6P arrangement up to 76S. It depends how much I can fit in...

Those Enerdel cells have some impressive specs. I remember seeing something like 15C discharge capability for 10S (fine for automotive use) Their new spec sheet shows well over 20C!!

I'm not sure what your controller can handle, but unless you're using a voltage booster, the 76S arrangement won't provide enough voltage for the MGR. Given the cell's pulse power cabability, could you re-arrange things a bit for 3P and 156S? That could provide about 1000A, and 561V nominal.

How do you plan to connect the tabs and make a pack out of them?
Do you have a ***cough*** cheaper than retail source?

- E*clipse