Tesla P3D More Power!

1667 Views 9 Replies 5 Participants Last post by Duncan, Jun 6, 2020

Bowser330

Discussion Starter · May 28, 2020

Long time member here, I remember back when Mate Rimac was just one of us and not an EV Supercar CEO.

I always have and still want to work on a DIY EV project but was taken by the performance and value of the model 3 performance, so i bought one.

However I would like to get this community's opinions, advice and guidance on increasing the performance of the P3D.

I had a few ideas and once you deem me crazy I would be interested to hear new ideas from you all.

(1) install an independently powered and controlled 3rd motor (Tesla model s front motor) on to a 5th wheel that would make contact to the road under/within the rear trunk.

(2) install an independently powered and controlled 3rd motor (Tesla model s front motor) to the rear of the model 3 and connect the inner cv axles of the oem rear motor and 3rd motor with a belt or chain, on both sides of course, to couple the oem rear motor and 3rd motor together.

(3) install hub motors at the output of the tesla oem motor gearbox and get custom shorter cv shafts made.

I do realize that all the options represent a lot of work and would require material amounts of customization, i guess i am wondering if they are even possible from an engineering and reliability perspective.

Is there another more obvious option I am missing?

Advice?

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Duncan

· #2 · May 28, 2020

Bowser330 said:
Long time member here, I remember back when Mate Rimac was just one of us and not an EV Supercar CEO.

I always have and still want to work on a DIY EV project but was taken by the performance and value of the model 3 performance, so i bought one.

However I would like to get this community's opinions, advice and guidance on increasing the performance of the P3D.

I had a few ideas and once you deem me crazy I would be interested to hear new ideas from you all.

(1) install an independently powered and controlled 3rd motor (Tesla model s front motor) on to a 5th wheel that would make contact to the road under/within the rear trunk.

(2) install an independently powered and controlled 3rd motor (Tesla model s front motor) to the rear of the model 3 and connect the inner cv axles of the oem rear motor and 3rd motor with a belt or chain, on both sides of course, to couple the oem rear motor and 3rd motor together.

(3) install hub motors at the output of the tesla oem motor gearbox and get custom shorter cv shafts made.

I do realize that all the options represent a lot of work and would require material amounts of customization, i guess i am wondering if they are even possible from an engineering and reliability perspective.

Is there another more obvious option I am missing?

Advice?

Those options would ALL result in REDUCED performance
The main limiting factor is the ability of the tyre/road interface to transmit power to the ground and those options all make that WORSE

I would suggest instead
(1) Reduce weight - there is a lot of luxury in a model 3 - all of which can go
(2) Improve suspension/brakes
(3) This is the expensive one - you need to "hack" the software and increase the power
The Tesla is operating on a compromise because it expects 200,000 miles with no failures
If you are willing to accept a greater chance of failure (which is what "tuning is all about" THEN you should be able to stretch the power a good bit

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Duncan

· #4 · May 29, 2020

Power at the wheels is additive - however your extra wheel will need to push against the ground if it is to transfer any power to the tarmac
And that load will come OFF the load the road wheels are carrying - which means that they will not be able to put as much power to the road

So you will add power from your extra wheel and LOSE power from the main wheels

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Duncan

· #6 · May 29, 2020

Hub motors will almost certainly result in LESS power delivered to the tarmac

You may have more power but the additional unsprung weight will ruin the performance of your suspension and as a result you will end up delivering LESS power

Remember that a performance model Tesla is already delivering MORE power to the tarmac than was thought to be possible just ten years ago

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Duncan

· #10 · Jun 6, 2020

Re altering the gear ratio

It may not help you!
Once you have enough torque to spin the wheels then more is not useful

I'm pretty sure that a Model 3 performance already has enough torque to spin the wheels and that it uses its software to control that torque

Sticky "race" tyres will give more performance improvement than that

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