Mazda MX-5e Tesla Powered

Mazda MX-5e Tesla Powered

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snotrag

14,464 posts

211 months

Thursday 6th April 2023
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NB dash is pretty much a straight swap if you fancied an easy change just as something to mix it up.

NDNDNDND

2,022 posts

183 months

Thursday 6th April 2023
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Merry said:
snotrag said:
The infamous 'depowered PAS rack' is similarly awful, generally used 'bEcoz RaceKar!" by people who think not having power steering is cool. Despited the fact the car drives better with it, on road and track.
We did that with our Mx5 track car. It was better depowered, on a track at least.

Could be a personal preference thing and can totally see why you'd avoid the complexity with this build.
Me too. I hated the hydraulic PAS on my mk1 - couldn't feel a thing. After a few frustrated track days I considered selling the car but couldn't work out what to replace it with. A chance drive in a Ma5da race car, back to back with a HPAS and unassisted car confirmed for me that the hydraulic rack is the worst option. The amount of feel and confidence offered by the unassisted racks was leagues over the HPAS. My car now runs a 'flyin miata'-style depowered rack. With the standard steering wheel and castor angle kept below 5° the steering weight is perfectly fine and you can actually feel how much grip you have at the front tyres.

If you're going for simplicity, why faff about with Bosch iBoost? There are off-the-shelf unservo'd brake kits available.

Edited by NDNDNDND on Thursday 6th April 22:25

TheLoraxxZeus

292 posts

19 months

Friday 7th April 2023
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J4CKO said:
295 bhp in an MX5 will be fun, just a different kind of fun than the usual shagged out 1.6 twincam.
Fun for 0.01% of drivers. Will be completely unusable for most people because they are used to a lead foot and every electronic safety system known to man spec'd to the vehicle.


Cool project, but 295bhp in an MX5 is actually pretty scared, especially if it's from a turbo. Perhaps it being electric the linear powerband is less likely to turn your pants brown.

shalmaneser

5,935 posts

195 months

Friday 7th April 2023
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robcollingridge said:
Our plan A is to do something radical and build a custom dash and this is what we will be exploring in the coming weeks. We can reuse the metal support frame.
This seems a bit like scope creep? Isn't there enough to keep you busy?

TGCOTF-dewey

5,163 posts

55 months

Friday 7th April 2023
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TheLoraxxZeus said:
Fun for 0.01% of drivers. Will be completely unusable for most people because they are used to a lead foot and every electronic safety system known to man spec'd to the vehicle.


Cool project, but 295bhp in an MX5 is actually pretty scared, especially if it's from a turbo. Perhaps it being electric the linear powerband is less likely to turn your pants brown.
That's the beauty of an e-motor though.

On my Son's electric trials bike you can independently control: power, power curve, and max speed limit.

So it can be low power with soft power delivery, or instant full torque for gravity defying stuff.

hairy v

1,203 posts

144 months

Friday 7th April 2023
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Great project OP, what sort of range are you anticipating for normal driving?

robcollingridge

Original Poster:

610 posts

283 months

Friday 7th April 2023
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shalmaneser said:
This seems a bit like scope creep? Isn't there enough to keep you busy?
Yes, it is really. It's not a huge thing but, I was interested to see what worked as it may make it easier to mount the 10" infotainment system and HUD.

Rob

robcollingridge

Original Poster:

610 posts

283 months

Friday 7th April 2023
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hairy v said:
Great project OP, what sort of range are you anticipating for normal driving?
About 120 miles. It's a compromise between weight and range basically. We want our MX-5e to be lighter than the Eunos we started with.

Rob

robcollingridge

Original Poster:

610 posts

283 months

Friday 7th April 2023
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NDNDNDND said:
Me too. I hated the hydraulic PAS on my mk1 - couldn't feel a thing. After a few frustrated track days I considered selling the car but couldn't work out what to replace it with. A chance drive in a Ma5da race car, back to back with a HPAS and unassisted car confirmed for me that the hydraulic rack is the worst option. The amount of feel and confidence offered by the unassisted racks was leagues over the HPAS. My car now runs a 'flyin miata'-style depowered rack. With the standard steering wheel and castor angle kept below 5° the steering weight is perfectly fine and you can actually feel how much grip you have at the front tyres.

If you're going for simplicity, why faff about with Bosch iBoost? There are off-the-shelf unservo'd brake kits available.

Edited by NDNDNDND on Thursday 6th April 22:25
Yes, we were planing to do the Flyin Miata modification to improve the feel. The car will be light enough not to need power steering and in my 450kg Fisher Fury R1, there was definitely no need for it.

The iBoost is because of the programmable regenerative braking. We want the iBoost to have a few different driving profiles and this will allow control of the character based on selected mode.

This MX-5e is a test platform for a scratch build.

Rob

robcollingridge

Original Poster:

610 posts

283 months

Saturday 8th April 2023
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We had to remove the camshaft cover in the MX-5e as the gasket was leaking oil everywhere. Whilst the cover was off, we took the opportunity to clean it all up and paint it. It will now be installed in Yoko (my son's 1990 Eunos Roadster 1.6) and we will put Yoko's cover back in the MX-5e. We are looking after the engine because it will probably be transplanted into Yoko at some future date. This one has done about 80,000 miles and Yoko's has done 140,000+.


robcollingridge

Original Poster:

610 posts

283 months

Saturday 8th April 2023
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Our plan A is to use the metal frame inside the Eunos dash as the basis of a new custom, modern dash. We have separated it from the plastic part and taken an angle grinder to it, to remove the unwanted brackets. It had lots of surface rust as Mazda don't treat this part of the car at all and it gets exposed to some damp inside the car. It is now cleaned up and painted, ready for our experiments :-)


robcollingridge

Original Poster:

610 posts

283 months

Sunday 9th April 2023
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Busy day today! We have completely stripped out the interior now, including the 2.2kg of sound deadening material on the front bulkhead. Every little bit counts :-)

We then started the rebuild, with a new black carpet and new black interior trim. We have also stripped the rear end to look for any rust but found none, which is nice.



Rob

robcollingridge

Original Poster:

610 posts

283 months

Wednesday 12th April 2023
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Swapped the painted cam shaft cover into Yoko (my son's 1990 Eunos Roadster) and put his old one back into the MX-5e. We are very close to getting it back up and running again. Having completely stripped the interior and dash out, what are the chances of it starting first time? :-)


robcollingridge

Original Poster:

610 posts

283 months

Wednesday 19th April 2023
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Cleaned up the front uprights, brake dust shields and fitted new track rod ends.



Removing the wings, treating any rust and will then underseal behind the wheel arch covers.

robcollingridge

Original Poster:

610 posts

283 months

Wednesday 26th April 2023
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Brake calipers arrived in the post today, back from Bigg Red. These have been rebuilt as new and painted gold.

robcollingridge

Original Poster:

610 posts

283 months

Tuesday 2nd May 2023
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The new interior in black is now complete bar the seats. Gold details match the subtle details on the outside.


Alex Z

1,130 posts

76 months

Tuesday 2nd May 2023
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Very nice. Looking forward to seeing the end result.

TameRacingDriver

18,091 posts

272 months

Tuesday 2nd May 2023
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Looks great OP smile Not into EVs but its hard not to like what you're doing with this!

drgoatboy

1,626 posts

207 months

Tuesday 2nd May 2023
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Very interesting, thanks for sharing

robcollingridge

Original Poster:

610 posts

283 months

Monday 8th May 2023
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The new MeisterR coil overs arrived