GT40E Build History.
September 3 2021 Week 2
ordered drive shaft stump from
Zero-ev, in the UK as my Tesla motor did not come with the drive cups.
visited Sam Rossi, who will be my engineer overseeing the build. I was in the
process of makeing a Glass RSJ to hold the batteries down. I would make one and
hang some weights on it to test its ability to do the job. Sam put the
dimentions throught his computer and came up with a figure well short of the
requirement, but quickly stated that a 20 x 20 steel beam 1.6mm would do the
trick if wrapped in glass to insulate. Good advice to keep all recipts and
packing for lights and ensuring they comply with Australian Design Regulations
before purchase. Great to work with people who know their job.
installed the replacement power board in the Tesla after half a days work
eventually managed to get the motor turning - Backwards. So he went away to test
the power board on his motor in his workshop.
I set to work drilling holes in
the dashboard for the Speedo, Volt meter and clock, all in 1960's style. The
grinder got to work cutting out a hole fot the MoTeC display. As I have worked
with fibreglass since I was about 14 I feel quite confident getting stuck in
here. If you make a misteak you can always patch it up.
Finding various parts
appears to fill half my time. Lighs, switches, gas struts, and there will be far
August 24 2021 Week 1.
arrived on Friday the 20th and from now on rather
than me entering the date I will put the week of the build. I will exclude weeks
that I am away, like holidays. This will give an idea as to the time it takes me
to complete the build, excluding holidays.
The first job was to build a
trolley to mount the car so that I did not end up breaking my back working on
the car, I have a very stiff back anyway and the car can be moved around the garage it
has large wheels, all steerable. On opposite corners there are breaks, and the
other corner the wheels can be locked straight to help me steer, unlike a
shopping trolley. The car was lifted onto the table with he use of a couple of
gantries and 4 pulley blocks. It was a good thing that the GT40 has a hole in the
boot and bonnet to allow the chains to go down to the chassis. If you do it
yourself don't skimp on gear. The hire was not cheep but the car is expensive.
For those with sharp eyes will notice that I have done some fibreglass work on
the front right headlight. This is a light mould that will help me select some
headlights that will fit from a scrap yard.
Over the weekend there was a lot of measuring of the engine bay to calculate
the container dimensions for the batteries. I need to fit in 192 batteries. For
wiring sense containers should have batches of batteries devisable by 12. There
is also a big question. "Do I have spacing between the batteries to assist
The bottom line is that the 192 batteries could not be fitted
into the engine bay, even
without spacing, but the extras could be placed in the door sills. So the
decision to have spaces was made. Each battery will have a 10mm strip of hard
foam, 4.5mm thick, along the top and bottom of the battery allowing air to flow from front to
back of the box. Pictures will to come later. After much calculating, what I hope was
the ideal box dimensions was decided on. In addition the dimensions of the
copper plates to join the batteries together were drawn up and a friend of mine
in Sydney drew up the CAD design. (I have a free copy of Sketchup but it
can not work to finer than 1 mm. The diameter of a 5mm hole is 2.5mm!)
The control board arrived for the Tesla motor, supplied by Tim at EVWorks. This
replaces the Tesla that can not be used as access to its brains is not available
to non Tesla products.
In the mean time the MoTeC wiring system continues
with Great help from Glen. I have got to the stage of working on the display,
getting flash indicators, main beam etc. to display.
came on Thursday to help me replace the Tesla differential with the Quafe
Limited Slip Diff. There are good instructions on the
EVTV Motor Verks web site that are easy to follow.
We did the
replacement on the floor as I was concerned that the weight of the Tesla motor
would be too heavy for my work bench. It was probably better as in that position
it was easier to maneuver into position.
The pulling of the old bearings
needed a bit of "Aussie know how" (The ability to fix something when there is
not a perfect tool for the job.) So put your brain into gear and don't expect a
garage to do the job for you.
The only issue we had was lining all the
components up, on either side of the two castings. My suggestion is that you
have half a dozen over length bolts to initially hold the casings together and
gradually align everything bit by bit. We also had a 5 minute gasket seal that
was used to seal the two halves of the motor together. You will not do the job
in 5 minutes.
Once the diff was replaced Tim replaced the Tesla power board
with an alternate version that fits in place beautifully, replacing the Tesla
board. The reason for the replacement is that Tesla will not allow you to have
access to the electronic drive brains of the system. The replacement will give
us that ability.
July 12 2021
Although the car has not left Phillip Island yet there is
some more progress with the aluminum body coming on. The Suspension is being
fitted as have the hydraulic jacks.
I have purchased some light switches off
EBay hoping that they would be easy to wire in to the harness, but as with all
things now they are designed to fit into a VW CANBus, Nobody is able to help so
I have ideas on how to progress see on my next post.
July 2 2021
With hopefully only a week before delivery I received
deliveries over the week of a number of light switches and break switches for
the car. In addition the electronic hand
break, that I hope will be legal, arrived from American. I did find that the
instructions were somewhat lacking. As when I went to set the stop and return
points of the liner motor, I had no idea how to send the actuator back to its
shorter position, having not fully understood the instructions. When you read
both the AutoLoc and American Shifter instructions to understand what is going
on. I worked out that 1 (Brown) to 8 White all work independently so you can set
the Brown 1 on the first press to release the break, on the second press actuate
the break. The remaining connections can all have separate functions. So I set a
function on 2 (Brown/Blue) to release the break. This is all test bench stuff
just to be sure that it works.
I also received delivery of two ECUMaster CAN
Switch boards. These will receive data 8 Switch and 8 Analog and send the data
to the MoTeC Display. In principle the CAN Switches will reduce the limited
number of wires going into the MoTeC units.
I spent a couple of days making
a CANBus to test bench some of the settings on the MoTeC and then had a few
hours with Glen
checking that things were in order for me to continue testing and learning. It
spins my brain out. It is great working with him, so patient with this amateur.
My weekly call with
Forties confirmed that, with no promises, the car should be ready for
shipping around the end of next week with the aluminum polished to sparkling,
with Purple Polish.
The motor is in the cage and the car is about ready to leave Philip Island.
Robert had a lot of issues fitting the body as the jig he had from the previous
owner of the business had built the jig based on a crashed car! All sorted and
the jig is ready for future clients.
In the mean time I have been learning
from both HP Academy and Glen of
Auto Sport Electronics had been very patient with me, whilst I learn how to
program my MoTeC electronics.
aluminum panels are being fitted to the chassis.
In the mean time I have
been on a wiring course run by
HP Academy. For those not already experts in wiring I recommend going through
this course. Very thorough and easy to follow.
Powder Coating May 2021
back from powder coating, satin black and floor fitted. Aluminum panels being
made and finished, Bodywork has been fitted. Suspension has been powder coated
in the same satin black and will be fitted as soon as the aluminum is completed.
Motor cradle needs to be manufactured.
Robert is spot on with his timing at
Limited Slip Differential, May 2021
As the Tesla has a straight forward differential and uses the breaks to
encourage even drive on the back two wheels. I needed a limited Slip
Differential. EVTV Motor Verks
in Missouri USA. You can buy the Quaife LSD from them. I found them very
efficient to deal with, giving me same day replies to my questions. Although I
found their freight costs very expensive. But I have a way around that as
follows. I have found many USA companies charge prohibitive freight costs
overseas so I use a freight forwarding company,
Stakry, who also allow
you to batch your purchases. I have an account with them and have used them for
many years. Again a very efficient company. Back to EVTV They have a very good
video on how to fit it to your Tesla S drive,
http://store.evtv.me/proddetail.php?prod=QuaifeATB it looks to be easy
enough, but from what I have seen before handle your Tesla motor with care.
were some traumas getting the engine to fit and but with Roberts persistence it
was eventually fitted in May.
In the mean time I needed to have a contact who would help me with the
Electrical side of the build. I believe I was fortunate in making contact with
Tim from EV Works in
Landsdale Western Australia. Tim supplies batteries for Electric Cars and gives
me good advice.
We decided, having seen a video on a
Evora Tesla build, to go for the
MoTeC display system.
At the same time we watched a very good
the Tesla motor by Professor John Kelly Webster State University. I would
recommend that anybody who is getting involved with a Tesla motor look at the
video. This changed our thinking on converting the motor from East West to North
Shortly after the opening
changed hands with Robert Logan, who had previously built GT40s and also built
1960s F1 cars to the USA. I have to say that I felt a lot more confident with
Robert, particularly as we both knew making an Electric GT40 was not going to be
easy. Robert had to settle down bringing the manufacturing to Philip Island.
Waiting for COVID to allow progress.
Whilst the factory was closed there was little that we could do. However as I
like to plan ahead I started working on the colour scheme. A car like the GT40
needs to look good. It rarely comes in one colour as the Go Fast Stripe was a
regular feature that gave the car at least one additional colour. Details on how
I went ahead in this important part of the project can be seen on a separate
I went to the F1 in Melbourne Australia and on the Friday before practice my
daughter and I went to visit Roaring Forties who were, at that time located in
Melbourne. After a chat to the management and a sit in one of the cars and a
chat with an owner we did our tourist thing round Melbourne. The race had been
canceled due to COVID closing the event that morning. A week later I ordered the
Tesla motor from America, on EBay. Another week later, due to lockdown the
factory closed and did not open until November 2020.