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Post by kiwiev on Mar 4, 2015 5:23:28 GMT
and another one getting a bit sideways
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Post by kiwiev on Mar 4, 2015 6:27:26 GMT
Hi need some help how is everyone fixing their dash to the chassis? Cheers Conrad
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Post by mawdo81 on Mar 4, 2015 12:34:45 GMT
Love the orange conduit! Do you know the heat rating and where you sourced it from please?
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Post by Stiggy on Mar 4, 2015 13:29:38 GMT
I used to bolt the dash at each end underside to the side panels. You need need a little trim to get the dash pushed closer to the column rail.
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Post by kiwiev on Mar 4, 2015 22:45:26 GMT
Hi Mawdo
the orange conduit came from eBay in Australia just your normal industrial rating had to have orange for hi volt cables for Australian standard.
not that exspensive about a $1 a meter.
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Post by kiwiev on Apr 6, 2015 9:05:32 GMT
Hi everyone It's been a while trailered the car up to motor engineer prior to putting body on. A few things to fix seat backs were 40mm short GPS Speedo not ADR approved Split pins in 4 point harness Have foam pad passenger side of dash Change dash indicator lights to green with arrows
He loved it had a Porches GT3 there beat it from 0 to 160 km
So very happy
Not looking forward to putting body on trying to rebolt suspension thru pannel holes there isn't much room
Are there any tricks to this?
Cheers Conrad
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Post by jacksdad on Apr 14, 2015 20:41:06 GMT
Hi KiwiEV
My son and I are currently building a rocket and we are thinking of going Electric however we are new to all things EV and although i am trying to climb the learning curve and i've read Stuarts book and i've been doing some online research, i'm thinking that your setup would probably work well for the rocket i wondered if you could share some technical specs of your EV setup :
- what batteries are you using they look like lithium but how many what size and weight are they how are they connected and what is the total AH and Voltage the peak current and peak KW and how have you used this to predict acceleration -did you work out a rolling resistance,air resistance and Wh/mile figure for the sonic -Why did you choose the motor you chose i have found a uk distributor for the same one but its pricey £4K ish -What sort of controller are you using, me and the lad are into electronics and wondered about building our own controller we have built motor controllers for simple project based around the atmega in an arduino but although i think it could save us some cash it maybe a bit beyond us and could be waste of time does your controller learn the environment of the motor does it have programmable parameters ? -wa have the same rear uprights as you although we currently have a IB5 gearbox and drive shafts it seem generally accepted that its a bit of a waste of time using the gearbox and your Diff solution looks good what shafts did you use did they fit into the RTR hub splines etc etc. -the rocket we have has engine mounts ready for the zetec and i think i'd like to keep these as i don't want to ruin the powder coat and would allow for an engine fit later if we wanted, i guess it v improtant to fit the motor and Diff properly in the car i assume the main forces are it's weight and a large rotational torque did you engineer the mountings specifically for your motor or diff do you have any idea of the forces etc. -did you use the same brake pedal box and willwood masters that rtr sold if so i guess you just took of the clutch pedel did you work out a specific front rear balence for the brakes i assume based around your battery weight distribution ??
ummmm thats all i can think of for now we are still undecided what way to go i guess if we could get around 100-150 miles and 70 mph top speed and awesome sub 4s acceleration this might swing it for us, i think we may need to work on the rocket aerodynamics a bit though
THanks v much for you help in anticipation
All the best
Jacksdad
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Post by kiwiev on Apr 15, 2015 11:02:27 GMT
Hi Jack
batteries are Winston lipo 3.2 160 Ah battery weight about 5.5 Kg each I have 46 wired in series to give me around 152 volts.
so this gives me a pack of 23.5 Kwh
I can draw 1100 amps off these so in a perfect world 167kw of power.
as far as predicting acceleration times 1-60 mph times i use a calculator online I cant remember what one i just googled.
But in real life if tires are cold its 3.6 to 3.8 seconds when they are warm 3.2 not bad almost super car times does 180 kph top speed. my range depends on how you drive it but i have had 200 km but if you give it 160 km.
i chose the HPEV Ac x 35 because it was AC has an easy reverse and regen function i can regen up to 450 amps back into battery pack, if i went DC yes cheaper but heavier hard to reverse unless you use big contactors and no regen.
Try EV west in the states talk to Micheal Bream great guy and helpful. the motor came with 2 curtis controllers same as they use in heavy electric forklifts etc. they have a specific program software that they load for acceleration rates and operating parameters.
if you could couple to a ford gearbox it would make it easier to use original motor mounts and drive shafts mine cost $1100 aus one end is ford the other end is BMW E-30. the other thing i would do is try to house your batteries in aluminum lift out boxes and maybe go 100 Ah batteries they weight 3.5 Kg and you really only need 45 of them. DC you need more batteries to get same power.
I'm a Mechanical Engineer so working out forces to mount motor and Diff wasn't hard.
I took out clutch pedal and the brake is a balance twin master not quite a RTR thou, still trying to get brakes balanced because of Regen the rear tends to over take the front if I brake hard ie. 70 Kph to 0 kph in 10 meters on my drive way that's for real too.
PM me if you want my email happy to answer more also check EVWEST on you tube
cheers Conrad
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Post by jacksdad on Apr 15, 2015 14:13:16 GMT
Hi Conrad
That really helpful may well just go with your setup as its proven, did you have to get the drive shafts made ?? Will talk to the EV west guy and the Uk distributer try and get some costings, will certainly email you for some more details if we go ahead cheers
Jon
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Post by jacksdad on Apr 18, 2015 22:18:34 GMT
Hi Conrad I've just posted in the rocket forum but not sure if u r looking there did u ever consider the mevabusa diff and a chain drive wondered if this may have been cheeper than your merc diff ??
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Post by kiwiev on Apr 19, 2015 3:23:06 GMT
Hi Jon I just posted in your E rocket thread. I wish I had a gearbox some times it was a bugger finding diff ratios .
A gearbox will give you more option . But I still love the acceleration of the Sonic it's like taking off in a jet plane
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Post by kiwiev on Apr 22, 2015 10:57:41 GMT
so i got my car hoist set up best thing i ever bought for the garage.
I removed the outer wheel hub on the fronts and the rear uprights, i cut the holes in the body panels for the suspension to slip thru one hole for the bottom arm and one for the top this way I didn't need to try and get my hands in side to get it back together. And removed mud guard stays to fiber glass guards on see below photos
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Post by kiwiev on Apr 22, 2015 10:59:30 GMT
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Post by kiwiev on Apr 22, 2015 11:00:40 GMT
I welded bolts on end of stays and blob at the other end to give the resin and fiberglass something to stick to
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Post by kiwiev on Apr 22, 2015 11:01:46 GMT
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