[MalcolmB]

Hi Jordy
It looks like the newer, upgraded Warp 9 motor might fit your needs IF you're comfortable with pushing it close to the limits. It should produce around 200 ftlbs of torque at 1000A, but obviously not for very long. I'd suggest getting advice from someone who has experience of running these motors close to the edge.

[skooler]

Hi, Nice Project

Being in the UK it'd make sense to plan to use parts available from within
the EU.

The kostov 9" motors are apparently very good and rated for higher voltage when compared to the warp motors. I dont really see the need to go 11" as most of the power needed in hill climbing is for a very short period.

Headway batteries as already mentioned as they can push out 10C+, again you dont need the range so these make sense. Go for the highest voltage your controller will accept. Eclipse bikes is a UK supplier.
http://eclipsebikes.com/lifepo4-batt...221596a16062cf

As for a controller, I really reccomend Evnetics controllers. They will go higher voltage than most so you can have the same power output for less battery amps. There not the cheapest but by far the best quality. Nothing but good words for them. I bourght mine from rebbl (below)
http://www.rebbl.nl/

I honestly think a kostov 9, Soliton Jr (yes only 600A but goes up to 350V) and a decent size headway pack (say 95s5p of 10AH) will make that thing fly!

Looking forward to this one

Cheers

Mike

[Batterypoweredtoad]

I second what Mike said with the possible suggestion of using one of the more volatile Lithium chemistry batteries. They have higher power per weight but sacrifice range and cycle life.

I would ask Tessarect first, but cooling the Soliton Jr with an ice reservoir loop might be perfect for your situation to keep the 660 amps all the way up the hill.

Just curious: are you planning on using a transmission? All the calculations change if you are not.

[MalcolmB]

Jordy mentioned a Sierra diff, so I'm assuming no gearbox. The Jedi normally has a motorcycle engine/gearbox and chain drive diff.

The Soliton Jr/Kostov 9 combo would certainly give sprightly performance in a car as light as this, but with a single ratio I doubt it will meet both the acceleration and top speed requirements. I suggested the Warp 9 because it's known to handle higher currents. I think Plamenator said the Kostov 10 was designed as a direct competitor to the Warp 9; they weigh about the same, but the Kostov has interpoles for higher voltage, which make it slightly chunkier.

[skooler]

Originally Posted by MalcolmB

Jordy mentioned a Sierra diff, so I'm assuming no gearbox. The Jedi normally has a motorcycle engine/gearbox and chain drive diff.

The Soliton Jr/Kostov 9 combo would certainly give sprightly performance in a car as light as this, but with a single ratio I doubt it will meet both the acceleration and top speed requirements. I suggested the Warp 9 because it's known to handle higher currents. I think Plamenator said the Kostov 10 was designed as a direct competitor to the Warp 9; they weigh about the same, but the Kostov has interpoles for higher voltage, which make it slightly chunkier.

ah if its direct to diff then that changes everything!

Perhaps he could use a small lightweigh gearbox to get the right ratios? should add no more than 30KG?

[Batterypoweredtoad]

The packaging looks interesting to say the least.

[Yabert]

With high performance/short time application and direct drive in mind, I would suggest:

Kostov Alpha + 1000 to 1400A controller + 90S 2P (16Ah) of headway 38120HP

Motor and controller will give masive torque (380-500 Nm) and don't suffer that much for a minute race and the 60 Kg of battery will give a good power (90-110 Kw).

A123 AMP20 or Turnigy Nano-Tech can also be a very good battery choice (simply more complex to assemble).

[skooler]

trying to think of other ways to do this, seing the layout makes me realise how small it is!

Just to throw a slightly odddifferent option out. what about using a variator from a large scooter or motorbike?

[Jordysport]

Hi Guys got some pictures on the way of one of my chassis's, but I will be having a new chassis made so it can be customized to my specs.

Originally Posted by MalcolmB

Hi Jordy
It looks like the newer, upgraded Warp 9 motor might fit your needs IF you're comfortable with pushing it close to the limits. It should produce around 200 ftlbs of torque at 1000A, but obviously not for very long. I'd suggest getting advice from someone who has experience of running these motors close to the edge.

Hi Malc,

Looking at the Warp9 Vs Kostov after having a good look at my chassis i have about 14" of length from sprocket to edge of the chassis (1/2 inch of overhang) which makes the stumpy 14" kostov ideal. & with overhang in the open air with the fan on the end should give some nice cooling.

Originally Posted by skooler

Hi, Nice Project

Being in the UK it'd make sense to plan to use parts available from within
the EU.
The kostov 9" motors are apparently very good and rated for higher voltage when compared to the warp motors. I dont really see the need to go 11" as most of the power needed in hill climbing is for a very short period.
Headway batteries as already mentioned as they can push out 10C+, again you dont need the range so these make sense. Go for the highest voltage your controller will accept. Eclipse bikes is a UK supplier.
http://eclipsebikes.com/lifepo4-batt...221596a16062cf

As for a controller, I really reccomend Evnetics controllers. They will go higher voltage than most so you can have the same power output for less battery amps. There not the cheapest but by far the best quality. Nothing but good words for them. I bourght mine from rebbl (below)
http://www.rebbl.nl/

I honestly think a kostov 9, Soliton Jr (yes only 600A but goes up to 350V) and a decent size headway pack (say 95s5p of 10AH) will make that thing fly!
Looking forward to this one
Cheers
Mike

Hi Mike,

I Don't have an issue with international purchases as i have contacts so thats no big issue i would prefer to get the top compnents rather than be restricted by delivery & locations.

As for the 11" compared with the 9 Inch an 11 inch will fit in there nicely with the top chassis rail being raised slightly in that area by 2.5 inches but again i am not worried about that.

The plan is to have it transversly mounted with chain drive (geared) direct to the mini diff. so i have a range of sprockets i can use (10-15 front) & (34-40 rear)

And what i like about the Kostov motor is the rpm limit of 6800 rpm makes it a bit easier with direct drive No?

Yes Hillclimbing is very short, 40seconds generally for a 1000cc Jedi, but remember its very unlikley you will be on full throttle for very long, Lookup Wiscombe Hill climb, there are only two places you will be on full throttle for more than 5 seconds.

Headway cells.... thoughts on these??? are they "deadways"? bang for buck they seem pretty good. and re supplier i can get good discount going direct.

Kostov 9" & 300V & 600A (Soliton Jr) would be good, the question is would it be less strain on the components than say 220V & 1000A but still produce the same "Umph"

Originally Posted by Batterypoweredtoad

I second what Mike said with the possible suggestion of using one of the more volatile Lithium chemistry batteries. They have higher power per weight but sacrifice range and cycle life.

I would ask Tessarect first, but cooling the Soliton Jr with an ice reservoir loop might be perfect for your situation to keep the 660 amps all the way up the hill.

Just curious: are you planning on using a transmission? All the calculations change if you are not.

The Cylindrical Cells is deffo the way forward for me with limited space and various combinations of arrangements of cells makes it highly advantageous along with the High C ratings.

Re cooling i can have a mini rad & water cooling for it no probs, I was planning on putting the controller under the seat with a rad against the side of the chassis with a cut out & obviously the rad angled slightly to get the air flow.

Direct Drive with gear reduction.

Originally Posted by MalcolmB

Jordy mentioned a Sierra diff, so I'm assuming no gearbox. The Jedi normally has a motorcycle engine/gearbox and chain drive diff.

The Soliton Jr/Kostov 9 combo would certainly give sprightly performance in a car as light as this, but with a single ratio I doubt it will meet both the acceleration and top speed requirements. I suggested the Warp 9 because it's known to handle higher currents. I think Plamenator said the Kostov 10 was designed as a direct competitor to the Warp 9; they weigh about the same, but the Kostov has interpoles for higher voltage, which make it slightly chunkier.

Originally Posted by skooler

ah if its direct to diff then that changes everything!

Perhaps he could use a small lightweigh gearbox to get the right ratios? should add no more than 30KG?

No a gearbox is not possible in the space,

Originally Posted by Batterypoweredtoad

The packaging looks interesting to say the least.

Yes its compact, see my pics of my chassis with nothing in (ignore the central bars their just engine mounts which wont be there on the new chassis.

Originally Posted by Yabert

With high performance/short time application and direct drive in mind, I would suggest:

Kostov Alpha + 1000 to 1400A controller + 90S 2P (16Ah) of headway 38120HP

Motor and controller will give masive torque (380-500 Nm) and don't suffer that much for a minute race and the 60 Kg of battery will give a good power (90-110 Kw).

A123 AMP20 or Turnigy Nano-Tech can also be a very good battery choice (simply more complex to assemble).

Kostov Alpha is an 11" motor but thats not a problem as mentioned above, the question is.. is it sufficiently better than the 9" to warrent the minor chassis mods. and yes that sort of power would be very nice.

[skooler]

The Evnetics controllers will hapily convert volts to amps but not the other way around - So higher voltage is typicaly better..

Kostov 9" & 300V & 600A (Soliton Jr) would be good, the question is would it be less strain on the components than say 220V & 1000A but still produce the same "Umph"

Power is power, the difference between the two is how much torque is applied. 600A should be about 150ft lbs (from 0RPM dont forget!) I dont think you could actually put the power down if you went higher, my RX8 with a Soliton Jr has problems putting the power down if I floor it.

I think 600Amps will provide oozles of torque for your application. going higher voltage means you can get the RPMs all the way up to the Kostovs limit. 340ish volts on the proposed headway pack may sag by a third at full current, so you still have all the volts you need for the motor.

yabert has an excellent smart conversion using headway cells.



Is there any way at all you could get some form of transmission/gearing in there?

What do you think about the variator idea? too weak?