I am in the process of converting my TT MT A4 0.28 engine to electric  using the following set up :

1) Leopard Motors LBP 4274/2000 KV ( http://www.leopardhobby.com/product/product_veiws.asp?id=1344&functionID=01020220 )
2)Leopard 150 amp ESC   ( http://www.leopardhobby.com/product/product_veiws.asp?id=1369&functionID=01020501 )
3) battery 14.8 V 35 C 3700 mah Hard case lipo .

I used the same car with the 0.28 engine earlier , being an electric fan I decided to change it .

Here are image of the car with the engine  and now with the motor  

Great conversion! But, can I point out that your LiPo is not gonna supply enough for the motor..
What conversion are you using?

Great to see a plane guy going car

Thanks

35 C X 3.7 A = 129.5 AMPS

The Motor consumption at 14.8 V is below 100 amps .

Hence I think if my calcualations are right it should last around 5-7 mins at full throttle.

Sai

Yeah but it may lead to ballooning of the cells.. But hey, you're the expert on LiPos 

Mr.Sai,I think you should move up to 5000 mah batteries.As Divyam has said,you will be risking your lipos.Is there a chance you will be carrying leopard motors here?

PS:Happy to see another guy getting into cars.

yes i will be carrying leopard motors  in the near future .
actually this conversion was to  try them out.
I also have an out runner to try out on one of my FPV Planes .

Well as for the batteries those were the ones I had  with me .
I am still to try and see if 4 S is ok or if I should move up to 5S or may be even 6 S as this motor is rated upto 6 S.
Tried it out now and found the conversion per say has worked out .

My only concern in moving to higher voltage is that the engine 0.28 Practical R.P.M.(R.P.M.)    3,000 ~ 35,000 rpm
Output(BHP/RPM)    2.40 BHP / 30,000 RPM  .
Hence with 4S  max voltage being 16.8 V x 2000 KV = 33600 rpm which is about close to the max practical RPM of the engine. Thus I really don't want to push the gear box beyond the max operating rpm  the engine would have provided .

On 5 S the RPM at max voltage will  we around 42000 rpm , I guess this should not affect the gear box much but just in case.

Sai

Nice Conversion! Could you put up some more pics please?

5s would be too much.I would suggest you stay with 4s.

How did you make the motor mount? The pics are not clear.

Even i am inquisitive for the mount.
BTW i dont think RPM of any range below 45-50 thousand can harm the truck.
You need to change the gears to metal though since this is a S28 and not a S50