Advice needed on losi 8ight T conversion

[glassdoctor]

Being in the UK might make the choice of motor/esc different. You might have different options that are more cost effective... what is cheap to us might be for you. For example, you might be able to run Mtroniks stuff cheap?

In general it won't be hard to get a nice conversion to run 25 minutes. Especially if you run a high-end motor. Lehner, Plettenberg, Neu...

A good lipo with at least 5000 mah will be enough if you don't go crazy on the motor choice. 40mph is pretty fast, so you might need 6000mah+

Firstly thank you both for the replies, I now have a much better idea on what I should be looking for. I checked that thread about run times but at the minute I am still a bit confused by this as some of the run times were 7 minutes and some were over 40 so I will have to try and look up the different setups.

This will be my spare 8T that I am converting so it will be for practise and I hope to also get some track time in with it. So is the pinion size dictated by the performance vs over heating rather than which pinion will fit? Also as I am in the UK and most of time it's cold will this mean I will not have to worry as much about overheating or does the ambient tempreture not have much influence? The other thing to do with this is how water proof / water resistant are brushless set-ups? I sometimes race in wet conditions so I was wondering if this will be a serious issue.

I filled in the speed calculator as accuratly as I could to go 45MPH and I think it reccomended the Neu 1521/1y/F brushless motor ( http://www.rc-monster.com/proddetail...15211yf&cat=20 ) . Are these good motors and what are they like on power drainage? If it will run the battery down quickly then I will need to comprimise between power and run time as 25 minutes is about what I will need (ideally 45 minutes as this would allow me to run a full raceday without having to recharge the batteries) .

I have also been looking on the rc-monster site for li-po's and the largest capacity individual battery I could find was this PolyQuest 4s 6000mah 20c Lipo, does anyone have any information about the quality of this battery? I was looking at the MaxAmps Lipoly 8000mah 2S2P 7.4V Pack and was wondering if I would be able to connect 2 packs together so I got 14.8V and 8000mah? If so how would I mount this in the truggy, would I need two battery trays?

The ESC is the part I am compleatly confused about. I cannot really tell the difference between the different ones other than the price. Please could you tell me what things I need to look out for so I can decide which one would suit my setup the best? If I plan on using the mechanical brakes and steering will this come off my main battery or would I be better to run this system independantly from a different reciever battery? I have been looking at BECs and have seen how some ESCs say they have built built in BECs but I am still not too sure about this.

I have been looking at the RC Monster Brushless Motor Mount - Losi 8 and saw that it says Requires modification of the stock radio tray. Now allows use of mechanical brakes if desired - must use front brake cam/actuator to actuate above spur gear. Servo for mechanical rear brake must be planned and gearing will have limitations when using mechanical brakes. Will this be difficult to set-up or will it be better than relying on the motor for brakes?

Lastly the other thing that has been on my mind is the charger required. At the minute I have a Pro-peak sigma charger ( http://www.ripmax.com/item.asp?itemid=O-IP2850 ). Will this be sufficient for the high power li-pos I would need? I read that some li-pos need a charger that can recognise the number of cells and I am not sure if my charger does this? When you charge a li-po you have to select the voltage so is this all I need?

Thanks again for the help and sorry for the amount of questions but there is a lot I need to learn before I buy a brushless set-up as it's expencive I want to make the right decision the first time.