Advice needed on losi 8ight T conversion

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.