B4 gearing / racing / general advice

[Redkite]

hello,

Its my first post - I have been a forum lurker for a while !

I have bought a couple of old B4s to try and get back into racing after 20 years absence...

I am using the electrics that came with the buggies- brushed motors and nimh batteries. Can I use LIPO with a brushed speedo / motor - will it make a difference vs nimhs? I am trying to keep costs down at the present... I will upgrade to a brushless system eventually.

Can someone suggest a good ratio - got a whole load of pinions / spur gears to play with !

Also I would love to do some racing however I fear I will be totally rubbish - are many races run stock these days - what would be considered a stock set up now?

thanks all

paul