Hi im building a track car with the aim of around 700+bhp, ive been attending track days and watching the action at some small race events at mallory park, especially the boxing day plumb pudding races. ive spoke to a couple of competitors and it is just for fun your not going to be the next big signing by martin whitmarsh for mclaren!! im going to apply for my license but was wondering how specc'd the car has to be safety wise to compete in like a tin tops kinda meet? the boxing day event had a mixture of anything from modded cossies against early shaped minis, a jag xjs, porches and lotus 7's etc!!! i know you need fire extinguisher, batt cut off, fuel cut off, roll cage,harness', buckets etc but what has to be 'approoved' or within a certain date for this kind of racing? any help much appreciated please or even websites i could look at. thanks
talk to the organisers of the events

find out if the series is FIA/MSA approved. They probably will be. In this case you will need a CDS mandrel bent Rollcage. Each series will state different specs on the cage (how many points etc) thickness is sometimes specced too. you can't have some randomer doing the install either. you need someone who knows what they are doing
If it's FIA then you will need seats that are in date. Allot of rally guys get pissed at this because it's not like they go off if not kept in the firdge! but still
youll need internal and external eletrical and fuel cut offs and on the outside they need to be in a set place (usually passenger side and under the screen) stickers need to be under them and a certian size... fire extinguisher needs to be plumbed in and approved, it will need to have jets pointing in certain places. For the rally cars we usually put 2 at the driver, 2 at the passenger and 2 in the engine bay. but it depends on the regs for that series.
Like I say talk to the organisers of the event to work out what you need

but at the very least get the cage full FIA spec and installed properly (for safety if nothing else) the MSA regs book will help

this is a book full of specs for motorsport and shows you how to fit seats and harnesses properly.
It all sounds allot more complicated than it is! you'd be suprised how quickly you will know what you need

but you need the mentality of "I WILL do this right" You can't get away with bodges (they'll be picked up in scrutineering) and its not something to take on yourself if all you can do is make a "bangin sound system", wire up some LEDs and make a body kit

lol this isn't boy racer stuff for chavs, this is man style tuneing
if you want to talk to some people who can do all the work and help you with advice then i can put you in touch with the right people (certainly for the roll cage)