Guest vvega Posted December 4, 2007 Share Posted December 4, 2007 ok well there has been a little debate about this in the for sale section im at work so havent got time to jot it down....but most of you woudl have a good idea so basically(highly modified\) track only cars .... need ...... road cars (highly modified) a quick start the way the engine is prepared is considerably different..........why|???? the suspention is considerably different........why meh its not really a tech question....but i guess it will end up been a technical disscusion rather than my road car needs to do a phat skid boe........though this is very true Quote Link to comment Share on other sites More sharing options...
Snoozin Posted December 4, 2007 Share Posted December 4, 2007 Road cars need compromise (to be an effective road car anyway) and track cars can be built without compromise. Suspension wise, a road car will generally need to be a little more compliant, possibly even built stronger to deal with the wider range of surfaces and general shitty conditions. A balance between comfort and performance undoubtedly has to be met if you intend on using a car regularly on roads, especially on fast thrashes along winding backroads and stuff. Engine wise, much the same I would have thought... you can build a race engine to perform where you NEED it to perform, this being basically on the limit right? Who cares if you've got no bottom end torque etc, on a track you're able to keep the engine operating in it's powerband... whereas a road engine may need to be more flexible, once again to deal with a wider range of conditions that are presented to a roadgoing car. It all comes down to definition of a street car eh..... to me a street car is something that can be USED regularly, with little hassle. To me, a stripped interior doesn't constitute "street car" as well, but thats well open to personal opinion. Quote Link to comment Share on other sites More sharing options...
Unclejake Posted December 4, 2007 Share Posted December 4, 2007 In all honesty a fast race car is virtually undriveable on the road. Sure you can drive them but it is an awfull experience. Race Engines: The race engine is built half worn out. The clearances between piston/bore etc. are greater than a road car as the engine is designed for minumim friction at high tempratures. Race Suspension: Spring rates are normally a lot higher than road cars (a fast road Mk1 Cortina will run around 175lbs front springs - a race mk1 Cortina can run over 450lbs while carrying less weight) and camber angles are more extreme - promoting tyre wear amongst other things. Dampening rates are also often higher so the vehicle is impossible to drive fast on anything other than a smooth tarmac surface. Race Electrics: Basically there are none. Horns, lights, indicators etc. have no place on a dedicated track car except a class that requires them to be present. I could go on but I reckon you get the idea. A fast road car can be sensational on the road and operate at 85-90% of the chassis capability onth track where a race car will be 100% effective on the track but bloody awful on the road. ^ All personal opinion of course Quote Link to comment Share on other sites More sharing options...
RT Posted December 5, 2007 Share Posted December 5, 2007 Engine wise, much the same I would have thought... you can build a race engine to perform where you NEED it to perform, this being basically on the limit right? people who build engines for fast road cars tend to take a lot more into account then just max power. For example, a race 2L escort might have twin 50mm carbs and makes power between 5,000-8,000rpm. Drive it on the road and it will be a stumbling pain in the ass with no power or torque where it is require it hense.. not a fast car really at all. The point at which one crosses over into the other is personal opinion. Racing is entirely different to road driving and needs many different requirements in an engine and vice versa. Track cars don't need to sit in traffic, idle around carparks.. drive over things etc.. fast road cars don't need to sit at full revs continuously etc Imo a fast road car much have some trimmings, workable windows etc. Be able to sit in traffic without overheating. Be able to drive over speedbumps, fill up at petrol stations and so forth. My V8 engine build for example is for a fast road use. I have decided to compromise less this time as I was sick of warming up my 2L until the forged pistons stopped rattling their ass off in the bores. I also haven't over cammed it this time either as I want power from idle. And I chose a high stall of only 2200rpm as I didn't want to launch from the traffic lights any higher that this etc. Quote Link to comment Share on other sites More sharing options...
rxsumo Posted December 5, 2007 Share Posted December 5, 2007 Add the driveline stuff as well for the trackcar. Lightweight flywheel, with no inertia for "cruising up hills", coupled with a single or multiple plate clutch system that has no slip....off or on absolutely a killer in traffic. Close ratio gearbox....with straight cut gears, that will deafen you without earplugs Quote Link to comment Share on other sites More sharing options...
Guest vvega Posted December 5, 2007 Share Posted December 5, 2007 so really were talkign abotu focus the focus of a race car is to do one thing and do it really well the focus of a road car in any description is to do lots of things definitions definition of a race car a car soley for track use .not for targa not for sunday drives definition of a fast road car a car that has a warrent and or reg and is or can be drivin on the road....and is fast race car engine setup for max power with a very small powerband built to take proper race abuse 100% throttle 90 % of the time built for high G cornering built to do this and be a little reliable tuned to the ragged edge of lean to the point that bad fuel will kill it built with as little recipricating mass as posible to make it more peaky race car suspention/brakes/tyres normally having remote gas canisters normally hold higher nitrogen pressures to keep oil from foaming lightwieght arms all unsprung wieght is carfully pruned camber/caster/toe setup for max grip and tirewear is no longer a issue rims are light as posible /use ont the road could well lead to fractures from harsh bumps brakes large as posible/pads setup only to work well when hot/no cold stopping power/silicon fuild or somethign else exotic to minimise heat variation custem setup for the car tires sticky as to only last 1000km or less and bought for hot carictaristics gearbox close ratio..car tops out at teh end of the longest straight straight cut to minimise powerloss body everthign is extra very little attually real car left seat's there there to save ya life and hold you in place... not to be comftable etc look good and be fast Quote Link to comment Share on other sites More sharing options...
RT Posted December 5, 2007 Share Posted December 5, 2007 race car engine setup for max power with a very small powerband built to take proper race abuse 100% throttle 90 % of the time built for high G cornering built to do this and be a little reliable even when they are build 'a little reliable' the normally aren't.. take a look at V8 supercars, you'd think that with all the money spent there wouldn't be so many mechanical issues.. but thats racing for ya Quote Link to comment Share on other sites More sharing options...
Jay GTi Posted December 5, 2007 Share Posted December 5, 2007 race car engine setup for max power with a very small powerband built to take proper race abuse 100% throttle 90 % of the time built for high G cornering built to do this and be a little reliable even when they are build 'a little reliable' the normally aren't.. take a look at V8 supercars, you'd think that with all the money spent there wouldn't be so many mechanical issues.. but thats racing for ya That's because of the compromises race cars have as well. Strength is good, but being light wins races. The two are not good bedfellows, as Colin Chapman knew all to well. Quote Link to comment Share on other sites More sharing options...
Guest vvega Posted December 5, 2007 Share Posted December 5, 2007 race car engine setup for max power with a very small powerband built to take proper race abuse 100% throttle 90 % of the time built for high G cornering built to do this and be a little reliable even when they are build 'a little reliable' the normally aren't.. take a look at V8 supercars, you'd think that with all the money spent there wouldn't be so many mechanical issues.. but thats racing for ya lol yeah its a mute point most parts in a true race car are lifed after so many hours of running....put new ones in...its a dangerous game and sometiimes you lose Quote Link to comment Share on other sites More sharing options...
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