I’ve got an s13 prepped for track, and i give alot of ppl a run for their money even with turbo’d cars It can be done, if built right… but most people used to argue with me about “you don’t need this”, or “you should just get this” and bottom line is don’t give a fuck about people’s opinions. Do what pleases you with YOUR car
As far as my advice goes. Forget power. That’s the first thing EVERYONE likes to do… forget it. Concentrate on handling, grip and control. That is…:
-make the car lighter if you’re serious (I dropped slightly over 300lbs of my s13 hatch). If you’re even more serious, you’ll want to get some frp/carbon replacement panels/hood/etc… Only go with doors if you’re going to have a cage which u should. S13 doors are ridiculous like 65lbs each. If you’ve got more money still, legan windows. Our stock windows are heavy as hell… but then glass usually is…
-Get lightweight wide wheels (RPF1s rock) and wide sticky tires (I love NT01s) I’m running 255/40/17 all around but I’ll be going to 295/30/18 all around
-Get quality shocks… Fuck what everyone else says. If it doesn’t have the names bilstein, koni, moton or jrs on them, don’t bother with them. All the china/japan shit is shit. I run koni 8611 double adjustable race shocks front and rear. Rides like a dream on track. Still managable on street compared to the china shit. Their job is not to SLAM your car, their job is to control the wheels and body motion.
-Get rid of all the thousands of bushings on the 240sx with pillow ball mounted arms instead, including rear upright. You could get a z32 upright saves about 8lbs per corner of unsprung weight.
-Get an s14/s15 subframe, the s13 one likes to slide because it’s got slightly inferior geometry than the s14/s15 which were made to drive like a normal car not a slide happy car. Less anti-squat, slightly wider, and LCA mounts are positioned slightly differently too, and toe curve is better.
-Get better brakes… everyone used to make fun of my idea that the 240sx brakes suck a bag of dicks… then slowly the same big boys got the exact kit I was suggesting a willwood big brake kit front and rear from arizona z car… anyways, personally I believe you need a set of quality rotors that will take abuse and heat… and a good caliper with good pads… Most people will say stock crap is good enough if you just get new rotors and better pads and brake lines… Brake lines are a given they give better feel vs the rubbery stock crap… But they are wrong, they are not driving their car hard enough. I had 300zx calipers front and rear as an upgrade… it was barely any better, got some slightly more aggressive pads and it sure stopped better but the rotors could not take the heat. Screw that. Waste of money getting junkyard crap. Also you need STICKY TIRES to stop faster… so keep that in mind. Sticky tires are your friend. All seasons are the devil, summer tires at least… and r comp tires if you wana compete.
-Now you can consider some power… what I did though is work up the ka… yes the ka… and on track ppl thought i had a turbo sr (o_O wtf?), it’s just a bloody ka… BUT… got a lightweight driveshaft, i got a 9lbs flywheel, i got a cerametallic puck clutch, i got a 4-2-1 header, exhaust, intake, better wires, better coil, timing advance, short shifter and i forget what else right now but bottom line is… the lil bastard became rev happy, although with the ka i never go beyond 5500rpm it just falls off at that point i just upshift. I can heel & toe super quick through corners, shift up, shift down and it goes through the revs fast. I could hit 230km/hr with my ka (yes but its slow as hell to get there past the 180 mark heh)… i have a different ecu which doesn’t have top speed limiter.
-Lastly aero every bit helps… wing, front splitter, rear diffuser, full flat underbody like sasha did on his old s14…
So there…
Personally though I would have gotten an fd rx7 and upgraded that… but since im already deep in this shit I’m going to stick it out with my 240sx… plus i have a love love relationship with it I’ve owned the car since 2006 and don’t intend to get rid of it but just keep rebuilding/building it