KA24DE w/ APEXI 3" CATBACK

[s13240sxkade91]

all i have to say is in a ka motor you have plenty of TQ in fact i think it needs to lose some TQ and gain some HP even if it is N/A

[240sxGuy3]

Why are they giving you shit about your exhaust???WTF isnt it your car?? Anyway nice video, nice car, great sound! They dont know what they are talking about anyway!! Most ka n/a 240sx owners (including myself) put a 3" exhaust on their car and it gives good throttle response, and better torque than stock! And ive never heard of piston rings going out by having a 3" catback!! They dumb as hell! I got a friend with a n/a dodge stealth and hes had a 4" exhaust for the past like 120K an still good!

[untouchabledriver87]

THERE! lol Now I'm done. haha And if you want, let's compare vehicles. I'll more than willingly unbolt the exhaust system and dyno my G/F's stock 200SX, then we'll test it with a performance exhaust. I guarantee it'll have more low end TQ and an overall better powerband. Not to mention, if you go too big on the diameter of pipe, you're actually restricting the exhaust flow due to baffeling. But then again, what do I know? I've only been building track cars for 10 years. lol

[PerfectBalance]

So much misinformation. You don't need backpressure.

[BMXB123]

Dreezed is right. My bud with a s13 KA24 with a 3" straight exhaust raced me ( slow scion xB) from a 45 roll and i'm sorry to say i was slowly pulling away

[pantythiefninja]

holy shit that last second of your video where that SUV shows up looks like one of those videos that simulate the last thing you see before you die it was sweet

[mr100]

sounds sickk

[DreEzed]

Don't get a 3' exhaust if your runin N/A or KA.

When you step on you feel less torque I guess because of the back pressure is gone.

[twofortysx]

FALSE.

[DreEzed]

You still get top end never said you won't.

[untouchabledriver87]

@twofortysx Yeah, you might gain a few ponies, but you'll be having fun replacing piston rings after they're toast cause of the lack of back pressure. That is if you deleted your cat too. ?? lol

[twofortysx]

@untouchabledriver87 So being that you seem to be an expert on the situation........explain to me why my car, which still retains this exhaust system and was swapped to a dual cam KA with better than average compression numbers in April of 04, is still running almost perfect compression as of June 2010?

[twofortysx]

@untouchabledriver87 So being that you seem to be an expert on the situation........explain to me why my car, which still retains this exhaust system and was swapped to a dual cam KA with better than average compression numbers in April of 04, is still running almost perfect compression as of June 2010?

[untouchabledriver87]

@twofortysx So being that you seem to be an ignoramus to the comment... I said "...That is if you deleted your cat too. ??" As in, I was questioning whether you did. If you deleted your cat = problems in the long run. If not, a teeny tiny bit more power and a whole lot of noise. lol Never claimed to be an expert, but I did build my car from a non-rolling chassis. (still have a few bugs to work out though...). Either way, sounds healthy, but don't delete your cat if you haven't already.

[untouchabledriver87]

@twofortysx *sigh* Who claimed to be an expert? I'm just saying what I've seen to be the culprit behind shitty valves and fried rings. If it makes you any happier, sure... I'm wrong. End of convo, live your life, and learn. I got sick of replacing rings and valves. Do what you wish. Still didn't answer whether you took the cat out too or not? That was my initial question.

[240sxRule]

@untouchabledriver87 Are you a fckin retard? lmao you want as little backpressure on a fourstroke engine as possible so your pistons arent pushing the exhaust out and you have little to none exhaust left in the cylinder when the cycle goes again. You want backpressure in two stroke engines so all your gas/oil doesnt go out the tailpipe and it actually ignites. Go do some research on cars before you move up from your dirtbike to a real vehicle..

[untouchabledriver87]

@240sxRule Wow... only half a year late, but ok. I own a 240sx with an SR20DET. Yes, SOME back pressure is good. Otherwise we'd be running open manifolds, no? Look, I'm not going to have a pissing contest with you, but ever wonder why straight pipe cars start smoking often? Do some homework. N/A cars need some backpressure to avoid some damage.

[240sxRule]

@untouchabledriver87 Just why would you need backpressure in a 4 stroke engine? You ever wonder why headers are all spidered and such? There made to pull the exhaust gases out. Thats one reason open manifold is useless.

[240sxRule]

@untouchabledriver87 answers.yahoo.com/question/ind­ex?qid=20070804195122AAwIiUT

[untouchabledriver87]

@240sxRule A). Your URL is broken. B). I never said open manifold are good. C). I have no clue why I'm arguing on here. It's a mute point. lol And lastly D). Yahoo Answers....Reeeeally??? o_O Either way, if you want to burn as much oil as gas later on down the road... You run those straight pipes! In most cases you lose more power than gain in a N/A application anyway. SOME backpressure = more TQ. There's something for you to google. lol

[untouchabledriver87]

@240sxRule P.S. the truth of the matter is that gasoline engines require some degree of backpressure for peak performance and the broadest power curve. This is due to the nature of the internal combustion process. In a straight exhaust system setup, backpressure is nearly eliminated. Therefore, during the exhaust and intake valve overlap, or the time when both valves are open, precious fuel escapes through the exhaust system.

[untouchabledriver87]

@240sxRule This is because the area of the combustion chamber surrounding the exhaust valve becomes a low pressure zone once exhaust gases are forced out of the cylinder. As the intake valve opens (and the exhaust valve is open, but in the process of closing), fuel rushes into the cylinder and is attracted to this low pressure portion of the cylinder. Since the exhaust valves have not finished closing, fuel and air exit through the valve and out the exhaust system.

[untouchabledriver87]

@240sxRule When a high performance muffler is used, enough backpressure is withstand to eliminate the low pressure environment of the cylinder surrounding the exhaust valve, therefore keeping fuel and air from rushing out of the cylinder during the overlap time between the exhaust and intake valves. It is as simple as this; less fuel in the cylinder means weaker combustion, which ultimately means less power. Low RPM torque on a straight pipe is virtually eliminated too.

[BDucasse21]

@twofortysx DreEzed is right to a certain extent... running a pretty much stock KA24DE or even KA24e will change your torque characteristics... u wont feel it much until about 4000 rpms ... but other than that, a 3" exhaust on a stock KA is not bad... it will push up ur peak hp rpm

[supratt1001]

sooo true u lose tons of low end power

[nickg421]

not true, i've run 2 1/4 and a 3 inch catback, as long as you still have the cat you''ve got plenty of back pressure

[AquAcid]

@DreEzed I have a sohc ka with this exhaust and It feels great even in the low end sounds really nice and throaty

[ilovesilvia69]

sounds like mine :)

[dsportnissan]

sweet ass tunnel...exhaust sounds good

[SlidewaysS14]

is this in the squirrel hill tunnels???

[ADRIANGSR]

sweet..:) check out mine

[Drifter001]

Nice run..

[SFBoxers]

whats the 0-60 time on ur ka24de? do u know? that apexi sounds delicious man! hah