My friend has a 1990 240sx, SOHC. I have read much about the header being a pain to install. Also that the header rattles on the transmission? Is this just retards not knowing what they are doing? A quick fix? Also I recently added an intake, header and exhaust to my SR20 and it made a huge difference. Are these mods a big difference on the 240? I suggested he do these to get some great gains. Let me know what you guys think.
i/h/e aren't HUGE differences in power. honestly, it's more than likely just your perception. but if you were to throw that onto the dyno, you'll probably have only made about 10 or so hp to the wheels.
i've never heard of the exhaust manifold rattling on the transmission. you sure it's not the heat shield? because that's a known rattler.
Originally posted by esyip i/h/e aren't HUGE differences in power. honestly, it's more than likely just your perception. but if you were to throw that onto the dyno, you'll probably have only made about 10 or so hp to the wheels.
i've never heard of the exhaust manifold rattling on the transmission. you sure it's not the heat shield? because that's a known rattler.
It's a pretty big difference on the sr20. let's say it makes 10whp , that's a big difference when your talking about a 140hp car and a weight of 2400lbs. Header and intake complement each other very well, you cant have one with out the other.... love and marriage....
no 10WHP isn't much of a difference at all. you'll still be running practically the same 1/4 times. you'll probably be like 1/100 of a second faster.
intake and full exhaust system complement each other. not just intake and exhaust manifold. because if you have aftermarket intake and manifold, but you still have the stock restrictive cat-back, that's going to do you no good. your goal is to create a free-flowing exhaust system where the exhaust gas velocity exits at a higher speed, rather than getting caught up in the twists, turns, bends, and causing a bottleneck in your pipes.
Originally posted by esyip no 10WHP isn't much of a difference at all. you'll still be running practically the same 1/4 times. you'll probably be like 1/100 of a second faster.
intake and full exhaust system complement each other. not just intake and exhaust manifold. because if you have aftermarket intake and manifold, but you still have the stock restrictive cat-back, that's going to do you no good. your goal is to create a free-flowing exhaust system where the exhaust gas velocity exits at a higher speed, rather than getting caught up in the twists, turns, bends, and causing a bottleneck in your pipes.
Thanks... got that, notice I have I/H/E. So... by this logic, if I had an extra 50 hp, I could drop my 1/4 by .5 sec? Sounds great sign me up for a turbo I know for a fact that the intake header and exaust have lowered my 1/4 by .8 sec at least so i'm not sure about your 1/10th in the quater senario.
at least? so you're telling me you don't know then?
any tuner will tell you that these bolt-ons will do close to nothing for your car. yes, it'll give you SOMETHING. but it's nothing to ogle over. i mean, come on, i know of someone with all the bolt-ons, including an ignition system, hotter plugs (since it's N/A for now), advanced timing, and light suspension. and he's only getting about 145-150FWHP. that's only ~15WHP gain. not much of anything, don't you think?
I've used G-tech, from 16.1 to 15.3. You can argue about the g-tech but hey. Also, just so we are on the same track, what motor are you talking about, and in what car?
well, going by your little profile thing under your name, i'm speaking of the FWD SR20DE engine. and i'm talking about a G20 (the person that i know).
yeah, i know we can argue g-tech all day long. i'm not saying that those times are wrong, but the difference is that the person i know dyno-tuned his car after those mods because he has access to a dyno. and i hate him because he's lucky enough to have access to a dyno like that.
Originally posted by esyip well, going by your little profile thing under your name, i'm speaking of the FWD SR20DE engine. and i'm talking about a G20 (the person that i know).
yeah, i know we can argue g-tech all day long. i'm not saying that those times are wrong, but the difference is that the person i know dyno-tuned his car after those mods because he has access to a dyno. and i hate him because he's lucky enough to have access to a dyno like that.
Look I'm not arguing the performance gains, I agree about 10 to 15 whp. I'm just saying that that does make a difference in a light car like the sentra. I know the g20 is a bit heavier, maybe this accounts for it. Don't get me wrong it's not a turbo HUGE increase, I understand that. But I will say that your statement about a 1/10 in the 1/4 is wrong, ask any of the sentra guys that have done it and have track slips. It came stock running 15.7 (most mags account that) and there are plenty of people running into the 14's w/ bolt-ons, maybe a ecu but that's pretty much it.
when you throw in a new ECU, that's a different story because with a new ECU (let's say JWT, for example) you'll need some kind of remapping to be done, and some kind of dyno-tuning or else it won't work as well as it should. i'm not saying the i/h/e is going to change the 1/4 by nothing, it was more or less an exaggerated statement to mean that "it's not going to do anything special for you, so don't get your hopes up" kind of thing.
I know for a fact that the intake header and exaust have lowered my 1/4 by .8 sec at least so i'm not sure about your 1/10th in the quater senario.
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