akuma said:
shiroitenshi,
actually,i've seen/read dyno graphs dat r worst thn b4 modding...ie power across d range is lower compared 2 b4 modding n only gain 1-2hp @ a certain rpm(yep,sum sort like spike).....so,let's say u haf a mod dat can gain say 2hp across d range compare w anoda mod dat might gif u 5hp @ 5000rpm-6000rpm only,while d rest of d rpm range remain same or worst..whc wud u choose?i'd choose d former of course....across d range is wat i'm aiming for.....
n also,alot of enthusiast emphasise too much on hp gain.wat abt torque?y is dis figure not relevant in most power gain talk?ehheheheheh.....
i just wanna kpc in here...my car slow....EF7 Si... =)
All of us oso KPC lah.. or not why hang around in a forum, no? In the process of talking, sometimes I also learn something new right?
I see what you mean, but what kind of mods can give you 1-2hp across the range? (unless the ori part is so badly designed that it sucks a$$, which is NEVER the case with Honda cars) I don't think a simple intake / exhaust mods will ever help you achieve that. AFAIK, only by tinkering with piggyback / ECU systems will do that (provided you did the intake / exhaust mods already).
I'm not really disagreeing with you, but when you're talking about NA, every single bit counts. Of course, I agree with you that more is better, but I think for NA, we shouldn't set our goals too high. (Which was why I mentioned about turbo cars). With NA, if a single bolt on can get you 1-2hp (even if it's just limited to certain revs), you can already clap your hands, since you haven't compensated for those changes by using an AFR (cheaper method, very limited power gain) or using those piggyback/ECU systems. You have to remember that the leeway for gaining power on NA engines are very limited compared to turbo. I'm thinking this way because I have to scratch my head and empty my wallet for what you call a meager 1-2hp gain across the powerband. Of course, I know of other methods to increase power considerably across the rev range (removing AC and power steering, but would you live without them on a daily driven car?). Some other mods I know off are even riskier, as it compromises reliability.
Another thing I remember is that due to engine design, sometimes what we're doing with the mods is moving the powerband. IMO, the D16(previously on mine) are quite good at low revs but really lacking as the revs climb, so any mods that improve power at the higher revs is good, although sometime I have to sacrifice the lower end power (a bit) to achieve this. Since I drive on the highway a lot, I'm always wanting better top-end power, even if it costs a bit on the lower revs.
NA isn't the easiest to mod, and it's usually through trial and error that we find out which product works best and offers best power gain. Unlike turbos, where we just have to make sure the fuelling is enough and the block powerful enough to support more boost.) If you add a just add bigger intake or exhaust to a turbo car, the power increase is usually not just 1-2hp (depending on the performance of the ori part). If you do that with an NA engine... I don't think you'll see much difference unless you already did other expensive mods mentioned in my previous post.
IMO,
Torque figures are also important, and usually increase with horsepower numbers (the torque numbers are used to calculate the HP after all).
HP = Torque x RPM / 5252 <- interestingly, 5252 is the magic number where when RPM=5252, HP=torque.
God knows who came up with this equation and why (I'm still learning after all)
For me, the torque is the G-force (acceleration) you feel when you 'pedal to the metal' to achieve a wanted speed. Of course, I want more torque too, but that's usually only achievable by increasing displacement, or spending on a few thousand dollar for a mod part (and other supporting mods). Intake and exhaust increase the torque as well, but usually gives rather dismal numbers (after minus the transmission loss) that they can be ignored entirely.
Which is why, after 2 hours of thinking (before conversion).. I went for B16A conversion... cheaper in the long run. ROFL! Still, I think the D16 with minor mods are enough to make someone's day..Heck! It satisfied me for a day!
(Now you know why
J101 keep saying a conversion to B series is much better)
Just my 4 cents (cumulative mah!)
