I have a slightly modified '93 hatchback with HICAS so it started at 154hp.
During it’s 223Kkm I have added a cone air filter, header, chip, exhaust and underpulley as well as removed the failing air-conditioner, and kept it well maintained.
About what horsepower would I have now? - Dave 
shit the guy just asked a simple question you dont have to junk down his throat for it…
if you want exactly the amount of HP you have just take your car to a dyno…
if your in highschool get one of ur buddies to dyno it at the autoshop (mine has a RWD dyno dont know about yours tho)
or they have dyno programs which can calculate how much horsepower you would have with diff. mods not sure which program tho.
hope that helped
EDIT: or you can find someone with similar mods and ask them
We can always throw some numbers out there. Any good guesses? I’m gonna say 165-175.
Most likely below 154hp. I could write a book about why. One simple reason, its not going to have the same compression as an engine that was just broke in.
A cone air filter will do jack, exhaust may do something in the high end, chip upgrade is where you make noticable hp.
But ofcourse, if you think like this:
You will think you have more hp :S
Now, I have seen a dyno sheet and track time from a guy in the states the ran round 15 quarter mile with cold air intake fed to the front bumper, full 2.5 inch cat-back (apex dual), some expensive chip upgrade and tuning, hotshot headers, underdriven pullys. I think he had other stuff too. But he had a low KM engine.
It is possible, but with the mileage on your engine, doesn’t matter if its been babied, its had lost of revolutions. Another thing is, when the engine is broke in, the same engine in another car just broken in will not make the same power. It all depends on how it was broke in. Some people have a strong engine, some don’t. I road in Candiandrifter240sx’s car, and his SOHC pulls harder then mine, and any other SOHC 240 I’ve been in. But, he has over 200,000km on it.
So, the depate can go on for hours, month, and years. If you want to know, take it to a dyno and find out.
Andrew.
its 154 engine HP, not RWHP, with woul be like 120 stock, with your upgrades, there would be a good difference, like idiotbox said, these numbers are also from a new engine.
The air intake, pulley and removing the air conditioner will increase torque and a little hp.
The header, exhaust and chip will increase HP.
I’d say that you are probably around 150 RWHP, which is good.
Actually an e-test machine is only good for about 130 hp. Anything beyond that and it doesn’t have enough rotational inertia to be give accurate readings.
Actually an e-test machine is only good for about 130 hp. Anything beyond that and it doesn’t have enough rotational inertia to be give accurate readings.[/quote]
I dont think it has anything to do with Rotational inertia,
pretty sure it is because omega is too large for such a radius and the instrument cannot record it, thus, increase the radius or get more precise instruments. 8)
i will guess 137rwhp
With loss of power through the drivetrain and such you will have lost a lot of power. So 155hp (Nissan claimed) actually would equal closer to 130ishWHP. Add (or subtract rather) the power lost through age and the like then add the “power” upgrades and maybe you will be at the original 130ishWHP.
Somewhat OT - If you put something on that adds 5hp, you will not notice a difference. (K&N filter, anyone?) You will need at least 10hp before anything is noticed, and then you will still lose most of it by the time it goes to your wheels… so the moral of the story is buy a Civic.
I dont think it has anything to do with Rotational inertia,
pretty sure it is because omega is too large for such a radius and the instrument cannot record it, thus, increase the radius or get more precise instruments. 8)
=D> very nice sentence… lol… i hope a sponsor reads it…
No no no…
The moment of inertia for a cylinder is = 1/2MR^2
Thus if you increase the radius, you also increase the moment of intertia.
In other words you need a larger cylinder (roller).
I was right… biznatch!
^^^
Thats just a consequense of increasing the radius, it is not the reason for increasing the radius. The moment of interia does change when you increase radius, and so does volume of a sphere, but we are not looking for either, your theory is wrong.
in·er·tia ( P ) Pronunciation Key (-nûrsh)
n.
Physics. The tendency of a body to resist acceleration; the tendency of a body at rest to remain at rest or of a body in straight line motion to stay in motion in a straight line unless acted on by an outside force.
Inertia has nothing to do with it, because the machines do not read inertia! The instruments read, angular acceleration, angular speed, and time, (alpha and omega). These are all calculated without moment of interia.
Bitznatch.
^^^
Read my message again.
I said the moment of inertia increases with an increase in radius. Which is correct.
Then I said that you need larger rollers in order to calculate the angular acceleration more accuratly. Which is also correct.
Regardless of whether or not you are looking for the moment of inertia, it is a consequence of increasing the size and mass of the roller, which are both neccesary when calculating more power. Why do you think an emissions dyno has 4 little rollers, whereas a perfomance dyno has a giant in-ground roller that is many times the size?
An e-test machine won’t tell you jack, and if you try to modify the programming, the machine locks itself and sends a message straight to the government, which will be knocking on your door in about 5 minutes flat.
back on topic, alot of “performance” parts have been dyno tested, and proven to actually give you a LOSS in power. Haven’t read anything 240 related, but i stopped picking up tuner mags a while ago.
so yeah, the only way you are going to get an answer is if you put your car on a dyno. My second 240 (the one i currently own) felt MUCH faster than my first, even though this one is the basic, basic SE model, and my first s14 was top of the line, had every option (except the suede/ leather combo seats).
ohkay lets go through each of the sections to see how you agreed with me and totally dismissed your argument lol.
Yes you did, and so did I, except i said this has nothing to do with the dyno machine, which is true, so moment of intertia means dick all!!
No i said it first, right after you posted your initial response of moment of inertia, i said omega (angular velocity) is too large “thus, increase radius” of rollers!!!
This statement is agreeing with mine! YOU DONT NEED MOMENT OF INERTIA!!! your argument is that, moment of inertia is what makes the difference, i said it wasn’t so you agreed with me pete! And like i said, sure moment of inertia increases when you increase radius, but so does countless more, unimportant things, like volume, area, ect.
Conclusion:
Pete i am enjoying this argument, except stick with your initial argument, don’t agree with me and argue my point against me, because you are just agreeing with me!
^^^
Wrong!
Moment of inertia means dick all huh? Only radius matters hmmm?
So take a roller of radius 10 meters, and mass of only 10 kg. Use that as a dyno roller. Think it will work? NO! There will be an insufficient moment of inertia, which depends on BOTH mass and radius.
Sure you can calculate many things without the moment of inertia, YET, you cannot deny the fact that it is directly related to what we are talking about. Therefore moment of inertia has relevance! <-- Which is exactly what I was saying in my first post.
And no, that’s not agreeing with you.
Anything beyond that and it doesn’t have enough rotational inertia to be give accurate readings.
k so lets give it more rotational inertia, now its gone from lets say 5 to 10.
k so we are on the dyno and in 3rd gear the rollers are going 100rad/sec, … but this is strange when the moment of inertia was 5, it was also going 100rad/sec in same gear and same RPM,… HA this is because i only incresed the mass instead of the radius sure the moment of intertia changed but this actually wouldn’t change the reading, just make the whole process slower
so pete, we are both right, i am just righter (lol) you are right when these variables change, the moment of inertia will also change but it is just consequence because in this situation where time is not a big factor the moment of inertia doesn’t pay a role. You can change the moment of inertia to prove your initial statement but you have to define that you changed the radius to do so … and there is my thesis.
^^^
Yes, but you are still misunderstanding my initial statement.
All I am trying to get across is that moment of inertia is related to proper roller sizing in a dyno. Which was my original 1st post, which is correct.
the aprox ka24de has about 120hp at the weels after about 150km so im going to say 135at the weels.
i didnt read what anyone else wrote
Lets get back to the original arguement, we are getting way off topic, … moment of inertia is very important to defining rotation except, the point of the arguement was … why can’t a e-test dyno meter go past 130.
It doesnt matter what you do to the moment of inertia, because the reason that the meter cannot go past 130 is because it needs to have a smaller angular velocity (omega) to calculate with, so a larger radius makes it easier to define with becuase going in 5th gear at 6000 rpm is a really large angular momentum, so a bigger radius will lower it.
… man why couldn’t we had this arguement before the exam, would of helped probably.