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Discussion Starter #1
Hello guys, want to share this with you & have your ideas as well.

Horsepower Design Equation Formula Calculator - Engine Horsepower Trap Speed Method

<<quote>>

Solving for engine horsepower using the trap speed method.

HP = weight x (velocity / 234) cubed

This method uses the speed or velocity at the end of a quarter mile
run. It is used to give an estimate of vehicle (car, truck, motorcycle)
engine horsepower. Weight should include the mass of the vehicle,
driver and passenger.

<<unquote>>

I can tell you exactly the units for each item (wt.,velocity, etc.)
but you can use the calculator from the site & you can directly
input your data with their corresponding units to choose from.
I also don't know where they got the constant "234" and its unit
also.

There are other HP calculators also using the elapse time in a quarter
milw run. You can go to this link:

Horsepower Design Equations Formulas Calculator - Engine Horsepower ET Method

What do you think guys?
 

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Discussion Starter #2
Guess everbody here knows there Specs very well.
Actually, if you have your specs w/ all the info (HP,Torque,Wt.)
you don't need these grumpy formulas anymore.

Anyone???
 

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That formula has been used for years. Its pretty accurate actually. 1/4 mile speed is a good hp indicator. 1/4 time is not.
 

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I have read from one site that the 550cc Carry is 45hp and 50hp for the 660cc. It was not indicated whether the figures were brakeHP or EffectiveHP.
 

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Discussion Starter #5
XL7Limited said:
That formula has been used for years. Its pretty accurate actually. 1/4 mile speed is a good hp indicator. 1/4 time is not.
One question: Do we have to really "floor" the gas to get a more
accurate hp ?

If we have a 5-speed MT, do we have to reach until the 5th gear just
in time to reach a quarter mile? for better result???
 

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Discussion Starter #6
lance_pad said:
I have read from one site that the 550cc Carry is 45hp and 50hp for the 660cc. It was not indicated whether the figures were brakeHP or EffectiveHP.
You're right Lancepad, I also read that from other site, saying our 660cc
is 52hp. But we don't know for sure ???
 

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you should not be in 5th by the quarter mile on a stock car..


BRUCE LI said:
One question: Do we have to really "floor" the gas to get a more
accurate hp ?

If we have a 5-speed MT, do we have to reach until the 5th gear just
in time to reach a quarter mile? for better result???
 

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so how do we do it exactly in the quarter mile in order to get the right HP for the van?
 

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Discussion Starter #9
XL7Limited said:
you should not be in 5th by the quarter mile on a stock car..
Thanks for the info, I figured out that our vehicles will run faster if we
prolong (to a certain RPM) our gear shifting to build enough power or
momentum to reach top speed, compared to just "hurrying up" to reach
the 5th gear.

I think this is why I run slower compared to other drivers because I dont
stay longer than 5sec. in one gear (1st, 2nd, 3rd), tsk, tsk, tsk. . .
Also, I won't allow my RPM to reach 3000 before shifting to the next
gear (1, 2 & 3). In the 4th & 5th however, I can stay longer (sec.) &
even reach a higher RPM.

Am I doing the right thing here?

.
 

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Bruce, I have read an article stating that for the best fuel economy, upshifts should be between 2000-2500 rpm. Sad to say, our Zuks don't have stock tachometers.

I believe you have a tach installed. Can you walk me through the installation? This would be the next project for my ride. Pls advise on the details of the materials you used. Thanks.
 

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hmm... Sir BRUCE_LI hindi po ba, ung tachometer sa Van nyo eh standard na?
nasa guage cluster cya hindi po ba... and since EFI ung van nyo meron tong onboard na "computer", dun po ba naka-kabit ung signal para sa tach?
 

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Discussion Starter #12
lance_pad said:
Bruce, I have read an article stating that for the best fuel economy, upshifts should be between 2000-2500 rpm. Sad to say, our Zuks don't have stock tachometers.

I believe you have a tach installed. Can you walk me through the installation? This would be the next project for my ride. Pls advise on the details of the materials you used. Thanks.
Actually, my ride has its own taco since I bought it from the casa.
I don't know if it's stock or orig. but it's built in & beside the speedo.

Anyway, I'll try to follow that advice (2000 tp 2,500 rpm). But I think
our vehicle will run slow then (40kph at 5th gear).

Have a nice day!
 

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Discussion Starter #13
blue said:
hmm... Sir BRUCE_LI hindi po ba, ung tachometer sa Van nyo eh standard na?
nasa guage cluster cya hindi po ba... and since EFI ung van nyo meron tong onboard na "computer", dun po ba naka-kabit ung signal para sa tach?
Yap, it's already there when I bought it (photos on other thread).
I know that I have this Engine Control unit (computer box), but I'm
not sure if the tacho is attached / connected to the computer.

I have a manual here but it's japanese :(
Besides, I'm not also sure if the manual includes info about the ECU
or computer. My manual is SUZUKI CARRY & EVERY, but since many
claim that my ride is a "scrum", (sounds like scam, hehe) I don't think
it has all the information I would want to acquire for my van.

regards
 

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it might run slower but then again its for fuel economy =)

OT:
maybe we need to start learning nihongo, there are also a lot of labels(not figures) on my ride that I can't understand... hehe
 

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Discussion Starter #15
blue said:
it might run slower but then again its for fuel economy =)

OT:
maybe we need to start learning nihongo, there are also a lot of labels(not figures) on my ride that I can't understand... hehe
Actually, I have asked a Japanese friend here in my company to
translate some words in English, esp. on stickers found on the
passenger door(tire press.), top cover of the engine & the small plate
on the 2nd row sliding door.

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