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Test Driving & Comment about Hyundai Accent
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chankarchun
General Member


Joined: 01 Mar 2005
Posts: 81
Location: penang

PostPosted: Sat Mar 05, 2005 4:53 pm    Post subject: Test Driving & Comment about Hyundai Accent Reply with quote

specification:
engine vol < 1.7L
Price < 100k
power ratio < 0.08 max-ps/kg
low-end tork (at 2200rpm) < 0.07Nm/kg

where,
power ratio = max ps/curb weight;

i consider the tork is not a curve line but linear (straight line).
then the low-end tork at 2200rpm will be...
if max tork for accent 130Nm/3000rpm, curb weight = 1000 kg

low-end tork @2200 = 130*2200/3000/1000kg = 0.0953 Nm/kg


Scoring:
FC = 1 (1.6 L) = 2 (1.5 L)
low-end tork = 1 (>0.06) = 2 (>0.073) = 3 (>0.086) = 4 (>=0.1)
max-tork's rpm = 1 (>2k) = 2 (>3k) = 3 (>4k)
mass = 1 (>900kg) = 2 (<1000 kg) = 3 (<1100 kg)
safety = +1 point for each item installed
(ABS w/ EBD, Immobilizer, dual SRS Air-bag)
pick up (mean for 7:3 city vs hiway) = 0.7*low-end tork+0.3*max tork's rpm
power = 1 (>0.0 = 2 (>0.09) = 3(>=1)
price=retail price/10000
~~~~~~~~~~~~~~~~~~~~~~~
accent 1.5

low-end tork @2200 = 130*2200/3000/1000 = 0.0953 Nm/kg
power = 91/1000 = 0.091
mass = 1000 kg

score:
Fc=2
pickup=3*0.7+2*0.3 = 2.7
power = 2
mass = 2
safty = 0.5 (PCV brake)
total score = 9.2
price = 6.5
idealism = score / price = 1.415

~~~~~~~~~~~~~
city i-dsl

mass = 1070 kg
low-end tork = 131*2200/2700/1000 = 0.107
power = 88/1070 = 0.082

score:
FC=2
pickup = 4*0.7+1*0.3 =3.1
power = 1
mass = 2
safety = 3
total =11.1
price = 7.9
idealism = 1.405

by using same method...
vios 1.5G
FC = 2
pickup = 2.3
power = 3
mass = 1
safety = 3
total = 11.3
price = 8.5
idealism = 1.329

~~~~~~~~~~~
city vtec

FC = 2
pickup = 1.6
power =2
mass =2
safety =3
total = 10.6
price = 8.4
idealism = 1.262

~~~~~~~~~~~~~~~~
spectra 1.6

Fc=1
pickup = 1.6
power = 2
mass = 3
safety = 1
total = 8.6
price = 7
idealism = 1.229

~~~~~~~~~~~~~~~
jazz i-dsl

Fc =2
pickup = 3.1
power = 1
mass =2
safety = 2 (dunno whether got immobilizer)
total = 10.1
price = 9.4
idealism = 1.074

~~~~~~~~~~~~~~~~~~~~~
elantra 1.6

fc =1
pickup =2.7
power =1
mass =3
safety =1 (only Abs no airbag, immobilizer ??)
total = 8.7
price = 8.6
idealism = 1.012

here show accent is most ideal!!

*dunno how to calculate fc, so just by engine vol. and neglet the fuel burn efficiency.
*max power and pickup is related to mass, more heavy, no power and pickup!!
*mass score is for stability.
*safety according to item installed only, the car body structure negleted coz dunno how (by crash test rating ??)
*total, the higher the better the car
*price, for affordable luxury thing ignored
*idealism, worth for $$ or not

this is my survey, any comment??
correct me if anything wrong.
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chankarchun
General Member


Joined: 01 Mar 2005
Posts: 81
Location: penang

PostPosted: Thu Mar 17, 2005 5:31 am    Post subject: Reply with quote

i do it on my own consideration.
coz i wanna buy a car with the specified spec on top of the scoring system.

for safety...
if a car have ABS with EBD, plus 1 SCORE.
so accent have only 0.5 for PCV.
if a car have ARS dual airbag, plus another 1 SCORE.
1 SCORE for immobilizer.

so a total of 3 scores.

the side impact bar i ignore it due to insufficient data from other cars.



i do consider the price...
the total higher means the better the car.
in term of power, pickup, safety accent still lose to city i-dsl.
but after i divide the total point with the price... accent win! so it is the most ideal car for me. cheap, nope, i mean worth for my money(so the idealism will tell this).
note that the score for price is retail price divide by 10000. so, for accent, price = 6.5.

i have the whole analisys in ms-excel file, but don't know how to put in this forum, so just write out without a good order.
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chankarchun
General Member


Joined: 01 Mar 2005
Posts: 81
Location: penang

PostPosted: Thu Mar 17, 2005 5:52 am    Post subject: Reply with quote

in the survey, power is for top speed, tork means pickup, and these 2 element is affect by the mass of the car (curb weight).

vios 1.5g is not so good, since it is only 980kg, i think will fly when speeding.

but the total score still better than city idsl.
due to the part of pickup and power vios xins alot. so i think i need to modify the scoring a bit on the mass part.
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chkwong
Senior Member


Joined: 24 Jun 2004
Posts: 882
Location: Bandar Kinrara, Puchong

PostPosted: Thu Mar 17, 2005 9:20 am    Post subject: Reply with quote

Majority of modern cars got PCV one la. It's not an ABS device.
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marky
Club Founder


Joined: 12 Jul 2004
Posts: 2418
Location: Subang Jaya

PostPosted: Thu Mar 17, 2005 11:24 am    Post subject: Reply with quote

A lot of car have to strip down their items even the metal plates in order to reduce weight (cerb weight) and FC (lighter the car lesser FC).

Look at Toyota Avanza, the internal parts like seat etc, they had to use lighter material and slightly cheaper goods. That is why a 1.3cc vehicle is able to move a vehicle that big. If the same engine inside the Uncer, FC is damn high.

The heavier the vehicle, the more Fuel needed to move the vehicle.
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chankarchun
General Member


Joined: 01 Mar 2005
Posts: 81
Location: penang

PostPosted: Fri Mar 18, 2005 12:50 am    Post subject: Reply with quote

the main thing is, if the weight of the vehicle is up to a certain level, the highway speeding will be safer.

think of city that speed 170kmh vs vios (which is 90 kg lighter) with the same speed, i think the heavier one's handling will be better.

oic!! PCV so common one ar!
then the ABS (mech type), also is a marketing strategy lol.
ai! KB KB.
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marky
Club Founder


Joined: 12 Jul 2004
Posts: 2418
Location: Subang Jaya

PostPosted: Fri Mar 18, 2005 12:54 pm    Post subject: Reply with quote

Heavy vehicle does not mean better handling too. F1 cars are made light but low. There are many factors to take into consideration.
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soulkipper
Junior Member


Joined: 20 Jul 2004
Posts: 235
Location: Puncak Jalil

PostPosted: Tue Mar 22, 2005 4:55 pm    Post subject: Reply with quote

And those F1 cars compensate their weight with aerodynamics and downforce and tested in the wind tunnel ma Very Happy
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chankarchun
General Member


Joined: 01 Mar 2005
Posts: 81
Location: penang

PostPosted: Wed Mar 23, 2005 4:10 am    Post subject: Reply with quote

Weight Class - Statistics show that if two vehicles with the same NHTSA full frontal rating crash into each other head on, but one vehicle weighs twice as much as the other, the occupants of the lighter one (2000 lbs / 909 kgs) are eight times more likely to be killed than the occupants of the heavier vehicle (4000 lbs / 1818 kgs). However, vehicle weight offers no safety advantage or disadvantage in single-vehicle crashes.

Weight Class Categories

3500 lbs / 1590 kgs or more
3000-3499 lbs / 1363-1589 kgs
2600-2999 lbs / 1181-1362 kgs
2300-2599 lbs / 1045-1180 kgs
Less than 2300 lbs / 1045 kgs

Keep in mind that crash test results shouldn't be compared among vehicles with large weight differences (more than 15%), so we have divided the vehicles into 5 distinct weight categories.

The weight we use is the specific weight of the vehicle used in the test that was conducted. Very often a differently optioned vehicle will weigh 10% more or less than the weight we've assigned to it. Please re-adjust the weight class category to meet the exact weight of your vehicle. Different engine, transmission, and accessory option packages can make a big difference. The weight class rating for a any given model is not set in stone.


this is what i mean about the weight ...
for more detail :

http://www.safecarguide.com/exp/weight/idx.htm
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marky
Club Founder


Joined: 12 Jul 2004
Posts: 2418
Location: Subang Jaya

PostPosted: Wed Mar 23, 2005 9:45 am    Post subject: Reply with quote

Good posting. But notice the last line "Please re-adjust the weight class category to meet the exact weight of your vehicle. Different engine, transmission, and accessory option packages can make a big difference. So weight is one of the factors we have to take into consideration.
The topic is very wide,best we understand one thing, more ppl and weight put into a vehicle, the higher the force needed to stop.

chankarchun wrote:
Weight Class - Statistics show that if two vehicles with the same NHTSA full frontal rating crash into each other head on, but one vehicle weighs twice as much as the other, the occupants of the lighter one (2000 lbs / 909 kgs) are eight times more likely to be killed than the occupants of the heavier vehicle (4000 lbs / 1818 kgs). However, vehicle weight offers no safety advantage or disadvantage in single-vehicle crashes.

Weight Class Categories

3500 lbs / 1590 kgs or more
3000-3499 lbs / 1363-1589 kgs
2600-2999 lbs / 1181-1362 kgs
2300-2599 lbs / 1045-1180 kgs
Less than 2300 lbs / 1045 kgs

Keep in mind that crash test results shouldn't be compared among vehicles with large weight differences (more than 15%), so we have divided the vehicles into 5 distinct weight categories.

The weight we use is the specific weight of the vehicle used in the test that was conducted. Very often a differently optioned vehicle will weigh 10% more or less than the weight we've **** to it. Please re-adjust the weight class category to meet the exact weight of your vehicle. Different engine, transmission, and accessory option packages can make a big difference. The weight class rating for a any given model is not set in stone.


this is what i mean about the weight ...
for more detail :

http://www.safecarguide.com/exp/weight/idx.htm

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chankarchun
General Member


Joined: 01 Mar 2005
Posts: 81
Location: penang

PostPosted: Wed Mar 23, 2005 1:03 pm    Post subject: Reply with quote

marky wrote:
Heavy vehicle does not mean better handling too. F1 cars are made light but low. There are many factors to take into consideration.


this point i agree with u.
but if u know sth call momentum then u know what is my story la...

heavier means tougher, steady ride, ....

marky wrote:
Good posting. But notice the last line "Please re-adjust the weight class category to meet the exact weight of your vehicle. Different engine, transmission, and accessory option packages can make a big difference. So weight is one of the factors we have to take into consideration.
The topic is very wide,best we understand one thing, more ppl and weight put into a vehicle, the higher the force needed to stop.


yup! this is wat we call inertial.
when heavy vehicle crashed on a light one, the light one is actually 8 times more danger than the heavy one. This is momentum. (m1v1=m2v2)

m1 = weight of car 1 (heavy) 4000lb
m2 = weight of car 2 (light) 2000lb
v = speed of car 1 & 2.

so,
m1v1-m2v2 = 0

in this case, m1 = 2 x m2
then, it must be, v1 = 0.5 x v2 (or) v2 = 2 x v1

the impact, we consider only the speed...
so the speed of vehicle 2 must be at least twice of vehicle 1, then in the crash, vec 2 won't fly away.
if the speed of v2 more than twice of v1, vehicle 1 will only move a bit which is due to the force from vehicle 1 and its own weight.

just like arnold punch me, i will fly~~~~ Laughing
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chankarchun
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Joined: 01 Mar 2005
Posts: 81
Location: penang

PostPosted: Thu Mar 24, 2005 4:56 am    Post subject: Reply with quote

hehehehe! still studying ma.
will go out to work soon. dunno whether can get job or not. hopefully can get lah. otherwise can not buy the car lor. Sad
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chankarchun
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Joined: 01 Mar 2005
Posts: 81
Location: penang

PostPosted: Thu Mar 24, 2005 5:11 am    Post subject: Reply with quote

just go to test drive the car.

when i suddenly press the pedal hard, it rev very high, and noisy, but in real life (3 yrs back, so this is the 1st time i drive for these 3 yrs) Very Happy i drove gently with my parents old civic.
the suspension is solid, i dun think it will hit bumps when we get over it.
handling is good, when i drove around 100 kmh and skipping in and out between lanes.
the semi leather seats are a little bit hard, may be it's for me only, coz i like soft one.
rpm only minor different with OD on/off. about 900 rpm. still can safe fuel.
when OD on, the pick up is better when rpm near 3000++.
when rpm less than 2500, pick up less power.

i didn't test for other thing, wat i need to test? some more?
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slbeh
Site Admin


Joined: 23 Jun 2004
Posts: 1696
Location: Kuala Lumpur

PostPosted: Thu Mar 24, 2005 8:46 am    Post subject: Reply with quote

chankarchun wrote:
just go to test drive the car.

when i suddenly press the pedal hard, it rev very high, and noisy, but in real life (3 yrs back, so this is the 1st time i drive for these 3 yrs) Very Happy i drove gently with my parents old civic.
the suspension is solid, i dun think it will hit bumps when we get over it.
handling is good, when i drove around 100 kmh and skipping in and out between lanes.
the semi leather seats are a little bit hard, may be it's for me only, coz i like soft one.
rpm only minor different with OD on/off. about 900 rpm. still can safe fuel.
when OD on, the pick up is better when rpm near 3000++.
when rpm less than 2500, pick up less power.

i didn't test for other thing, wat i need to test? some more?


just test drive the car ? Testing the power of the car when climbing up & down....I decided to buy accent because of this testing Razz
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soulkipper
Junior Member


Joined: 20 Jul 2004
Posts: 235
Location: Puncak Jalil

PostPosted: Thu Mar 24, 2005 11:49 am    Post subject: Reply with quote

slbeh wrote:
chankarchun wrote:
just go to test drive the car.

when i suddenly press the pedal hard, it rev very high, and noisy, but in real life (3 yrs back, so this is the 1st time i drive for these 3 yrs) Very Happy i drove gently with my parents old civic.
the suspension is solid, i dun think it will hit bumps when we get over it.
handling is good, when i drove around 100 kmh and skipping in and out between lanes.
the semi leather seats are a little bit hard, may be it's for me only, coz i like soft one.
rpm only minor different with OD on/off. about 900 rpm. still can safe fuel.
when OD on, the pick up is better when rpm near 3000++.
when rpm less than 2500, pick up less power.

i didn't test for other thing, wat i need to test? some more?


just test drive the car ? Testing the power of the car when climbing up & down....I decided to buy accent because of this testing Razz


Yup, that's right. U can feel when those fuzzy logic etc is working. Then try driving a car that dun have that capabilities. U can feel the different.
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