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 Proton PrevĂ© V2, Drive it to Believe it

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ckk125
post Mar 23 2012, 11:51 AM

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QUOTE(WhitE LighteR @ Mar 23 2012, 10:37 AM)
no really lo. same case seems to apply to bold. like their leaking oil issue is a first batch problem. only the 2012 batch is ok.

but like the one way valve issue is seems to be still no general recall. they only now begin to investigate and alto they found they problem, it seems like its not a general issue and was cause by the over tightening of the valve. but fixing it requires you to do something like a top overhaul where you have to bukak the top part to access the vvt area.
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that is why, my inspira will b my last proton.

even touch inspira suspension then have sounds, imagine engine.
ckk125
post Mar 23 2012, 12:08 PM

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QUOTE(WhitE LighteR @ Mar 23 2012, 12:03 PM)
the sounds is something that can be fixed, no?

for me if the issue can be fixed with warranty i am ok with it. i dont expect everything to be perfect like most ppl...
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haha..some can fix, some not. mine is one of those whose sounds cant be known.

the worse thing bout it is that the sound fluctuates, sometimes it is there, sometimes it isnt, which makes it very tricky to solve.

At least go for inspira, drivetrain is a proven one.
ckk125
post Mar 23 2012, 12:13 PM

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QUOTE(MR_alien @ Mar 23 2012, 12:12 PM)
if u service it properly...the problem will only come on the 7-8th year/around 200-250k KM
and thats is why when either the GB is broken/engine need some major fix and slap by mechanic by some magical number
ppl tend to just dump the car and buy a new one...and it is better to buy a new car cuz even after fix, u never know what else need fix
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aiya..cvt not that fragile lah.. at least for me. just use recommend cvtf and not those aftermarket ones and you'll be fine.

the only problem as it gets older is the time it takes to engage to drive/or reverse from parking during cold starts.


Added on March 23, 2012, 12:15 pm
QUOTE(dares @ Mar 23 2012, 12:12 PM)
To be fair, I was looking at Ford Fiesta when I read in their forums that certain earlier batches of the car have noisy gearboxes under certain operating conditions, and Ford seems to be looking the other way and pretend that nothing is wrong.

While I do agree Proton seem to be more prone to this kind of problems, it's not entirely accurate to single them out. At the end of the day, it all boils down to your luck, and whether your problem will be a cheap one or an expensive one.
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yea..it was a risk i knew when i bought the inspira, but as long as the drivetrain is good, i can slowly play with proton regarding the suspension sound.

This post has been edited by ckk125: Mar 23 2012, 12:15 PM
ckk125
post Mar 23 2012, 01:21 PM

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QUOTE(WhitE LighteR @ Mar 23 2012, 01:07 PM)
ic. probably a bushing issue. its correct that even with warranty its not easy to solve such issue because they are hard or almost impossible to diagnose. sometimes such sounds will go away after the bush start to wears down more.

this sounds abit like the dog bone issue that waja used to have. after a while thru trial and error ppl found out the source and know already wat to do.


Added on March 23, 2012, 1:12 pm
the gear thing you should check it out. but the petrol smell issue i've heard from other cars as well actually. again lo. thru trial and error see how other ppl solve it.

in any case i kindda expect the QC of proton to produce all this small2 nagging issue. after a while i stop feel surprise anymore. laugh.gif

as longs its not a critically fatal flaw.. like i say. im ok with it...
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haha...but it is not fun when your car is the 1st batch and no one else have the problem yet.
ckk125
post Mar 23 2012, 09:57 PM

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QUOTE(sAm fIsher @ Mar 23 2012, 09:53 PM)
time to upgrade to performance suspension?  brows.gif  brows.gif
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if it is the bushing at the control arms or lower arm, change suspension also wont make any difference..
ckk125
post Mar 28 2012, 10:21 PM

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QUOTE(ruffstuff @ Mar 28 2012, 10:13 PM)
I think Preve is the proper Waja replacement rather than Persona. It just that it came very late and Inspira took over Waja, but using new name.

I really hope Proton have a permanent car name for each segment. Persona name should remain as B segment, Preve as C and Inspira can be phased out.
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inspira was meant to be the high C and low D segment.


ckk125
post Mar 31 2012, 08:27 PM

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QUOTE(mat79 @ Mar 31 2012, 06:43 PM)
campro cps 125 hp 6.5k rpm 150nm 4.5k rpm, for at, powerloss on transmission 20%, manual, powerloss on trnasmission 12%

campro iafm+ 108hp 5750 rpm, 150nm 4krpm, for cvt, powerloss on transmission 6%, manual, powerloss on transmission 5%.

Count it urself how much hp n torque loss.

Normally, for any car, rule of thumb they need 80bhp pertonne minimum,higher the better. Thats why exora dont use iafm+ coz not enough hp even torque is better coz pulling power is enough, but will suffer at high speed. But for p3, it is sufficient enough. Of course, not as powerful as flx se, but for cvt is minimal coz infinite ratio. Only manual will suffer if they introduce flx se manual coz flx se manual can do around 10 scnd. P3, 12 scnd, but cvt flx se, 12 scnd, p3 cvt, 12.5 scnd, not much diff.

Thats why they choose cvt over conv at, not only for better fc, but easier for the engine to generate power coz the engine power is at ur right foot, always optimum according to the input. Example, need full torque, press pedal at 4k rpm from static, full torque is available all the way without any decrease of torque. While in at, even when u press 4k rpm on 1st gear, the next gear, the torque is reduce due to shifting n rev drop, n need to rise again to 4k rpm to achieve the full torque, it will happened,all the time, if have 6 speed, 6 times torque decrease n increase. If 4 speed, 4 times.

Not comparing with elantra pwrtrain. Just cps n iafm+.
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powerloss at cvt 6%? are you sure? how do u even determine that? as u said, the cvt is variable and it'll never get an accurate reading

how about inspira's cvt?
ckk125
post Mar 31 2012, 08:34 PM

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QUOTE(ben_panced @ Mar 31 2012, 08:28 PM)
he is an engineer working for proton lol
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6% power loss on a cvt is highly doubtful. if that is the case, inspira will smoke civic anyday, which is not the case.

saga flx will smoke honda city ivtec, which is not the case.
ckk125
post Mar 31 2012, 08:42 PM

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QUOTE(ben_panced @ Mar 31 2012, 08:37 PM)
your cvt is from jatco not ZF so powerloss is different..

case in hand:

MT from getrag 5% powerloss vs sucky MT from mitsu 12% powerloss
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jatco is the world's leading cvt manufacturer, they make for nissan, suzuki, mitsubishi. doh.gif even reviews say that the punch powertrain is not as smooth as the jatco's.

if what mr mat79 says is true, iafm+ only suffers 6% powerloss at the cvt, tell me why it is not even on par with city's ivtec, which is on a auto gearbox?

dont get me wrong, it is good to have a discussion on this..i agree to be disagreed.

This post has been edited by ckk125: Mar 31 2012, 08:43 PM
ckk125
post Mar 31 2012, 08:53 PM

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QUOTE(ben_panced @ Mar 31 2012, 08:43 PM)
furthermore the zf cvt unit is using single clutch while your jatco cvt is using torque converter..
so that is why the powerloss for zf cvt is quite minimal
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agreed on the torque converter part.

campro iafm+ 108hp 5750 rpm, 150nm 4krpm, for cvt, powerloss on transmission 6%, manual, powerloss on transmission 5%.

cvt = 94% of 108 and 150, 101.52hp, 141nm

honda city 20% transmission loss(quite consistant even on the civics)

80% of 118hp and 145nm = 94hp and 116nm torque

So saga flx is faster than city ivtec?

Saga 1080kg

City 1160kg

Saga flx 0-100 = 12.5 seconds

City 0-100 = 11.5 seconds.

By right the saga with less powerloss, lighter body will devour the city, but the figures doesnt tally, right?
ckk125
post Mar 31 2012, 09:01 PM

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QUOTE(ben_panced @ Mar 31 2012, 08:59 PM)
i tot saga is at 1.1 tonnes?
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the brochure says otherwise. smile.gif
ckk125
post Mar 31 2012, 09:43 PM

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QUOTE(V12Kompressor @ Mar 31 2012, 09:37 PM)
figures on brochure can be understated or overstated depending on manufacturer.

The Saga 1.3 FLX has a 0-100 of 14.5 sec printed on brochure, but on youtube there's already one doing 0-100 around 13 sec.
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the point is, 1.6 flx cant match the 1.5 but heavier honda city, which makes the statement of 6% powerloss at the CVT highly doubtful.
ckk125
post Mar 31 2012, 09:47 PM

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QUOTE(h4dRi @ Mar 31 2012, 09:46 PM)
honda city using short gear ratio perhaps
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if anything, the CVT can keep the rpm fixed at max power, as opposed to the shifting up and down of the honda city.

Therefore the powerloss cannot be as low as 6%
ckk125
post Mar 31 2012, 09:52 PM

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QUOTE(samwongjyhhorng @ Mar 31 2012, 09:48 PM)
i oso not agree that onli 6% power loss at cvt..maybe the preve/exora cfe/flx se owner can go to dyno to prove it..
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dyno cvt is useless. that is why im interested to know how they can get the 6% power loss.

that is why the lancers and inspira cvt can never get a consistent reading..the name also variable. smile.gif


Added on March 31, 2012, 9:53 pm
QUOTE(h4dRi @ Mar 31 2012, 09:50 PM)
what is the power to weight ratio for honda city compared to saga flx?
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based on the kerb weight and calculated power loss,(read my earlier post),

the saga has smaller tyres, lighter body, less powerloss than the city.

This post has been edited by ckk125: Mar 31 2012, 09:53 PM
ckk125
post Mar 31 2012, 09:58 PM

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QUOTE(V12Kompressor @ Mar 31 2012, 09:55 PM)
if everything is based on brochure spec alone, then those car magazine like EVO, Autocar etc don't need to do head to head shoot out already.

Furthermore manufacturer normally play around with different variables to obtain their desired result, including the "6% powerloss
then based on what? i believe kerb weight, engine output is fairly consistent. what we are trying to discuss here is the powerloss, which doesnt make sense

just be frank la.. 6% powerloss is too good to be true.


Added on March 31, 2012, 9:59 pm
QUOTE(ar188 @ Mar 31 2012, 09:55 PM)
theoretically cvt would win over a 5AT.. if weight same, and same engine with same engine poweroutput..
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and similar powerloss.

This post has been edited by ckk125: Mar 31 2012, 09:59 PM
ckk125
post Mar 31 2012, 10:04 PM

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QUOTE(samwongjyhhorng @ Mar 31 2012, 10:02 PM)
or try get one city drag wit flx se..then can c d difference lo..
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haha..cuz doesnt make sense lo..6% powerloss...DSG can discontinue lo
ckk125
post Mar 31 2012, 10:21 PM

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QUOTE(Nightstalker1993 @ Mar 31 2012, 10:11 PM)
Tell me then where would the power loss be? IINM, the cvt in the Preve is using a wet clutch based system instead of a torque converter which is far from efficient. Power transferred to the clutch, then the cvt itself which runs on a metal belt which relies of compression of the belt instead of tension. I'm not really that surprised actually that the powerloss is low. Main reason why automatics have huge powerlosses is due to the torque converter anyway so if you can get rid of that, problem solved.



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loss as heat. even the belt itself loses power. i dont know if u forgot, cvts are very very prone to overheating.

even with the start up clutch cvt, 6% is way way way too good to be true. trust me. my inspira, honda city(also a clutch cvt) and dad's prius uses cvt
ckk125
post Mar 31 2012, 10:50 PM

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QUOTE(izputra @ Mar 31 2012, 10:32 PM)
Errr..back to the topic shall we?..more discussion on the Preve please. Now this thread already became a serious never ending talk about power losses on CAT, CVT, DCT or whatever transmission. Only God knows the exact figure of power losses in whatever transmission. Doesn't matter which car tapau which car. If tapauing other cars is our main concern, buy a real sports car then..lol
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lol..cvt is not a part of the preve? if dont talk about the drivetrain then talk about what?

it is not about tapau, it is about efficiency. same goes to the forte and 308 turbo, when it was on the 4 speed, it was lethargic, but on the 6speed, a big difference.

doh.gif
ckk125
post Mar 31 2012, 10:52 PM

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QUOTE(izputra @ Mar 31 2012, 10:48 PM)
Hehe..they should work as an automotive engineer & design for us a better & more efficient engine & GB then  tongue.gif
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lol..then go ahead and believe that cvt has 6% powerloss. then another xioncity will be borned.

sometimes, it is good to analyse the info before swallowing it down.
ckk125
post Mar 31 2012, 10:56 PM

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QUOTE(zariel @ Mar 31 2012, 10:55 PM)
saga flx 0-100kmh is 2 seconds slower than the preve based on the brochure, 12s in saga against 9.5s in preve..

i feel that the one in the proton's brochure has somewhat underestimate the power of the engine... 9.5s is slower than the lotus neo which is at 9.2s... and i do feel the same with 12s saga flx... maybe they use eco mode on the saga gearbox during the test with translate to the higher time taken to sprint from 0-100kmh...
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there is no eco mode on CVTs, there is just a warm up mode.

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