"Scary" experience @ AMK Hub today...
 

Was at AMK hub this morning and for bros who are not familiar with the carpark, it is the winding type similar to Taka.

On my way out which I had to ascend the wet slope (from an earlier heavy rain), I actually got into a situation where I was just revving on the spot and moving by inches after 5 to 10 secs of revving. I had to pause and retry this stunt for at least 5 to 10 times despite the smoke n burnt rubber smell from my rear tyres.

Any advice what could be wrong or this is really normal for our ride which is kinda scary cos I never had such experience on my previous ride.

FYI, I'm on a 1 week old Toyo T1R (225/50/R17). Ride is stock 4AT.

dont quite understand your description... ... did u check ur handbrakes? though u didnt really say how you managed to go out in the end? It sounds like as if ur rear tires were only just barely touching the ground but that's also strange because with 200+ bhp.... u are bound to move off. Maybe ur gear didnt engage? Then again also dont make sense if indeed the rubber smell thing was true....

really queer....

BTW.. what's a Toyo T1R? heh...

Usually happens to manual car only......did you floor your accelerator too much causing wheel spin whereby your car is "running on the spot"? Strange :Eyecrazy: Maybe your DSC is off?

i think most 4AT gt no dsc.

Take a look at the Surface of the slope that u are ascending .

If its those light grey colored cement type with small circles (the size of your palm) imprint onto the surface, then its quite normal. cos they can be very slippery when its wet.

It order to prevent your car from moving backwards while climbing, u will have to use Gear 1 and travel very slowly. if your tires spins too fast, u will find that your car will have problem moving upwards and worst the car will start to move backward.

It has nothing to do with DSC or Manual or Auto Gear cars.
It will happen to all cars, who are trying to travel abit faster upslope when the surface is wet.

Even my 1.7 tons Hyundai Trajet tend to slip backwards.

think toyo is the same tyre they used in Fast & furious.. help you drift in the carparks...jus like the movie, spin up the circular ramp :) :)

I was in my gear 1 and the speed i was travelling was definitely not fast as i was keeping a real safe distance having heard all the horror tales of RWD ride on wet ground.

Other than the scare factor, it's really the disappointment when all other rides from the vios and getz in front me n the camry behind had no problem at all. Was discussing with another fren on Toyo T1R this morning and he said that happens to him a few times even on very gradual wet slope in MSCP. Hence my conclusion is that it might be the tyres. Should've insisted on the Eagle F1 which I'm so comfortable with when the tyre shop told me it's out of stock :(

t1r is good, but u have to wear in the tires first...they have immense grip level, similar to that of AD07s

I dunno if this is a similar problem and i hope its nuthing serious.....just got my ride for 2weeks...a 6AT....

anyway i was travelling up the highway and slowed down from 120 plus km/h to around 90plus km/h as i approach some speed camera.....after i pass the speed camera, i stepped on the accelerator again...this is the part where the highway goes slightly up slope....but there seem to be a sudden loss of power....it was like on 80 plus to 90 plus km/h for the longest time....some car behind was geting pissed at me thinking i was hogging the lane.....

the power came on back again after like what seemed like maybe 20 secs?? and i managed to get the car accelerating again....

I think i know what happen.

My sis rav4 in mel has the same problem; there a problem with the torque converter. There will be aloss of power upslope.

Never had that issue with my T1R's bro - sounds like you just needed to run them in first.

A sudden acceleration could've caused this if on a slippery road.

The other contributing factor is, the tyres were probably slightly over inflated, rubber had minimum contact with the ground than if it's correctly inflated...2cents...

I've clocked around 500km since then n i'm glad that it seems to be a one-off exception perhaps bcos my tyres are too new. But a fren of mine commented that tyres these days need not be run in based on how the F1 cars could change tyres at a pitstop n corner like there's no tmr seconds later. Wonder how true is this?

But frankly speaking, i doubt i'd ever want to go to AMK hub on a rainy day unless absolutely necessary.

Just for the record...even F1 tires need to be warmed up before achieving maximum traction.

Thats why they always run a few laps first before going for it on their 'hot lap' during qualifying.

just to add that the tyres used for pitstops are typically scuffed (or even scrubbed in some cases) in advance and wrapped in heat blankets to maintain optimum tyre temp.

unless tyres manufacturers found a new way to mould tyres, running-in of tyres are here to stay.

Oic... i better let my fren knows before he continues to mislead more ppl... haha!

Hi Jeronlee, I just read about your "scary" experience and I think it's quite similar to driving up a slope on 'black ice' (roads where a thin film of ice is formed on its surface). Although it could be your new tyres, I believe it was your anxiety which made you throttle excessively in such a situation. By doing so, your rear driving wheels (easily) lost traction and spun freely on the wet surface. The more anxious you were, the more you 'gassed' your throttle resulting in more wheel spins and zero traction, esp. when you engaged your first gear when doing so.

You could have corrected it by: first applying your handbrakes to rest the car and stop throttling (stepping on the accelerator); then shift into second gear and gently step on your accelerator as you release your handbrake. You must really be gentle with your throttle input. This way you will likely be able to move the car up the slope. On some auto boxes it may not start on second. In which case you have to accelerate even more gently.

By resting your car up the slope you reset the gravity (due to the weight distribution of your car on the incline) to more weight on the rear wheels, providing the vital force on your rear tyre patches. By going into second gear you cut down on the torque applied to the driving wheels thereby preventing the wheel spin. The more power the car has, the higher the tendency the wheels will spin, esp. on wet road surface in the lowest gear.

In wet uphill climbs the low-powered cars fare better. Rotary engines can rev up so easily and its max torque's rpm is higher than most ordinary engines'.

Hope my long-winded post does not bore you. Cheers,

Thanks for taking the time to write such a detail posting on the right way of moving off a wet slope.

Mine is an auto so it din occur to me to start from 2nd gear. I did pull the handbrake though but u were right that i might have throttle excessively as i could feel my ride rolling backwards once the handbrake is released.

Thanks again for the tips n would certainly bear this in mind though i'd rather not have the opportunity to try out the technique :)