How many seconds do you think such a mod will help acceleration ? - Toyota Yaris Forums

nurburgring · 07-31-2007, 10:36 PM

Currently, I'm on 195/50R 16s, 16x7" rims. Probably 11 pounds or so a rim. I'm also on stock pulleys.

I have little to no intention of compromising reliability, so I will not go forced induction, whatsoever. WHat I'm keen in is, to increase efficiency of power delivery to increase acceleration.

SO...

What if I went, 195/55R15, 15"x6.5JJ 9lb rims. This will reduce rotating mass by over 6 lbs inclusive of a lighter tyre. I will also change the pulleys to one of those lightweight aluminum variants. I will change my engine oil to 0w-40w Mobil 1. And if need be, thicken my autotransmission oil, and remove the 20kg or so sitting in my boot.

Do you think I will be able to reduce my acceleration from the current 11. something seconds to a sub ten ?

I have no intention of a cold air intake, because frankly, I've got that route before and I think in an automatic, it sucks. A big torque hole.

*Astroman* · 07-31-2007, 11:45 PM

Hey, I raced my auto on the quarter mile and had a blast, even though I lost every time.

I went with a NST CR-lite pulley and a TRD exhaust and I got a 17.356. No intake either. I did remove my extra seats, spare tire, jack, etc. A good thing to do with this car is ditch the weight.

nurburgring · 08-01-2007, 01:35 AM

No I dont race professionally in any sense. But I do take the car on the track when I can. I admit automatics are pretty senseless to track, but still it is great fun.

I do not have much issues keeping Swift Sport drivers in manual transmission behind. Not saying that I'm good, but on the track, transmission is only one out of the many factors to a good track time.

I bought an automatic only because my mum or my gf can take the car out anytime, and I'll have a peace of mind that they dont stall and cause an accident.

07-31-2007, 10:36 PM	#1
nurburgring ringmeister Drives: YARIS 1.5 Join Date: Mar 2007 Location: Singapore Posts: 80	How many seconds do you think such a mod will help acceleration ? Currently, I'm on 195/50R 16s, 16x7" rims. Probably 11 pounds or so a rim. I'm also on stock pulleys. I have little to no intention of compromising reliability, so I will not go forced induction, whatsoever. WHat I'm keen in is, to increase efficiency of power delivery to increase acceleration. SO... What if I went, 195/55R15, 15"x6.5JJ 9lb rims. This will reduce rotating mass by over 6 lbs inclusive of a lighter tyre. I will also change the pulleys to one of those lightweight aluminum variants. I will change my engine oil to 0w-40w Mobil 1. And if need be, thicken my autotransmission oil, and remove the 20kg or so sitting in my boot. Do you think I will be able to reduce my acceleration from the current 11. something seconds to a sub ten ? I have no intention of a cold air intake, because frankly, I've got that route before and I think in an automatic, it sucks. A big torque hole.

07-31-2007, 11:45 PM	#2
Astroman Modded Moderator View User's Garage Drives: 07 Toyota Yaris, 71 Galaxie Join Date: Mar 2007 Location: Wenatchee, WA Posts: 3,670	Hey, I raced my auto on the quarter mile and had a blast, even though I lost every time. I went with a NST CR-lite pulley and a TRD exhaust and I got a 17.356. No intake either. I did remove my extra seats, spare tire, jack, etc. A good thing to do with this car is ditch the weight. __________________ Please visit my online store for computer stuff and Official Yarisworld decals!

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08-01-2007, 01:35 AM	#3
nurburgring ringmeister Drives: YARIS 1.5 Join Date: Mar 2007 Location: Singapore Posts: 80	No I dont race professionally in any sense. But I do take the car on the track when I can. I admit automatics are pretty senseless to track, but still it is great fun. I do not have much issues keeping Swift Sport drivers in manual transmission behind. Not saying that I'm good, but on the track, transmission is only one out of the many factors to a good track time. I bought an automatic only because my mum or my gf can take the car out anytime, and I'll have a peace of mind that they dont stall and cause an accident.