My Yaris accelerate too slow !!! any suggestions ??

[Jack Yak]

Originally Posted by Motorhead6T5

Your transmission could be slipping from heatin it up doing top speed runs. If you want to drive that fast you should get a m/t car. Or at least a big fat transmission cooler. Heat kills automatics.

Im pretty sure its the wheels though.

i know that M/T is better for acceleration and top speed runs

but i thought here's different case !!

i mean that i used to accelerate to 180 km/h and nw i could not do that !!

Originally Posted by willygoodness

hrmmm for me.... using the stock wheels and a gps speedo, at gps 110km/hr the speedo reads 113. using bigger wheels, speedo reads 106 at gps 110 . bigger tyres are 205/35/18. stock wheels are what ever comes standard on a Yr 1.3


and using the bigger wheels I couldn't get to the same high speed as the stock wheels on the same bit of road on the same night. I wasn't using the gps speedo tho


also. IMO.. 2inch is 'big' exhuast for 1.3L usually for a 1.8 or 2L NA motor. But if it feels like a difference. it makes a difference :)

hrmmm. do u have a cold air intake/pipe going to your airfilter? I"m not sure what comes with the short air ram kits. Maybe the radiator has more heat blowing over the air filter?? eh?

you sure that 2" inch is a "big" exhaust for 1.3 !! ? stock tubes was about 1.25 i thought

then when you are about to upgrading the exhaust you should increase the tube 0.5 inches !! so it should be 1.75 inches !! ??

my intake is something like this

http://www.youtube.com/watch?v=8wUXhlZWIfg