Yaris approaching 50mpg life time average

[trikkonceptz]

Try this site for starters .. VG Shark Fin Antenna - Home

Good Luck ..

[redyaris]

With winter aproaching and temperatures droping I may not get there this year. For now I have got ro 49.09mpg life time. I will be making more modds to the underbody this winter so that winter mpg do not drop as much, and next summer mpg is better than this past summer. I have been reading Hucho aerodynamic... and realise that the wheel wells are an area of potential that is missed on my Yaris. The other project that may get done this winter is a new hatch door with Kammback. I will price out the cost of a new and used door soon then make plans...

[Niner]

I had an '07 Yaris sedan MT. I loved that little car... 40+ MPG with absolutely no mods, driving agressively 70mph on my way to work. I have this dream of swapping out the final drive from a Yaris transmission into my xA, to get that steeper gearing. I'll probably just wait and buy a Yaris when I kill this car.

[redyaris]

Let the quest begin a-new, my mpg numbers are back into the low 50mpg range again and the Lifetime average is beginning to climb towards 50mpg. I have not done most of the things I said I would do last winter because I am working on the Suzuki GS500 trying to get to a level that would allow me to get close to the Vetter challenge standard; 80mpg Plus. What I may be able to do this summer is a small Kamm back on the rear door, and rear wheel well covers. These mods plus better hypermileing should do the trick.

[piers.singer]

Great figures, Red! Good luck with the Suzuki too, look forward to seeing some good numbers for that.

[SentraSE-R]

I don't know, Red. I've got less to go than you, and it's going to take a string of about ten 55 mpg tanks to get me there. Good luck!

[vtec-e]

Redyaris, i would like to know how you attached the undertray to the car. I was thinking of rivnuts but they entail drilling the chassis, something i am not keen on. Also, how did you finish the front end of the rear undertray, where it meets the rear axle. I see you didn't use the tow hook anchor points to fit the rear undertray as i see the tow hooks sticking out a little through the undertray. Did you simply screw it to the bumper? Mine is the mk1 yaris and the lowerpart of the bumper is metal and not straight. But it does have two m6 holes to attach the bumper.
I had an attempt at an undertray before but it didn't deliver any mpg gains. Mind you, my tanks at the time were lasting 4 weeks and the weather changes a lot here. So i wouldn't see under 5 mpg and attribute it to a mod with confidence. But i like your workmanship. More pics please!!

[redyaris]

Originally Posted by vtec-e

Redyaris, i would like to know how you attached the undertray to the car. I was thinking of rivnuts but they entail drilling the chassis, something i am not keen on. Also, how did you finish the front end of the rear undertray, where it meets the rear axle. I see you didn't use the tow hook anchor points to fit the rear undertray as i see the tow hooks sticking out a little through the undertray. Did you simply screw it to the bumper? Mine is the mk1 yaris and the lowerpart of the bumper is metal and not straight. But it does have two m6 holes to attach the bumper.
I had an attempt at an undertray before but it didn't deliver any mpg gains. Mind you, my tanks at the time were lasting 4 weeks and the weather changes a lot here. So i wouldn't see under 5 mpg and attribute it to a mod with confidence. But i like your workmanship. More pics please!!

Where ever possible I used existing holes and did minimal drilling into the unibody frame. when I did have to drill into the frame I primed and painted the hole and then use silicon on the screw and hole to minimize rust potential. The front end of the rear undertray is attached to a bracket that is attached to some existing holes in the body at the bottom of the spare tire compartment. The back end of the rear undertray is tucked in above the leading edge of the plastic bumper on my Yaris and retained by some screws into the aluminium sheet through existing holes in the bottom of the bumper. I never bothered to test each modification I did because what I was Looking for was a trend in my fuel log. I accepted as fact all of the reading I have done on the matter of aerodynamic drag. My dream is to get into the 3.?L/100km zone some day... boat tail...

[redyaris]

It is now September 2011 and my 9o day average is 54.97mpg and the big change is in driving methods. I am doing LOG ing and the mpg numbers have jumped by about 10mpg, so that now I can average 60+mpg per tank and am now working on a 1000km tank, on 40L of gas or less. The hard part is waiting for the next fill up at over 1000km, it should take 2 weeks...

[SentraSE-R]

??? It looks like your lifetime FE is just 47.03 mpg.