Just got me a Yaris - A big hello and some questions. - Toyota Yaris Forums

Beer Jammer · 05-05-2010, 09:50 AM

Hi All.

I put a post on the new Yaris Purchase forum, and I'll post these questions here to put them in the right forum and avoid a big bump.

I did quite a bit of research before buying, I got the 1.3SR, mainly because there were no decent TS' for sale within 100miles.
Right onto the questions, sorry for the long post,

. I did do a search on a couple forums, and already found out the basics for a bit of improvement in the engine bay, namely better breathing to start with (intake and exhaust), perhaps a Greddy or unipart ECU and for good measure an aftermarket earthing kit will help.

I did try a Daihatsu Sirion Rally 2, which for those unfamiliar uses the Yaris' 1.3 VVTI but has a few tweaks to bring it up to around 107Hp and a 0-60 of around 8 secs. See here:http://www.parkers.co.uk/cars/specs/...px?deriv=24070I didnt choose this car because the yaris will keep its value better and is far more popular (and doesnt look like a diseased pig

but thats a personal opinion). Looking at what they did to it, they changed the exhaust cam profile, added a 'free breathing' air box/filter and used a different exhaust. In theory then, if I pop off to the local Daihatsu dealer, (I actually live 2 miles from one) I can buy these parts and swap them out to get close to the same from the engine. I know there is no difference in ECU specs, as the tuning company behind the Rally 2 are quoted as saying they tried all manner of ECU configurations, but it always re-adjusted itself back... so they left it alone and got the gains elsewhere.

So does this sound plausible, or does any of the vast yaris experience here think its a lost cause, or just easier to buy induction kits/ehausts from respectable sources?

yaris-me · 05-06-2010, 03:21 AM

Wouldn't be easier to buy a Daihatsu Sirion. You would have warranty, etc...

Beer Jammer · 05-06-2010, 07:08 AM

I could, but as I said in the post it looks terrible, has a less than good image and wont be as easy to sell on as a yaris.

I cant deny the Sirion Rally 2 is a stonking drive .... but its a Daihatsu.

ozmdd · 05-09-2010, 11:20 AM

CAI, underdrive-pulley, axle-back exhaust. That will gain you roughly 10-15% HP over stock. Next, get some VERY LIGHT wheels, which allow the motor to work less to wind-up your tires (unsprung weight is your enemy.)

Beyond that, you are throwing-away money relative to a 1.5 or TS Yaris if you want more HP, IMHO. A stand-alone or piggy-back ECU woudl onyl make sense if you are going forced-induction. If you are willing to spend that $$, you should have just bought a TS.

05-05-2010, 09:50 AM	#1
Beer Jammer Drives: Yaris 1.3 SR Join Date: May 2010 Location: Somerset Posts: 29	Just got me a Yaris - A big hello and some questions. Hi All. I put a post on the new Yaris Purchase forum, and I'll post these questions here to put them in the right forum and avoid a big bump. I did quite a bit of research before buying, I got the 1.3SR, mainly because there were no decent TS' for sale within 100miles. Right onto the questions, sorry for the long post, . I did do a search on a couple forums, and already found out the basics for a bit of improvement in the engine bay, namely better breathing to start with (intake and exhaust), perhaps a Greddy or unipart ECU and for good measure an aftermarket earthing kit will help. I did try a Daihatsu Sirion Rally 2, which for those unfamiliar uses the Yaris' 1.3 VVTI but has a few tweaks to bring it up to around 107Hp and a 0-60 of around 8 secs. See here:http://www.parkers.co.uk/cars/specs/...px?deriv=24070I didnt choose this car because the yaris will keep its value better and is far more popular (and doesnt look like a diseased pig but thats a personal opinion). Looking at what they did to it, they changed the exhaust cam profile, added a 'free breathing' air box/filter and used a different exhaust. In theory then, if I pop off to the local Daihatsu dealer, (I actually live 2 miles from one) I can buy these parts and swap them out to get close to the same from the engine. I know there is no difference in ECU specs, as the tuning company behind the Rally 2 are quoted as saying they tried all manner of ECU configurations, but it always re-adjusted itself back... so they left it alone and got the gains elsewhere. So does this sound plausible, or does any of the vast yaris experience here think its a lost cause, or just easier to buy induction kits/ehausts from respectable sources?

05-06-2010, 03:21 AM	#2
yaris-me Learn to Relax Drives: 2007, Meteorite, LB Join Date: Dec 2008 Location: Anaheim, CA Posts: 2,070	Wouldn't be easier to buy a Daihatsu Sirion. You would have warranty, etc...

05-06-2010, 07:08 AM	#3
Beer Jammer Drives: Yaris 1.3 SR Join Date: May 2010 Location: Somerset Posts: 29	I could, but as I said in the post it looks terrible, has a less than good image and wont be as easy to sell on as a yaris. I cant deny the Sirion Rally 2 is a stonking drive .... but its a Daihatsu.

05-09-2010, 11:20 AM	#4
ozmdd Reluctantly Crouched... Drives: 2008 Yaris HB M/T Join Date: Oct 2008 Location: DFW, TX Posts: 867	CAI, underdrive-pulley, axle-back exhaust. That will gain you roughly 10-15% HP over stock. Next, get some VERY LIGHT wheels, which allow the motor to work less to wind-up your tires (unsprung weight is your enemy.) Beyond that, you are throwing-away money relative to a 1.5 or TS Yaris if you want more HP, IMHO. A stand-alone or piggy-back ECU woudl onyl make sense if you are going forced-induction. If you are willing to spend that $$, you should have just bought a TS.