nice setup! thats quite a big gain you got on your system ? what engine do you have ? the 2ZR-FE ?
Comparing your one (without CAI, header) and johnnieboi's one http://au.toyotaownersclub.com/forums/index.php?app=core&module=attach§ion=attach&attach_rel_module=post&attach_id=15718
Both start to lean from 4-6k rpm, and compare the one with Yaris stock
http://moe.rampage-guys.net/stuff/toyota/stokt07/palme_yaris.pdf (German, use google translate to change to english)
It also lean from 4-6krpm
Not sure if it is evident enough to show the lean is not due to incorrect AFR ratio, or otherwise the stock curve should not lean from 4-6krpm...
Also, not sure if it is related with torque, because our car has maximum torque around 4krpm
With the cat convertor sitting so close to the header, I wonder whether it is a limiting factor as well, I need more research on this..
PS John and others, I am not using factory resonator (torpedo), with the cat back, they gave me another one
thanks for the great info. very interesting findings. i have a greddy info touch hooked up to my one , i will check what the AFR is like under load and under hi speed pulls.
i see in a local performance magazine they have listed dyno figures for the 2zr-fe with a exhaust , the claim approx 8 kw and 11 nm increase , im not sure on the pipe size or if that includes header and maybe a de-cat , but i will call them tomorrow and find out what that all includes.
it seems the 2zr-fe has very good flow and reacts well to minor changes , i currently have a K&N typhoon intake on order for my yaris TS , they claim a 5 HP increase , here is the link
http://www.knfilters.com/search/product.aspx?Prod=69-8615TS
so i will check and see how it works on my 2zr-fe.
it would be so cool if they made more supercharger kits and other engine upgrades available for the car , as the Bemani one is really pretty pricey , but it makes great power.
i only have a 57mm pipe increase from the OEM middle resonator and a megan racing rear jap can , it seems to work really well , but im thinking about replacing the OEM middle box and maybe a 2nd cat removal , as the second cat comes after the sensor , so no cell's ;-) ... but im wondering if it will be worth it or if it will affect back pressure badly ?
i have heard that the cars are designed with a certain amount of back pressure needed , so will messing around with the exhaust system to much cause damage or power loss ?