DIY - 1.8L 1ZZ-FE TB Connector Chip Swap

[dallas]

How much bigger is the new throttle body opening than the intake it bolts to, as the intake side may become the restrictor? From the picture it looks like it has a step so you can't really port match it to the new throttle body.

[Yaris T-Sport]

Originally Posted by Jerkratt

would the TRD CAI fit over the TB opening or would i have to "Lip" it?

I'm very sure you can, the other memeber has an TRD intake and he has been running with the new tb.

Originally Posted by dallas

How much bigger is the new throttle body opening than the intake it bolts to, as the intake side may become the restrictor? From the picture it looks like it has a step so you can't really port match it to the new throttle body.

the pic of the my OEM tube has already been ported .25" bigger

1nz = 2"

1zz = 2.25"

just a report back it's been 11 days since ,my chip swap, cold start idle is around 2000 RPM instead of 3000 before, drops down to around 1000 in a couple of mins, when the car is fully warmed up, it idles at 750 RPM, no CEL the whole time, very happy with the extra mid-nigh end gain, can definitely feel the difference by my butt dyno even off the line, much better mod than an intake or exhaust if you can find one cheap, perhaps I couldn't even feel a difference when I upgraded my intake nor exhaust alone by my but dyno expect the increase of engine noise, but this one, I surely CAN.

[YarisSedan]

Originally Posted by dallas

How much bigger is the new throttle body opening than the intake it bolts to, as the intake side may become the restrictor? From the picture it looks like it has a step so you can't really port match it to the new throttle body.

I am thinking the same thing.