RomanDave's Prius C swap

[Neinris]

Originally Posted by RomanDave

Are you asking about my motor?

If so:

-No rev limiter currently. Until I've got some stronger rods I'll likely set the rev limiter somewhere around 8200-8300rpm.

And yes in this case, swapping to the C56 gearbox is an absolutely magical upgrade. Having the 4.3 final drive instead of the 3.5 makes the whole thing so much better. I'd not be suprised if my 1300cc motor would have been into the 15 second quarter mile range with the C56 box.

The individual ratios of the C56 are most excellent. On the shift from 2nd to 3rd, shifting at ~8800rpm it drops down to only around 6500rpm on gear change.
So it stays in the powerband awesomely.

Attachment 61804

As for the purpose of this car, it's not a daily driver anymore as I've got a work car. But it still returns fairly decent milage, the high compression actually makes it decently economical.

I've been getting somewhere around 5.5-6 litres per 100km. So thats somewhere around 40mpg.
I could still get it a little better with optimizing the ignition timing further, will get there eventually.

That is awesome information! Do you get the Scion xD equivalent in New Zealand? It has a final gear drive of around 3.94, might be something to look into. The xB1, xD, and Yaris all have the same 1st to 5th gear ratio, just different final gear ratio, 4.31, 3.94, respectively and the Yaris here have 3.72, not 3.5 like you mentioned.

I wish I know how to tune the ECM, because I have another "Frankenstein" in mind.