NCP10 Echo cutting through some Trackday traffic

[xnamerxx]

Originally Posted by RomanDave

I've got a C56+torsen and a Prius C motor+cams swap in the works, I've got most of the parts ready but it will still be a while off yet.

That was my fav motor, but there is very little clearance on the pistons for more cam duration so you may need to lock out VVTI. Also when you rev it to 7k you'll get ring flutter and burn some oil due to the ring tension being so light.

[RomanDave]

Originally Posted by xnamerxx

That was my fav motor, but there is very little clearance on the pistons for more cam duration so you may need to lock out VVTI. Also when you rev it to 7k you'll get ring flutter and burn some oil due to the ring tension being so light.

Yep will definitely need to do some careful checks on valve timing.

This motor has very low km (~50,000) and I've been doing some reading about the oil ring issue.

I wonder if this is caused in part by not just the low friction oil control rings, but how they get driven in a prius also.

As in, a lot of the time the motor doesnt run at all, and then you get lots of low load running.

I'm hoping this will be low enough km that putting lots of load on it and with good oil will keep the rings freed up.

Eventually I'll put some beefier rods in it, so probably makes sense to put normal 1NZ oil control rings on the pistons. But hopefully it will be not to bad in the meantime.