prius c 1nz swap

[Zedicus]

1 year on update:

car runs really good, no check engine lights or any issues...EXCEPT!

The stage 1 EXEDY clutch is absolutely TOAST. on 3/14/2021 i pulled the trans and replaced the exedy with a McLeod Street Elite. i wish i would have taken pictures but i was in a borrowed garage and just did not have time. The exedy disk surface was not too bad but had been very hot, the hub and springs were trashed. the springs had been stomped mercilessly and were crushed and nearly falling out of the housing. even the splines in the hub showed significant wear. the pressure plate had gotten hot enough to deform and cause the through out bearing to ride and groove it. THANK HEAVENS i had put a fidanza flywheel in last time, it had gotten warm but was still fine.

if you do a similar engine build rather it is complete prius, or prius rotating assembly you MUST get a GOOD clutch. the EXEDY stage 1 is rated for +30% HP over stock and it slipped almost instantly. i nursed it and got almost 1 year out of it. the new McLeod clutch makes the car feel amazing, 2nd gear chirps the tires just messing around, first gear makes me wish i would have put an LSD in it while it was apart. the McLeod is rated for +50% to 70% more HP, has a massive hub and spline area, and much higher clamp load. there is a little more clutch feel at the peddle, if that bothers you, well too bad.

after the last couple months of nursing the clutch, the little toaster is exciting to drive again. watch out CIVICs, the streets are MINE.

NOTE: due to location, mostly it is guys in diesel pickups that always want to race me.

Originally Posted by RomanDave

Thanks for the posts, Zedicus!

I'm planning on doing this soon but with aftermarket ECU and some ITB.

Prior to reading this I would have been caught off gaurd about the sump swap, but managed to get one in advance.

I've seen big power gain just from ECU and intake swap on a standard 2NZ, so looking forward to what a high comp 1500cc setup is capable of with a good tune.

It's amazing how much the standard plenum and throttle body is a huge bottleneck on these engines.

with the slipping clutch i have avoided doing ANYTHING that might increase HP more. Now that the clutch is fixed i will be doing an intake and exhaust sometime this summer. and hopefully i can make it to a dyno in Denver. i am going to play dumb and when it shows 130hp to the wheels or something crazy for a 1NZ i will just nod and say cool, and drive off.

[J_Shabang]

Originally Posted by Zedicus

1 year on update:

car runs really good, no check engine lights or any issues...EXCEPT!

The stage 1 EXEDY clutch is absolutely TOAST. on 3/14/2021 i pulled the trans and replaced the exedy with a McLeod Street Elite. i wish i would have taken pictures but i was in a borrowed garage and just did not have time. The exedy disk surface was not too bad but had been very hot, the hub and springs were trashed. the springs had been stomped mercilessly and were crushed and nearly falling out of the housing. even the splines in the hub showed significant wear. the pressure plate had gotten hot enough to deform and cause the through out bearing to ride and groove it. THANK HEAVENS i had put a fidanza flywheel in last time, it had gotten warm but was still fine.

if you do a similar engine build rather it is complete prius, or prius rotating assembly you MUST get a GOOD clutch. the EXEDY stage 1 is rated for +30% HP over stock and it slipped almost instantly. i nursed it and got almost 1 year out of it. the new McLeod clutch makes the car feel amazing, 2nd gear chirps the tires just messing around, first gear makes me wish i would have put an LSD in it while it was apart. the McLeod is rated for +50% to 70% more HP, has a massive hub and spline area, and much higher clamp load. there is a little more clutch feel at the peddle, if that bothers you, well too bad.

after the last couple months of nursing the clutch, the little toaster is exciting to drive again. watch out CIVICs, the streets are MINE.

NOTE: due to location, mostly it is guys in diesel pickups that always want to race me.




with the slipping clutch i have avoided doing ANYTHING that might increase HP more. Now that the clutch is fixed i will be doing an intake and exhaust sometime this summer. and hopefully i can make it to a dyno in Denver. i am going to play dumb and when it shows 130hp to the wheels or something crazy for a 1NZ i will just nod and say cool, and drive off.

Do you still have this xB? I have one and would really like to follow in your footsteps. Could I use the 1NZ-FE block with the FXE cylinder head and pistons?

[Zedicus]

Originally Posted by J_Shabang

Do you still have this xB? I have one and would really like to follow in your footsteps. Could I use the 1NZ-FE block with the FXE cylinder head and pistons?

it is still my daily. i did get some bad gas on a trip to denver and it caused some overheating and detonation and hurt the middle 2 pistons a little bit. but even with the internal damage i have still been driving it.


sorry all, i am not on here much but i will post some info about things i have been asked momentarily.


NOTE: the FXE valve springs are SOFTER, you will get VALVE FLOAT at 6100RPM or there abouts. use aftermarket or at least the Yaris ones. VALVE FLOAT IS BAD WITH VVT OPEN!!!

NOTE2: i had some questions about the ARP studs. hopefully you all figured it out, if not here is what i can say. if you are using ANY OEM cam, they will hit somewhere. and there are some different VVTI solenoids, some hit, some do not. basically you have to install the studs and see what hits and trim what needs trimmed. it is a long process.