I know this has been covered, and i have searched the point is with all the here and there about 2zz, and 1zz i feel that the prius bottom end is lost in all the threads. Can someone tell me
1. what to expect in power gain/ and compression
2.fitment as far as mounts
3. would this make the ist more bulletproof ( knowing that what we have is not, talking about 8psi-10psi with higher compression pistons/conrods.
4.Guessing this would this benifit NA as well as F/I
5.Price and year on that bottom end

I know that standalone will be a must which reminds me how do you get a base map from a complete standalone ems once the swap is done? Do you just start from scratch on the dyno? I thank you for your help


Thanks

 

no one knows ha

 

nope. i've pondered it. i'd use the regular 1nzfe block and just switch pistons.

 

I appreciate your answer

 

I think Darren and myself are the ones that have given this the most consideration. While he would prefer to tear down the motor and swap out pistons, I would be more likely to swap the entire bottom end.

From what I understand the motor should bolt right up to the stock transmission and chassis. You would however, want to use the stock head from your 1NZ-FE instead of the 1NZ-FXE head from the Prius.

Compression ratio with this setup should be very close to the Prius' 13:1. (This number is decreased in the Prius due to the car using the Otto cycle instead of the more traditional Atkinson cycle.) This higher compression ratio should mean pretty decent n/a power gains, but would pretty much prohibit any chance to go forced induction.

And yes, a stand alone would be your best bet. Before you even consider doing this swap, you will want to find a competent local tuner who can do a complete stand alone tune from square one. It would also be a good idea to find an experienced motor builder to compare the 1NZ-FE and 1NZ-FXE to make sure you aren't going to have any piston / valve clearance issues.

And as far as sources, check out http://www.car-part.com

Any year Toyota Prius will have the 1NZ-FXE you are looking for. And you can find 1NZ-FE engines in the xA, xB, Echo and Yaris. (In case you want to do the motor build while keeping your car on the road.) Both motors can be had used for as low as about $250/each.

 

prius uses atkinson cycle.....

but yeap most things above are true. unfortunately not too many prius motors lying around because if one gets wrecked they normally sell the entire trans , ecu , motor together. but the synergy drive is worth considerably more than the gas motor.

 

ok, thanks i will take this info and start reasearch off of this