1NZ-FE cams in a 1NZ-XFE plus larger injectors and E85

I am a huge fan of ethanol, and I use it in 3 of my other high performance turbo cars.

The problem with ethanol and conventional gas motors is the compression is too low to take advantage of the fuel resulting in poor fuel economy.

WHAT IF... you were to take the cams from the "Otto" 1NZ-FE motor and drop them into the Prius "Atkinson" with the higher compression.

I you are looking to maximize MPG from a prius, this would definintly not help, but would allow you to run a more ECO friendly vehicle, but still maintain a better than average MPG as compared to other vehicles.

Main question is, is it even possible, are the cams a direct swap?

Also can use injectors that are about 25% larger, then use a fuel management tool like an Apexi AFC to adjust the trims and the O2 sensors will do the rest.

A high compression 13:1 prius running E85 would be a great combo, not to mention that E85 is generally a little cheaper than pump gas.

 

Most motors are not designed to run E85, therefore not a really great alternative fuel if you still want good fuel economy. Much of the energy from E85 is wasted, and if used probably would match if not exceed the same MPG as pump gas.

This is where the cams come in. By running standard cams, and not the ultra long duration intake cam that the prius uses, you will increase actual compression to the 13:1 that the motor actually is. Will you get 55MPG? Probably not, because you just got rid of one of the main reasons why the Prius does get that. Could you get 45MPG? I would think you could, but with an added bonus. A 13:1 compression 1.5L motor running on E85 would probably be putting out over 150hp, making the combined output of over 200hp from the Prius, but still maintain 40-45MPG, AND eco friendly!!!!

You don't mess with the timing, leave it alone, that would require re-flashing the ECU, which I don't know if that part of the ecu is re-flashable, or standalone...not going to work with the hybrid stuff very well but could be done as a standalone piggy back type system.(factory ECU thinks that it is controlling engine, but it only recieves signals and you use dummy loads for injectors and coils)

I ran over 900rwhp(1100bhp) on my 3.0 lexus on E70, at 30 pounds of boost and 28 degrees timing, I could not get it to detonate. The fuel is just amazing, but 10:1 compression just cannot take advantage of it. I have another lexus with a supercharger that only runs 7 psi of SUPER HOT AIR, non-intercooled(broken recirc pump). On 100 degree day, I ran that up to 8,000RPM and 34 degrees of timing on a 10:1 motor, and I still could not get to detonate.

 

Not possible? Atkinson vs Otto prove that it is possible.

Sure volume wise it has less energy than gasoline, but now lets talk about wasted energy.

 

Here is an interesting article I came across awhile ago, about alcohol fuels and MPG.

www.methanol.org/pdf/ISAF-XV-EPA.pdf

 

only an 84mm stroke, they can turn quick, although I am still learning about what the offset crank is all about. The cams and ECU is what limits the RPM's. At an 84mm bore and forged rods, 9,000rpm would be rather easy to do. But, I wouldn't be doing this for power as the main goal. Main goal is to be more eco friendly, while getting a decent power boost, and maintaining great MPG.

Yeah, 2J motor in the lexus. Old school GS300. Had a MKIV, but sold it to work on the GS. I like sleepers.


As for a question earlier about the SAFC, yes can easily work with the ecu. 25% larger injectors for E85 and the SAFC, just to fine tune it.

 

Not sure on the compression, I haven't looked any further into the off-set crank think. My guess it is a combo of head/piston.

I wouldn't go megasquirt, there are other systems out there that don't cost too much more that can do a whole lot more. The money saved is not worth the time that you will spend building, and troublshooting hardware.

I would go AEM stand alone and piggy back that onto the factory ECU to retain your hybrid function, and OBDII compliency.

You can get a honda AEM for as cheap as $600, and sometimes even less, just don't ask where they got it from...haha.