Rav4 3sfe to 5sfe engine swap Options

[ricochet1490]

So, I bought my first Rav4 about a month or 2 ago. I've been in the celica world for a long time and I wanted a winter beater. As it turns out, the 3s decided that it was going to start Rod knocking like a beast. Needless to say, car needed work.

I had an old 5s just sitting on a pallet in the garage collecting dust. it came from a 94 celica, and it ran when it was pulled.

Now that I've got everything out of the Rav, and from what i'm told, the 5s block will need ground on the back to make space for the transfer case, but otherwise it should be pretty straight forward I think.

I haven't had time to research everything... but to be honest there isn't much out there on this particular swap because there aren't that many gains to be had. For me the gains are purely $$$.

if you guys see anything glaring, PM me and let me know if you would....

The Plan
1) swap wiring harness from 3sfe to 5sfe
2) "depending on how the ecu works out", swap over exhaust manifold because of OBD1/OBD2 differences in the model years
3) hook tranny and T-case to 5sfe ( grind block as needed, additionally brace as needed for missing mounting points)
4) repair subframe rust, mount engine and tranny to subframe - reinstall in car
5)hook everything back up including 3sfe ecu to run engine. ** Pray ecu can deal with extra stroke/air and change fuel delivery to accomodate**
6) ** pray that i don't need to swap injectors to do this to get engine to running** - Does anyone know if there is much in the way of difference between the injectors? basically I'm looking to run the 5sfe like a stroked 3sfe. Should work I'd think.

[ricochet1490]

well, you just gave me something to look up. the 3s ecu is trying to fire it sequentially, 11,12,24,25, 1 pin for each injector. The 5s ecu was firing in batch, all 4 fired off of 12 and all 4 fired off of 25.

this probably is coming down now to a fuel quantity issue based on the quantity of pulses.

This is going to take some thought i think. if the injector volumes are different, then simply just splicing each injector into each output isn't the answer. I wonder if I could piggy back the 5s ecu to handle the fueling, ignition etc, and the 3s ecu to handle the rest of the car functions like tranny, gauges etc.