bluecab

I hope there is not a fundamental reason that I am missing that make this a silly question.

That said, I see many aftermarket FI systems that are quite expensive, some throttle body, some port injection.

Why can't we use a FI setup off of a more modern junkyard car, as long as the number of cylinders is the same and displacement is similar?

Clearly you would need a proper intake manifold and likely a way to alter the fuel map on the ECU.

I'm thinking late-model general motors 454 injection in an Olds 455. Seems to me that you could buy an entire running parts car/truck for less than the price of the aftermarket systems that Summit / Jegs etc. sell.

What am I missing? What are the stumbling blocks? Has anybody here done this?

young olds

Ive never done this but have considered trying it for some time. I dont know what problems you may run into but seems fairly straight forward, especially if you use tbi. if you do this post up your results. also I was looking for cars that were throttle body injection as well as still used a standard distributor to further ease the swap.

bluecab

I'd be much more inclined to look for a sequential port injection setup as the Throttle-body systems always seemed like a compromise; too much like an electric carb.
I have no plans to do this right away. Just asking for future reference when I have the car done and have time to experiment with it.

oldcutlass

Here is a discussion from a few years ago.


https://classicoldsmobile.com/forums...injection.html


And an install from someone else.


http://www.grimers.com/vehicles/olds/403efi/index.html

joe_padavano

The easiest way to do this is a TBI swap from a similarly-sized Chevy truck motor. The 305 PROM is close enough for a 307 Olds, the 350 works on an Olds 350, and the 454 works on a 455 Olds. Don't expect a performance boost from the stock TBI setup, however. You will get easier starting and probably a little better mileage. The Olds 307 CCC distributor works with the TBI system if you simply rewire the connector. If you have a modified engine, however, you will need to get into the PROM programming. Moates is a good source for software and programming tools, including a PROM emulator that lets you run the car off your laptop until you get the fuel and spark curves dialed in, at which point you can burn a PROM.