yep, the 413 again. its going in a 91 ram pickup, which came tbi on a 360. i built an adaptor in hopes that i wouldn't have to change anything electrically. is there any reason it wouldn't work? i've also used my original 360 alternator (with adaptor) and i got a 2 wire bb dist. i think i'm ready.

might be confused, but it sounds like you bolted the 360 tbi onto a 413?

The older tbi's don't like a whole lot of change.
so those extra 60 ci, might be a problem.

Plus your distributer goes the other way, but I guess if the signal is good it doesn't matter.

how do you mean? the change in vacuum, or the change in fuel delivery? the injectors vary in delivery rate, so.....

will it run? probably. Not sure how it's going to handle the extra cubic inches. They can only flow what they can flow. What has been done to the 413? I'd imagine if you have done any work, such as head work, performance cam, headers and so on that the 360 TBI will not be enough. A Decent 4bbl would be a better way to go. Anybody know what those 360 TBI's flow?

cleanup only. its only got 47,xxx out of a motor home, its pretty heavy duty

I guess it will work if it flows enough. I'll say you're going to need around the equalalent of a 625cfm carb to make it doable.

Trying to get your next smog check should be interesting.

no smog needed. its oregon registered

Oh, ok...saw your location and the year of the truck and assumed that would be a bigger hurdle than trying to get it running correctly with the mismatched throttle body to engine size.

By the way, since you are changing it all around anyways, why not try to find a larger throttle body? Not sure if the injector electronics would run properly or not off hand, but a throttle body from a TBI 454 powered Chevy might be an option. Plenty of them around too (even in the junk yards) to try something. They used them all the way up until 1994.

Will the distributor work at all? The tbi small blocks would have used a different distributor. Did the tbi small blocks still use an old-school magnetic pickup or were they a hall pickup? If it was a magnetic pickup, a distributor from a lean burn/electronic spark control car might work. A distributor with a mechanical advance definitely would not work. The computer uses the spark timing to control the injector timing so if you don't have a distributor that's working correctly, you won't get fuel or spark.

I will say it's going to want to run lean all the time. During warm-up, accel and full-throttle when the computer goes into open loop(oxygen sensor ignored) the computer will default to it's programming for 360 fueling. At cruise, the o2 sensor *may* be able to cover or partially cover the extra cubes. I'm going to bet IF it runs, it will not run well. If driveability is what you want, a well-tuned thermoquad is actually quite good.

Either way, good luck. I hope I'm wrong and it runs well for you.

thanks for the input. as for the dist, i used the original small block 360 dist (hear me out) for the 413. it was about 5/16" too short, so i cut it off at the shaft and extended it to the proper length. i think it'll work fine, but i haven't tested it yet. it fits the motor perfectly. i guess we'll see.

i know the electronic crap works on the tbi that i have, plus i hate re-wiring [Edited by Moparts - Family Friendly Site - Keep it clean]. i want this swap to be easy. everything from the 360 is going in the 413. i.e: power steering, smog pump, throttle body, O2 censor, and all the plug-ins. i want the brain to work normally. the only thing i'm worried about is the vacuum change and the fuel change.

Ok I see. What you did with the distributor should work. The ECU doesn't know or need to know which way the distributor is turning. The biggest issue left is I think it will run lean. If you can get an adjustable fuel pressure regulator and bring fuel pressure up you will increase fuel delivery across the board.

I have had the same thought.
I believe it will work just fine. The dist is a Hall Effect and the rotation isnt going to make a difference.
My research said that the 360 TBI unit flows 660 CFM, it does have large throttle bores.
It may need a size or 2 larger injectors but a good injector shop shoud be able to help.

still using the original electric in tank pump. i used it before with an ol holley 2bbl last year and the pump kept up just fine. the injectors come in different flow sizes determined by their color,i.e: blue, green, yellow, pink and brown. the blur are, i think, the highest flow. i like the tbi because its easy to maintain and i cant tweak carbs for the life of me.

I'm also putting together an EFI big block, a 440. It is a Holley Commander TBI 900 cfm set up. These can be had pretty cheap used on EBAY, I've seen complete used setups for $400, new they were $1600. Maybe worth a look? I like that the 4bbl throttle body is about 1 1/2 inch shorter that the stock carb so I can fit an Eddy RPM intake!

CAC

what did that originally come on? what year?