I have just acquired an EFI 429 plenum off an industrial 429. It looks almost identical to the EFI 460 plenum. The only difference I can see is that the 429 plenum is wide open until the very bottom where it has a very thin rib (5/8 inch tall) to match the intake as where the 460 plenum is divided in half from top to bottom down the where it meets the intake. Has anybody on here ever swapped the 429 plenum to the 460 ? I am just curious what the outcome might have been. Thanks.

Rich

 

Does this 429 use 460 EFI style heads, or does it use carb-style heads?

 

This is an excellent question. Think of the possibilities if they use carb style heads

 

My best guess is the industrial engine is designed to run a constant rpm and would be less suited for the street than the 460. However, I would also surmise it to have a lower rpm torque curve if it has smaller runners.

 

I will have to get the casting numbers off of the head but I am almost positive they are the same EFI type heads the EFI 460s have.

 

Pictures please.

Some side-by-sides would be nice.

Would love to read/see some info on an industrial spec 385 series stuff regardless.

 

 

As you can see in the photos, the 429 plenum is a fresh take off and has not been cleaned up yet. If you notice in one of the pics the 429 plenum even says 7.0L on the passenger side.
You might also notice on the 460 plenum I at one time was working on putting a "knife edge" on the bottom on the plenum. I have a custom 3 inch plenum spacer on my truck which has no bar in the middle. I also have another intake manifold that I cut the rib out at an attempt to make a single plane intake.

 

Well, I was picturing the intake itself. I forgot the "S" plenum the 460s have connecting the throttle body to intake. I don't know how much of an affect that will have, but I would assume the effect would be similar to an open carb spacer. Allowing both sides of the throttle body to feed the entire engine.

 

I would guess the 429 plentum makes more torque

 

Put it on and see what happens. The rest of us at FTE await your report.

 

The hell is a industrial 429? And here I thought the 429 died in the 70s sometime

 

Ford put the 429 in their medium duty trucks in the 80s and 90s. Called it the 7.0 liter. Carbed and EFI applications. It was part of the 385 engine series along with the 460 and 370. I think it died out sometime in the 90s.

 

Interesting. Learn something new everyday I guess

 

yup they were the ONLY gas engine from 88+ available. 460 was never offered on anything larger than a F-superduty