How Do Ford 429 Engine Valve Covers and Heads Compare to Cobra Jet Models?

[Fahlin Racing]

You would have to look for testing done on what you are asking about. You are talkng about 3 different head designs. Second you are involving 3 different engine families.

Basic 429-460s utilize a polysperical design, 335 series 351C etc are polysperical. You can call this canted if you like for either. The 427 SOHC is a full hemi head, the 429 Boss is a polysperical design but the valves are rotated as well.

I would look into engine literature if you want to know the fine details.

 

[average guy]

fahlin
429/460 are 2.19 intake and Cobra Jet/Super Cobra Jet are 2.25 intake.
ports are equally big on both.
6 grand plus more for .06" bigger intake valve? no thanks.
429/460 gets my vote.
when you said you might try Mopar 440.
a word to the wise.
i'm a refugee from Mopardom.
Resto guys have driven up prices for everything.
also.
429/460 has later year run.
increases chances of finding complete engines and
parts in nicey nice condition.

Have A Nice Day!

 

[Fahlin Racing]

There is more to the picture than just the valve size bud. And 6000 or whatever it was for some heads, I believe that was about the Boss heads, correct? that's a whole different ball game.

Standard 429 or 460 heads will be much less hands down completely rebuilt. I live by a few scrapyards, one which has a 440 in an RV that I know of. I don't think its moving too fast either.

Just remember, HUGE ports DO NOT mean anything unless you have the right velocities, no flow separation etc (correct application). Many variables! The advertisements all promote CFM, which leads to misunderstanding of how you are filling the cylinders in reality.

Enjoy your findings.

 

[average guy]

fahlin
about the 440, jump on it!

regarding 460 and i
'i thought and i bought'
of all things that might have been Ford slogan.
it's 460 for me. case closed.

all that stuff about flow rates, I'm not interested
in cutting things that fine.

if 460 doesn't make power I'm covered.
i'll just say:
'well that fahlin guy said get one.'

Have A Nice Day!

 

[xxChrisxx]

all that stuff about flow rates, I'm not interested
in cutting things that fine.

So you aren't interested in what makes it work properly?

Which is exactly what you did in the transmission thread.

if 460 doesn't make power I'm covered.
i'll just say:
'well that fahlin guy said get one.'
Have A Nice Day!

This is an engineering forum, perhaps it would be a good idea to apply at least some thought to making it work.

At this rate it sounds like you'll have a mismatched head and block, making no power. Attached to a transmission with the gears removed, fixed in too high a ratio to be useful.

 

[average guy]

chris
ok.i thought i put in here that
i found out somewhere else this:

429/460 heads intake valve size is close
to Cobra Jet valve size.

both intake & exhaust ports on 429/460 are big although there was something about
working on exhaust ports.

it may not be tons of info but it is something.

regarding trans i don't think it's a real big deal.

you're acting like I'm taking corn that could be
used to feed starving people around the world
to make bio diesel. ( that's one of my pet peeves. )

Have A Nice Day!