400 2v+4v heads
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400 2v+4v heads
Alright so i have a question, i currently have a 400 2v, and i was looking to but 4v heads on it, But first me and my friend have been arguing over what the V stands for..from what i understand it is Barrels ,but he says valves if someone could clear that up that would be great. But anyways what would i have to do to get the 4v heads to work correctly on a 2v motor?
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Joined: Nov 2007
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I always understood it to denote the barrel carb on the intake - but that certainly may be wrong. It absolutely does NOT stand for valves - there was never a 4 valve arrangement from Ford for their pushrod engines.
To get the 4V on your engine, you need to locate a 4V intake manifold, as the intake ports on the 4V heads are MUCH larger than the 2V. You will also need to make provisions for the exhaust (for the same reason).
Unless you've got a particular build in mind, you can probably find some great recipes for a 400 here that DON'T involve the 4V heads.
To get the 4V on your engine, you need to locate a 4V intake manifold, as the intake ports on the 4V heads are MUCH larger than the 2V. You will also need to make provisions for the exhaust (for the same reason).
Unless you've got a particular build in mind, you can probably find some great recipes for a 400 here that DON'T involve the 4V heads.
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well i already have a edlebrock intake, and sanderson headers that are meant for a 4v cleveland already , so u think it owuld be better to buy a pair of heads then send a pair of the 4v to the shop?
Laughing Gas
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From: New-brunswick,Canada
I know the valve on the 4v head are a little bit bigger 2.198-inch intake valves and 1.715-inch exhausts with small chamber.4v head are good to produce torque on the high end. 2v good for low-end torque, 2.050-inch intake and 1.659-inch exhaust with open chamber. Australian head is a mix between the 2:small port with close chamber. Hope this can help.
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i see..im havingtrouble deciding what heads i should go with but thank you for your help, would you guys say aussie would be one of the betters heads for a build
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Lead Driver
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[QUOTE=OldBlue68]i see..im havingtrouble deciding what heads i should go with but thank you for your help, would you guys say aussie would be one of the betters heads for a build[/QUOTE
Yes thats right & you should get a set of TMI's 0 deck pistons to go with them.
Yes thats right & you should get a set of TMI's 0 deck pistons to go with them.
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From: western montana
what cam hollenjoe? like 230,240 range @050?...mechanic roller? I have a set of 4v closed chamber heads... picked em up a few weeks ago...thinking of putting them on everything but dang they won't reproduce. Have 72 cj with open chamber...was considering using them on that car if i keep it when I'm done fixn it up... a big cam and 11:1 cr is mandatory imo to get the high end force these are capable of.
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From: Delaware
Don't forget that you also need spacer plates to use 4V heads on a tall deck 351M/400 block. You still need the 351C-4V intake manifold. The Sanderson headers should work on the 4V heads, but you need adapters for those on 2V heads.
You need a high lift cam to get the maximum flow from 4V heads.
What do you expect from this motor? Lots of power at low RPM, or good power at highway speed, or high RPM power.
You need a high lift cam to get the maximum flow from 4V heads.
What do you expect from this motor? Lots of power at low RPM, or good power at highway speed, or high RPM power.
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Originally Posted by roger dowty
what cam hollenjoe? like 230,240 range @050?...mechanic roller? I have a set of 4v closed chamber heads... picked em up a few weeks ago...thinking of putting them on everything but dang they won't reproduce. Have 72 cj with open chamber...was considering using them on that car if i keep it when I'm done fixn it up... a big cam and 11:1 cr is mandatory imo to get the high end force these are capable of.
torque : 392@2000
max torque : 485@4500
Hp : 496@6000
Not bad.... It estimated a dcr of 8.2:1 wich will need 91 and maybeeee 93 octane
All with a 750cfm carb
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Originally Posted by mustang81
I know the valve on the 4v head are a little bit bigger 2.198-inch intake valves and 1.715-inch exhausts with small chamber.4v head are good to produce torque on the high end. 2v good for low-end torque, 2.050-inch intake and 1.659-inch exhaust with open chamber. Australian head is a mix between the 2:small port with close chamber. Hope this can help.
