Re: Iron 4bbl intake mods or just slap it on?
[Re: 68_661charger]
#942464
03/04/11 09:54 AM
03/04/11 09:54 AM
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Joined: Jan 2003
Posts: 8,941
Holly/MI
Dean_Kuzluzski
master
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master
Joined: Jan 2003
Posts: 8,941
Holly/MI
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To answer your question.......... the factory intakes weren't terrible. It's your time/labor, have at it. Smoothing out the intake passages won't hurt but the gains may not be noticable to the seat-of-the-pants dyno. As mentioned the CH4B, or the Weiand Dual-plane (8009?) would drop some weight and gain a few hp. Personally, I'd grind any distinguishing marks off the the aluminum intake you have and paint it to match. My aluminum waterpump will get the same treatment. I like a stealth look, it surprises people more when they see how it runs. 
R.I.P.- Gary "Coop" Davis 02/09/68-05/13/04
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Re: Iron 4bbl intake mods or just slap it on?
[Re: Dean_Kuzluzski]
#942465
03/04/11 10:29 AM
03/04/11 10:29 AM
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Joined: Jan 2003
Posts: 24,562
Brookeville, Md
Mr.Yuck
Not enough dumb comments...yet
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Not enough dumb comments...yet
Joined: Jan 2003
Posts: 24,562
Brookeville, Md
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Quote:
To answer your question..........
the factory intakes weren't terrible. It's your time/labor, have at it. Smoothing out the intake passages won't hurt but the gains may not be noticable to the seat-of-the-pants dyno.
As mentioned the CH4B, or the Weiand Dual-plane (8009?) would drop some weight and gain a few hp.
Personally, I'd grind any distinguishing marks off the the aluminum intake you have and paint it to match. My aluminum waterpump will get the same treatment. I like a stealth look, it surprises people more when they see how it runs.
I paint everything...lol even my new motor w/ Stage VI heads.
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Re: Iron 4bbl intake mods or just slap it on?
[Re: 68_661charger]
#942466
03/04/11 10:33 AM
03/04/11 10:33 AM
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Joined: Jan 2003
Posts: 75,082
U.S.S.A.
JohnRR
I Win
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I Win
Joined: Jan 2003
Posts: 75,082
U.S.S.A.
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Quote:
I'm wanting to take my M-1 dual plane off and put the factory iron intake on for looks. It's a street car mild 440 and cam with ported 906 heads. Does the iron intake flow any worse? Should I smooth it? Just put it on?
What year is your car and which M1 dual plane do you have , the original one that is just a copy of the stock iron intake or the latest which is actually a rebadged RPM ?
The can be issues when switching to a CH4B , coil placement , hood clearnace depending on your air cleaner setup and the car you have.
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Re: Iron 4bbl intake mods or just slap it on?
[Re: JohnRR]
#942467
03/04/11 11:09 AM
03/04/11 11:09 AM
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Joined: Jan 2003
Posts: 24,562
Brookeville, Md
Mr.Yuck
Not enough dumb comments...yet
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Not enough dumb comments...yet
Joined: Jan 2003
Posts: 24,562
Brookeville, Md
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Quote:
Quote:
I'm wanting to take my M-1 dual plane off and put the factory iron intake on for looks. It's a street car mild 440 and cam with ported 906 heads. Does the iron intake flow any worse? Should I smooth it? Just put it on?
What year is your car and which M1 dual plane do you have , the original one that is just a copy of the stock iron intake or the latest which is actually a rebadged RPM ?
The can be issues when switching to a CH4B , coil placement , hood clearnace depending on your air cleaner setup and the car you have.
CH4B fits w/o any issues including coil mount.
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Re: Iron 4bbl intake mods or just slap it on?
[Re: Mr.Yuck]
#942468
03/04/11 01:08 PM
03/04/11 01:08 PM
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Joined: Jan 2003
Posts: 75,082
U.S.S.A.
JohnRR
I Win
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I Win
Joined: Jan 2003
Posts: 75,082
U.S.S.A.
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Quote:
Quote:
Quote:
I'm wanting to take my M-1 dual plane off and put the factory iron intake on for looks. It's a street car mild 440 and cam with ported 906 heads. Does the iron intake flow any worse? Should I smooth it? Just put it on?
What year is your car and which M1 dual plane do you have , the original one that is just a copy of the stock iron intake or the latest which is actually a rebadged RPM ?
The can be issues when switching to a CH4B , coil placement , hood clearnace depending on your air cleaner setup and the car you have.
CH4B fits w/o any issues including coil mount.
Not true, CH4B is taller than the iron intake and depending on the air cleaner in use it will hit the hood. I used to say the same as you , no problem, member NASBackyard took that advise and put one on the 440 in his 69 RR with air grabber hood and when he closed the hood the air cleaner dented the hood. Coil mount is fine if you have a Holley but you need to extend the coil wire because it mounts on the opposite side of the intake .
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Re: Iron 4bbl intake mods or just slap it on?
[Re: 68_661charger]
#942469
03/04/11 01:31 PM
03/04/11 01:31 PM
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Anonymous
Unregistered
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Anonymous
Unregistered
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Cast iron doesn't flow any worse than an aftermarket dual plane M1! I've run and am running a square bore cast iron one on my '63 Dodge 330.   Last car in steet trim ran easy, tractionless 13.5's @ 104 mph with 3.23 gears and the "junk" cast iron intake. 
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Re: Iron 4bbl intake mods or just slap it on?
#942470
03/04/11 02:35 PM
03/04/11 02:35 PM
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Joined: Jul 2003
Posts: 4,787
Holland MI Ottawa
2boltmain
master
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master
Joined: Jul 2003
Posts: 4,787
Holland MI Ottawa
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The M1 dual plane was supposed to be an improved version of the oem iron unit. On top of that when it came out in the early 90s (Performer RPM did not exist then) mopar claimed there M1 dual plane made like 7 more HP then "Other aftermarket dual plane manifolds". The M1 dual plane should be similar all around to an iron unit but if you want iron the factory intakes were up to snuff.
Keep old mopars alive.
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Re: Iron 4bbl intake mods or just slap it on?
[Re: JohnRR]
#942471
03/04/11 02:35 PM
03/04/11 02:35 PM
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Joined: Jan 2003
Posts: 24,562
Brookeville, Md
Mr.Yuck
Not enough dumb comments...yet
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Not enough dumb comments...yet
Joined: Jan 2003
Posts: 24,562
Brookeville, Md
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Quote:
Quote:
Quote:
Quote:
I'm wanting to take my M-1 dual plane off and put the factory iron intake on for looks. It's a street car mild 440 and cam with ported 906 heads. Does the iron intake flow any worse? Should I smooth it? Just put it on?
What year is your car and which M1 dual plane do you have , the original one that is just a copy of the stock iron intake or the latest which is actually a rebadged RPM ?
The can be issues when switching to a CH4B , coil placement , hood clearnace depending on your air cleaner setup and the car you have.
CH4B fits w/o any issues including coil mount.
Not true, CH4B is taller than the iron intake and depending on the air cleaner in use it will hit the hood. I used to say the same as you , no problem, member NASBackyard took that advise and put one on the 440 in his 69 RR with air grabber hood and when he closed the hood the air cleaner dented the hood. Coil mount is fine if you have a Holley but you need to extend the coil wire because it mounts on the opposite side of the intake .
what was he running a 1" spacer? I know it's a tad taller but I've used them on all sorts of 440 b-body cars and have yet to run into a problem. I even ran a 1/2" spacer and larger air cleaner on my 67 GTX w/ no issues. Never heard of one coming close to the hood.
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Re: Iron 4bbl intake mods or just slap it on?
[Re: Mr.Yuck]
#942472
03/04/11 06:57 PM
03/04/11 06:57 PM
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Joined: Jan 2003
Posts: 75,082
U.S.S.A.
JohnRR
I Win
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I Win
Joined: Jan 2003
Posts: 75,082
U.S.S.A.
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Quote:
Quote:
Quote:
Quote:
Quote:
I'm wanting to take my M-1 dual plane off and put the factory iron intake on for looks. It's a street car mild 440 and cam with ported 906 heads. Does the iron intake flow any worse? Should I smooth it? Just put it on?
What year is your car and which M1 dual plane do you have , the original one that is just a copy of the stock iron intake or the latest which is actually a rebadged RPM ?
The can be issues when switching to a CH4B , coil placement , hood clearnace depending on your air cleaner setup and the car you have.
CH4B fits w/o any issues including coil mount.
Not true, CH4B is taller than the iron intake and depending on the air cleaner in use it will hit the hood. I used to say the same as you , no problem, member NASBackyard took that advise and put one on the 440 in his 69 RR with air grabber hood and when he closed the hood the air cleaner dented the hood. Coil mount is fine if you have a Holley but you need to extend the coil wire because it mounts on the opposite side of the intake .
what was he running a 1" spacer? I know it's a tad taller but I've used them on all sorts of 440 b-body cars and have yet to run into a problem. I even ran a 1/2" spacer and larger air cleaner on my 67 GTX w/ no issues. Never heard of one coming close to the hood.
No spacer , explain what your LARGER AIR CLEANER was please ?
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Re: Iron 4bbl intake mods or just slap it on?
[Re: Mr.Yuck]
#942477
03/05/11 09:08 AM
03/05/11 09:08 AM
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Joined: Jan 2003
Posts: 75,082
U.S.S.A.
JohnRR
I Win
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I Win
Joined: Jan 2003
Posts: 75,082
U.S.S.A.
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Quote:
No spacer , explain what your LARGER AIR CLEANER was please ?poor wording TALLER is what I should have said.
With a DROP base I assume ? apples to oranges ...
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Re: Iron 4bbl intake mods or just slap it on?
[Re: 68_661charger]
#942478
03/05/11 09:10 AM
03/05/11 09:10 AM
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Joined: Jan 2003
Posts: 75,082
U.S.S.A.
JohnRR
I Win
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I Win
Joined: Jan 2003
Posts: 75,082
U.S.S.A.
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Quote:
I've had it on the car for about 7-8 yrs so its probably the old M1. It does have a spot for the coil to sit and looks like the iron one. I guess I was just wondering if I'd get the same performance if I used the original stuff.
You won't see much of any change in either diredtion , again , what year car are you working with ?
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Re: Iron 4bbl intake mods or just slap it on?
[Re: JohnRR]
#942479
03/05/11 01:29 PM
03/05/11 01:29 PM
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Joined: Sep 2004
Posts: 6,906
IL, Aurora
ademon
master
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master
Joined: Sep 2004
Posts: 6,906
IL, Aurora
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you can mill out the divider for more high rpm power so the carb can pull from all four barrels, also gasket match the first few inches of the runners, if you have the time and you can use a long grinder to round the turns deep into the manifold. I have a LOT of time in this intake for a 71 340 and it MAY yield 5hp up top.
Last edited by ademon; 03/05/11 01:30 PM.
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