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Re: Modifying a cast 383 intake?
[Re: torredcuda]
#1130062
12/08/11 06:52 PM
12/08/11 06:52 PM
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Joined: Jul 2008
Posts: 30,424
Florida STAYcation
dOc !
The village idiot's idiot
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The village idiot's idiot
Joined: Jul 2008
Posts: 30,424
Florida STAYcation
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Quote:
Let`s see -I said I wanted to LOOK STOCK and cannot AFFORD extrude hone!!! Please read and try to comprehend a post.
Well let's see ...if you can't afford EH ... then you can't afford any aftermarket service providers. And you can get many alum intakes that LOOK ENUFF STOCK ....
..ORE ...get a better paying job so you can afford EH .. 
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Re: Modifying a cast 383 intake?
[Re: dOc !]
#1130063
12/08/11 06:55 PM
12/08/11 06:55 PM
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Joined: Jan 2003
Posts: 1,030
NH
torredcuda
OP
super stock
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OP
super stock
Joined: Jan 2003
Posts: 1,030
NH
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I can modify the intake myself for the cost of a carbide and some sand paper drums or take it over to my buddy with a machine shop and have him do it for free.I plainly said I wanted to use the factory intake, I don`t know how to explain it any better???
Last edited by torredcuda; 12/08/11 06:56 PM.
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Re: Modifying a cast 383 intake?
[Re: torredcuda]
#1130064
12/08/11 07:00 PM
12/08/11 07:00 PM
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Joined: Jan 2008
Posts: 4,254
Canada
WO23Coronet
master
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master
Joined: Jan 2008
Posts: 4,254
Canada
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I think they did comprehend your post, they're just trying to save you some hard work and headaches, some of the older Edelbrock intakes look stock once they are painted and the script is ground off, also the M1 dual plane looks stock, I think it even has the firing order on it. None the less, you could cut the divider out of your cast intake to open up the plenum volume, and just your basic port and polish, round off any sharp turns and mildly increase the volume. It is said that the later cast iron intakes used on the 400's are a better intake so maybe you should start with that. They are a spreadbore design so you would have to make an adapter to fit the 4160 to it and open up the primary side so there is no interference with the primaries hitting the intake. That's what I had to do when I put a 4160 on a 360 spreadbore intake, I made an adapter out of 1" thick aluminum plate, and had to mill/grind out the primary side so the primaries wouldn't hit.
Maybe some of the FAST guys will chime in because they are the experts on making the cast intakes work, although I can't recall anyone using a single 4bbl on a Mopar BB in FAST, but I'm sure there are some.
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Re: Modifying a cast 383 intake?
[Re: torredcuda]
#1130066
12/08/11 07:05 PM
12/08/11 07:05 PM
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Joined: Jan 2003
Posts: 1,030
NH
torredcuda
OP
super stock
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OP
super stock
Joined: Jan 2003
Posts: 1,030
NH
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Re: Modifying a cast 383 intake?
[Re: SportF]
#1130070
12/09/11 11:09 AM
12/09/11 11:09 AM
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Joined: Nov 2003
Posts: 3,060
Western New York
sixpackbee
master
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master
Joined: Nov 2003
Posts: 3,060
Western New York
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I have to agree with Tom on this. I would do nothing more than a good inlet tract port matching. The engineers were pretty good at what they did back then. Most of the Chrysler intakes are quite efficient as is for a stock type application. Any meaningful modifications cost a small fortune.
Last edited by sixpackbee; 12/09/11 11:09 AM.
1959 Bugeye Sprite
1967 Charger Black L code
1967 Coronet R/T Convert Green 440 auto bought from original owner
1968 Charger R/T Bronze 440 4 spd console AM/FM
1969 Super Bee WM21H B5 A40 D21 N96
1969 Barracuda Formula S 340 Convert pilot car
1969 Hemi Road Runner RM23J D32 Omaha orange 4.10 Dana N96 N85
1970 Super Bee WM23N FE5 V1X 3.91 axle package, N96
1970 Road Runner RM21N B3 V1X D13
1971 MG Midget
1971 Road Runner RM23H GW3, A57
1972 Road Runner RM23P FY1, D21
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Re: Modifying a cast 383 intake?
[Re: scatpacktom]
#1130071
12/09/11 12:08 PM
12/09/11 12:08 PM
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Joined: Jun 2008
Posts: 3,914
usa
lewtot184
master
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master
Joined: Jun 2008
Posts: 3,914
usa
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Quote:
To be honest if it were me I would leave the intake and exhaust manifolds off the table and spend the effort somewhere more meaningful,like the cylinder heads. You have to understand that when you monkey with the divider wall you are messing with the bottom end and with a stock stroke 383 with 3.23 gears that would be the last thing I would look at. A big engine with alot of stroke can hack it and you need to kill the bottom end.
You are about to go down a path that is labor intensive and filthy dirty all for something you butt may or may not notice. I would look elsewhere
well said, good advice.
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Re: Modifying a cast 383 intake?
[Re: WO23Coronet]
#1130073
12/09/11 01:01 PM
12/09/11 01:01 PM
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Joined: Jan 2003
Posts: 74,937
U.S.S.A.
JohnRR
I Win
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I Win
Joined: Jan 2003
Posts: 74,937
U.S.S.A.
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Quote:
I think they did comprehend your post, they're just trying to save you some hard work and headaches, some of the older Edelbrock intakes look stock once they are painted and the script is ground off, also the M1 dual plane looks stock, I think it even has the firing order on it. None the less, you could cut the divider out of your cast intake to open up the plenum volume, and just your basic port and polish, round off any sharp turns and mildly increase the volume. It is said that the later cast iron intakes used on the 400's are a better intake so maybe you should start with that. They are a spreadbore design so you would have to make an adapter to fit the 4160 to it and open up the primary side so there is no interference with the primaries hitting the intake. That's what I had to do when I put a 4160 on a 360 spreadbore intake, I made an adapter out of 1" thick aluminum plate, and had to mill/grind out the primary side so the primaries wouldn't hit.
Maybe some of the FAST guys will chime in because they are the experts on making the cast intakes work, although I can't recall anyone using a single 4bbl on a Mopar BB in FAST, but I'm sure there are some.
NONE of the Edlebrock intakes look stock when painted, they are somewhat close but they don't have the choke stove mount and the coil is relocated so a holley wit ha dual feed line can be used. I have a DP4B which would be the best ebrock intake for the low deck.
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Re: Modifying a cast 383 intake?
[Re: torredcuda]
#1130074
12/09/11 01:38 PM
12/09/11 01:38 PM
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Joined: Oct 2011
Posts: 559
Idaho
LaRoy Engines
mopar
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mopar
Joined: Oct 2011
Posts: 559
Idaho
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A stock intake manifold can be used. But how much flow does it actually leave on the table?
I tested a 906 head flowing 321 cfm @ .700" lift. Here is what happened.
Test (1), ported 906 by itself
Test (2), ported 906, 1968-69 383 manifold 2806301, port matched and mildly plenum blended & 4401S AVS
Test (3), ported 906, box stock 383 Victor intake, 4401S AVS
Lift........(1)...........(2)...........(3)
.100........71............69............69
.200.......150...........131...........143
.300.......209...........172...........203
.400.......257...........187...........234
.500.......292...........199...........259
.600.......313...........203...........273
.700.......321...........204...........273
With a good intake manifold you can get the same flow at .300" lift as you can with a port matched and plenum blended stock manifold at .600" and .700" lift. Start changing carburetors and the flows increase even more.
Last edited by heyoldguy; 12/09/11 01:47 PM.
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