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
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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: 3,916 usa
lewtot184
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master
Joined: Jun 2008
Posts: 3,916
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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Re: Modifying a cast 383 intake?
[Re: ademon]
#1130079
12/09/11 06:42 PM
12/09/11 06:42 PM
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Joined: Jan 2003
Posts: 16,376
dogdays
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 16,376
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To the OP: You are out of line. 1. Brzezinski does not do Extrude Hone, they get inside the cast iron things and work on them because the racers they service are limited to cast iron. Some they cut holes in or cut them in half to allow access. I suggested them because they are experts in making stock cast iron stuff work and because the times I have called them to ask a question about something they have been helpful and courteous. 2. Check my post, I did not use the words "Extrude Hone". 3. In your original post you said you wanted it "to look stock". You did not say you HAD to use the cast iron intake. I did read your post more than once.
Enough time wasted, R.
Last edited by dogdays; 12/09/11 06:43 PM.
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Re: Modifying a cast 383 intake?
[Re: torredcuda]
#1130081
12/09/11 10:10 PM
12/09/11 10:10 PM
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Joined: Feb 2005
Posts: 4,310 Prospect, PA
BSB67
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master
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Prospect, PA
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It is not necessarily clear to us what you may or may not be flexible on. Like John said, the DP4B is not stock, but similar in that it is a relatively low rise dual plane manifold. My experiance is, other than some Mopar guys, nobody else will know the difference and it is a nice step up from stock IMO. There are little things that you can do to add power and performance in a stock package during a rebuild. Maximize the CR for the gas that you have, get the right cam, and put on the best prepared heads you can afford. If there is a larger carb that is acceptable to you, do that too.
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Re: Modifying a cast 383 intake?
[Re: BSB67]
#1130082
12/09/11 10:46 PM
12/09/11 10:46 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
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NH
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I am not biulding the car for any specific class so I really have no rules to conform to but- "To look stock I plan on running(OK change this to WILL RUN) the stock intake and exhaust manifolds and factory equipped Holley 4160 carb."I don`t think the CH4B has a choke well so that kills the stock look?I am just trying to maximize the performnace of the stock components.
Last edited by torredcuda; 12/09/11 10:47 PM.
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