Questions about 4bbl
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Senior User
Joined: Apr 2006
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From: Savannah, GA
Questions about 4bbl
In a little les than a month I'll have the money to do my 4bbl/offy intake mod. At this moment I'm planning on using a 500cfm Edelbrock performer carb, how hard are these to tune/or is there another carb you would reccomend that is simple to tune?
What all do I need besides the carb and intake manifold to do this swap?
What do I need to hook up the throttle linkage?
Is there anything I can do to keep the kickdown?
When I get the nerve to do it I'll also be putting a cam in it, my father used to be a mechanic so I shouldn't have to many problems. I plan on using the Crane truck power cam, anything specific I need to know before getting into this.
My last thing is what kind of an ignition system would be ideal for this setup?
Any other input is greatly appreciated.
What all do I need besides the carb and intake manifold to do this swap?
What do I need to hook up the throttle linkage?
Is there anything I can do to keep the kickdown?
When I get the nerve to do it I'll also be putting a cam in it, my father used to be a mechanic so I shouldn't have to many problems. I plan on using the Crane truck power cam, anything specific I need to know before getting into this.
My last thing is what kind of an ignition system would be ideal for this setup?
Any other input is greatly appreciated.
Postmaster
Joined: Dec 2006
Posts: 3,603
Likes: 10
From: Spokane, WA
That carb has plenty of parts for tuning available including different kick-down linkage parts. Check the Edelbrock web site for details and don't be afraid to Email or call their Tech Dept with questions.
I used a 4' Lokar cable and a Spectre bracket but usually the stock bracket can be modified or a new one built from scratch will work.
Check out gofastforless.com for inexpensive ignition upgrades such as using an HEI box with a DSII dizzy and a TFI coil...all junk yard available stuff.
I used a 4' Lokar cable and a Spectre bracket but usually the stock bracket can be modified or a new one built from scratch will work.
Check out gofastforless.com for inexpensive ignition upgrades such as using an HEI box with a DSII dizzy and a TFI coil...all junk yard available stuff.
Thread Starter
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Senior User
Joined: Apr 2006
Posts: 339
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From: Savannah, GA
Originally Posted by Harte3
That carb has plenty of parts for tuning available including different kick-down linkage parts. Check the Edelbrock web site for details and don't be afraid to Email or call their Tech Dept with questions.
I used a 4' Lokar cable and a Spectre bracket but usually the stock bracket can be modified or a new one built from scratch will work.
Check out gofastforless.com for inexpensive ignition upgrades such as using an HEI box with a DSII dizzy and a TFI coil...all junk yard available stuff.
I used a 4' Lokar cable and a Spectre bracket but usually the stock bracket can be modified or a new one built from scratch will work.
Check out gofastforless.com for inexpensive ignition upgrades such as using an HEI box with a DSII dizzy and a TFI coil...all junk yard available stuff.
Cargo Master
Joined: Feb 2003
Posts: 2,341
Likes: 5
From: Sacramento
I use the setup you're going to run. I used all-thread & 2 rod ends for the throttle linkage. It was fairly easy, except the hedder, which needed a frame notch to get in. Dont get Hedman! The carb was close to being in tune, I was playing around with it & seems like the main jetting is ok, but the power stage needed help. I used a little stiffer step-up spring than stock. As for ignition, I used to have points & it would fire up with the flick of the starter. Now I have a Duraspark dist. with a Summit brand multi-spark amplifier bo
$120). You can also find used MSD6A boxes on Craigslist for fairly cheap. I figure, if I'm going thru all the trouble to re-wire to electronic ign, I may as well have something with some oomph.
$120). You can also find used MSD6A boxes on Craigslist for fairly cheap. I figure, if I'm going thru all the trouble to re-wire to electronic ign, I may as well have something with some oomph.
Postmaster
Joined: Dec 2006
Posts: 3,603
Likes: 10
From: Spokane, WA
TFI is the ignition system used by Ford from about the early to mid 80's up in to the 90's sometime.
Exhaust manifolds from an EFI engine are a good cheap upgrade.
Exhaust manifolds from an EFI engine are a good cheap upgrade.
Last edited by Harte3; Jul 24, 2007 at 10:42 AM.
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Originally Posted by N7ghtwolf
In a little les than a month I'll have the money to do my 4bbl/offy intake mod. At this moment I'm planning on using a 500cfm Edelbrock performer carb, how hard are these to tune/or is there another carb you would reccomend that is simple to tune?
What all do I need besides the carb and intake manifold to do this swap?
What do I need to hook up the throttle linkage?
Is there anything I can do to keep the kickdown?
When I get the nerve to do it I'll also be putting a cam in it, my father used to be a mechanic so I shouldn't have to many problems. I plan on using the Crane truck power cam, anything specific I need to know before getting into this.
My last thing is what kind of an ignition system would be ideal for this setup?
Any other input is greatly appreciated.
What all do I need besides the carb and intake manifold to do this swap?
What do I need to hook up the throttle linkage?
Is there anything I can do to keep the kickdown?
When I get the nerve to do it I'll also be putting a cam in it, my father used to be a mechanic so I shouldn't have to many problems. I plan on using the Crane truck power cam, anything specific I need to know before getting into this.
My last thing is what kind of an ignition system would be ideal for this setup?
Any other input is greatly appreciated.
http://www.performancedistributors.c...istributor.htm</O
>Also, there is now an excellent installation article on the D.U.I. Distributor on the Ford-Trucks.com site at:
https://www.ford-trucks.com/article/idx/0/358/article/DUI_Ignition_Installation_In_A_Ford_351W_V8.html
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Thread Starter
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Senior User
Joined: Apr 2006
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From: Savannah, GA
I've decided to ditch the Edelbrock and go with a Holley 1850 600cfm, my father likes Holley's more than Edelbrocks and says Edelbrocks are just as hard to tune as I've heard. Should I go with the Offy C or DP?
What are carb spacer for and is there any reason I should go for one?
Whats that connector thing on the egr valve called that the pcv and vaccum lines hook too? And what do I need to connect the pcv to my new setup?
Other than these questions I think I'm pretty set, I've got the throttle cable/bracket picked out, the choke cable (I'm going with a manual choke), air cleaner.
What are carb spacer for and is there any reason I should go for one?
Whats that connector thing on the egr valve called that the pcv and vaccum lines hook too? And what do I need to connect the pcv to my new setup?
Other than these questions I think I'm pretty set, I've got the throttle cable/bracket picked out, the choke cable (I'm going with a manual choke), air cleaner.
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Postmaster
Joined: Dec 2006
Posts: 3,603
Likes: 10
From: Spokane, WA
For low to mid range performance the Offy Dual Port. For high speed performance the Offy C. The DP has a 4 hole carb mount and the C is open. With the DP you are pretty much limited to 4V carbs. With the C you have the option of 4v or 2v carbs.
You may need a spacer for carb linkage/manifold clearance. With a DP that would be a 4 hole spacer. With the C an open spacer or even a 4 hole spacer would work.
The carb has a large port for the hose from the PCV to the Carb. If you are using EGR there is a Timed Port on the carb to plumb to. Also, if using EGR you will need an adapter plate available from Edelbrock. There is a metering device inside the EGR that comes in different sizes which may or may not have to be changed for your application.
Obtain a repair manual (Like Chilton's) that covers the year of your vehicle and read the Tech information on carb installation available on Holley's web site.
Since this is a modification from purely stock there most likely will be some tuning/tinkering involved. Rarely does anything work just right out of the box.
Good luck!
You may need a spacer for carb linkage/manifold clearance. With a DP that would be a 4 hole spacer. With the C an open spacer or even a 4 hole spacer would work.
The carb has a large port for the hose from the PCV to the Carb. If you are using EGR there is a Timed Port on the carb to plumb to. Also, if using EGR you will need an adapter plate available from Edelbrock. There is a metering device inside the EGR that comes in different sizes which may or may not have to be changed for your application.
Obtain a repair manual (Like Chilton's) that covers the year of your vehicle and read the Tech information on carb installation available on Holley's web site.
Since this is a modification from purely stock there most likely will be some tuning/tinkering involved. Rarely does anything work just right out of the box.
Good luck!
Mountain Pass
Joined: Dec 2004
Posts: 123
Likes: 1
From: Maryland
I went with the DP and a 390 CFM Holley 4180, and EFI manifolds. Saw a huge increase in power, even with my 2.75 rear, and didn't have any issues with accelerator pump bogging. The 600 might be a little much for the cubic inches you're running, particularly with the stock cam... You also have to fab up a throttle bracket to adapt to the 4 bbl. Coincidentally, i just pulled my 300 in favor of a 302, so I still have the complete setup, which will bolt right on...you can PM me if you are interested in it. It's only 5 months old.
