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Installing an Edelbrock 1406 on a 68 289

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20K views 21 replies 14 participants last post by  66sprint200  
#1 · (Edited)
So this is my plan for replacing my 4100 with an Edelbrock 1406 carb:

Factory 4-hole cast iron manifold. C4 trans.

1) Replace factory aluminum spacer with 1" phenolic

2) Use an adapter in the 1406's rear port for PCV.

3) Plug the front PCV vacuum port on the 1406

4) Move the coil.

5) Run rubber fuel line between the factory engine hard line and a banjo fitting on the back of the 1406 with an in-line fuel filter.

6) Modify throttle push rod for ball-joint type of throttle fitting.

7) Source electric choke 12V from Pertronix Igniter switched 12V.

8) Pop on the the factory air cleaner.

9) Fire it up.

Does that about cover it? Now for some questions:

1) Where should I relocate the coil to from the top of the intake manifold? I've seen pictures of the coil mounted to the front of the passenger head but can't tell how that's done.

2) Do you guys make a custom hard line that brings fuel to the back of the carb instead of using rubber fuel line?

EDIT: Found this http://www.summitracing.com/parts/sum-g1532/media/images

3) Will attaching the choke to the Pertronix 12V cause any issues?

4) Is the port on the back of the 1406 adequate for PCV use? (I feel that tapping a port into a phenolic spacer might be a less robust solution).

EDIT: Just found this on the Edelbrock web site:

Q: Can I run my PCV line to the rear of the carburetor?
A: We do not recommend routing the PCV line to the rear of the carburetor. We recommend that the PCV line go to the front, if you have power brakes, they go to the rear.

Now, despite that, has anybody had problems using the rear port for the PCV?

5) What fuel filter is recommended? It would be nice to pick up a filter at NAPA instead of ordering an Edelbrock brand filter.

6) Will there be any vacuum leak issues with the 1406-to-phenolic-spacer-to-factory 4 hole intake?

Thanks!

- Alex O.
 
#2 ·
Use an adapter in the 1406's rear port for PCV.
I believe the manual states that the front port is the PCV port.
Down load the manual off the edel site, dont think you can use the rear port.

4spd or Auto ?
If auto get the Lokar kit for kick down and throttle bracket, nice stuff.
 
#3 ·
I read the manual already. It does indicate that the front port is the official PCV port but makes no mention of the plugged port in the rear that looks plumbed for PCV.

Thanks for the heads-up on the lokar kit. Is it necessary? Won't the factory kick-down that's part of the throttle pedal bracket (1968) work?
 
#4 · (Edited)
1) Where should I relocate the coil to from the top of the intake manifold? I've seen pictures of the coil mounted to the front of the passenger head but can't tell how that's done.

I moved mine to the driver side head. There should be an existing accesory tapped hole there.

2) Do you guys make a custom hard line that brings fuel to the back of the carb instead of using rubber fuel line?

I used braided SS with AN fittings.

3) Will attaching the choke to the Pertronix 12V cause any issues?

Don't have Pertronix so no help there. I ran a dedicated wire from the accessory post in the ignition switch.

4) Is the port on the back of the 1406 adequate for PCV use? (I feel that tapping a port into a phenolic spacer might be a less robust solution).

Yes. That is where mine is connected as well.

5) What fuel filter is recommended? It would be nice to pick up a filter at NAPA instead of ordering an Edelbrock brand filter.

I used an in-line filter from Earls that also has AN fittings but if you're using rubber fuel line you can pick one up at NAPA with barbed fittings.

6) Will there be any vacuum leak issues with the 1406-to-phenolic-spacer-to-factory 4 hole intake?

4 hole spacer? Use a gasket top and bottom and you should be good to go. Don't forget to get extra long carb studs.

+1 on the Lokar kickdown cable. Simple setup!
 
#5 ·
Do NOT use the rear port on the Edelbrock carb for PCV! Edelbrock states that rear port is for the power brake booster only for a reason.

Case in point... I recently installed a Edelbrock 1403 to my '68 along with timing chain, Weiand intake (converted 2 to 4 barrel). Had help from a shop that specialized in mustangs do some of the work. They routed PCV to the rear carb port because it "looks better".

The car stalled on me every time it warmed up (or got hot). Could not figure out what was wrong. Finally decided to run the PCV to the front "PCV port" on the carb and block the rear port. The car has not stalled since, even with hard driving.
 
#13 ·
I have used the back port for PCV with no problems with mine, couldn't tell the difference in running. However i read somewhere that when you use the back port, the air that is sucked in doesn't mix very well with the fuel mixture and could cause the back cylinders to run lean. This is because the back port is closest to the secondary's which are only operated at 3/4 to full throttle.. So i am now running pcv from the front port.
 
#14 ·
Thanks for the insight. I was thinking that Ford's original ported spacer pulled from the secondaries but looking closer at one, the vacuum is ported internally from the primaries whereas the Edelbrock is pulled from the secondaries. I guess I'm running from the front as well as much as I hate the looks/plumbing of it. :crybaby:
 
#16 ·
On my 68 with5.0L or 302, Also run the PVC into the rear of carb. Power brake vac line is routed successfully into a brass tree on intake at rear which also serves the auto trans vac line. Have a line fuel filter low from the fuel line. Run a steel line along pass side of intake, hooking up to a short line with a routing to carb via banjo fitting. Re throttle linkage....Car has a C-4 trans, an original pedal with the original kickdown. The original dogleg throttle rod works great as is with one addition. The front of that rod has a right angle bend with about 3/4" Now, on driver side, the Edelbrock has the throttle brass linkage along side of carb and conveniently, has a small hole, perfect for that right angle bend to attach. Drill a very small hole in the end of rod attach with a thin cotter pin and a flat washer. The return spring is attached and the dogleg rod is back in business just like original. Kickdown works perfect- don't see any need here for Lokar. The Edelbrock that am using is a 500 cfm with manual choke, on a Weiand Stealth intake. Only have space enough to run a 1/4-3/8" thick phenolic spacer.
 
#18 ·
I have been using a 1406 for over 20 years now almost completely trouble free. I have the pcv in the front port all that time. But I am getting rid of it soon for just performance reasons. Im going to miss that port for the pcv.
 
#19 ·
I have my Edelbrocn a stock cast iron intake with the stock spacer using the PCV port on the spacer, no issues. I would not connect the choke to the coil supply. Nether one will work well that way. It's like trying to fill a swimming pool with a garden hose. Yes the hose will fill it...eventually. The coil a wire along with all the harness wiring simply has too much resistance, the wiring is not large enough! I have my HEI and choke fed by a #10 AMG fused wire using the ignition switch to fire a relay to control the choke and HEI wiring. It works great this way! Garbage in garbage out.

The wire to the coil has a resistor wire in series cutting voltage to the coil. Yes, if you put one wire of a volt meter to the coil wire and the other wire from the meter to ground, you will measure 12v all day long but you're measuring voltage to the coil incorrectly.
 
#20 ·
I've already wired the Pertronix from a connector on the regulator that's fed from the switched side of the ignition and not from the resistor wire. I was more concerned that the heat element on the choke (I'm assuming that's what the choke wire powers) would pull down the feed to the Ignitor.
 
#22 ·
I used this ( below ) fuel line along w/ the factory line from the fuel pump -- only needed an approx. 2-3" length of rubber hose between the two. Had to tweak the angle of both gas hard lines so they aligned correctly. Dean
http://www.summitracing.com/parts/sum-g1532/media/images