Click Here -> Please Consider Making a PayPal Contribution to the FordSix Forum!
2019 Contributors:
NJwpod, 1strodeo, mightynorseman, maxtrux, 6d7coupe, broncr, Phase3, 68Flareside240, bmbm40, mustang6, WorldChampGramp, justintendo, BigBlue94, ags290, motorsickle1130, Rooster, ousooner919, ethanperry, rzcrisis, DoctorC, jamyers, Motorboy, fastpat, Silverback280, chad, drag-200stang, THE FRENCHTOWN FLYER, Jimmys61falcon, rjonah, Sooshi, Robert92867, Invectivus


PLEASE TEST ON http://dev.fordsix.com

<<<***PLEASE READ*** New Site Update >>>

Search found 269 matches

by Blairsville Ed
Sat Aug 01, 2020 12:44 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Fan Shroud
Replies: 7
Views: 166

Fan Shroud

1968 F100 240 I had some cooling issues a while back with a steel fan with a clutch and no shroud. The simple fix was with a nylon 6 blade, 18 inch fan mount 7/8” from the radiator. It worked well but now I have cooling issues while running the AC and driving in slow moving traffic. The only change ...
by Blairsville Ed
Mon Jul 27, 2020 10:55 am
Forum: 240-300 "Big Block" Six Performance
Topic: Adjustable cam gear
Replies: 45
Views: 1380

Re: Adjustable cam gear

On the Ford 4.0 L. V-6, the camshaft gears are not keyed to the cam. They are held in time with a fixture And the bolt torque is all that holds them in position.
by Blairsville Ed
Sun Jul 26, 2020 8:15 am
Forum: 240-300 "Big Block" Six Performance
Topic: Adding an evap system
Replies: 14
Views: 430

Re: Adding an evap system

Pardon my ignorance.... So, the way the system operates is that vapors coming from the carb and tank pass THROUGH the charcoal canister to open air with the HC’s attaching to the carbon grains. Ported vacuum draws air through the canister and picks up the HC’s and burns the air and HC mixture. In a ...
by Blairsville Ed
Sat Jul 25, 2020 10:03 am
Forum: 240-300 "Big Block" Six Performance
Topic: Adding an evap system
Replies: 14
Views: 430

Re: Adding an evap system

I’m shopping for the charcoal canister and I have a few concerns. I have a sealed gas tank with a gas cap that has a vacuum valve and an over pressure release. When the outside temp rises there’s a pressure build up in the tank. If the charcoal canister has a port for the tank and the carb bowl, cou...
by Blairsville Ed
Thu Jul 23, 2020 11:10 am
Forum: 240-300 "Big Block" Six Performance
Topic: Adding an evap system
Replies: 14
Views: 430

Re: Adding an evap system

Venting the tank:

I was considering removing the steel filler neck and welding a threaded bung to it.
Would that suffice for the gas tank vent?
by Blairsville Ed
Wed Jul 22, 2020 7:43 am
Forum: 240-300 "Big Block" Six Performance
Topic: Adding an evap system
Replies: 14
Views: 430

Re: Adding an evap system

I think I’m starting to understand the system. I need a charcoal canister which seems to be easy to buy. I need to vent the gas tank. Currently I’m using a non vented, 1969 Mustang tank. I’ve read that the vent should have a very small orifice so that only vapor can pass easily and not liquid. I con...
by Blairsville Ed
Sat Jul 18, 2020 8:17 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Adding an evap system
Replies: 14
Views: 430

Re: Adding an evap system

There is a carb bowl vent port.
Summer heat leads to a gas smell in my garage. That’s what I would like to correct.
I’m not sure how it is designed to work.
Gas fill tube needs to be vented?
How does the canister purge? And when does it purge?
by Blairsville Ed
Sat Jul 18, 2020 7:57 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Adding an evap system
Replies: 14
Views: 430

Adding an evap system

1968 F100 240, Weber 38. 2 barrel carb

Is it possible, practical , beneficial to add an evap system to control gas vapor loss?
by Blairsville Ed
Mon Jul 13, 2020 10:21 am
Forum: 240-300 "Big Block" Six Performance
Topic: MSD 6AL
Replies: 8
Views: 383

MSD 6AL

1968 F100 240 With stock distributor I have read a lot of praise on this forum for the MSD 6AL. I have read that it gives the best gas mileage and performance. I have a stock point and condenser distributor with the brass Contacts rotor and cap, Motorcraft points and condenser, helical wires and V g...
by Blairsville Ed
Wed Jul 08, 2020 4:30 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Cam for a 240
Replies: 12
Views: 557

Re: Cam for a 240

I’m currently running a 240 in a 1968 F100 with a 3.70 gear, 4 speed with overdrive, .005 beyond zero deck, Chevy rockers, mild porting, efi exhaust, Stock cam, stock intake with a Weber 2 barrel. I went with flat top 302 pistons and I use 87 octane with no issues but I’m at 2000 feet of elevation. ...
by Blairsville Ed
Sat Jul 04, 2020 3:10 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Distributor problem
Replies: 8
Views: 415

Re: Distributor problem

I have the stock point distributor but I found that the advance plate bushing can get a lot of wear at the pivot pin. My vacuum advance would pull the plate up a bit because the bushing was worn. The plate should not have a lot of play in it. Also there are nylon buttons underneath that support the ...
by Blairsville Ed
Wed Jun 24, 2020 12:57 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Tough warm start, but okay cold/hot starts?
Replies: 18
Views: 749

Re: Tough warm start, but okay cold/hot starts?

Snap disc switch is 104 F
I found them on eBay
Might be listed as 40 C
by Blairsville Ed
Mon Jun 22, 2020 10:24 am
Forum: 240-300 "Big Block" Six Performance
Topic: Decals
Replies: 1
Views: 166

Decals

Has anyone ever printed the fordsix logo into a decal?

I’m planning on attending the F100 grand nationals at Pigeon Forge and it would be fun to put a fordsix decal on the truck. It would be an easy way to meet other fordsix members.
by Blairsville Ed
Sat Jun 20, 2020 8:12 am
Forum: 240-300 "Big Block" Six Performance
Topic: Tough warm start, but okay cold/hot starts?
Replies: 18
Views: 749

Re: Tough warm start, but okay cold/hot starts?

I had the same problem with my 1968 F100, 240, Carter YF. With the engine running, the fan keeps the carb and intake manifold cool. When you shut it off, all the heat from the exhaust manifold starts to rise and heats up the intake manifold and the carb bowl. This may take 10 minutes or more. The ca...
by Blairsville Ed
Mon Jun 08, 2020 8:31 pm
Forum: Steering and Suspension
Topic: F100 ride height
Replies: 8
Views: 475

Re: F100 ride height

I’ll do a caster measurement tomorrow. The truck now has a 1 degree rise towards the back which I believe is to be added to the caster measurement.
I’ll check toe last.
by Blairsville Ed
Mon Jun 08, 2020 5:41 pm
Forum: Steering and Suspension
Topic: F100 ride height
Replies: 8
Views: 475

Re: F100 ride height

I’ve had the springs on for about 1000 miles. Today I did some spring cutting. I got the Frame to I beam distance to 4 inches which settled the camber in to 1 degree positive on the drivers side and 1.25 degrees positive on the drivers side. I was amazed. Just by correcting the height the camber ali...
by Blairsville Ed
Sun Jun 07, 2020 9:06 am
Forum: Steering and Suspension
Topic: F100 ride height
Replies: 8
Views: 475

Re: F100 ride height

I seen the Ford manual instructions concerning the 4 inch blocks. I have also been reading that Ford Originally had several front coil springs available. I guess that’s how they leveled the trucks, a heavier engine got stiffer coils. Current after market springs are very limited. If I measure the di...
by Blairsville Ed
Sat Jun 06, 2020 3:25 pm
Forum: Steering and Suspension
Topic: F100 ride height
Replies: 8
Views: 475

F100 ride height

1968 F100 2wd 240 Ride height: I installed a pair of Moog variable springs About 6 months ago, which lifted the front end about 1 inch. Camber is 2-1/4 degrees positive. What should the ride height be and where is it measured? I measured the distance from the frame to the I-beam at 4-3/4” For checki...
by Blairsville Ed
Tue Jun 02, 2020 10:22 am
Forum: 240-300 "Big Block" Six Performance
Topic: 240 - First Build
Replies: 9
Views: 443

Re: 240 - First Build

87 octane
But most of my driving is at or around 2000 feet of elevation
And I’m using a 160 degree thermostat with a oversized radiator
by Blairsville Ed
Tue Jun 02, 2020 9:02 am
Forum: 240-300 "Big Block" Six Performance
Topic: 240 - First Build
Replies: 9
Views: 443

Re: 240 - First Build

1968 F100, 240, was a 3 on the tree now it’s a 4 on the tree or some say a quad on the rod, 3.70 axle I started the same process in 2017. My bench mark test was to document the speed that I could maintain while towing my 16 foot fishing boat up a long grade here in North Georgia. My goal has been to...
by Blairsville Ed
Mon Jun 01, 2020 8:12 am
Forum: 240-300 "Big Block" Six Performance
Topic: Modified 240/300 Log Intake Manifold
Replies: 7
Views: 461

Re: Modified 240/300 Log Intake Manifold

I’ve been working on a new adapter plate for a Weber 38 carb. It includes a filler plate mounted in the plenum to remove as much dead space as possible and to have one barrel feed cylinders 1,2,3 and the other barrel feeds cylinders 4,5,6. It has made the 240 very responsive and my low end torque ha...
by Blairsville Ed
Sun May 24, 2020 8:46 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Sectioned 2 barrel log manifold
Replies: 15
Views: 1236

Re: Sectioned 2 barrel log manifold

One side affect..... there’s a solid jump when I’m in first gear and I touch the gas pedal.
I can’t seem to ease the gas pedal.
I may have to lengthen the throttle arm on the carb to increase the pedal travel.
I have a vacuum gauge on my bench. I could rig it in the cab.
by Blairsville Ed
Sun May 24, 2020 7:39 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Sectioned 2 barrel log manifold
Replies: 15
Views: 1236

Re: Sectioned 2 barrel log manifold

I haven’t driven enough yet.
Would a tight intake manifold lead to better mpg?
Also, I noticed that the efi exhaust manifolds have a hole with a screwed in plug. I may attemp to put an O-2 sensor in each manifold and monitor the voltages to verify the each barrel mixture is equal.
by Blairsville Ed
Fri May 22, 2020 8:41 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Sectioned 2 barrel log manifold
Replies: 15
Views: 1236

Re: Sectioned 2 barrel log manifold

I finished a new adapter plate and IR manifold divider. I angle milled each bore toward the runners and made a close fitting filler plate for the center of the plenum. I matched the filler plate bore to the adapter plate and used a ball end cutter to create a radius where it transitions to the manif...
by Blairsville Ed
Sun May 17, 2020 3:59 pm
Forum: 240-300 "Big Block" Six Performance
Topic: 1970 240 - what is normal?
Replies: 5
Views: 333

Re: 1970 240 - what is normal?

Is it heat soak? I have a 1968 240, F100. After I drove the vehicle a while and it was fully warmed up, then you shut it off, after 5 minutes the heat would rise up from the exhaust manifold and heat the carb bowl until the gas would percolate out of the Main Venturi. I solved this issue by installi...
by Blairsville Ed
Sun May 17, 2020 11:13 am
Forum: 240-300 "Big Block" Six Performance
Topic: 2 barrel carb question
Replies: 8
Views: 408

Re: 2 barrel carb question

Great info as usual!!! It appears that this Weber 38x38 carb is sensitive to slight throttle blade variation. It took a few tries but I now have the barrels feeding equally, or at least they start flowing at the same rpm. This involves the carb gear lash adjustment. It doesn’t take much mis- adjustm...
by Blairsville Ed
Sun May 17, 2020 8:26 am
Forum: 240-300 "Big Block" Six Performance
Topic: 2 barrel carb question
Replies: 8
Views: 408

Re: 2 barrel carb question

Is there a normal rpm for the main Venturis to start flowing? The Weber carb people boast that their carb will use the idle and transition circuits for normal cruise speed. I can’t imagine the idle and transition circuit delivering enough fuel at 2400 rpm cruise speed. I can adjust Main Venturi flow...
by Blairsville Ed
Sat May 16, 2020 3:28 pm
Forum: 240-300 "Big Block" Six Performance
Topic: 2 barrel carb question
Replies: 8
Views: 408

Re: 2 barrel carb question

This is the synced version with the gears that drive the throttles. It is adjustable and I did spend some time setting it so that the transition holes are uncovered at the same time. I also checked with feeler gauges to insure that both plates were opened the same amount when the transition holes we...
by Blairsville Ed
Sat May 16, 2020 1:23 pm
Forum: 240-300 "Big Block" Six Performance
Topic: 2 barrel carb question
Replies: 8
Views: 408

2 barrel carb question

I know that most of you who use a 2 barrel are using the 2100. I’m using a Weber 38/38 but perhaps this can be an issue with either carb. My question....... As I observe the carb operation, with no load, the motor is at idle and I start to increase the throttle while watching the main Venturis to se...
by Blairsville Ed
Sat May 02, 2020 10:33 am
Forum: 240-300 "Big Block" Six Performance
Topic: Sectioned 2 barrel log manifold
Replies: 15
Views: 1236

Re: Sectioned 2 barrel log manifold

I’m really interested in exploring a tight, split plenum. Low end torque is want I need. I wondering?????? Bolt in a piece of 1-1/2 x 1-1/2 aluminum bar stock into the center of the manifold that I currently have milled open. Make a new adapter plate with individual bores for my Weber 38, 2 barrel c...
by Blairsville Ed
Fri May 01, 2020 9:46 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Sectioned 2 barrel log manifold
Replies: 15
Views: 1236

Re: Sectioned 2 barrel log manifold

I should have waited until I had the carb before I made the plate. The carb company gave me the wrong bore spacing dimension. That’s why there’s a step in the bores.
When I get a chance, I’m going to make another one.
by Blairsville Ed
Fri May 01, 2020 8:29 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Sectioned 2 barrel log manifold
Replies: 15
Views: 1236

Re: Sectioned 2 barrel log manifold

My triangle plenum divider has a 1/2” wide flat on the top that has .100 clearance to the bottom of the adapter plate.
by Blairsville Ed
Fri May 01, 2020 7:48 am
Forum: 240-300 "Big Block" Six Performance
Topic: Sectioned 2 barrel log manifold
Replies: 15
Views: 1236

Re: Sectioned 2 barrel log manifold

I completed the manifold sectioning project. I machined a new spacer plate to fit the Weber 38/38 carb with individual holes for each barrel and I made a large triangle out of aluminum to separate the manifold plenum. I left a small space between the adapter plate and the top of the triangle. This k...
by Blairsville Ed
Thu Apr 16, 2020 6:05 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Sectioned 2 barrel log manifold
Replies: 15
Views: 1236

Sectioned 2 barrel log manifold

I have too much time on my hands..... Would there be a benefit to sealing a log manifold for a 2 barrel carb (MC 2150) so that the front barrel only feeds cylinders 1,2,3 and the rear barrel only feeds cylinders 4,5,6 ? Another idea would be to pipe the front barrel to feed the log at cylinder 2 and...
by Blairsville Ed
Mon Apr 06, 2020 8:38 am
Forum: 240-300 "Big Block" Six Performance
Topic: EFI on factory intake? Dependability?
Replies: 33
Views: 3276

Re: EFI on factory intake? Dependability?

1968 F100 240, quad on the rod I had the same problem, heat soak. I insulated the fuel line, made a heat shield, added an insulator. It helped but the problem persisted. My solution was to mount a large computer fan to the bottom of the air cleaner can and pointed it at the fuel bowl. I triggered it...
by Blairsville Ed
Mon Mar 02, 2020 9:10 pm
Forum: 240-300 "Big Block" Six Performance
Topic: "Better Spark Plug To Run In 300 4.9L Motor Electronic Dizzy??????
Replies: 17
Views: 2214

Re: "Better Spark Plug To Run In 300 4.9L Motor Electronic Dizzy??????

Before I got a Bridgeport mill I used a drill press with a cross slide table. It was primitive but it worked. Your goal should be to mill the mounting surface as flat as possible. Also, I’m not sure if I mentioned that the 2 holes that are in the intake casting, I tapped to 9/16 and put in threaded ...
by Blairsville Ed
Mon Mar 02, 2020 7:20 pm
Forum: 240-300 "Big Block" Six Performance
Topic: "Better Spark Plug To Run In 300 4.9L Motor Electronic Dizzy??????
Replies: 17
Views: 2214

Re: "Better Spark Plug To Run In 300 4.9L Motor Electronic Dizzy??????

I’m still running the stock 1968 ignition and I have experimented with the Holley 5200. I was trying to get the leanest mixture I could run without misfires. I would push the motor by lugging it a bit up hill trying to get misfires. I found the V tip plug, NGK 2438, to be more resistant to misfires ...
by Blairsville Ed
Tue Feb 11, 2020 3:28 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Variable Venturi carb
Replies: 5
Views: 1360

Re: Variable Venturi carb

Does the VV carb flow the same cfm as the 2100 ?
by Blairsville Ed
Tue Feb 11, 2020 7:51 am
Forum: 240-300 "Big Block" Six Performance
Topic: Variable Venturi carb
Replies: 5
Views: 1360

Variable Venturi carb

I seen a Motorcraft variable Venturi 2 barrel carb on eBay.
Does anyone know anything about this carb or has anyone used it on our sixes?
by Blairsville Ed
Mon Dec 30, 2019 7:00 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Connecting rod orientation
Replies: 3
Views: 730

Re: Connecting rod orientation

I think I found my answer. The rods have a larger chamfer on one side and the fillet is larger on the throws towards the front of the engine. That puts the bearing tangs towards the drivers side.
by Blairsville Ed
Mon Dec 30, 2019 6:04 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Connecting rod orientation
Replies: 3
Views: 730

Connecting rod orientation

I’ll be putting the rods on the pistons tomorrow. I should have checked the rod orientation when I pull the wrist pins..... my rods do not have the oiling hole so should the bearing tang side be on a particular side or no.
The pistons have the arrow cast in and I know that points forwards.
by Blairsville Ed
Mon Dec 30, 2019 5:05 pm
Forum: 240-300 "Big Block" Six Performance
Topic: 240 rod beam clean up
Replies: 18
Views: 2084

Re: 240 rod beam clean up

This motor may have had a rod replaced since 1 rod was much lighter than the rest. Fixturing for this process is a must. I made a pin to locate the small end and I used a large socket for the big end. The measurements were consistent but there still was a variation of up to 3 grams. I measured each ...
by Blairsville Ed
Mon Dec 30, 2019 4:48 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Cylinder bore finish
Replies: 45
Views: 5137

Re: Cylinder bore finish

Update: I finished honing the block today. I hone to 4.038, then I installed the head with gasket and torqued to Ford specs. I hone to 4.040 from the crankcase side. Cylinder #1 had the most distortion by far but all the bores were distorted. The hone was definitely banging on the high spot. I’m con...
by Blairsville Ed
Sun Dec 29, 2019 5:26 pm
Forum: 240-300 "Big Block" Six Performance
Topic: 240 rod beam clean up
Replies: 18
Views: 2084

Re: 240 rod beam clean up

I’ve have a stock 1968 240. It looks like Ford balanced the total rod weight. They were all within 3 grams, but when I check the big end weights they were 30 grams difference from the lightest to the heaviest.
Has anyone else seen this much variation ?
by Blairsville Ed
Fri Dec 27, 2019 9:01 pm
Forum: 240-300 "Big Block" Six Performance
Topic: 240 rod beam clean up
Replies: 18
Views: 2084

Re: 240 rod beam clean up

I was a little concerned about the bore gage scratching the bearing id so I used a mic on the crank with the bearing shells on the crank. It measured 2.273. I zeroed the bore gauge at 2.273 and re sized the rod bores to .0015 to .002 over that. Now..... balancing the rods. I’ve seen a few setups on ...
by Blairsville Ed
Thu Dec 26, 2019 7:08 pm
Forum: 240-300 "Big Block" Six Performance
Topic: 240 rod beam clean up
Replies: 18
Views: 2084

Re: 240 rod beam clean up

I’ll be doing the arp rod bolts. I found a good price on Amazon, 34.00. The shop manual calls for rod bearing clearance to be .0008 to .0015 preferred with up tp .0027 as acceptable. Whoever ground the crank went a little more than .010 under. Standard rod throw should be 2.1228. It’s at 2.112 now. ...
by Blairsville Ed
Thu Dec 26, 2019 10:53 am
Forum: 240-300 "Big Block" Six Performance
Topic: 240 rod beam clean up
Replies: 18
Views: 2084

Re: 240 rod beam clean up

Is the polishing and balancing something that benefits a daily driver which stays under 3000 rpm?
by Blairsville Ed
Wed Dec 25, 2019 11:19 am
Forum: 240-300 "Big Block" Six Performance
Topic: 240 rod beam clean up
Replies: 18
Views: 2084

Re: 240 rod beam clean up

If the rods are lightened from polishing, does the crankshaft need to be re balanced?
by Blairsville Ed
Tue Dec 24, 2019 3:14 pm
Forum: 240-300 "Big Block" Six Performance
Topic: 240 rod beam clean up
Replies: 18
Views: 2084

240 rod beam clean up

1968 F100 240
I’m preparing the motor for a re-build.
How important is it to clean up the connecting rod casting line running down the beam ?
Also any other tips on re-building ......
by Blairsville Ed
Sun Dec 15, 2019 10:35 am
Forum: 240-300 "Big Block" Six Performance
Topic: Hypereutectic piston ring gap
Replies: 2
Views: 580

Hypereutectic piston ring gap

The hypereutectic pistons that I’m using require 40% more top ring end gap than oem pistons. Is that correct and does anyone know why?