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Search found 284 matches

by 1986F150six
Thu Feb 20, 2014 9:58 am
Forum: 240-300 "Big Block" Six Performance
Topic: Please bear with me...
Replies: 6
Views: 831

Please bear with me...

Greetings, I have a question which can best be answered by you "small block six" gurus. It has to do with specific carburetion applications. I drive a 1986 F150 with 4.9L engine and 4 speed manual OD. It has been converted to Duraspark ignition and the feedback carburetor was replaced with...
by 1986F150six
Tue Feb 18, 2014 1:19 pm
Forum: 240-300 "Big Block" Six Performance
Topic: LS1 heads .... again
Replies: 23
Views: 3047

Re: LS1 heads .... again

And we appreciate your historical perspective, The Frenchtown Flyer. Thank you for your input!
by 1986F150six
Thu Feb 13, 2014 12:13 pm
Forum: 240-300 "Big Block" Six Performance
Topic: oil temperature sending unit location ?
Replies: 8
Views: 1513

Re: oil temperature sending unit location ?

StrangeRanger wrote:VDO makes a sender that replaces the drain plug in the oil pan.
Of course, that means you need to use a VDO gauge


That is good information, StrangeRanger. Thanks for sharing!
by 1986F150six
Wed Feb 05, 2014 10:32 am
Forum: 240-300 "Big Block" Six Performance
Topic: Exhaust Manifold Clips
Replies: 11
Views: 2156

Re: Exhaust Manifold Clips

Whew, I can see it all now, a bungalow down in LA (lower Alabama), a year long pier pass at the State Park, blissful living as only the Redneck Riviera can deliver. I'm so ... happy. Thanks guys. Dr. Jay, Since you are located in north Alabama, you should know that folks in Leighton also say they l...
by 1986F150six
Mon Feb 03, 2014 1:26 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Exhaust Manifold Clips
Replies: 11
Views: 2156

Re: Exhaust Manifold Clips

Very nice. Thanks for posting the photos!
by 1986F150six
Tue Jan 28, 2014 2:01 pm
Forum: 240-300 "Big Block" Six Performance
Topic: OEM head gaskets
Replies: 4
Views: 581

OEM head gaskets

From time to time, engine build threads make mention of having to deck blocks or shave the head to compensate for "today's" thicker head gaskets, when compared to the original one. I saw an eBay item which is a pair of NOS Ford 240 head gaskets. If they are of interest to anyone, I'll incl...
by 1986F150six
Thu Jan 16, 2014 1:55 pm
Forum: 240-300 "Big Block" Six Performance
Topic: CARB THEORY
Replies: 26
Views: 3489

Re: CARB THEORY

After reading this thread while it centered around the Mikuni BN48 as an alternative to the Carter, I searched and found something which was new to me. I wrote about it on Ford Truck Enthusiasts Forums and decided to post a link. The information is about a Zenith model #228 carburetor which is adver...
by 1986F150six
Wed Jan 15, 2014 8:45 am
Forum: 240-300 "Big Block" Six Performance
Topic: custom 4 barrel intake out of Factory FI intake
Replies: 12
Views: 1875

Re: custom 4 barrel intake out of Factory FI intake

I am not trying to be a nay-sayer and will follow your thread with great interest, but in previous threads about this idea a couple of concerns were raised and will likely need to be addressed. #1 The runners are long and were designed to be run "dry" [air only], so may or may not perform ...
by 1986F150six
Fri Dec 06, 2013 7:07 am
Forum: 240-300 "Big Block" Six Performance
Topic: MPG out of a T18/T19 or NP435
Replies: 42
Views: 6849

Re: MPG out of a T18/T19 or NP435

Alright, was able to pick up a T18 at the pull a part over the weekend. Per guhfluh advice, I think I will just keep the 300. Also picked up the later EFI exhaust to add. Another question. How will the MPG be effected if I gear the rear up to a 2.50. Is that going to be overkill? I can get them off...
by 1986F150six
Mon Dec 02, 2013 10:33 am
Forum: 240-300 "Big Block" Six Performance
Topic: Possible coolant sensor locations?
Replies: 19
Views: 3471

Re: Possible coolant sensor locations?

1984-1986 vehicles with 4.9L should have the thermostat housing with the port you are seeking. These vehicles had the computer controlled feedback carburetor and this port held the sensor for the computer. Perhaps the one on the 1985 donor had been changed by a previous owner?
by 1986F150six
Tue Nov 26, 2013 11:48 am
Forum: 240-300 "Big Block" Six Performance
Topic: 240 Swap
Replies: 47
Views: 6723

Re: 240 Swap

Most likely you are referring to the coolant sensor, shanesdentist.
by 1986F150six
Mon Nov 25, 2013 9:09 am
Forum: 240-300 "Big Block" Six Performance
Topic: big six max rpm
Replies: 82
Views: 9383

Re: big six max rpm

That is innovative! Thanks for sharing.
by 1986F150six
Fri Nov 22, 2013 7:35 am
Forum: 240-300 "Big Block" Six Performance
Topic: Milling head and chamber volume
Replies: 8
Views: 1188

Re: Milling head and chamber volume

I was once asked to do this in a design review meeting. Discussion turned to how many shifts it was going to take the drafting room to calculate this. I said I could have the answer in under an hour. After the meeting I took a cylinder head, laid it chamber side down on a Xerox machine, and made a ...
by 1986F150six
Mon Nov 18, 2013 9:23 am
Forum: 144-250 "Small Block" Six Performance
Topic: Help - Vacuum Connection on Carter YF
Replies: 6
Views: 773

Re: Help - Vacuum Connection on Carter YF

Thanks for the information! Just so I have it clear the top port pictured is for clean make up air and should not be connected to anything? I can unplugged it and leave it open to the air? Thanks again! It should be connected to a metal tube which passes throught the exhaust manifold and on to the ...
by 1986F150six
Wed Nov 13, 2013 2:25 pm
Forum: 240-300 "Big Block" Six Performance
Topic: big six max rpm
Replies: 82
Views: 9383

Re: big six max rpm

Hey ftf do you think one of those tbi injection systems would benefit from say 7-10 psi boost to move the air and fuel through ive been toying with the idea of a power adder but i am afraid it will be too much for the street ;-) I cannot say - I have no experience with boosted TBI systems. A booste...
by 1986F150six
Tue Nov 12, 2013 4:16 pm
Forum: 144-250 "Small Block" Six Performance
Topic: Help - Vacuum Connection on Carter YF
Replies: 6
Views: 773

Re: Help - Vacuum Connection on Carter YF

That top vacuum port is as JackFish said, to supply clean make-up air to the tube which is part of the exhaust manifold. Once the air is heated, it goes through an insulated metal tube to the choke housing. This hot air is drawn into the choke housing by a small vacuum port located within the choke ...
by 1986F150six
Fri Nov 08, 2013 8:32 am
Forum: 240-300 "Big Block" Six Performance
Topic: 79 f150 carb adapter
Replies: 13
Views: 2083

Re: 79 f150 carb adapter

Everyone: Please forgive this brief hijack... :oops:

Dr Jay, where in north Alabama are you located? I am in northwest Alabama.
by 1986F150six
Wed Oct 23, 2013 10:52 am
Forum: 144-250 "Small Block" Six Performance
Topic: Header Flange
Replies: 4
Views: 859

Re: Header Flange

Explorer, Here is a link for a set for 240/300 engines. Contact them. Perhaps they can make one for your 200. They also offer an aluminum one. http://www.ebay.com/itm/Ford-240-300-Straight-Inline-6-six-Exhaust-Flanges-/221302826620?pt=Motors_Car_Truck_Parts_Accessories&hash=item3386ad267c&vx...
by 1986F150six
Wed Oct 16, 2013 9:07 am
Forum: 240-300 "Big Block" Six Performance
Topic: Questions regarding carburetor mixture...
Replies: 3
Views: 833

Re: Questions regarding carburetor mixture...

Thank you, gentlemen, for your responses! motzingg, the engine does run better with the choke completely opened, I was just illustrating that there seems to be less of an ill effect when slightly rich as opposed to when slightly lean. Another observation is that the lean caused stumbling [during war...
by 1986F150six
Tue Oct 15, 2013 9:08 am
Forum: 144-250 "Small Block" Six Performance
Topic: mount some model Weber to a '69 250
Replies: 19
Views: 1228

Re: mount some model Weber to a '69 250

Thank you, xctasy, for making this permanent! Do you think the "top hat" portion was added to help offset the volume decrease due to the flattened area just above the carburetor?
by 1986F150six
Mon Oct 14, 2013 2:00 pm
Forum: 144-250 "Small Block" Six Performance
Topic: mount some model Weber to a '69 250
Replies: 19
Views: 1228

Re: mount some model Weber to a '69 250

chad, Previously, you have mentioned wanting more air filter to hood clearance. I saw this and thought of you. It is an an example of when someone thinks outside the normal envelope. Perhaps it will give you some ideas! http://www.ebay.com/itm/Holley-Carburetor-One-Barrel-For-Ford-200-Six-Cylinder-C...
by 1986F150six
Mon Oct 14, 2013 9:55 am
Forum: 240-300 "Big Block" Six Performance
Topic: Questions regarding carburetor mixture...
Replies: 3
Views: 833

Questions regarding carburetor mixture...

My vehicle has 4.9L with Carter YF and manual choke. The weather has changed [cooler] recently and the rate at which I can open the choke has changed. This allows me more time to think about choke operation and notice the results of too much or too little choke until the engine is up to operating co...
by 1986F150six
Fri Oct 11, 2013 7:33 am
Forum: 240-300 "Big Block" Six Performance
Topic: Innovative choke heater!
Replies: 3
Views: 729

Re: Innovative choke heater!

Did you notice the large hole in the choke plate? I wonder if that modification was made due to the slower opening rate of the choke, since it would take longer for the bimetallic spring to be heated?
by 1986F150six
Thu Oct 10, 2013 3:45 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Innovative choke heater!
Replies: 3
Views: 729

Innovative choke heater!

Look how someone modified the choke to be heated by the radiator coolant. Some older carburetors were manufactured this way by the factory, but not Carter YF or YFAs. http://www.ebay.com/itm/NOS-1983-1984-1985-1986-1987-1988-FORD-F-150-RANGER-300-CARTER-CARBURETOR-7806s-/400586637300?pt=Motors_Car_T...
by 1986F150six
Fri Sep 13, 2013 6:48 am
Forum: 240-300 "Big Block" Six Performance
Topic: running on four cylinders
Replies: 6
Views: 1001

Re: running on four cylinders

80broncoman wrote:since you replaced the exh manifold I'd say of course you hadthe inake manifold off as well.
I think you should look for a possible intake gasket leak.


Good call, 80broncoman!
by 1986F150six
Mon Sep 09, 2013 10:28 am
Forum: 240-300 "Big Block" Six Performance
Topic: Does the 240/300 have secondary harmonic vibes?
Replies: 17
Views: 2303

Re: Does the 240/300 have secondary harmonic vibes?

Probably a simplistic suggestion, but since you have revealed that this condition existed with the 240, could it be something externally driven [i.e. fan blade, alternator, P/S pump, etc.]?
by 1986F150six
Thu Sep 05, 2013 2:36 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Carburetion - how many CFM are required?
Replies: 3
Views: 1164

Carburetion - how many CFM are required?

I hope this link will be the beginning of some interesting conversation. :D

P.S. Any mistaken math or quotes are my fault.

http://www.ford-trucks.com/forums/12658 ... st13504510
by 1986F150six
Thu Aug 29, 2013 2:06 pm
Forum: 240-300 "Big Block" Six Performance
Topic: 3ott column shift manual
Replies: 18
Views: 3776

Re: 3ott column shift manual [old thread revisited]

Yes, it is an old thread and no, I am not the one who has this listed on Ebay. This is an elusive part and perhaps it will benefit someone. I hope so. :D http://www.ebay.com/itm/NOS-1980-1987-FORD-F100-F150-F250-F350-BRONCO-COLUMN-SHIFT-GEAR-SHIFT-SOCKET-/290968691958?pt=Motors_Car_Truck_Parts_Acces...
by 1986F150six
Fri Aug 16, 2013 9:36 am
Forum: 240-300 "Big Block" Six Performance
Topic: Pumping loss definition...
Replies: 8
Views: 1839

Re: Pumping loss definition...

Thank you, tom954X4, for taking the time and effort to reply. I apoligize for the delay in my response, but I have been "out of pocket" for a couple of days.
by 1986F150six
Mon Aug 12, 2013 11:41 am
Forum: 240-300 "Big Block" Six Performance
Topic: Pumping loss definition...
Replies: 8
Views: 1839

Pumping loss definition...

I would like a further understanding of pumping losses. Is it similar to a syringe with a blocked needle, when one is trying to pull the piston out and meets resistance? What I am trying to equate this illustration to is what the engine's pistons are doing when the trottle plate is closed or partial...
by 1986F150six
Wed Jul 17, 2013 3:14 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Tach installation on DSII with GM ign. Module??
Replies: 5
Views: 1266

Re: Tach installation on DSII with GM ign. Module??

See if someone you know has a spare tachometer laying around. Connect it to the negative side of the coil and see how it works. The fact that the dwell meter/tachometer works fine, connected to the negative side of the coil, leads me to believe the Sun Pro tachometer is defective. You stated that yo...
by 1986F150six
Wed Jul 17, 2013 3:03 pm
Forum: 240-300 "Big Block" Six Performance
Topic: New here with a question
Replies: 10
Views: 1399

Re: New here with a question

Keep checking for vacuum leaks. The fact that the idle speed is affected when you spray carb cleaner indicates there is still a leak. Sometimes there is a small vacuum port [tube] near the bottom of the carburetor. Make sure all ports are either connected to a tube or have a rubber/vinyl cap on them...
by 1986F150six
Mon Jul 15, 2013 1:29 pm
Forum: 240-300 "Big Block" Six Performance
Topic: New here with a question
Replies: 10
Views: 1399

Re: New here with a question

Look closely for vacuum leaks. Make sure you used a gasket and that the two hold down bolts are secure. Check for open vacuum ports and/or missing vacuum hoses or cracked plastic lines. Listen for a hissing sound while the engine is running. Many use carburetor cleaner and spray around any suspected...
by 1986F150six
Mon Jul 15, 2013 12:02 pm
Forum: engine tech
Topic: The new OLD FTF gets a "Duesenberg DOHC 4-valve"
Replies: 230
Views: 95491

Re: The new OLD FTF gets a "Duesenberg DOHC 4-valve"

What a wonderful project! Thanks for sharing with us.
by 1986F150six
Wed Jun 19, 2013 2:01 pm
Forum: Turbo, Supercharger, and Nitrous
Topic: Turbo projects - could this be used?
Replies: 3
Views: 1692

Turbo projects - could this be used?

http://www.ebay.com/itm/80-PONTIAC-TRAN ... _127wt_932

I "stumbled" across this and thought it might be something one of you guys might be interested in? :?:
by 1986F150six
Wed Jun 19, 2013 12:26 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Turbo projects - could this be used?
Replies: 3
Views: 924

Turbo projects - could this be used?

Some of you are interested in adding a turbo. Would this help?

http://www.ebay.com/itm/80-PONTIAC-TRAN ... _127wt_932
by 1986F150six
Thu May 16, 2013 3:56 pm
Forum: 240-300 "Big Block" Six Performance
Topic: electronic distributer setup for a carbed 240 or 300
Replies: 35
Views: 5206

Re: electronic distributer setup for a carbed 240 or 300

greg_a_morton wrote:do you have a part number off hand?


This may be a double post... if so, I'm sorry!

SP 435 = copper

SP 452 = platinum

I'm using copper.
by 1986F150six
Thu May 16, 2013 3:43 pm
Forum: 240-300 "Big Block" Six Performance
Topic: electronic distributer setup for a carbed 240 or 300
Replies: 35
Views: 5206

Re: electronic distributer setup for a carbed 240 or 300

I use the extended Motorcraft plugs specified for 1987-1996 fuel injected 4.9L in my 1986 4.9L and have for some time.
by 1986F150six
Wed May 08, 2013 11:21 am
Forum: 240-300 "Big Block" Six Performance
Topic: in need of some help please
Replies: 3
Views: 839

Re: in need of some help please

When the intake manifold has no source of heat, especially directly under the carburetor, the incoming air/fuel charge collides with a comparatively cold metal surface and the fuel condenses into droplets. It is fuel vapor which easily ignites, not liquid. The original log intake and exhaust were jo...
by 1986F150six
Thu Apr 25, 2013 10:06 am
Forum: 144-250 "Small Block" Six Performance
Topic: Sun Distributor Machine
Replies: 9
Views: 1186

Re: Sun Distributor Machine

This is what a Sun Distributor Machine looks like. Just thought the viewers might be interested when mentioned adjusting the advance curve on a distributor. http://img.photobucket.com/albums/v293/wsa111/Sun%20Distributor%20Machine/e5523367-2672-4b53-8676-94c967a524bb_zps1abab4d1.jpg Definitely &quo...
by 1986F150six
Mon Apr 22, 2013 10:11 am
Forum: 240-300 "Big Block" Six Performance
Topic: Another question to aid understanding...
Replies: 2
Views: 650

Re: Another question to aid understanding...

Again, I say, "Thank you", for taking your time and making the effort to better help me understand. I appreciate the clarification regarding preignition vs. detonation.

Hopefully, there are others who now better understand.
by 1986F150six
Thu Apr 18, 2013 11:57 am
Forum: 240-300 "Big Block" Six Performance
Topic: Another question to aid understanding...
Replies: 2
Views: 650

Another question to aid understanding...

The 1984-1986 4.9L engines have the "feedback" system. In previous threads, it has been explained that if a sensor fails or if the sensor has been removed, the computer will default to the "safe" or "limp home" mode causing the carburetor to go rich and the distributor ...
by 1986F150six
Thu Apr 18, 2013 9:49 am
Forum: 240-300 "Big Block" Six Performance
Topic: Questions regarding theory and function...
Replies: 2
Views: 686

Questions regarding theory and function...

Good morning, I have a question which most may think as being simple, but I would like to better understand what sometimes is taken for granted, since normally the symptoms are easily corrected by mere adjustments. 1. Fuel mixture control by choke : If an automatic choke is properly adjusted [initia...
by 1986F150six
Wed Apr 10, 2013 11:11 am
Forum: 240-300 "Big Block" Six Performance
Topic: Engine tune
Replies: 18
Views: 1647

Re: Engine tune

Just an idea... it is hard to understand pinging with the initial timing set @ 5 degrees BTDC, as you now have it. Your vacuum is so low... hmm? Is it possible that your harmonic balancer has slipped? That would give you false or inaccurate timing figures. How about setting your timing at idle by us...
by 1986F150six
Wed Apr 03, 2013 4:27 pm
Forum: 144-250 "Small Block" Six Performance
Topic: new exhaust side pipe
Replies: 5
Views: 851

Re: new exhaust side pipe

Years ago, I had a 1200cc VW Beetle equipped with a header and glasspack muffler. It, too, was loud! I fabricated a restrictor plate for the outlet and experimented with drilling holes in the plate. It was amazing that with just a little bit of restriction [many holes drilled], the sound level was l...
by 1986F150six
Thu Mar 28, 2013 3:43 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Take a close look at this log intake manifold!
Replies: 2
Views: 1038

Take a close look at this log intake manifold!

I noticed this on eBay. Look closely at what appears to be a heat sink attached to where the intake manifold originally connects to the exhaust manifold. Hmmm? :?: http://www.ebay.com/itm/Straight-6-ford-300-Intake-Manifold-/230952311203?pt=Motors_Car_Truck_Parts_Accessories&hash=item35c5d499a3&...
by 1986F150six
Tue Mar 19, 2013 10:31 am
Forum: 240-300 "Big Block" Six Performance
Topic: free 300 what to do?
Replies: 63
Views: 6588

Re: free 300 what to do?

To: The Frenchtown Flyer

Thank you, sir, for your response! I hope you locate the missing "Mr. Smith" and when you do, please include information regarding the prototype 2 barrel intake manifolds as well as information about the variable displacement attempt.

Good day!