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Search found 302 matches

by 1986F150six
Tue Apr 29, 2014 11:31 am
Forum: 240-300 "Big Block" Six Performance
Topic: Distributor theory 101...
Replies: 19
Views: 2225

Re: Distributor theory 101...

I am enjoying reading the input and am gaining a better understanding [the purpose of the thread]. Thanks to everyone for taking the time to respond!

I hope others may gain a better understanding, as well.
by 1986F150six
Tue Apr 29, 2014 11:20 am
Forum: 240-300 "Big Block" Six Performance
Topic: comp cams oval track
Replies: 9
Views: 1629

Re: comp cams oval track

I don't have the cam card in front of me but am 99% sure that is the same cam in this vintage dirt track car. This is my 14 year old grandson on the track in his 2nd practice session on the track. He had raced go carts before but first time in a race car. With the gear we had in that day we were tu...
by 1986F150six
Mon Apr 28, 2014 8:28 am
Forum: 240-300 "Big Block" Six Performance
Topic: air horns?
Replies: 5
Views: 1073

Re: air horns?

Or, perhaps this?

viewtopic.php?f=1&t=69172
by 1986F150six
Fri Apr 25, 2014 7:18 am
Forum: 240-300 "Big Block" Six Performance
Topic: Distributor theory 101...
Replies: 19
Views: 2225

Distributor theory 101...

I am seeking collective wisdom for what might be common knowledge, but something I have missed. Yesterday, I purchased a replacement distributor cap and rotor. My truck is a 1986, which has been converted to Duraspark, so I purchased parts designated for 1983. Through my life, I have replaced these ...
by 1986F150six
Fri Apr 25, 2014 7:00 am
Forum: 240-300 "Big Block" Six Performance
Topic: problems after engine swap. oil light is quie, runs terrible
Replies: 6
Views: 1186

Re: problems after engine swap. oil light is quie, runs terr

Did you swap out the oil sending unit when you switched engines? Perhaps the sending unit is not compatible with your "idiot light" set-up? See if you can find a mechanical oil pressure guage and temporarily install it where the oil pressure sending unit is. That way you can get an accurat...
by 1986F150six
Tue Apr 15, 2014 7:23 am
Forum: 240-300 "Big Block" Six Performance
Topic: Carby height
Replies: 9
Views: 1899

Re: Carby height

This is some interesting reading and might provide an idea or two.

http://www.ford-trucks.com/forums/95279 ... 300-a.html
by 1986F150six
Mon Apr 07, 2014 3:30 pm
Forum: 240-300 "Big Block" Six Performance
Topic: MPG experiment... [4.9L/300 engine prefers low revs]
Replies: 20
Views: 5667

Re: MPG experiment...[4.9L/300 engine prefers low revs] - UP

The weather is moderating and I always notice improved mileage with warmer temperatures. [ less choke usage and switch from winter blend gasoline? ] Here are some updated figures. Sometimes, I dream of "hopping up" the engine, but when I am reminded of how well this combination actually pe...
by 1986F150six
Mon Mar 31, 2014 9:29 am
Forum: 240-300 "Big Block" Six Performance
Topic: Re-jetting a Carter YF?
Replies: 9
Views: 2546

Re: Re-jetting a Carter YF?

Is it possible that your truck has a vacuum leak causing the lean condition?
by 1986F150six
Thu Mar 20, 2014 8:12 am
Forum: 240-300 "Big Block" Six Performance
Topic: MPG experiment... [4.9L/300 engine prefers low revs]
Replies: 20
Views: 5667

Re: MPG experiment... [4.9L/300 engine prefers low revs]

When I wanted gas mileage I put 247k miles on a '94 FESTIVA. THAT was a thrill ride you won't find at SIX FLAGS. The thrill entirely depends how long it took you to put those 247k on it. I once averaged 85ish mph over a 5k oil change (not in my truck).[/ quote] And, your 5000 mile oil change interv...
by 1986F150six
Tue Mar 11, 2014 1:45 pm
Forum: 240-300 "Big Block" Six Performance
Topic: MPG experiment... [4.9L/300 engine prefers low revs]
Replies: 20
Views: 5667

MPG experiment... [4.9L/300 engine prefers low revs]

I retain fuel consumption records reflecting my very reproducible weekly driving pattern. This is for a 1986 F150 with 4.9L engine, 4 speed manual overdrive, 3.08 rear gears, 215/75 X 15 tires, Duraspark conversion and I drive for economy. I drive 5 days a week to and from work. I live in and pass t...
by 1986F150six
Wed Feb 26, 2014 9:19 am
Forum: 144-250 "Small Block" Six Performance
Topic: Damper Lesson Learned
Replies: 9
Views: 1323

Re: Damper Lesson Learned

I considered that too. Odds are I'll probably tune to the point of peak vaccume now. Haven't looked yet to see if the timing cover bolts will come out without a lot of hassle. I've never tuned to vaccume before but it might be time to give that a go. I'm definitely learning on this machine though. ...
by 1986F150six
Wed Feb 26, 2014 8:57 am
Forum: 240-300 "Big Block" Six Performance
Topic: Low manifold vacuum
Replies: 5
Views: 930

Re: Low manifold vacuum

Have you tried adjusting the timing while reading the vacuum? Does the vacuum reading vary as you rotate the distributor?
by 1986F150six
Wed Feb 26, 2014 8:15 am
Forum: 240-300 "Big Block" Six Performance
Topic: Observations regarding ambient temperature and MPG.
Replies: 4
Views: 972

Observations regarding ambient temperature and MPG.

I shared this on the FTE forum and thought it might be of interest to owners of trucks powered by relatively stock 4.9L/300s.

http://www.ford-trucks.com/forums/12999 ... ature.html
by 1986F150six
Tue Feb 25, 2014 9:27 am
Forum: 240-300 "Big Block" Six Performance
Topic: 300 IL6 Engine Height
Replies: 4
Views: 804

Re: 300 IL6 Engine Height

Perhaps this link will help:

viewtopic.php?t=20500&highlight=
by 1986F150six
Thu Feb 20, 2014 3:29 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Please bear with me...
Replies: 6
Views: 929

Re: Please bear with me...

Thank you all for your responses. The reason I posted in the "small six" forum was to draw from their experience with the smaller carburetors.
by 1986F150six
Thu Feb 20, 2014 11:38 am
Forum: 240-300 "Big Block" Six Performance
Topic: Please bear with me...
Replies: 6
Views: 929

Re: Please bear with me...

Cute! Thanks for your input, JackFish.
by 1986F150six
Thu Feb 20, 2014 9:58 am
Forum: 240-300 "Big Block" Six Performance
Topic: Please bear with me...
Replies: 6
Views: 929

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: 3481

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: 1756

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: 2418

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: 2418

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: 660

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: 3898

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: 2129

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: 7435

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: 4007

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: 7166

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: 10380

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: 1355

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: 914

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: 10380

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: 914

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: 2378

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: 971

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: 899

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: 1451

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: 1451

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: 899

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: 762

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: 762

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: 1132

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: 2615

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: 1240

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: 4256

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: 2004

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: 2004

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: 1399

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...

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