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Search found 723 matches

by F-250 Restorer
Tue Jul 14, 2020 12:17 am
Forum: 240-300 "Big Block" Six Performance
Topic: Help me pick a cam
Replies: 7
Views: 274

Re: Help me pick a cam

I was looking at the 131h in the FAQ, you think it will have any negative effect on off idle torque? Im running the 140H in my bronco. With a standard NP435. The rpm range is 2400-6000. I was informed by members here that that range is for a 240. In a 300, the whole range moves down by about 1000 r...
by F-250 Restorer
Mon Jul 06, 2020 11:04 pm
Forum: 240-300 "Big Block" Six Performance
Topic: The BC backcountry basher
Replies: 45
Views: 826

Re: The BC backcountry basher

I like to cut the original head pipes off just ahead of the cat and add a merge collector instead of the aftermarket T-pipe. Same here. I've used the flowmaster y-collector a couple times and really like the way it sounds. Seems to be the smoothest transition available commercially. I've got cliffo...
by F-250 Restorer
Sun Jun 14, 2020 9:04 pm
Forum: 240-300 "Big Block" Six Performance
Topic: starter woes
Replies: 18
Views: 544

Re: starter woes

Does anyone know the outcome of this problem? I'm curious about what he found.

I too use the Clifford shorty headers, wrapped. With them I run a starter from a '94 that is not wrapped.
by F-250 Restorer
Wed Apr 01, 2020 12:12 am
Forum: 240-300 "Big Block" Six Performance
Topic: DEGREEING THE DAMPER
Replies: 10
Views: 1659

Re: DEGREEING THE DAMPER

That is an excellent trick/tip. Thanks for sharing your knowledge.
by F-250 Restorer
Wed Mar 04, 2020 11:58 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Next build phase-Intake and ignition
Replies: 72
Views: 6483

Re: Next build phase-Intake and ignition

I started with a DS2 dizzy and an MSD 6a. Then I tried the gm 4 pin module. It was a noticeable downgrade in performance. I then ordered the Summit box. At that time Summit had a box with more output than an MSD 6a. It too produced a noticeable reduction in performance when compared to the 6A. I am ...
by F-250 Restorer
Wed Mar 04, 2020 11:36 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Starter fitment
Replies: 40
Views: 3696

Re: Starter fitment

You may find that shims (or washers) are required.

I have a 77 300. Both with a c6 and a zf5, when I changed to a efi starter for a 300, auto or manual accordingly, I had to install shims to move the starter away from the mounting surface.
by F-250 Restorer
Thu Feb 20, 2020 12:38 am
Forum: 240-300 "Big Block" Six Performance
Topic: Oil pumps and oil pans
Replies: 9
Views: 2415

Re: Oil pumps and oil pans

There were steel oil pan rail stiffening supports available. They fit in the lipped rail if the pan, and then the assembly was bolted down. It was a pair, one for each long side. They helped provide a better seal against leaks. I dont have any pics. They came on the efi trucks. Below is my best on ...
by F-250 Restorer
Thu Feb 20, 2020 12:31 am
Forum: 240-300 "Big Block" Six Performance
Topic: Oil pumps and oil pans
Replies: 9
Views: 2415

Re: Oil pumps and oil pans

I wanted to chip in regarding my experience with the Melling hv oil pump. I ran one for nearly 10 years. It churned butter thick 20/50 oil for that entire time. I used a hardened $10 shaft, hooked to a DS2 distributor that was newly rebuilt when the hv pump went on the new engine. I never had a prob...
by F-250 Restorer
Thu Feb 20, 2020 12:16 am
Forum: 240-300 "Big Block" Six Performance
Topic: Cylinder heads valves and rockers
Replies: 41
Views: 4770

Re: Cylinder heads valves and rockers

There was just one odd head that was not mentioned: Some 1982 300 heads had ridges in the combustion chambers. No one to this point has been able to explain why or in which models the ridges were found. https://i.imgur.com/gTbawb3.jpg https://i.imgur.com/B6JN5Fb.jpg
by F-250 Restorer
Mon Jan 06, 2020 1:49 am
Forum: 240-300 "Big Block" Six Performance
Topic: Big cam small cam:
Replies: 5
Views: 934

Re: Big cam small cam:

280* adv., 220@.050, .475 lift int. and exh., 112LSA
by F-250 Restorer
Sun Jan 05, 2020 10:29 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Big cam small cam:
Replies: 5
Views: 934

Big cam small cam:

I wanted to post some observations that I have made regarding changing from a mildly built engine to what might be considered a highly built engine. My previous 300 had hyper pistons (.030 over) with cast rings, an Isky 256 cam, stock rockers, msd with a DS2 ignition, an Offy DP intake and a 485 cfm...
by F-250 Restorer
Sun Dec 15, 2019 6:06 pm
Forum: 240-300 "Big Block" Six Performance
Topic: 1 piece oil pan gasket always leaks
Replies: 8
Views: 1284

Re: 1 piece oil pan gasket always leaks

I used studs on the pan, except where they would prevent pan from being pulled straight down, and I have not leaded a single drop.

Image
by F-250 Restorer
Wed Nov 13, 2019 2:02 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Power Steering
Replies: 5
Views: 938

Re: Power Steering

There are three types that I know of: The aluminum efi era one for a serpentine belt, the huge ford pump type, and the type ford made for the Saginaw pumps it put on Econoline vans with the 300. I agree with everything BigBlue94 said about the Saginaw pump. I would only add one thing: If you're ever...
by F-250 Restorer
Fri Oct 25, 2019 1:34 am
Forum: 240-300 "Big Block" Six Performance
Topic: california CARB, exemption questions
Replies: 33
Views: 3701

Re: california CARB, exemption questions

Are we forgetting that he who shall not be named has recently struck down Cal's right to set its own emissions laws? I expect Cal's laws to change drastically in the coming years.
by F-250 Restorer
Fri Oct 25, 2019 12:36 am
Forum: 240-300 "Big Block" Six Performance
Topic: Loss of compression in all cylinders
Replies: 43
Views: 4879

Re: Loss of compression in all cylinders

AB, man, I am sorry to see and hear that. I have experienced engine failure and know that it is a painful thing.

In several ways, cam, head, pistons, bore, my build mirrors yours, so I'm on pins and needles to hear the cause. K.
by F-250 Restorer
Sun Oct 20, 2019 9:45 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Loss of compression in all cylinders
Replies: 43
Views: 4879

Re: Loss of compression in all cylinders

I saw a youtube vid. Eric the car guy had a cheapo leak down tester. When it failed he simply took the valve out of the end of his compresssion tester hose, and used it to blow air into the chamber, listened at the intake, exhaust, and looked for bubbles in radiator. Same thing, kinda.
by F-250 Restorer
Wed Oct 16, 2019 1:46 am
Forum: 240-300 "Big Block" Six Performance
Topic: Oil pan gasket
Replies: 2
Views: 1263

Re: Oil pan gasket

I did the same with my 75 pan. Iirc, I also put a tad of gasket maker on the corners around the rear of block where gasket goes up and around the main cap. I may have gone overboard, but I also used studs instead of bolts on the pan, except for the ones that are angled. Be very careful to tighten th...
by F-250 Restorer
Fri Oct 04, 2019 8:08 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Carb Options For Offy Dual Plane on 240
Replies: 4
Views: 1399

Re: Carb Options For Offy Dual Plane on 240

I am in So.Cal and had the same heat issue with a DP and a Summit 600 carb. I now use a Holley, and don't have any heat problems. Just for clarification, I only had the problem during hot summer days. My truck is a 75. When I installed the DP and 4v carb, I converted to a Locar 48" cable. It wa...
by F-250 Restorer
Sun Sep 29, 2019 12:59 pm
Forum: 240-300 "Big Block" Six Performance
Topic: EFI Manifolds
Replies: 10
Views: 2084

Re: EFI Manifolds

Anyone ever ordered the aftermarket efi manifolds such as the ones off eBay for $200? I have been looking for a used set but haven’t come across one yet. Have you tried the Pick-n-Pull yards in Kansas City. Checking on line there appears to be 6 possible trucks there with 4.9L engines. Possibly at ...
by F-250 Restorer
Sat Sep 21, 2019 11:33 am
Forum: 240-300 "Big Block" Six Performance
Topic: Ignition woes
Replies: 15
Views: 1780

Re: Ignition woes

I wanted to find a couple of NOS (new old stock) Motorcraft replacement stator assemblies to have when my AutoZone one dies. I bought one on ebay and got this:

Image
by F-250 Restorer
Tue Sep 17, 2019 3:08 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Edelbrock DP Modification
Replies: 29
Views: 4893

Re: Edelbrock DP Modification

So, is modifying an Edelbrock DP the same as modifying an Offenhauser DP? Ha ha.
by F-250 Restorer
Sun Sep 15, 2019 1:46 pm
Forum: 240-300 "Big Block" Six Performance
Topic: 300 Mild Build for 1941 International Pickup
Replies: 31
Views: 2891

Re: 300 Mild Build for 1941 International Pickup

That looks like a very nice truck. That distributor is a knock-off, a cheap copy, made, most likely, in Mexico. I think you'll have better luck getting a used motorcraft on ebay or in the J/Y and having it rebuilt and recurved, or even putting in the Summit HEI distributor for that engine. With the ...
by F-250 Restorer
Fri Sep 13, 2019 8:12 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Ignition woes
Replies: 15
Views: 1780

Re: Ignition woes

Side note: original stator lasted 44 years. Replacement lasted 1!!!! One stinking year. Oh boy. When the heater core when out in my 68 F100 last fall, I was shocked to find it was the original. Just don't make parts like they used to. Also, when I mentioned that it lasted one year, that means about...
by F-250 Restorer
Fri Sep 13, 2019 4:33 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Ignition woes
Replies: 15
Views: 1780

Re: Ignition woes

Thanks for the help,guys. Set it back to original t.setting, flipped the wires, and issue was gone. I,m starting to think you guys know what you,re talking about.

Side note: original stator lasted 44 years. Replacement lasted 1!!!! One stinking year. Oh boy.
by F-250 Restorer
Fri Sep 13, 2019 10:45 am
Forum: 240-300 "Big Block" Six Performance
Topic: Ignition woes
Replies: 15
Views: 1780

Re: Ignition woes

Wallen7: I believe I tried to swap the wires and it wouldn't start with them reversed. But I will look into it again. Thx. Muller9: The cap, with brass contacts, is looking bad. I burn 3-4 caps a year. They love me at O'reiley's where I get new caps gratis, due to lifetime warranty. I don't believe ...
by F-250 Restorer
Thu Sep 12, 2019 9:41 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Ignition woes
Replies: 15
Views: 1780

Re: Ignition woes

I am running $120 super duper msd wires.
by F-250 Restorer
Thu Sep 12, 2019 7:53 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Ignition woes
Replies: 15
Views: 1780

Re: Ignition woes

Darn auto correct. Post was supposed to say MSD, not Mad.
by F-250 Restorer
Thu Sep 12, 2019 7:48 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Ignition woes
Replies: 15
Views: 1780

Ignition woes

Hey there. 1975 300, newly rebuilt with 8k miles. I was driving and engine just died at 40mph. No cough or stumble, just dead. Ok, figured mad or stator pick up. Tested mad, but had intermittent power to keyed hot..battery Showed same. New battery installed and got power to all systems. After testin...
by F-250 Restorer
Sun Sep 01, 2019 2:28 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Advance curve
Replies: 12
Views: 1683

Re: Advance curve

Here it is for all to see, a step by step how-to adjust/dial in your vacuum advance. (It really bugs me when people prowl the forum to sell you something.) Step 1. Determine the range of vacuum advance adjustment. Insert a 1/8" Allen wrench into the vacuum advance port and engage the adjustment...
by F-250 Restorer
Sun Sep 01, 2019 1:02 pm
Forum: 240-300 "Big Block" Six Performance
Topic: to keep ur calm an' cool...cabin insulation
Replies: 7
Views: 2473

Re: to keep ur calm an' cool...cabin insulation

During a make over of my 75 F250, I decided to insulate the floor and doors. After looking and reading up on some of the products available, I was unable to buy them at such a price. Instead, I went to Lowes and bought some rolls of duct insulation for $17 per roll. I used less than two. https://i.i...
by F-250 Restorer
Thu Aug 29, 2019 10:21 am
Forum: 240-300 "Big Block" Six Performance
Topic: Advance curve
Replies: 12
Views: 1683

Re: Advance curve

I use mid grade fuel. I can use low grade, but the engine will run on once in a while.

Does anyone have useful tips on how to set the vacuum advance, what v. it should come in at, etc.
by F-250 Restorer
Wed Aug 28, 2019 2:01 am
Forum: 240-300 "Big Block" Six Performance
Topic: Advance curve
Replies: 12
Views: 1683

Re: Advance curve

My understanding is that v.advance is supposed to be set up to come in at high v. (lower rpms) and then as v. drops with the higher rpm's, the v.advance stops, instead of tacking on extra advance in high rpm's? Or am I misunderstanding it?
by F-250 Restorer
Tue Aug 27, 2019 11:14 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Advance curve
Replies: 12
Views: 1683

Re: Advance curve

pmuller9 wrote:That is early. Normally the mechanical advance is all in by around 2500 rpm for a modified curve.
How well is it running?
Is there any detonation?


It runs well, if possibly a bit subdued. No detonation. Shouldn't centrifugal+vacuum equal around 36*?
by F-250 Restorer
Tue Aug 27, 2019 9:52 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Advance curve
Replies: 12
Views: 1683

Advance curve

I have a fairly new engine. Today I marked my balancer to ck advance. I was surprised to find I have 20* mechanical all in at 1700 rpm. Add to that the 16* initial, and that gives me 36* very early, right? Then I checked it with vacuum connected and got another 10* by 2,000 rpm. I wonder if someone ...
by F-250 Restorer
Tue Aug 27, 2019 11:31 am
Forum: 240-300 "Big Block" Six Performance
Topic: Extrude Hone for 300/4.9L engines
Replies: 21
Views: 2243

Re: Extrude Hone for 300/4.9L engines

Here is a heads up at what you would be doing with the head for 300 hp. First, this is what a pre 1987 non EFI head looks like with SBC 2.02" intake and 1.60" exhaust valves. These valve have the undercut stems above the valve head. https://www.dropbox.com/s/flxsujxo4gqcr9k/Polished%20Cha...
by F-250 Restorer
Sun Aug 25, 2019 12:27 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Edelbrock avs2 1901
Replies: 12
Views: 2319

Re: Edelbrock avs2 1901

I have a 1901 edelbrock with EFI manifolds, it was great with the stock cam, now with the Schneider 140h it is a tad temperamental when cold and will boil over if I shut it down after a hard run. I will say the driveability of the carb is phenomenal. Thanks for the feedback. The fact that it will b...
by F-250 Restorer
Fri Aug 23, 2019 9:07 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Permanent 300 Six Cyl Head CFM solutions- A Work in Progress
Replies: 504
Views: 104286

Re: Permanent 300 Six Cyl Head CFM solutions- A Work in Progress

Is there a link to where I can check the flow results and the prices for the diff. heads?
by F-250 Restorer
Tue Aug 20, 2019 10:54 am
Forum: 240-300 "Big Block" Six Performance
Topic: Chebby rockers and comp cam?
Replies: 21
Views: 2126

Re: Chebby rockers and comp cam?

Get ARP rocker studs for a small block chevy, and seal the threads since the threads enter a water passage. Get good quality valve springs, keepers and retainers--like the ones comp recommends for that cam. With your engine I'd use a DP intake, and run a Holley 1850, 600 cfm. That will give you grea...
by F-250 Restorer
Sat Aug 17, 2019 7:00 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Totally lost (jumpy when accelerating, vapor lock issues, not starting uphill)
Replies: 3
Views: 645

Re: Totally lost (jumpy when accelerating, vapor lock issues, not starting uphill)

a lot more info would be helpful. did u modify the engine? age condition etc. symptoms point to fuel issues, either supply, or calibrations. and of course summer heat transmission? is engine in excellent tune? poor tune? always begin with ignition even if all signs point to another source for ur pr...
by F-250 Restorer
Fri Aug 16, 2019 8:59 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Woodruff key availability
Replies: 13
Views: 1796

Re: Woodruff key availability

I purchase a small kit from headbolts.com. For $8.95 you get: Engine finishing kit Ford 240 / 300 / 4.9 liter inline six cylinder engines 2 cylinder Head to block Dowels .6745 x .435 2 Cam Thrust Plate Bolts 5/16-18 x 3/4 Cap Screw, Hex Drive 1 Woodruff Key 3/16 x 1-3/4 1 Cam Key 3/16 x 3/4 1 cam sn...
by F-250 Restorer
Thu Aug 15, 2019 1:43 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Best Exhaust.
Replies: 23
Views: 2476

Re: Best Exhaust.

Shorty headers are usually used to eliminate fitment issues and is a compromise for producing torque. In every dyno test that I have seen clearly shows a loss of power throughout the entire power band when using a shorty header versus a long tube header. There was no advantage anywhere including lo...
by F-250 Restorer
Wed Aug 14, 2019 8:06 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Best Exhaust.
Replies: 23
Views: 2476

Re: Best Exhaust.

"...helpful at higher rpm but not really in a pickup." Ah, from what I have read, long tube headers are for top end, whereas shorties are for low end torque. For the 300 six: Long tube small diameter primary tube headers work best for low end torque. Long tube larger diameter primary tube...
by F-250 Restorer
Wed Aug 14, 2019 1:01 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Best Exhaust.
Replies: 23
Views: 2476

Re: Best Exhaust.

headers when EFI manifolds are available, are a headache. helpful at higher RPM but not really in a pickuo. noisy, leaky and prone to rust., they will draw heat away from head, which is sometimes helpful, but will deposit most of it in the engine compartment... "...noisy, leaky and prone to ru...
by F-250 Restorer
Tue Aug 13, 2019 7:36 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Best Exhaust.
Replies: 23
Views: 2476

Re: Best Exhaust.

Unless you need headers the EFI exhaust is a nice clean way to go that gets rid of the heat problems on the intake manifold and makes the it so you can run a stock starter that you can find any where in your travel, I will be changing out to EFI later this summer. You can find an efi era starter as...
by F-250 Restorer
Tue Aug 13, 2019 9:30 am
Forum: 240-300 "Big Block" Six Performance
Topic: Best Exhaust.
Replies: 23
Views: 2476

Re: Best Exhaust.

The Hedman long tube header has two issues: It seals in your starter, so it is best to use an efi era mini starter, or you'll be using clamps and pry bars to R&R your starter when it fails. Secondly, it creates A LOT of heat. That heat will create vapor lock issues in the summer that will make y...
by F-250 Restorer
Fri Aug 09, 2019 6:57 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Two belts on alternator with a Saginaw Pump?
Replies: 18
Views: 1996

Re: Two belts on alternator with a Saginaw Pump?

Great. Glad it worked. I'm just curious about belt routing and wondering if there is something that you know that eludes me. I mean that in regard to your p/s belt routed over the w/pump pulley as well, and not simply from balancer pulley to p/s? Is that oe routing? Maybe I am seeing the photo wrong...
by F-250 Restorer
Wed Aug 07, 2019 6:39 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Two belts on alternator with a Saginaw Pump?
Replies: 18
Views: 1996

Re: Two belts on alternator with a Saginaw Pump?

I seem to retain odd bits of info that I pick up here and there from forum threads. One of them is that when you change an older 300 to serpentine belt system, you need to change the water pump because the w/pumps of that era spun reverse to the older w/pumps. That's only if he has the really old w...
by F-250 Restorer
Wed Aug 07, 2019 12:31 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Two belts on alternator with a Saginaw Pump?
Replies: 18
Views: 1996

Re: Two belts on alternator with a Saginaw Pump?

I seem to retain odd bits of info that I pick up here and there from forum threads. One of them is that when you change an older 300 to serpentine belt system, you need to change the water pump because the w/pumps of that era spun reverse to the older w/pumps. Using the v belt system, he would need ...
by F-250 Restorer
Tue Aug 06, 2019 8:45 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Two belts on alternator with a Saginaw Pump?
Replies: 18
Views: 1996

Re: Two belts on alternator with a Saginaw Pump?

I went through this. Either get a pulley for the p/s with a diff. offset, or as the other member mentioned but not directly, use one large belt to encircle both the p/s and the alt. Here is the pulley that would/should put the pulley in the groove closest to the radiator: https://www.summitracing.co...
by F-250 Restorer
Tue Aug 06, 2019 9:23 am
Forum: 240-300 "Big Block" Six Performance
Topic: Edelbrock avs2 1901
Replies: 12
Views: 2319

Re: Edelbrock avs2 1901

I have a 1901 edelbrock with EFI manifolds, it was great with the stock cam, now with the Schneider 140h it is a tad temperamental when cold and will boil over if I shut it down after a hard run. I will say the driveability of the carb is phenomenal. Thanks for the feedback. The fact that it will b...

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