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Search found 741 matches

by F-250 Restorer
Wed Sep 23, 2020 6:29 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Harland Sharp rocker arms
Replies: 3
Views: 94

Re: Harland Sharp rocker arms

I use the ARP studs with 7/16 into the head, and 3/8" shaft that the Harlan Sharp rockers bolt onto. They are packaged for sbc. I've used them for 10+ years. I used to regularly rev to 6k+. Never a whimper. USE ARP STUDS. Or worry.
by F-250 Restorer
Wed Sep 23, 2020 2:35 pm
Forum: 240-300 "Big Block" Six Performance
Topic: QuadraJet on a 300
Replies: 94
Views: 15382

Re: QuadraJet on a 300

Special indeed!!! With 35 year old technology. Hours logged: referring g to hours drive time with Q jet. It seems from you experience the q jet is a powerful contender for this engine. Maybe superior , all things considered, cost included, to any other. Is that too great a claim? That is a good que...
by F-250 Restorer
Wed Sep 23, 2020 11:58 am
Forum: 240-300 "Big Block" Six Performance
Topic: QuadraJet on a 300
Replies: 94
Views: 15382

Re: QuadraJet on a 300

Very interesting stuff. Thanks for sharing. I love how the old design carbs have returned in new incarnations: The Autolite 4100, with its annular fuel boosters, has returned as a Holley/Autolite hybrid, via the Summit Racing carb, made by Holley, and still using the booster design that was cutting ...
by F-250 Restorer
Tue Sep 22, 2020 11:07 pm
Forum: 240-300 "Big Block" Six Performance
Topic: QuadraJet on a 300
Replies: 94
Views: 15382

Re: QuadraJet on a 300

Lovely. Would a cold air intake tube change the issue with rising temperatures? The install is so clean. How many hours have you logged on that carb? And give us a sense of its performance experience How many hours? Uh ... um, well, that is difficult to say. I would say a lot. Just the process of s...
by F-250 Restorer
Tue Sep 22, 2020 10:38 pm
Forum: 240-300 "Big Block" Six Performance
Topic: QuadraJet on a 300
Replies: 94
Views: 15382

Re: QuadraJet on a 300

Thanks for the tip. I've been wanting to do something like that, but thought I'd have to adapt a oem system. I think a cool air system will improve performance and mpg. I'll look into it. About summarizing the performance: I get long, strong pulls in each gear. I came back to the Quadrajet because o...
by F-250 Restorer
Mon Sep 21, 2020 9:03 pm
Forum: 240-300 "Big Block" Six Performance
Topic: QuadraJet on a 300
Replies: 94
Views: 15382

Re: QuadraJet on a 300

I love this carb! It purrs! I had to adjust the AFR (mix) twice. It changed when I closed the hood, due to the heat of the engine/headers/both. I can't wait to dial in the APT (adjustable part throttle) setting that raises/lowers the metering rods in the jets and allows me to obtain the best possibl...
by F-250 Restorer
Thu Sep 17, 2020 8:51 pm
Forum: 240-300 "Big Block" Six Performance
Topic: QuadraJet on a 300
Replies: 94
Views: 15382

Re: QuadraJet on a 300

80broncoman wrote:I allways like the Q jet as long as you weren't fighting worn throttle shafts.
My fav way of adjusting the secondays was to bend the hanger.


Oh! I'm sure the QJ gods will forgive you, ha ha.
by F-250 Restorer
Thu Sep 17, 2020 1:53 pm
Forum: 240-300 "Big Block" Six Performance
Topic: QuadraJet on a 300
Replies: 94
Views: 15382

Re: QuadraJet on a 300

I had to recalibrate my QJ to a larger cam. I'm hoping that the small primaries (220 cfm) will add a bit of pep to the low end that I lost due to cam selection. I began by removing the idle tubes and opening the restriction to .038. The restriction is the small end of the tube in the photo. That tub...
by F-250 Restorer
Sat Sep 05, 2020 12:39 pm
Forum: 240-300 "Big Block" Six Performance
Topic: 1 piece oil pan gasket always leaks
Replies: 11
Views: 1656

Re: 1 piece oil pan gasket always leaks

Hey AbandonedBronco: The engine has been together for some time now, about ... a year? Yes, I did use bolts on the rounded section of the t.cover/pan. But I'm really happy about the seal of the pan using the studs and the long stiffening straps that sit along each side of the pan, used oem during th...
by F-250 Restorer
Sat Sep 05, 2020 12:19 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Larger Valves NLA?
Replies: 4
Views: 236

Re: Larger Valves NLA?

I've been using SBC valves in my 300 head for about 10 years w/o issue. You will need to have the oem studs removed so that you can replace them with ARP screw in studs. I used SBC studs as well. If you are going to install an after market cam and springs, it would be a good idea to run all metal ti...
by F-250 Restorer
Wed Sep 02, 2020 2:35 pm
Forum: 240-300 "Big Block" Six Performance
Topic: QuadraJet on a 300
Replies: 94
Views: 15382

Re: QuadraJet on a 300

Regarding a QJ with turbo. GM put a turbo 800 cfm QJ on a 231ci v6 in ... iirc a buick regal? It was a draw thru system. I said it was turbo. It was. Turbocharger, by definition, is forced induction. Wikipedia: A turbocharged version was introduced as the pace car at the 1976 Indianapolis 500, and ...
by F-250 Restorer
Tue Sep 01, 2020 9:10 pm
Forum: 240-300 "Big Block" Six Performance
Topic: QuadraJet on a 300
Replies: 94
Views: 15382

Re: QuadraJet on a 300

Regarding a QJ with turbo. GM put a turbo 800 cfm QJ on a 231ci v6 in ... iirc a buick regal? I believe I have a photo of an 800 cfm QJ that came oem on a Tempest ohc I6. https://i.imgur.com/Qp7NY5x.png Gramps: I searched around and could not find my recorded specs for my QJ. What you need to do is ...
by F-250 Restorer
Fri Aug 28, 2020 3:11 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Synthetic Oil?
Replies: 8
Views: 305

Re: Synthetic Oil?

Red rose racer wrote:Clifford sometime back said use only10w30 on there site,but I think it may have been on engine brake in not sure.


Thanks, but you would be wise to not consider Clifford an expert.
by F-250 Restorer
Fri Aug 28, 2020 12:33 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Synthetic Oil?
Replies: 8
Views: 305

Synthetic Oil?

I have a fairly new rebuilt engine with not far under 10,000 miles on it. Are there any pros/cons to running a synthetic oil?
by F-250 Restorer
Sat Aug 22, 2020 11:54 am
Forum: 240-300 "Big Block" Six Performance
Topic: QuadraJet on a 300
Replies: 94
Views: 15382

Re: QuadraJet on a 300

Couple of points that I would like to add to my F250 300 4.9L information. Yes the headers are long tube Headman style. What a PITA when starter goes out. I have a set of refurbished EFI exhaust manifolds that will replace the headers when I install the new intake. I currently run a Holley 2300 2bb...
by F-250 Restorer
Sun Aug 16, 2020 9:38 pm
Forum: 240-300 "Big Block" Six Performance
Topic: QuadraJet on a 300
Replies: 94
Views: 15382

Re: QuadraJet on a 300

F250 Restorer, I have a basic fresh stockish rebuilt 300 in a F250 with headers, Pertronix & dual exhaust, 19" vacuum. If you had a choice would you run a Offy DP or a open chamber Clifford set up like a Offy C? The word in your description that jumps out at me is: headers. I'm assuming th...
by F-250 Restorer
Thu Aug 13, 2020 11:58 am
Forum: 240-300 "Big Block" Six Performance
Topic: Good Mileage Carb/Intake Combination with Offy DP or Clifford 4V
Replies: 37
Views: 1328

Re: Good Mileage Carb/Intake Combination with Offy DP or Clifford 4V

After reading an untold number of posts about mileage and carb choices, I began to see a common thread. The commonality I noticed was that mpg seemed to be dictated by the rear end gear ratio. Those with the high ratios (4.10, 3.74) were reporting unremarkable mpg findings. Those with gear ratios ar...
by F-250 Restorer
Wed Aug 12, 2020 11:33 am
Forum: 240-300 "Big Block" Six Performance
Topic: The Best Looking 300's!
Replies: 1
Views: 417

The Best Looking 300's!

I was digging through my files and found some old photos of very nice 300's. The info about who these belong to is long gone. Sorry. In review I noticed that #3 was not a 300! So #3 is disqualified! "You're out!" #1, imo: https://i.imgur.com/3bsMebC.jpg #2 is for bada...ness! https://i.img...
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: 754

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: 2156

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: 1266

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: 1936

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: 73
Views: 7848

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: 4620

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: 3678

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: 3678

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: 66
Views: 8879

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: 1093

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: 1093

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: 11
Views: 1656

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: 1127

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: 4243

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: 5712

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: 5712

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: 1350

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: 1521

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: 2291

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: 2095

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: 5383

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: 32
Views: 3723

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: 2095

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: 2095

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: 2095

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: 2095

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: 2095

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: 2095

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: 1976

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: 2634

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: 1976

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: 1976

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?

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