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Search found 656 matches

by F-250 Restorer
Thu Mar 14, 2019 12:11 am
Forum: 240-300 "Big Block" Six Performance
Topic: Harland Sharp roller rockers
Replies: 8
Views: 245

Re: Harland Sharp roller rockers

Tomorrow I start the new engine for the first time. Pmuller, I want to thank you for leading me the entire time, years, through the Blondie cam talks, helping me comprehend how a cam works, and so many other aspects of my build, from the 351w pistons, to the 67 rods, the r.rocker issue, adjusting th...
by F-250 Restorer
Mon Mar 11, 2019 1:07 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Harland Sharp roller rockers
Replies: 8
Views: 245

Re: Harland Sharp roller rockers

I agree with pmuller9, sounds like the stud top thread is not clean. With the rocker removed you should be able to run your poly lock all the way down by hand. You may have all ready made sure the polylock nut threads are OK. If the problem is the top threads you can chase them with a die even thou...
by F-250 Restorer
Sun Mar 10, 2019 4:20 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Harland Sharp roller rockers
Replies: 8
Views: 245

Re: Harland Sharp roller rockers

That is not normal. The nut has to have consistent inside tread in order for the set screw to work smoothly so something else is wrong. If you take the set screw out the nut should screw all the way down till the stud runs out of thread. If it gets tight along the way then the stud threads have a p...
by F-250 Restorer
Sun Mar 10, 2019 3:30 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Harland Sharp roller rockers
Replies: 8
Views: 245

Harland Sharp roller rockers

I have a new set of HS 3/8 stud roller rockers. They set right on the stud, but I notice that the nuts tighten up after just a few turns, before the nut hits bottom on the rocker mounting shaft. And that is with the Allen lock backed out. Is that normal? Are they designed to be tight like that so th...
by F-250 Restorer
Thu Feb 14, 2019 11:06 am
Forum: 240-300 "Big Block" Six Performance
Topic: Carb options
Replies: 33
Views: 1353

Re: Carb options

I have used the Summit carb on my truck. I was running a Hedman header and a DP intake which put the primary bowl right over the header, and I could not resolve the boiling fuel issue. I tried a heat shield, wrapping the fuel line, turning the carb around, all while using the insulating thick gasket...
by F-250 Restorer
Sun Feb 03, 2019 12:55 pm
Forum: 240-300 "Big Block" Six Performance
Topic: 300 l6 EFI rebuild
Replies: 3
Views: 378

Re: 300 l6 EFI rebuild

The best way to learn about how to proceed with your build is by doing a search on this forum and Ford Truck Enthusiasts. Read, copy/paste, take notes, read more, just like a school project, and then proceed. Confirm what people say with multiple forum members or sources. Good luck. I have an Iskida...
by F-250 Restorer
Sun Feb 03, 2019 12:46 pm
Forum: 240-300 "Big Block" Six Performance
Topic: What ignition system?
Replies: 10
Views: 546

Re: What ignition system?

I have used 5 ignition systems: stock points, MSD 6A (before they went digital), the Summit box (the stronger of the two, when they made two), the GM 4 pin, and an MSD 6A digital. I liked the performance of the MSD the best. The 4 pin is a step down in pep, noticeable. I do, however, keep a 4 pin in...
by F-250 Restorer
Sun Feb 03, 2019 12:27 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Holley Carb left turn stumble or stall!
Replies: 22
Views: 803

Re: Holley Carb left turn stumble or stall!

So, am I the only one that can't figure out what 'new set-up' means? I'm sorry, but I see where you said 'easy fix in two hours,' but does that mean that changed the position of the pump cam, got a new one, or acquired a new carb?
by F-250 Restorer
Thu Jan 31, 2019 11:08 am
Forum: 240-300 "Big Block" Six Performance
Topic: Priming Oil system/pump
Replies: 5
Views: 304

Priming Oil system/pump

To prime the oil system I simply insert the proper size hex shaft down through the dizzy inlet and into the oil pump, and turn it carefully with a drill, right?
by F-250 Restorer
Fri Jan 18, 2019 9:43 pm
Forum: 240-300 "Big Block" Six Performance
Topic: misaligned block cam journal
Replies: 33
Views: 1050

Re: misaligned block cam journal

I think maybe the block was still cold from the night, since it was morning. That is fascinating the with calipers. I didn't know that.
I was using Plastigauge.
by F-250 Restorer
Thu Jan 17, 2019 11:28 pm
Forum: 240-300 "Big Block" Six Performance
Topic: misaligned block cam journal
Replies: 33
Views: 1050

Re: misaligned block cam journal

I did not ck the cam because the tale involves one block and 2 new cams. Each cam had trouble entering the same journal in the block. **Guys, I have to mention something you may find interesting or already know. So, about 4 days ago when the temp was about 12* warmer here, I measured in the afternoo...
by F-250 Restorer
Thu Jan 17, 2019 9:18 pm
Forum: 240-300 "Big Block" Six Performance
Topic: misaligned block cam journal
Replies: 33
Views: 1050

Re: misaligned block cam journal

If those clearances bug you run a HV oil pump. One of the reasons for pulling my engine was that I had to use 20/50 oil to get 10psi, with a HV pump. I want to be able use normal oil w/o a hv pump, and maintain good oil psi. Btw, what do you guys think of my pan with clear on it? https://i.imgur.co...
by F-250 Restorer
Thu Jan 17, 2019 9:10 am
Forum: 240-300 "Big Block" Six Performance
Topic: misaligned block cam journal
Replies: 33
Views: 1050

Re: misaligned block cam journal

Interesting about using under-sized and standard size bearing, mixing them. The problem I have with the new block is that the book says iirc .0005--.0015 for the mains. I measure larger than that. But that is not a problem. I'll just swap the crank and bearings back to the first block where the tole...
by F-250 Restorer
Wed Jan 16, 2019 11:38 pm
Forum: 240-300 "Big Block" Six Performance
Topic: misaligned block cam journal
Replies: 33
Views: 1050

Re: misaligned block cam journal

Sealed power makes a set of undersize bearings, main bearings, for the three hundred. I found them on rock auto,.001 under the standard size. Well I guess the three hundred doesn't like me. Today I took the rotating assembly out of the first block with the misaligned cam. I guess what the other foru...
by F-250 Restorer
Wed Jan 16, 2019 10:24 am
Forum: 240-300 "Big Block" Six Performance
Topic: misaligned block cam journal
Replies: 33
Views: 1050

Re: misaligned block cam journal

pmuller9 wrote:Is the other block already 4.030" bore?

Yes.
by F-250 Restorer
Wed Jan 16, 2019 9:56 am
Forum: 240-300 "Big Block" Six Performance
Topic: misaligned block cam journal
Replies: 33
Views: 1050

Re: misaligned block cam journal

pmuller9 wrote:Is the main line for the crank straight?


It seems to be. The crank spins easily.
I guess the only way to be certain that the engine is good is to abandon this block and use the other one. OK. That is what I'll do today.
by F-250 Restorer
Tue Jan 15, 2019 11:58 pm
Forum: 240-300 "Big Block" Six Performance
Topic: misaligned block cam journal
Replies: 33
Views: 1050

Re: misaligned block cam journal

I pulled the cam out. Then I tried it in only three of the journals, and then in two. What I found was that it seemed to get difficult to turn as the cam entered the rear side of a couple of the journals. So I decided to just take some four hundred wet and dry sandpaper and sand that area on those j...
by F-250 Restorer
Mon Jan 14, 2019 11:07 am
Forum: 240-300 "Big Block" Six Performance
Topic: misaligned block cam journal
Replies: 33
Views: 1050

Re: misaligned block cam journal

Thanks for all the suggestions and feedback. The journal is misaligned. The cam hits on the bottom of the bearing. If I do anything to remove some of the bearing surface and allow the cam to spin freely, that means there is that much play/gap on the other side of the bearing. If I remove .001-.002&q...
by F-250 Restorer
Mon Jan 14, 2019 1:26 am
Forum: 240-300 "Big Block" Six Performance
Topic: misaligned block cam journal
Replies: 33
Views: 1050

Re: misaligned block cam journal

Thanks, I will ck all that. I saw that the cam was hitting the bottom of the bearing, so I chamfered the edge and sanded the bearing with 400 w/d sand paper, and then was able to slide the cam in. I'm guessing I should have sanded a bit more? until the cam is easy to turn? I have a 'spare block with...
by F-250 Restorer
Mon Jan 14, 2019 12:39 am
Forum: 240-300 "Big Block" Six Performance
Topic: misaligned block cam journal
Replies: 33
Views: 1050

Re: misaligned block cam journal

Good point. I will check, but I'm pretty sure the bearing is touching all the way around. It has done this with two sets of cam bearings, the second set purchased and installed by a machine shop so I could make sure I had it right.

Should a cam be stiff to turn?
by F-250 Restorer
Mon Jan 14, 2019 12:23 am
Forum: 240-300 "Big Block" Six Performance
Topic: misaligned block cam journal
Replies: 33
Views: 1050

Re: misaligned block cam journal

I have the earlier block, so the later bearing choice would not affect the insertion of my cam. The ID would be the same, right.

If the cam is tight as it is, am I making a mistake by proceeding with this block?
by F-250 Restorer
Sun Jan 13, 2019 11:59 pm
Forum: 240-300 "Big Block" Six Performance
Topic: misaligned block cam journal
Replies: 33
Views: 1050

misaligned block cam journal

Hey guys. The second cam journal in my block is slightly out of alignment. I had to chamfer the leading edge of the bearing to get the cam to slide in. Once in, I could feel it was tight/stiff to rotate. Installed all the way, with both hands holding the cam gear, it is stiff to rotate. Am I making ...
by F-250 Restorer
Sat Jan 12, 2019 12:30 pm
Forum: 240-300 "Big Block" Six Performance
Topic: I bought a used zf5-42 for my 1984 f-150
Replies: 21
Views: 770

Re: I bought a used zf5-42 for my 1984 f-150

I have a thread going on Ford Truck Enthusiasts forum, in the 73-79 section, about putting in a zf5, and all the small stuff that is needed. The thread is: C6 to zf5, and all the small stuff. Or, search posts by F250 Restorer. You might find it useful. The first thing you need to do is determine whe...
by F-250 Restorer
Tue Dec 25, 2018 11:56 am
Forum: 240-300 "Big Block" Six Performance
Topic: Enlarging the Combustion Chamber?
Replies: 8
Views: 550

Re: Enlarging the Combustion Chamber?

Maybe I just need a bit of info/clarification. With a 70cc chamber, I come up with a dcr of 7.39. Is that going to cause pinging/issues with the low grade fuel? Pmuller: I just wondering why it would be better to expand the chamber with a curved area, following the radius of the valves, rather than ...
by F-250 Restorer
Mon Dec 24, 2018 7:01 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Enlarging the Combustion Chamber?
Replies: 8
Views: 550

Re: Enlarging the Combustion Chamber?

Thanks for the note. I'll try to recheck. I have the cheap type, but it works. It took a few practice runs, but I figured it out. I do have to admit that yours certainly looks sharp. I wasn't aware that polishing takes off quite a bit of material.
by F-250 Restorer
Mon Dec 24, 2018 2:22 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Enlarging the Combustion Chamber?
Replies: 8
Views: 550

Re: Enlarging the Combustion Chamber?

If you have that image handy of the chamber that you did like that, can you please post it again?
by F-250 Restorer
Mon Dec 24, 2018 11:04 am
Forum: 240-300 "Big Block" Six Performance
Topic: Enlarging the Combustion Chamber?
Replies: 8
Views: 550

Enlarging the Combustion Chamber?

Having scribed the cylinder circle onto the head from the block, I found that I am already out to that circle on the spark plug side of the chamber. If I still need a couple of more cc's in the chamber, is it acceptable to expand the side opposite the spark plug side? I have seen where pmuller did i...
by F-250 Restorer
Wed Dec 19, 2018 3:26 pm
Forum: 240-300 "Big Block" Six Performance
Topic: chrome side lifter cover?
Replies: 6
Views: 450

Re: chrome side lifter cover?

I took my oem lifter cover to the local chrome shop and had them chrome it. I have had it on for more than 10 years, and it still looks good, no rust.

Image
by F-250 Restorer
Wed Dec 19, 2018 1:37 pm
Forum: 240-300 "Big Block" Six Performance
Topic: How to remove valve seals
Replies: 1
Views: 236

How to remove valve seals

The seals I have sit down inside the boss. How do I remove them? Head has about 40k miles on it. I thought I'd replace them while in there.

Thanks.
by F-250 Restorer
Sun Dec 09, 2018 11:32 am
Forum: 240-300 "Big Block" Six Performance
Topic: Does anyone have any experience with the Clifford 6-8 dual carb setup?
Replies: 10
Views: 687

Re: Does anyone have any experience with the Clifford 6-8 dual carb setup?

I find that very interesting that one of the posters has a set of headers that's been going for 15 years. I have been running my Hedman set for 10+ years. Of course the efi manifolds will last nearly forever, but restrict your flow. One tip I would toss in here is to use grade 8 studs and crimp nuts...
by F-250 Restorer
Fri Dec 07, 2018 1:17 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Rod Bearing width, etc.
Replies: 24
Views: 1241

Re: Rod Bearing width, etc.

Do I need to remove all those scratches and pits?
by F-250 Restorer
Thu Dec 06, 2018 7:50 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Rod Bearing width, etc.
Replies: 24
Views: 1241

Re: Rod Bearing width, etc.

Here you go.

Image

Image
by F-250 Restorer
Thu Dec 06, 2018 1:08 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Rod Bearing width, etc.
Replies: 24
Views: 1241

Re: Rod Bearing width, etc.

pmuller9 wrote:Would you post pictures of the polished piston tops.
Thanks

I will try to get a photo up today.
by F-250 Restorer
Wed Dec 05, 2018 1:11 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Rod Bearing width, etc.
Replies: 24
Views: 1241

Re: Rod Bearing width, etc.

Are the pistons are hung on rods? The pins need lube and rods will rust quick if left unprotected. I'd wait to clean them until it's time for assy. Then a few drops of oil on the pins on each side. IDK how your shop did it, but I use engine assy lube on the pins. Normally, any piston work is before...
by F-250 Restorer
Wed Dec 05, 2018 1:08 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Rod Bearing width, etc.
Replies: 24
Views: 1241

Re: Rod Bearing width, etc.

I mean that the ring groove must be deeper than the width of the rings so the rings aren't help out past the piston sides. I had a set of rings where the oil rings were too wide and wouldn't let the piston go into the cylinder even though the ring end gap was good. The metric rings and piston groov...
by F-250 Restorer
Tue Dec 04, 2018 11:12 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Rod Bearing width, etc.
Replies: 24
Views: 1241

Re: Rod Bearing width, etc.

Sorry, guys. I didn't see the last two replies until now. I'll check end gaps. Good to know. Pmuller, what do you mean the ring depths? Can you please explain. I will do what is needed. Oh, and I know this is a silly question, but today I polished the dish on each piston. Although I blew out each pi...
by F-250 Restorer
Thu Nov 29, 2018 11:07 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Rod Bearing width, etc.
Replies: 24
Views: 1241

Re: Rod Bearing width, etc.

I bought these rings, sealed power e-251k 30, and they are supposed to be non-filing. Does that mean I still have to check each set? Also, there was no bevel or mark on either the compression nor oil ring. Just to double check, does that mean install as you will?
by F-250 Restorer
Tue Nov 13, 2018 9:38 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Rod Bearing width, etc.
Replies: 24
Views: 1241

Re: Rod Bearing width, etc.

I need to bolt the crank in on a couple of bearings, and a couple of rods/pistons as well. I'm measuring the distance from top of piston to the block deck, so I can have the block milled down in order to achieve the compression ratio I need. How many pistons should I install? And should I do one on ...
by F-250 Restorer
Sun Nov 11, 2018 2:17 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Carb head combustion chamber question.
Replies: 79
Views: 3159

Re: Carb head combustion chamber question.

Did I miss something? Isn't the stock chamber 76cc? with a carbed head? I'm just curious how it got to 83cc. You scribed and opened up the chamber a bit...is that what happened? Are you going to mill the head to lower the cc of the chamber and thereby raise the compression ratio?
by F-250 Restorer
Fri Nov 09, 2018 2:36 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Rod Bearing width, etc.
Replies: 24
Views: 1241

Re: Rod Bearing width, etc.

I want to clean up the bores a bit. It was newly bored .030 over and honed. It has 1,000 miles on it, and has been sitting for almost ten years. I've kept the bore oiled, but have noticed some milky rust. I wanted to clean it up before putting the engine back together. Should I pick up a ball hone ...
by F-250 Restorer
Thu Nov 08, 2018 6:05 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Rod Bearing width, etc.
Replies: 24
Views: 1241

Re: Rod Bearing width, etc.

The pistons rock from side to side so it is best if the ring gaps are closer to the front or the back of the engine. otherwise 1/3 clocking or some other scheme will be fine considering the rings move around the piston over time. At least they start during break-in at a good location. Thanks again,...
by F-250 Restorer
Thu Nov 01, 2018 10:30 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Rod Bearing width, etc.
Replies: 24
Views: 1241

Re: Rod Bearing width, etc.

Excellent information. I will check the width. I looked on youtube to find how to install and clock rings, but I'm never sure of the info I get there. I will check my owner's manual too. Back when we used to clock them at 1/3, one ring gap being a third of the way around the circumference of the pis...
by F-250 Restorer
Thu Nov 01, 2018 12:16 am
Forum: 240-300 "Big Block" Six Performance
Topic: Rod Bearing width, etc.
Replies: 24
Views: 1241

Re: Rod Bearing width, etc.

Hello, Pmuller9: Nope, it's been on the shelf for quite a while, and I can only find a main bearing. Did you notice that hole in the rod cap in the photo? That worried me, but the shop said it would be okay, although there was only rod with that hole/defect. https://i.imgur.com/22EcQPG.jpg I saw tha...
by F-250 Restorer
Thu Nov 01, 2018 12:16 am
Forum: 240-300 "Big Block" Six Performance
Topic: Rod Bearing width, etc.
Replies: 24
Views: 1241

Re: Rod Bearing width, etc.

Hello, Pmuller9: Nope, it's been on the shelf for quite a while, and I can only find a main bearing. Did you notice that hole in the rod cap in the photo? That worried me, but the shop said it would be okay, although there was only rod with that hole/defect.
by F-250 Restorer
Wed Oct 31, 2018 7:45 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Rod Bearing width, etc.
Replies: 24
Views: 1241

Rod Bearing width, etc.

This build has been years in the making. This is the 3rd build for me. The first engine I paid someone to build it and it failed in 1000 miles. The second I paid a pro builder to get 10psi at idle with 20/50 oil and a high volume pump. I could just keep running this engine, having to use high octane...
by F-250 Restorer
Wed Oct 17, 2018 10:33 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Tubing diameter, etc.
Replies: 8
Views: 672

Re: Tubing diameter, etc.

I may go with the Y (2 x 2.5 into 3") right off the shorty collectors. That way I'd only be dealing with one pipe through the engine compartment. At the firewall I'll drop it down inside the frame, alongside the trans, and back to the one in/one out flowmaster 2.5, and exit under the right rear...
by F-250 Restorer
Tue Oct 16, 2018 9:18 pm
Forum: 240-300 "Big Block" Six Performance
Topic: 1986 F-150, c6, 2wd, offy, holley 600 - bad mpg
Replies: 17
Views: 1907

Re: 1986 F-150, c6, 2wd, offy, holley 600 - bad mpg

Surely it would be wise to classify mileage claims into rear end ratios. At 60 mph, the guy with the 3.00 rear is going to be spinning far fewer rpm than the guy with the 3.74 rear.
by F-250 Restorer
Tue Oct 16, 2018 7:04 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Tubing diameter, etc.
Replies: 8
Views: 672

Re: Tubing diameter, etc.

If you can do it yourself, you can create a much better y-pipe than a shop will do. For instance, this is the y-pipe I made vs the old one that a shop made. It's 2" pipe, and takes up more room than my 2.5" pipe. Mine also tucks up above the bronco crossmembers and none of the exhaust is ...
by F-250 Restorer
Mon Oct 15, 2018 10:53 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Tubing diameter, etc.
Replies: 8
Views: 672

Re: Tubing diameter, etc.

Have you considered using a dual in/single out muffler to act as the pressure wave termination box, rather than running a Y into a single in/single out muffler? It seems as if it might simplify things. You could "oversize" the muffler (pipe diameter wise) and use a stepped down (pipe diam...
by F-250 Restorer
Mon Oct 15, 2018 7:09 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Tubing diameter, etc.
Replies: 8
Views: 672

Tubing diameter, etc.

Well, I'm changing from the hedman to Clifford shorty headers. I want to simplify that side of my engine. I've been reading about exhaust systems, and was hoping that those who know more than I do might chime in here with some help. It had been my plan to go with the 2.5" about 3' off the colle...

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