Click Here -> Please Consider Making a PayPal Contribution to the FordSix Forum!
2018 Contributors:
StarDiero75, curts56, DannyG, B RON CO, wsa111, Captainslow42, falconcritter
Econoline, THE FRENCHTOWN FLYER, 95FordFleetside, turbo6, Max_Effort, WorldChampGramp
cr_bobcat, C.S.Designs, pmuller9, gus91326, rwbrooks50, rocklord, drag-200stang, Big64my79Effie, CNC-Dude, gb500

2019 Contributors:
NJwpod, 1strodeo, mightynorseman, maxtrux, 6d7coupe, broncr, Phase3, 68Flareside240, bmbm40,
mustang6, WorldChampGramp, justintendo, BigBlue94, ags290, motorsickle1130, Rooster, ousooner919, ethanperry

Unknown->> M.Ketterer, T.Smith, J.Myers, P.McIntire - Please PM me (1966Mustang) and lemme know who you are!

Search found 92 matches

by Mdixon300f100
Thu Apr 18, 2019 8:19 pm
Forum: 240-300 "Big Block" Six Performance
Topic: What's wrong with this picture...
Replies: 9
Views: 258

Re: What's wrong with this picture...

You want a public reply?
by Mdixon300f100
Thu Apr 11, 2019 3:13 pm
Forum: 240-300 "Big Block" Six Performance
Topic: compression
Replies: 154
Views: 4748

Re: compression

I remember an episode of horsepower tv where they took a stock 350 and hammered it with nitrous in increasing amounts until the engine failed. It made I think it was around double the hp output before it had a ring land failure attributed to the rings butting together. Makes you wonder if it was act...
by Mdixon300f100
Sat Apr 06, 2019 11:57 am
Forum: 240-300 "Big Block" Six Performance
Topic: Yet another cam question
Replies: 10
Views: 250

Re: Yet another cam question

...Are there straight cut timing gears available? ... NO Pity. I have a couple of sets of straight cut prototype gears that a member made several years ago. They have an adjustable hub and are infinitely adjustable. It took me a lot of head scratching to figure how to use them but once I did I came...
by Mdixon300f100
Fri Apr 05, 2019 9:19 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Hedman vs EFI headers
Replies: 23
Views: 733

Re: Hedman vs EFI headers

The closer they are, the more thermally efficient it will be. It will spool faster, As the exhaust hasn’t had a chance to cool. Hotter gasses, more volume, more efficient. I’m sure any performance exhaust shop can fab a twin scroll setup, and that’s exactly the route I plan on taking.
by Mdixon300f100
Fri Apr 05, 2019 12:09 pm
Forum: Turbo, Supercharger, and Nitrous
Topic: Bolt-on supercharger 200 six
Replies: 15
Views: 1809

Re: Bolt-on supercharger 200 six

The msd 6al-2 programmable ignition control module is duraspark compatable (lockout of mechanical, vacuum advance necessary) and is fully tunable based on rpm and boost pressure with MAP sensor.
by Mdixon300f100
Wed Apr 03, 2019 9:43 am
Forum: 240-300 "Big Block" Six Performance
Topic: Fresh Rebuilt 240
Replies: 108
Views: 1798

Re: Fresh Rebuilt 240

Up here in New England wrapped steel headers don’t last. If it’s off the road during winter months probably not a big deal. Ceramic coating is probably the best for longevity, stainless would make all that unnessary beyond thermal efficiency, ie faster spool, and requires less heat shielding. Stainl...
by Mdixon300f100
Tue Mar 26, 2019 9:57 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Stuck valve locks
Replies: 53
Views: 903

Re: Stuck valve locks

:thumbup:

Thanks for all the advice from everyone. It’s not easy finding people willing to share this kind of knowledge, and I certainly appreciate it!
by Mdixon300f100
Tue Mar 26, 2019 8:26 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Stuck valve locks
Replies: 53
Views: 903

Re: Stuck valve locks

I mean I have a block, it’s .040 overbore, but I could use it to get started. Is the deck and head layout tolerance between castings enough to worry about? I can’t imagine factory tolerances were loose enough for that to be a problem, but I don’t know. Should I hold off? On further inspection I’m co...
by Mdixon300f100
Mon Mar 25, 2019 5:05 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Exhaust question...
Replies: 12
Views: 486

Re: Exhaust question...

I went efi manifolds, walker downpipe, 30 degree exit behind passenger door. Woke it up right to the 3800rpm wall from the carter carb. Got there a lot faster though :D
by Mdixon300f100
Mon Mar 25, 2019 11:15 am
Forum: 240-300 "Big Block" Six Performance
Topic: Stuck valve locks
Replies: 53
Views: 903

Re: Stuck valve locks

Honestly I’m getting ahead of myself, I need to build a short block before I can use steel guide plates. Im just trying to disassemble everything so I can get it to the machine shop. Actually the head should to be completed first so you know the finished chamber volume in order to know what the pis...
by Mdixon300f100
Mon Mar 25, 2019 10:39 am
Forum: 240-300 "Big Block" Six Performance
Topic: Stuck valve locks
Replies: 53
Views: 903

Re: Stuck valve locks

Yes, the rockers are moving from side to side because of the loose guides. The 5/16" threaded holes in the stud towers will need to be drilled and tapped to 7/16' x 14 to except ARP studs so you can use the steel adjustable pushrod guide Ok the part of the stud that the guide is on measures 9/...
by Mdixon300f100
Mon Mar 25, 2019 7:26 am
Forum: 240-300 "Big Block" Six Performance
Topic: Stuck valve locks
Replies: 53
Views: 903

Re: Stuck valve locks

Just to clarify for anyone, the VALVE STEM GUIDES are fine no issues, I was concerned about the PUSHROD GUIDES. I cannot move them, and idk if they have the right center to center distance.
by Mdixon300f100
Mon Mar 25, 2019 7:20 am
Forum: 240-300 "Big Block" Six Performance
Topic: Stuck valve locks
Replies: 53
Views: 903

Re: Stuck valve locks

They’re not worn out, I’m just not sure if their aligning the rockers properly since they’re in line with the rocker stud. It looked like the rocker roller was rotating over the valve tips. The contact marks on the valves were bow tie shaped
by Mdixon300f100
Mon Mar 25, 2019 4:50 am
Forum: 240-300 "Big Block" Six Performance
Topic: Stuck valve locks
Replies: 53
Views: 903

Re: Stuck valve locks

I may have answered the wrong question Were you looking for the pedestal to stud rocker kit? Crane cams has a variety of them No, I was speaking of the bronze insert replacements. However if it can easily be converted to adjustable steel guideplates I wouldn’t mind, I think it would require new stu...
by Mdixon300f100
Sun Mar 24, 2019 7:25 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Stuck valve locks
Replies: 53
Views: 903

Re: Stuck valve locks

Sorry it’s actually .5625 where it meets the guide
by Mdixon300f100
Sun Mar 24, 2019 7:23 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Stuck valve locks
Replies: 53
Views: 903

Re: Stuck valve locks

Anyone know where to find said kit? The only thing I’m seeing are steel guideplates... I may have answered the wrong question Were you looking for the pedestal to stud rocker kit? Crane cams has a variety of them No, I was speaking of the bronze insert replacements. However if it can easily be conv...
by Mdixon300f100
Sun Mar 24, 2019 7:15 pm
Forum: 240-300 "Big Block" Six Performance
Topic: compression
Replies: 154
Views: 4748

Re: compression

THE FRENCHTOWN FLYER wrote:I really like your methods. Did you use a rotary table to spot in the OD of the dish?

What do you use to profile a carbide cutter? I've tried to use a green stellite grinding wheel with limited success.


We use diamond wheels in our machine shop for cemented carbide.
by Mdixon300f100
Sun Mar 24, 2019 6:26 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Stuck valve locks
Replies: 53
Views: 903

Re: Stuck valve locks

Those would be Chevy valves. Doesn't look like there was much work done beyond cutting the seats and throat for larger valves. You will want to cut the spring perches down so you can use double springs. Those rocker studs with only a 5/16" screw in thread are scary. I would recommend replacing...
by Mdixon300f100
Sun Mar 24, 2019 5:58 pm
Forum: 240-300 "Big Block" Six Performance
Topic: how did ford break in engines on production line?
Replies: 4
Views: 235

Re: how did ford break in engines on production line?

To my understanding even now new vehicles are the responsibility of the buyer to ensure proper break-in. No upper rpm use for 500-5000 miles depending on spec. I’ve got a few friends who work for dealerships that have witnessed total destruction of brand new vehicles from unknowing buyers.
by Mdixon300f100
Sun Mar 24, 2019 5:38 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Stuck valve locks
Replies: 53
Views: 903

Re: Stuck valve locks

Anyone know where to find said kit? The only thing I’m seeing are steel guideplates...
by Mdixon300f100
Sun Mar 24, 2019 2:44 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Stuck valve locks
Replies: 53
Views: 903

Re: Stuck valve locks

So can the liners be replaced? Or does that mean the parent guide is stretched?
by Mdixon300f100
Sun Mar 24, 2019 1:45 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Stuck valve locks
Replies: 53
Views: 903

Re: Stuck valve locks

It has double springs, the inner spring is adout .500 shorter that the outer, and the head is stepped, as well as the retainer. I can’t get the rocker studs to spin, idk if their press in or not, and the guides won’t budge either. I’ll try and get the measurements later today, once I get the rest o...
by Mdixon300f100
Sun Mar 24, 2019 1:43 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Stuck valve locks
Replies: 53
Views: 903

Re: Stuck valve locks

And those are 3/8nf studs, not 5/16
by Mdixon300f100
Sun Mar 24, 2019 6:48 am
Forum: 240-300 "Big Block" Six Performance
Topic: Stuck valve locks
Replies: 53
Views: 903

Re: Stuck valve locks

It has double springs, the inner spring is adout .500 shorter that the outer, and the head is stepped, as well as the retainer. I can’t get the rocker studs to spin, idk if their press in or not, and the guides won’t budge either. I’ll try and get the measurements later today, once I get the rest of...
by Mdixon300f100
Sat Mar 23, 2019 7:55 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Stuck valve locks
Replies: 53
Views: 903

Re: Stuck valve locks

So I finally got to the valves. Unfortunately I can’t get them all at the moment, some are being stubborn and my 1yr old is asleep upstairs... anyway the valves and seat look good, valves measure 4.910 from face to tip, .341 stem diameter, the “porting” is kinda rough, but I should be able to fix so...
by Mdixon300f100
Thu Mar 21, 2019 6:59 am
Forum: 240-300 "Big Block" Six Performance
Topic: Stuck valve locks
Replies: 53
Views: 903

Re: Stuck valve locks

All these suggestions about directly hitting the retainers definitely causes some anxiety for me, but I guess this stuff isn’t as delicate as I thought. Thanks for the input everyone, I should be able to get the valves out tomorrow night. Im looking forward to getting some measurements and some ins...
by Mdixon300f100
Wed Mar 20, 2019 8:45 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Stuck valve locks
Replies: 53
Views: 903

Re: Stuck valve locks

All these suggestions about directly hitting the retainers definitely causes some anxiety for me, but I guess this stuff isn’t as delicate as I thought. Thanks for the input everyone, I should be able to get the valves out tomorrow night. Im looking forward to getting some measurements and some insp...
by Mdixon300f100
Tue Mar 19, 2019 9:08 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Stuck valve locks
Replies: 53
Views: 903

Re: Stuck valve locks

I’m thinking about welding a piece of 1” pipe onto a c clamp tomorrow, and using that to break the varnish that’s got them stuck. I did watch a video on the socket and hammer trick though. I didn’t think they would be stuck that tight, even though we use taper contacts on all the props and couplings...
by Mdixon300f100
Tue Mar 19, 2019 8:20 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Stuck valve locks
Replies: 53
Views: 903

Stuck valve locks

Does anyone have any tricks for removing stuck valve locks? I’m trying to disassemble my head for cleaning and inspection and I cannot get these valve locks to free up. With the valve spring compressed with a lever I made up I cant even push the valve out of the retainer with my free hand. Any ideas...
by Mdixon300f100
Sun Mar 17, 2019 7:11 am
Forum: 240-300 "Big Block" Six Performance
Topic: Turboing a stock 300, how to make it last?
Replies: 17
Views: 741

Re: Turboing a stock 300, how to make it last?

Agreed, but a fairly stock rebuild can get you where you want to go, is what I’m getting at.
by Mdixon300f100
Sat Mar 16, 2019 11:20 am
Forum: 240-300 "Big Block" Six Performance
Topic: Turboing a stock 300, how to make it last?
Replies: 17
Views: 741

Re: Turboing a stock 300, how to make it last?

The original plan was to turbo the stock motor without doing anything to it. With the information I have now, this would almost certainly lead to failure. It would also be a fun experiment to see what the stock motor can handle A healty stock engine can handle a lot of boost. There are numerous exa...
by Mdixon300f100
Sat Mar 16, 2019 8:40 am
Forum: 240-300 "Big Block" Six Performance
Topic: Turboing a stock 300, how to make it last?
Replies: 17
Views: 741

Re: Turboing a stock 300, how to make it last?

Use arp head studs and rod bolts. It’s cheap insurance
by Mdixon300f100
Fri Mar 15, 2019 7:56 am
Forum: 240-300 "Big Block" Six Performance
Topic: C5AE rods
Replies: 40
Views: 975

Re: C5AE rods

A 1.15 A/R turbine housing is on the large side for a 240 six as far as low rpm response. Good for making high rpm power. I wouldn't expect the engine to start pulling hard till 3000+ rpm. A 300 would have a much better low rpm response but you would not run it much past 5500 rpm. It depends on wha...
by Mdixon300f100
Thu Mar 14, 2019 8:16 am
Forum: 240-300 "Big Block" Six Performance
Topic: Permanent 300 Six Cyl Head CFM solutions- A Work in Progress
Replies: 433
Views: 41112

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

I'm sorry if I missed it but a short production run of a cut and welded LS based head after the Sr is done is still being planned, right? Does anyone have any real world reliability info (preferably Bonneville or something else where you're wide open for minutes at a time) on sectioned and weld...
by Mdixon300f100
Thu Mar 14, 2019 5:45 am
Forum: 240-300 "Big Block" Six Performance
Topic: C5AE rods
Replies: 40
Views: 975

Re: C5AE rods

A 60mm TP38 turbo would make good power with a 240 to 6500 rpm but there are a few things that would help get boost early. What A/R turbine housing does the turbocharger have? What transmission? It’s the stock 1.15ar turbine housing. It has a wicked wheel compressor blade. I’m going to have to upgr...
by Mdixon300f100
Tue Mar 12, 2019 3:34 pm
Forum: 240-300 "Big Block" Six Performance
Topic: C5AE rods
Replies: 40
Views: 975

Re: C5AE rods

So I’ve been running some numbers with the Wallace racing calculators, and found something interesting. The engine parameters calculator puts the redline rpm for the factory 240 rod length over 11k rpm. Is that what you meant by the only thing limiting you is the valve springs? Is that possible wit...
by Mdixon300f100
Tue Mar 12, 2019 2:13 pm
Forum: 240-300 "Big Block" Six Performance
Topic: C5AE rods
Replies: 40
Views: 975

Re: C5AE rods

So I’ve been running some numbers with the Wallace racing calculators, and found something interesting. The engine parameters calculator puts the redline rpm for the factory 240 rod length over 11k rpm. Is that what you meant by the only thing limiting you is the valve springs? Is that possible with...
by Mdixon300f100
Mon Mar 11, 2019 11:40 am
Forum: 240-300 "Big Block" Six Performance
Topic: C5AE rods
Replies: 40
Views: 975

Re: C5AE rods

From my understanding forged billet that’s then machined is not as strong as stamped forging with cleanup machining. Something about the way it structures the steel it the shape of the forging, rather than a round or flat bar stock that’s machined after the steel structure is formed. Regardless prob...
by Mdixon300f100
Mon Mar 11, 2019 6:29 am
Forum: 240-300 "Big Block" Six Performance
Topic: C5AE rods
Replies: 40
Views: 975

Re: C5AE rods

Would something like this work?

https://www.amazon.com/Speed-Mercury-Fo ... B00E1J4OCG

I’m a little concerned about the valve reliefs pictured, kinda negates any quench if one lands in the quench area. Maybe turning the .045 off the top eliminates that?
by Mdixon300f100
Mon Mar 11, 2019 5:41 am
Forum: 240-300 "Big Block" Six Performance
Topic: C5AE rods
Replies: 40
Views: 975

Re: C5AE rods

Does the combustion chamber shape allow for a 5cc dome piston? That could compensate for large chambers as long as it doesn’t cause interference. Sure. A 5cc dome would be about .035" high or about the thickness of the head gasket so it wouldn't actually go into the combustion chamber. Not sur...
by Mdixon300f100
Sun Mar 10, 2019 8:50 pm
Forum: 240-300 "Big Block" Six Performance
Topic: C5AE rods
Replies: 40
Views: 975

Re: C5AE rods

Does the combustion chamber shape allow for a 5cc dome piston? That could compensate for large chambers as long as it doesn’t cause interference.
by Mdixon300f100
Sun Mar 10, 2019 5:43 pm
Forum: 240-300 "Big Block" Six Performance
Topic: C5AE rods
Replies: 40
Views: 975

Re: C5AE rods

I’m planning on having it worked over by the local machinist after racing season starts around here. Right now he’s tied up with other customers, but was enthusiastic about it when I went to talk to him. They’re aluminum Harland sharp rockers. Can the Teflon guide insert be replaced? The inner sprin...
by Mdixon300f100
Sun Mar 10, 2019 4:39 pm
Forum: 240-300 "Big Block" Six Performance
Topic: C5AE rods
Replies: 40
Views: 975

Re: C5AE rods

Well, isn’t that great to hear :rolflmao: Maybe I’ll set my sights on the rest of the turbo plumbing at this years swap meets while I assemble a block. If this next engine is still near factory bore I may be ready to begin. Check out the thread “another turbo 300 in a f150” on the turbo page, I have...
by Mdixon300f100
Sun Mar 10, 2019 4:15 pm
Forum: 240-300 "Big Block" Six Performance
Topic: C5AE rods
Replies: 40
Views: 975

Re: C5AE rods

I was really surprised to find them in there. Someone had been in the engine before, the #1 piston looks different from the rest, and the head had a D shaped chamber. Cam measured .392 lift at the valve. Center sump pan. It had been in a storage container for 20yrs buried under years of junk. As you...
by Mdixon300f100
Sun Mar 10, 2019 4:10 pm
Forum: 240-300 "Big Block" Six Performance
Topic: C5AE rods
Replies: 40
Views: 975

Re: C5AE rods

I was thinking about utilizing the 240 crank honestly, it’s a little scratched up but maybe offset grind it for a few more cubes. I figure with those rods, the shorter stroke, and the head it could handle 7k. Maybe not, but food for thought. Fun to run while I build something else anyway. I’ve alway...
by Mdixon300f100
Sun Mar 10, 2019 3:45 pm
Forum: 240-300 "Big Block" Six Performance
Topic: C5AE rods
Replies: 40
Views: 975

C5AE rods

So in preparation for the 240 I’m picking up next weekend, I decided to strip down the 240 I picked up last year that’s been sitting on the stand in the basement. It appeared to be a stock engine, although I couldn’t read the casting # on the block. The guy said it was a “70s” era 300. The pistons a...
by Mdixon300f100
Sun Mar 10, 2019 1:10 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Industrial 300 forged cranks?
Replies: 34
Views: 977

Re: Industrial 300 forged cranks?

Moldex and Scat are about the same price as well. Until there is a cylinder head capable of allowing the 300 to make horsepower in a range that a billet or even a forged crank is necessary, there is really no concern as to whether a cast crank is more than adequate to fill the bill for any builds, ...
by Mdixon300f100
Sun Mar 10, 2019 8:45 am
Forum: 240-300 "Big Block" Six Performance
Topic: Industrial 300 forged cranks?
Replies: 34
Views: 977

Re: Industrial 300 forged cranks?

So far nearly everything for this build has been second hand. I’m doing my best to keep to that, the budget is tight. So 1500 or more for a one off forging is way out of my range.
by Mdixon300f100
Thu Mar 07, 2019 11:59 am
Forum: 240-300 "Big Block" Six Performance
Topic: Industrial 300 forged cranks?
Replies: 34
Views: 977

Re: Industrial 300 forged cranks?

so it's ....wait for it...tri fuel!! there's a guy in classifieds (might be me), has gotta Lotta what ur needing to get this down the road. if u live in the PNW. this seller, now on dilemmas horns, keep everything he owns cause the new heads are out, in the hope of someday being stationary long eno...
by Mdixon300f100
Thu Mar 07, 2019 11:50 am
Forum: 240-300 "Big Block" Six Performance
Topic: Industrial 300 forged cranks?
Replies: 34
Views: 977

Re: Industrial 300 forged cranks?

I’m going to pick up a supposedly original ‘68 240 in Providence next week. $100.