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Search found 1349 matches

by CNC-Dude
Thu Jul 12, 2018 5:30 pm
Forum: 240-300 "Big Block" Six Performance
Topic: What cams are you guys running on a stock EFI Head
Replies: 3
Views: 673

Re: What cams are you guys running on a stock EFI Head

You wont be able to use the fiber cam gear either if you use any cam larger than stock. Any added valve spring pressure will make them shred teeth off in a hurry, so you'll also need to factor in a steel timing gear set or you'll have problems. You'll also have to change valve springs more than like...
by CNC-Dude
Mon Jul 09, 2018 5:54 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Quick valvetrain question.
Replies: 16
Views: 1766

Re: Quick valvetrain question.

Nothing that requires any accuracy. The other seal options are "positive" type which requires to tops of the guide to be trimmed down to compensate for the height so you don't have any clearance issues with the underside of the retainers, and a piloted forming cutter to cut the of of the g...
by CNC-Dude
Mon Jul 09, 2018 4:11 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Quick valvetrain question.
Replies: 16
Views: 1766

Re: Quick valvetrain question.

You're pretty much limited to stock-ish umbrella style seals unless the tops of the guides are machined.
by CNC-Dude
Wed Jul 04, 2018 4:20 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Permanent Flow Fix IDEAS Welcomed
Replies: 15
Views: 1765

Re: Permanent Flow Fix IDEAS Welcomed

You definitely are shortchanged when surfing the web on your phone instead of a desktop. Phones just don't have the capability to display most webpages in their entirety, so you many times don't know what you are truly missing when you use them. Most of my products and other advertisers here are cus...
by CNC-Dude
Wed Jul 04, 2018 9:18 am
Forum: 144-250 "Small Block" Six Performance
Topic: Yella Terra Planning
Replies: 19
Views: 1451

Re: Yella Terra Planning

Since they came with the head, that's no problem. Many people get caught up in the hype or bigger rocker ratios without truly understanding what their purpose is or isn't.
by CNC-Dude
Tue Jul 03, 2018 11:51 pm
Forum: 144-250 "Small Block" Six Performance
Topic: Yella Terra Planning
Replies: 19
Views: 1451

Re: Yella Terra Planning

While higher ratio rockers can be beneficial, they are so far down the list of upgrades to do and are usually done after you have exhausted all other efforts to extract the last few ounces of horsepower from an engine. That money they cost can be spent on much more beneficial items that can yield 20...
by CNC-Dude
Tue Jul 03, 2018 8:30 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Permanent Flow Fix IDEAS Welcomed
Replies: 15
Views: 1765

Re: Permanent Flow Fix IDEAS Welcomed

A valve cover spacer is already offered by one of this forums authorized vendor advertisers for this website shown at the top of the revolving ad banner on the Home Page.
by CNC-Dude
Mon Jul 02, 2018 10:58 pm
Forum: 144-250 "Small Block" Six Performance
Topic: Yella Terra Planning
Replies: 19
Views: 1451

Re: Yella Terra Planning

As long as you're planning further upgrades in the future you'll be fine with upgrading the rockers. But like Bill suggested, ditch the stock camshaft. What are you planning to use for an intake and carb?
by CNC-Dude
Mon Jul 02, 2018 7:22 pm
Forum: 144-250 "Small Block" Six Performance
Topic: Yella Terra Planning
Replies: 19
Views: 1451

Re: Yella Terra Planning

What exactly are you expecting to gain by using 1.65 rockers if you're still using the stock camshaft? You likely won't get any gains by doing this, especially if the rest of the engine is also stock.
by CNC-Dude
Sat Jun 16, 2018 11:04 am
Forum: 144-250 "Small Block" Six Performance
Topic: Minimum piston/head clearance (quench)
Replies: 8
Views: 1036

Re: Minimum piston/head clearance (quench)

Thanks, I like to try and give people a good foundation so they can achieve good results in their projects. Hope it's been helpful to others as well.
by CNC-Dude
Fri Jun 15, 2018 9:22 pm
Forum: 144-250 "Small Block" Six Performance
Topic: Maximum Compression Ratio-Aluminum Head
Replies: 16
Views: 1813

Re: Maximum Compression Ratio-Aluminum Head

It's titled "Minimum piston/head clearance-quench"
by CNC-Dude
Fri Jun 15, 2018 8:28 pm
Forum: 144-250 "Small Block" Six Performance
Topic: Maximum Compression Ratio-Aluminum Head
Replies: 16
Views: 1813

Re: Maximum Compression Ratio-Aluminum Head

Read the post I'm referring to, it will explain a lot.
by CNC-Dude
Fri Jun 15, 2018 12:41 pm
Forum: 144-250 "Small Block" Six Performance
Topic: Maximum Compression Ratio-Aluminum Head
Replies: 16
Views: 1813

Re: Maximum Compression Ratio-Aluminum Head

Yes, it refers to the block only. Check out the recent post in his other thread regarding this subject.
by CNC-Dude
Fri Jun 15, 2018 11:26 am
Forum: 144-250 "Small Block" Six Performance
Topic: Minimum piston/head clearance (quench)
Replies: 8
Views: 1036

Re: Minimum piston/head clearance (quench)

I'd like to get as thin of a head gasket as possible. Would .032 to 0.40 be doable without catastrophic results? Thanks for any info! -Sean Many people don't have a true understanding of how to correctly check the pistons true deck height to be safe, or where to correctly check them. A true zero de...
by CNC-Dude
Mon May 28, 2018 3:34 pm
Forum: 144-250 "Small Block" Six Performance
Topic: 144 turbo candidate?
Replies: 6
Views: 859

Re: 144 turbo candidate?

Even though it's just a 4 main crank, the journal overlap makes this short stroke diamond in the ruff a better candidate. I doubt you'll snap the crank, even with high boost and abuse. The slant 6 guys have to deal with 4 main engines, because that's the only way those engines were made, and the 225...
by CNC-Dude
Fri May 11, 2018 2:11 pm
Forum: 144-250 "Small Block" Six Performance
Topic: Question on building up new to me short block
Replies: 45
Views: 3553

Re: Question on building up new to me short block

The plus or minus tolerance for the dowel locations is only +/- .001". More precise than you can achieve with a hand drill. If you vary more than that the bellhousing won't fit and/or the centerline for the pilot hole in the back of the crank will be out of center. You can only be so careful us...
by CNC-Dude
Wed May 09, 2018 2:07 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Forged crank
Replies: 15
Views: 1598

Re: Forged crank

Yes, there are formulas out there to pinpoint more accurately the different harmonic frequencies based on the stroke, but yes, lightening the crank and staying away from the rpms where these harmonic frequencies occur will help. I have removed between 11 and 12 pounds from the Chevy 292 cast cranks,...
by CNC-Dude
Wed May 09, 2018 5:24 am
Forum: 240-300 "Big Block" Six Performance
Topic: Forged crank
Replies: 15
Views: 1598

Re: Forged crank

The launches are brutal on them, but the cranks worst enemy is operating the engine at or near the RPM's where harmonic frequencies are at their worse. It really has nothing to do with HP or torque. But if you will break a cast crank with your combo, you'll also break a forged crank as well with the...
by CNC-Dude
Tue May 08, 2018 9:52 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Forged crank
Replies: 15
Views: 1598

Re: Forged crank

No aftermarket cranks for the Ford 240/300 as a stocking item, only custom, but many will be glad to make billet ones for you. Many people underestimate the usefulness of a cast crank. There are dozens of guys in Brasil making close to 1000 HP with 30 lbs of boost using the stock Chevy 292 cast cran...
by CNC-Dude
Tue May 08, 2018 3:59 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Forged crank
Replies: 15
Views: 1598

Re: Forged crank

Wesman07 wrote:What is “culling”?

Culling- Be so badly damaged they don't try to repair it. But I have seen them weld up all the rod journals and main journal and even the thrust faces and rear main seal, all on the same crank. So you can just imagine what shape one is that they cull.
by CNC-Dude
Tue May 08, 2018 11:50 am
Forum: 240-300 "Big Block" Six Performance
Topic: Forged crank
Replies: 15
Views: 1598

Re: Forged crank

They probably come from crank rebuilders as cores that they weld back to standard and regrind. They repair burned up mains and rod journal's along with burned up thrusts. They don't cull anything as long as its in one piece. So buyer beware.
by CNC-Dude
Thu May 03, 2018 9:56 am
Forum: 144-250 "Small Block" Six Performance
Topic: Question on building up new to me short block
Replies: 45
Views: 3553

Re: Question on building up new to me short block

Moly rings do require a finer finish hone than cast rings do, so you could experience ring seal issues if the finish is to rough.
by CNC-Dude
Tue Apr 24, 2018 9:55 am
Forum: 240-300 "Big Block" Six Performance
Topic: Permanent 300 Six Cyl Head CFM solutions- A Work in Progress
Replies: 453
Views: 53172

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

Many new products are in the works for the Ford 240/300 engines from me. Some have never been created before, so exciting times lay ahead. I can't say at this time what some of them are because experience has shown that trolls scour a lot of forums seeking to undermine the efforts of those creating ...
by CNC-Dude
Mon Apr 23, 2018 11:53 am
Forum: 240-300 "Big Block" Six Performance
Topic: What operating rpm can a 300ci. hold safely?
Replies: 25
Views: 2945

Re: What operating rpm can a 300ci. hold safely?

ARP has head bolts and studs for the 429/460 engines which are 9/16. The deck should be able handle this upgrade. The 1/2" bolt conversion for the Ford 6 is an easy conversion and can handle anything you could ever build forced induction or N/A. So a 9/16 upgrade would last forever.
by CNC-Dude
Sun Apr 22, 2018 5:43 pm
Forum: 144-250 "Small Block" Six Performance
Topic: Question on building up new to me short block
Replies: 45
Views: 3553

Re: Question on building up new to me short block

Yes, just pop the caps apart and take a look unless you see evidence to lead you to go further. As for the debris, I had a similar situation some years ago where a friend had assembled a Pontiac 400 shortblock and used STP to coat the internals once he assembled the crank and rod/pistons. He then ba...
by CNC-Dude
Sun Apr 22, 2018 5:13 pm
Forum: 144-250 "Small Block" Six Performance
Topic: Question on building up new to me short block
Replies: 45
Views: 3553

Re: Question on building up new to me short block

Although it seems to be a nice score, never assume it is ready to run. It was pulled out for a reason. Could have been wrecked, or could have eaten a cam lobe or two. Take a few more steps and pull the rod and main caps and inspect the bearings, take the oil pump apart also and inspect and re-lube t...
by CNC-Dude
Fri Apr 20, 2018 4:13 pm
Forum: Aluminum Cylinder Head
Topic: Video & Article(Mustang360): April 2018 Vintage Inline Performance Aluminum Cylinder Head
Replies: 10
Views: 1839

Re: Video & Article(Mustang360): April 2018 Vintage Inline Performance Aluminum Cylinder Head

I think I remember reading some time back that Mike made the aluminum head share the same bolt pattern and intake port spacing as the 2V Aussie head so it would have crossover possibilities for more intake selection without him having to actually make them all himself. Keep in mind that the patterns...
by CNC-Dude
Thu Apr 19, 2018 9:52 am
Forum: 240-300 "Big Block" Six Performance
Topic: Distributor timing adjustments
Replies: 12
Views: 1306

Re: Distributor timing adjustments

On that old of an engine, I would confirm true TDC with your timing mark on the balancer and timing cover to make sure they haven't been changed or mismatched in the past.
by CNC-Dude
Mon Apr 16, 2018 2:13 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Permanent 300 Six Cyl Head CFM solutions- A Work in Progress
Replies: 453
Views: 53172

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

Bruce, the person that shared it with me did so with the understanding on my part that I would only use it for my personal use to develop a racing/performance head I am developing. And not share or disclose how or where I obtained them. They felt that there may be repercussions on them if it was dis...
by CNC-Dude
Mon Apr 16, 2018 9:52 am
Forum: 240-300 "Big Block" Six Performance
Topic: Permanent 300 Six Cyl Head CFM solutions- A Work in Progress
Replies: 453
Views: 53172

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

I have a cylinder head blueprint, but I was asked by the person that provided them not to let them be used for public consumption. There may be archives in the dungeon of Ford's black op sites that have them, that's probably where these I have originated.
by CNC-Dude
Fri Apr 13, 2018 2:08 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Intake help
Replies: 4
Views: 841

Re: Intake help

Clifford used to make an intake for the IDF's many, many years ago. You can use the factory EFI lower, but you'll have to adapt the port spacing to the throttle bore spacing.You'll have to keep the design IR because Webers don't like plenum style intakes.
by CNC-Dude
Wed Apr 11, 2018 11:35 am
Forum: 144-250 "Small Block" Six Performance
Topic: Crank Scraper ????
Replies: 14
Views: 2080

Re: Crank Scraper ????

Most windage trays aren't that wide and bolt to the main caps. I guess it depends on who designed or makes them.
by CNC-Dude
Wed Apr 11, 2018 9:54 am
Forum: 144-250 "Small Block" Six Performance
Topic: Crank Scraper ????
Replies: 14
Views: 2080

Re: Crank Scraper ????

They also require special or longer main bolts or studs made for windage trays, and this often introduces an expense component to a rebuild that people often overlook and don't expect until they are trying to figure out how to install it.
by CNC-Dude
Sun Apr 08, 2018 2:35 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Forged Crank NIB
Replies: 20
Views: 1998

Re: Forged Crank NIB

Not trying to dog any company specifically, just trying to make aware of what can and does happen and to know to never assume a crank is ready to drop in. Check, check and re-check again.....
by CNC-Dude
Sun Apr 08, 2018 1:22 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Permanent 300 Six Cyl Head CFM solutions- A Work in Progress
Replies: 453
Views: 53172

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

When Crane bankrupted and closed 8 or 10 years ago, I needed some flat tappet cores and all the cam companies were out of them. I contacted one of those companies in Michigan that supplies them to all the A-Z cam grinders. They said they don't deal with small quantity buyers and sell in lots of 100 ...
by CNC-Dude
Thu Apr 05, 2018 2:57 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Forged Crank NIB
Replies: 20
Views: 1998

Re: Forged Crank NIB

Nothing wrong with Scat, i've used a lot of their cranks and rods myself. But I have also sent many of them back(cranks not rods) to them because their quality control isn't always consistent, having the issues I mentioned. So with these issues coming from a larger supplier like Scat, who knows what...
by CNC-Dude
Wed Apr 04, 2018 4:56 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Forged Crank NIB
Replies: 20
Views: 1998

Re: Forged Crank NIB

Several red flags going off here that should make someone put the brakes on real quickly. The first one is you're buying a brand new crank for just $95. No doubt it is from China, which in itself isn't a tragedy, but it's much less than even a Scat or Eagle crank. Also, it probably doesn't have a ve...
by CNC-Dude
Wed Apr 04, 2018 4:40 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Removing harmonic balancer
Replies: 5
Views: 907

Re: Removing harmonic balancer

I used to make a flywheel stop for Ford's that bolted down low on the bellhousing where the inspection plate is to simplify balancer bolt removal. There may be others on the market if you did a search.
by CNC-Dude
Sun Apr 01, 2018 9:16 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Permanent 300 Six Cyl Head CFM solutions- A Work in Progress
Replies: 453
Views: 53172

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

The potential HP the block can handle is much lower in N/A form than with forced induction. Historically, the Chevy in lines as well as the Ford's become grenades when you get above 500 HP N/A with both block and crank failures. So trying to push a build near or beyond that isn't going to yield sati...
by CNC-Dude
Sat Mar 31, 2018 6:11 pm
Forum: 144-250 "Small Block" Six Performance
Topic: Figuring out pushrod length
Replies: 10
Views: 1003

Re: Figuring out pushrod length

It really doesn't work that way. More important is the rocker contact path on the tip of the valve. An adjustable pushrod length checker is desirable for this. I made up a batch of them some time ago but am out of them or i'd send you one to use. Here is how the cam companies recommend you do it. ht...
by CNC-Dude
Sat Mar 31, 2018 12:26 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Private label vs name brand.
Replies: 3
Views: 719

Re: Private label vs name brand.

They still have to eat it if it goes bad. So I wouldn't think it would always be lesser quality. Some of the these companies also own smaller companies they may sub the work out to that have cheaper labor rates(overseas plants), but it still needs to pass their same QC requirements I would think.
by CNC-Dude
Sat Mar 31, 2018 12:14 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Private label vs name brand.
Replies: 3
Views: 719

Re: Private label vs name brand.

Many private label brands are also made by the same top shelf manufacturers. That way they control the whole market by offering the lesser priced products as well as the higher end ones. As you mentioned, the quality on the private label parts are just as good and still has the same "lifetime w...
by CNC-Dude
Wed Mar 28, 2018 10:10 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Permanent 300 Six Cyl Head CFM solutions- A Work in Progress
Replies: 453
Views: 53172

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

I'm sure price will be a large factor. Inline guys in general are well known for not wanting to spend any money, mostly because they just don't have it to spend.
by CNC-Dude
Fri Mar 23, 2018 3:08 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Wrist pins
Replies: 10
Views: 1224

Re: Wrist pins

There are somewhat special support fixtures to keep from exploding the pistons when you press them apart. If the pistons aren't supported on the pin bosses correctly, even just one ton of pressure can break them. But typically only a few tons is enough to break the pins loose from the rods.
by CNC-Dude
Thu Mar 22, 2018 2:37 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Timing sets
Replies: 48
Views: 5222

Re: Timing sets

Since my background and Bruce's is so similar I keep forgetting and comparing my comments to that level of performance and not the milder street/strip levels of most of the enthusiasts here.
by CNC-Dude
Thu Mar 22, 2018 2:10 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Timing sets
Replies: 48
Views: 5222

Re: Timing sets

There has never been a problem with using the .750" long offset key with the 300 six cam gear. The key has a thickness of .188" and that is only reduced to .153" at the shear point with the offset. Secondly the cam gear has a very tight press fit to the cam snout and will absorb most...
by CNC-Dude
Thu Mar 22, 2018 10:00 am
Forum: 240-300 "Big Block" Six Performance
Topic: Timing sets
Replies: 48
Views: 5222

Re: Timing sets

I'm curious: is there an advantage to replacing the gears if all that is needed is a key? When you pull your timing cover and find that the cam timing gear is fiber, you will want to replace it with a metal gear set. The offset key only fits the cam gear which is a very tight press fit. Once a mult...
by CNC-Dude
Thu Mar 22, 2018 9:57 am
Forum: 240-300 "Big Block" Six Performance
Topic: Timing sets
Replies: 48
Views: 5222

Re: Timing sets

There are still a lot of the desirable Cloyes multi keyway timing sets sitting in parts distributors inventory such as Jegs and Summit, and even eBay. So there is plenty of supply to provide enough to fulfill the few builds that are actually being done for quite a while.
by CNC-Dude
Sun Mar 18, 2018 9:01 am
Forum: 240-300 "Big Block" Six Performance
Topic: Exhaust port question.
Replies: 18
Views: 2530

Re: Exhaust port question.

Those depressions where there before you started and it ran tens of thousands of miles already without any visible issues. By blending and grinding the port like you have, you've actually improved it from its original condition. So I wouldn't be too concerned with it. If you are, just do as brandonc...

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