Search found 1249 matches

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: 204

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: 14
Views: 379

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: 14
Views: 379

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: 14
Views: 379

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: 204

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: 235

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: 1146

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: 547

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: 547

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: 547

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: 547

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: 547

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: 1146

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: 173
Views: 8143

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: 1067

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: 1146

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: 1146

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: 374

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: 448

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 3:05 pm
Forum: Buy, Sell, or Trade - Big Six
Topic: Clifford 240/300 6=8 valve cover - used
Replies: 5
Views: 252

Re: Clifford 240/300 6=8 valve cover - used

It wouldn't be close to that. But thanks anyway.
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: 173
Views: 8143

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: 173
Views: 8143

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
Sun Apr 15, 2018 10:15 am
Forum: Buy, Sell, or Trade - Big Six
Topic: 240/300 Clifford 6-8 blue valve cover - used
Replies: 4
Views: 248

Re: 240/300 Clifford 6-8 blue valve cover - used

Yes, there is a for sale section for the small and big 6's separately further down the forum lists. How much are you wanting for it?
by CNC-Dude
Fri Apr 13, 2018 2:08 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Intake help
Replies: 4
Views: 384

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: 1141

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: 1141

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: 774

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: 173
Views: 8143

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: 774

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: 774

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: 299

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: 173
Views: 8143

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: 366

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: 248

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: 248

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: 173
Views: 8143

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: 529

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: 1875

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: 1875

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: 1875

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: 1875

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: 1135

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...
by CNC-Dude
Sat Mar 17, 2018 10:55 am
Forum: 240-300 "Big Block" Six Performance
Topic: Testing the waters, potential for new cast aluminum valve cover.
Replies: 23
Views: 1438

Re: Testing the waters, potential for new cast aluminum valve cover.

Ted , I understand about the brand recognition. However, historically unbranded items like valve cover, side covers and even intakes have failed to be popular choices to hot rodders, because that was always the bragging rights for faster hot rods with statements like "After installing my Edelb...
by CNC-Dude
Fri Mar 16, 2018 4:45 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Timing sets
Replies: 48
Views: 1875

Re: Timing sets

Focus your efforts on more unique and useful things (the head). Any attention spent on products and services are useful and needful, even though these particular things may not be to you. These grassroots items are going to far outsell the cylinder head by a long shot. Many guys rebuilding these en...
by CNC-Dude
Thu Mar 15, 2018 9:33 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Timing sets
Replies: 48
Views: 1875

Re: Timing sets

You still align the gears dot to dot using the stock timing mark, the crank is actually rotated depending on which keyway slot you use and the crank position is moved by xxxx degrees relative to the gear position.
by CNC-Dude
Thu Mar 15, 2018 2:11 pm
Forum: 144-250 "Small Block" Six Performance
Topic: What H.P. gains from porting a modified 2v head?
Replies: 13
Views: 752

Re: What H.P. gains from porting a modified 2v head?

As for port matching and smoothing the casting flash adding HP. It's all part of the puzzle, and if you did that alone and no bowl work, then it likely wouldn't add any measurable increases. Bowl work is where the majority of all port work gets the most benefit and gains. Adding larger valves withou...
by CNC-Dude
Wed Mar 14, 2018 9:30 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Timing sets
Replies: 48
Views: 1875

Re: Timing sets

Using an offset key is not the most desirable method to advance/retard camshafts. You narrow the cross sectional strength of the key and it requires much less stress to shear it compared to a key that is full width. You may be ok for stock engines, but in performance apps where you have increased sp...
by CNC-Dude
Wed Mar 14, 2018 4:30 pm
Forum: 240-300 "Big Block" Six Performance
Topic: New Ford 240/300 valve cover....
Replies: 29
Views: 3937

Re: New Ford 240/300 valve cover....

I had found a small foundry willing to take on small runs of products. He can cast my intakes for me, and thought he could do the valve cover. But it turns out he discovered, the valve cover core boxes are over 100 pounds when full of sand, and the pour will require 2 people, and he is a one man sho...

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