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by CNC-Dude
Thu Sep 20, 2018 9:55 am
Forum: 144-250 "Small Block" Six Performance
Topic: 221 Stroked 200 - Myth or Reality
Replies: 21
Views: 353

Re: 221 Stroked 200 - Myth or Reality

You also have to examine the realistic benefits of doing this and not the theoretical. The costs to do such a small gain in cubes probably won't equal a cost proportional to HP or torque that you'd actually gain.
by CNC-Dude
Mon Sep 17, 2018 3:13 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Permanent 300 Six Cyl Head CFM solutions- A Work in Progress
Replies: 272
Views: 16602

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

It only applies to commercial type ads and not casual, buy/sell items like cleaning out your garage. Soliciting services or parts on a commercial level is only allowed by authorized forum vendors. Also, using the forums messaging system to contact members on behalf of unauthorized forum vendors to s...
by CNC-Dude
Mon Sep 17, 2018 2:14 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Permanent 300 Six Cyl Head CFM solutions- A Work in Progress
Replies: 272
Views: 16602

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

The point is, this entire thread violates forum rules and regulations. So you can't get back to it without continuing to violate the rules.
by CNC-Dude
Mon Sep 17, 2018 11:52 am
Forum: 240-300 "Big Block" Six Performance
Topic: Permanent 300 Six Cyl Head CFM solutions- A Work in Progress
Replies: 272
Views: 16602

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

I pointed out to you some months back that you had been violating forum rules by soliciting parts and services but you didn't seem to get it. Only the authorized vendors shown at the top of the ad banner on the Home Page have this privilege on this forum, and most all other forums as well.
by CNC-Dude
Fri Aug 17, 2018 10:13 am
Forum: 240-300 "Big Block" Six Performance
Topic: More Cam Gear Questions
Replies: 19
Views: 864

Re: More Cam Gear Questions

As pmuller9 had mentioned, if you'd actually degreed the cam you could have noted the open and closing events of the int/ex to verify what was actually accomplished. Its really a moot point now.
by CNC-Dude
Wed Aug 15, 2018 4:10 pm
Forum: 240-300 "Big Block" Six Performance
Topic: More Cam Gear Questions
Replies: 19
Views: 864

Re: More Cam Gear Questions

I think the 4° retard theory only applied to these engines back in the early 1970's smog emission days, its never been corroborated by anyone with actual Ford knowledge it applied to the later engines. You should have also verified with a degree wheel that you actually installed the 4° key in the ri...
by CNC-Dude
Sun Aug 12, 2018 4:53 pm
Forum: 240-300 "Big Block" Six Performance
Topic: More Cam Gear Questions
Replies: 19
Views: 864

Re: More Cam Gear Questions

Not sure where the "no longer available" or "discontinued" rumors got started, but I have seen them offered by too many places for almost 2 years when this rumor started for it to be true. That's why I steered you in that direction. Glad you got one, and helped quash the rumor mi...
by CNC-Dude
Fri Aug 10, 2018 6:02 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Pulling Cam & Crank Gears
Replies: 13
Views: 495

Re: Pulling Cam & Crank Gears

Is there a destructive method that will work? I'd hate to pull the cam as Jason823 suggested. Another problem is getting the new gear back on and fully seated against the wedding band spacer to ensure you don't have too much cam thrust, especially with the cam still in the block. Its also a challen...
by CNC-Dude
Wed Aug 08, 2018 2:10 pm
Forum: 144-250 "Small Block" Six Performance
Topic: Composite mpfi manifold
Replies: 9
Views: 523

Re: Composite mpfi manifold

Yes, volume of the plenum itself, not including the runners should be close to a 1:1 ratio cubic inch wise for a considerably hot performance engine. Naturally aspirated of course.
by CNC-Dude
Sat Aug 04, 2018 3:03 pm
Forum: 144-250 "Small Block" Six Performance
Topic: Composite mpfi manifold
Replies: 9
Views: 523

Re: Composite mpfi manifold

The CI data for the aluminum head shows and approx. gain of almost 50 HP by using injection over a carburetor, or 351 HP on a 250. So I think it is worth doing. A ported head will achieve an even higher gain.
by CNC-Dude
Thu Aug 02, 2018 9:13 pm
Forum: 144-250 "Small Block" Six Performance
Topic: Composite mpfi manifold
Replies: 9
Views: 523

Re: Composite mpfi manifold

Since the runners can be taken unbolted from the plenum, a thorough porting of the runners is a breeze and a custom plenum of a larger size can be fab'd to accomodate most any needs.
by CNC-Dude
Wed Aug 01, 2018 4:05 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Permanent 300 Six Cyl Head CFM solutions- A Work in Progress
Replies: 272
Views: 16602

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

Anything between 6.5-7:1 DCR is where you want to be with pumps gas. Since your likely going to run an iron head, i'd stay to the lower side of that range. You can also get a custom grind cam and/or play with the advance or retard, both of those will affect the DCR to tweak it or even add more dish ...
by CNC-Dude
Wed Aug 01, 2018 11:52 am
Forum: 240-300 "Big Block" Six Performance
Topic: Permanent 300 Six Cyl Head CFM solutions- A Work in Progress
Replies: 272
Views: 16602

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

I've already beefed up the top with arp studs and a 1024 felpro gasket, and I've heard many stories of the stock bottom end and holding up to years of 25psi 1/4 mile passes. However I imagine that's with a 8/8.5-1 static compression bottom end. This head would be closer to 9.5-1 with the stock bott...
by CNC-Dude
Wed Aug 01, 2018 9:59 am
Forum: 144-250 "Small Block" Six Performance
Topic: Composite mpfi manifold
Replies: 9
Views: 523

Re: Composite mpfi manifold

The plenum size and shape are the most critical part of this design, second being the runner length and shape. Keeping airspeed and equal flow to the ports is the critical part of the plenum shape, the size has to be large enough to feed the cylinders. So if the engine is 250 cubic inches, the plenu...
by CNC-Dude
Tue Jul 31, 2018 8:08 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Pulling Cam & Crank Gears
Replies: 13
Views: 495

Re: Pulling Cam & Crank Gears

Sometimes with a good amount of pressure applied the the puller, you can tap on the bolt with a hammer and it can shock it loose.
by CNC-Dude
Tue Jul 24, 2018 9:09 pm
Forum: 240-300 "Big Block" Six Performance
Topic: More Cam Gear Questions
Replies: 19
Views: 864

Re: More Cam Gear Questions

With close to a 20,000 feedback score, I doubt he's listing something he doesn't have. Many of these sellers buy several dozen items direct at a time from the manufacturer, and since these aren't really very high demand engines, its easily possible he just hasn't sold out of them yet.
by CNC-Dude
Sun Jul 15, 2018 9:38 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Permanent 300 Six Cyl Head CFM solutions- A Work in Progress
Replies: 272
Views: 16602

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

You will probably be somewhat disappointed, as I and other team members are, that we have only managed to raise a total of $360 to date. A total of 6 individual donations 1 of which is a neighbor and close friend the other 5 are Forum member contributions. Currently, I am about 6K in the tub as of ...
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: 282

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: 799

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: 799

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: 955

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: 591

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: 591

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: 955

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: 591

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: 591

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: 509

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: 892

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: 892

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: 892

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: 509

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: 412

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: 1731

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: 781

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: 781

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: 781

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: 781

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: 781

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: 1731

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: 272
Views: 16602

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: 1495

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: 1731

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: 1731

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: 621

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: 673

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: 272
Views: 16602

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: 272
Views: 16602

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.

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