Search found 1285 matches

by CNC-Dude
Sat Dec 01, 2018 8:42 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Aftermarket 300 Rod opinions?
Replies: 24
Views: 489

Re: Aftermarket 300 Rod opinions?

The 240/300 is already available with .912" wrist pins the same as the SBF's, so the aftermarket piston companies also already have them available in that size as well. But a near stock drop-in rod that fits the stock crank journal sizes would be the most common so off the shelf parts could be ...
by CNC-Dude
Tue Nov 27, 2018 4:58 pm
Forum: 240-300 "Big Block" Six Performance
Topic: CONNECTING ROD FAILURES AT OIL SPIT HOLE - HAD ONE???
Replies: 30
Views: 362

Re: CONNECTING ROD FAILURES AT OIL SPIT HOLE - HAD ONE???

We had a customer break one at the spit hole in a dirt track engine. He was just hot lapping and didn't even make 2 full laps, and was just keeping the engine below about 5000 RPM. He was using them in a 351W engine and built a budget long rod combo with JE pistons that only weighed about 400g. So i...
by CNC-Dude
Tue Nov 20, 2018 11:08 am
Forum: Fuel Injection - Mega Squirt
Topic: Home made 36-1 trigger wheel
Replies: 16
Views: 784

Re: Home made 36-1 trigger wheel

Its my understanding from the wheels i've made before that they need to be made from iron or steel because the sensors create a magnetic field and aluminum isn't magnetic. Also the teeth need to be sharp at the bottom instead or having a radius because it affects the pulse signal.
by CNC-Dude
Mon Nov 19, 2018 9:42 am
Forum: 144-250 "Small Block" Six Performance
Topic: Aluminium heads other than vintage inlines
Replies: 7
Views: 437

Re: Aluminium heads other than vintage inlines

Go with a proven design and quality product like the Classic Inline head Matt offers. By the time you pay duties and customs plus shipping from Argentina, and the communication barrier, you could pay more and still have a poorer quality product. Then you have to deal with sending it back on your nic...
by CNC-Dude
Thu Nov 15, 2018 11:49 am
Forum: 144-250 "Small Block" Six Performance
Topic: What’s a fair price for a stock C9 250 head (about 100k miles)
Replies: 11
Views: 313

Re: What’s a fair price for a stock C9 250 head (about 100k miles)

Most shops won't buy any blocks, heads or cranks until they are degreased and magnafluxed first, then they will give you the standard $40 or $50 going rate. Most people will not buy one that isn't magnafluxed first. There is just too high of a risk of them being cracked or unusable.
by CNC-Dude
Wed Oct 31, 2018 9:19 pm
Forum: 144-250 "Small Block" Six Performance
Topic: Headers with turbo adapter
Replies: 8
Views: 693

Re: Headers with turbo adapter

Econoline wrote:CNC-Dude, do you have the small six flanges?


No, but I do have a CAD file for them if anyone is interested. I didn't create it, someone else here did so I can't verify the accuracy so you'll need to keep that in mind. I don't have a head or I could do it.
by CNC-Dude
Tue Oct 30, 2018 2:10 pm
Forum: 144-250 "Small Block" Six Performance
Topic: Headers with turbo adapter
Replies: 8
Views: 693

Re: Headers with turbo adapter

Do you want a T3 or T4 flange? I have 3D models for both if you want to make your own or you can just buy them.
by CNC-Dude
Wed Oct 10, 2018 5:35 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Molnar BBC connecting rods in 300
Replies: 28
Views: 1050

Re: Molnar BBC connecting rods in 300

Molnar makes a set of Chevy 292 6 cylinder H-Beam rods that are near the same specs as your rods Greg, they are only $620 for a set of 6 for the Chevy engine, so they may not be that terrible to have them make you a set for the Ford 6. They are correctly double chamfered on each side and not offset ...
by CNC-Dude
Mon Oct 08, 2018 2:46 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Molnar BBC connecting rods in 300
Replies: 28
Views: 1050

Re: Molnar BBC connecting rods in 300

The rods will actually hit the cam barrel in some engines, and some cam companies even have their cores made with notches in them for factory rod clearance, but still hit the cam with beefier H-beam rods. So it good to check all possibilities and don't assume they won't hit somewhere.
by CNC-Dude
Mon Oct 08, 2018 10:42 am
Forum: 240-300 "Big Block" Six Performance
Topic: Molnar BBC connecting rods in 300
Replies: 28
Views: 1050

Re: Molnar BBC connecting rods in 300

It's not a big deal or that involved. I wrote a book discussing this exact process of installing big block V8 rods into another vintage inline engine, and can be done either in a mill or lathe, whichever you or the shop you decide to use has available to them. Another issue to point out is the possi...
by CNC-Dude
Mon Oct 08, 2018 9:15 am
Forum: 240-300 "Big Block" Six Performance
Topic: Molnar BBC connecting rods in 300
Replies: 28
Views: 1050

Re: Molnar BBC connecting rods in 300

No, it's offset from the relationship of the width of the B/E relative to the centerline of the width of the S/E. You can just machine one side of the S/E so it doesn't rub the inside of the piston pin boss. Also, V rods only have adequate chamfering on only one side of the B/E while inline rods hav...
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: 22
Views: 1056

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: 334
Views: 24843

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: 334
Views: 24843

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: 334
Views: 24843

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: 1510

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: 1510

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: 1510

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: 625

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: 665

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: 665

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: 665

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: 334
Views: 24843

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: 334
Views: 24843

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: 665

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: 625

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: 1510

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: 334
Views: 24843

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: 387

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: 956

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: 956

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: 1133

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: 811

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: 811

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: 1133

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: 811

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: 811

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: 597

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: 1075

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: 1075

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: 1075

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: 597

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: 513

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: 2007

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: 955

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: 955

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: 955

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...

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