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Search found 1349 matches

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: 2992

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: 5320

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: 5320

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: 1828

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: 5320

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: 5733

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...
by CNC-Dude
Sun Mar 11, 2018 2:06 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Deck the block or offset grind?
Replies: 4
Views: 791

Re: Deck the block or offset grind?

It's not uncommon for all the cylinders to have different deck heights in a seasoned, unmachined block deck. So I wouldn't sacrifice turning the crank excessively. Since your tearing the engine down completely, just do a cleanup cut on the blocks deck to get the deck where you want it. You can only ...
by CNC-Dude
Tue Feb 27, 2018 10:25 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Permanent 300 Six Cyl Head CFM solutions- A Work in Progress
Replies: 461
Views: 54509

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

Kudos on the ambition and desire. One piece of advice that would carry this to a much higher plateau faster and more economically than you can take it yourself. I would saw a single cylinder segment off of a cylinder head and send it to a truly top shelf cylinder head porter that is up to date on al...
by CNC-Dude
Tue Feb 27, 2018 9:57 am
Forum: 240-300 "Big Block" Six Performance
Topic: Permanent 300 Six Cyl Head CFM solutions- A Work in Progress
Replies: 461
Views: 54509

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

That's one reason why I haven't pushed ahead to create one based on my Duggan 12 Port Chevy head patterns. For 99% of any Ford hotrodder or racer, the stock cylinder head that is ported will provide all the power needed for what the rest of the components can handle. For the remaining 1% or less of ...
by CNC-Dude
Sun Feb 25, 2018 9:36 am
Forum: 240-300 "Big Block" Six Performance
Topic: Permanent 300 Six Cyl Head CFM solutions- A Work in Progress
Replies: 461
Views: 54509

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

Forum member SIX GUN has a production cylinder headed ported by the late Jerry Arnold head on his car in the video below that flows well beyond the 250 CFM range in the 260-270 CFM range. His car has run 10.90 quarter mile times so far. Using more modern and current head porting techniques they can ...
by CNC-Dude
Sat Feb 24, 2018 11:01 am
Forum: 144-250 "Small Block" Six Performance
Topic: Custom Forged Pistons
Replies: 19
Views: 2787

Re: Custom Forged Pistons

Don't assume that your block will make a .030" overbore. Have the machine shop clean and rough bore the block first before you order pistons. Some companies wont accept returns if you order the wrong size. The same goes for bearings as well, have the shop verify what size the journal's will mak...
by CNC-Dude
Tue Feb 13, 2018 7:36 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Early Ford 300 head (years / shape / cc)
Replies: 26
Views: 2719

Re: Early Ford 300 head (years / shape / cc)

Any piston in the bore size you are going to get is made from what is considered a small block based piston forging. You are just going to be using a BBC pin size. Piston manufacturers often create pistons for many different engine brands using a somewhat universal forging die. In the case of engine...
by CNC-Dude
Tue Feb 13, 2018 6:12 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Early Ford 300 head (years / shape / cc)
Replies: 26
Views: 2719

Re: Early Ford 300 head (years / shape / cc)

[b]pmuller9 & CNC-Dude [/b] --- If I take a set of BBC rods that have this big end off-set, Take care of the other side chamfer, Bush the small end for .990 floating pins and order a set of Forged custom pistons in the correct CH with floating pins to make 11.5 - 12.5 CR with 68cc heads. Will t...
by CNC-Dude
Tue Feb 13, 2018 6:01 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Early Ford 300 head (years / shape / cc)
Replies: 26
Views: 2719

Re: Early Ford 300 head (years / shape / cc)

arse_sidewards wrote:
old28racer wrote:Now the big question. How do I make the BBC 6.385" long rods with 2.100 journals fit the 300 crank rod journals that are 2.1228 - 2.1236'?


With a boring head and the things required to make proper use of it.

You make the crank fit the rods, not make the rods fit the crank.
by CNC-Dude
Tue Feb 13, 2018 9:53 am
Forum: 240-300 "Big Block" Six Performance
Topic: Early Ford 300 head (years / shape / cc)
Replies: 26
Views: 2719

Re: Early Ford 300 head (years / shape / cc)

V8 connecting rods are also offset in width in the bearing
end of the rods. This moves the connecting rod to one side or the other on the crank journal and makes it fit into the piston offcenter as well. Just make sure the small end of the rod doesn't bind or rub the pistons pins boss.
by CNC-Dude
Sat Feb 10, 2018 7:11 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Early Ford 300 head (years / shape / cc)
Replies: 26
Views: 2719

Re: Early Ford 300 head (years / shape / cc)

I don't think the 300 ever came with a "high compression" head, you must be thinking of the smaller chamber 240 head that has the kidney shaped chamber.
by CNC-Dude
Sat Feb 03, 2018 6:32 pm
Forum: 240-300 "Big Block" Six Performance
Topic: 300 triple carb ideas
Replies: 8
Views: 1680

Re: 300 triple carb ideas

The bore spacing on numerous 40MM-48MM DCOE's i've CMM'd is 3.550", and the IDF's in that same size range have the same spacing.
by CNC-Dude
Thu Feb 01, 2018 7:22 pm
Forum: 240-300 "Big Block" Six Performance
Topic: 240 rods the good ones???
Replies: 16
Views: 1945

Re: 240 rods the good ones???

Typically, I like to remove the rod bolts and polish the beams. Then shotpeen, cut the rod caps and deburr the parting line on the caps and rods. Then install new rod bolts, preferably ARP and torque to specs. Then balance and side clearance the rods, and then recondition as the last step.
by CNC-Dude
Tue Jan 30, 2018 5:53 pm
Forum: 240-300 "Big Block" Six Performance
Topic: 240 rods the good ones???
Replies: 16
Views: 1945

Re: 240 rods the good ones???

Now see if you can get 6 of them to be close enough weight-wise to make a set.
by CNC-Dude
Sat Jan 27, 2018 7:30 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Sandwich head. Or two piece head.
Replies: 40
Views: 6552

Re: Sandwich head. Or two piece head.

Lightening the crank can help also. Just picture these 6 cylinder cranks(Ford, Chevy and Chrysler) as being like a piece of spaghetti(unboiled). The more mass the cranks have ie. counterweights and rods/pistons, the more the crank flexes as it spins the higher it spins, helping to induce the dreaded...
by CNC-Dude
Sat Jan 27, 2018 9:44 am
Forum: 240-300 "Big Block" Six Performance
Topic: Sandwich head. Or two piece head.
Replies: 40
Views: 6552

Re: Sandwich head. Or two piece head.

Oh absolutely! The converter seems to act like another dampener to absorb shock and harmonics that can kill a stick car. Great point and observation. :thumbup: We were on the ragged edge for sure and so were others. If it wasn't the crank, it was kicking a rod and piston out of the side of the block...
by CNC-Dude
Sat Jan 27, 2018 9:02 am
Forum: 240-300 "Big Block" Six Performance
Topic: Sandwich head. Or two piece head.
Replies: 40
Views: 6552

Re: Sandwich head. Or two piece head.

Its no secret that forced induction engines can make more HP with less parts breakage than high HP naturally aspirated engines. FTF and Rich in past years posted in depth articles of Bruce's I/Gas Pinto, and it mentioned that while his engine did have forged cranks in them, they still only lasted an...
by CNC-Dude
Fri Jan 26, 2018 8:08 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Sandwich head. Or two piece head.
Replies: 40
Views: 6552

Re: Sandwich head. Or two piece head.

It was our Chevy 292 6 cylinder. They have a 4.120" stroke. We left the line between 10,500-11,200 RPM, but shifted at 7000 RPM. Our cast cranks only lasted (20) 1/4 mile passes, but have seen some of our Ford competitors with forged cranks only last as little as 15 passes with reportedly much ...
by CNC-Dude
Fri Jan 26, 2018 2:44 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Sandwich head. Or two piece head.
Replies: 40
Views: 6552

Re: Sandwich head. Or two piece head.

The journal overlap kills it when the stroke goes beyond 4" like ours was at these power levels N/A. Even billet can't withstand the harmonics in those scenarios in high RPM and very high compression, forced induction they would last longer because the stresses are much less and the RPM's are a...
by CNC-Dude
Fri Jan 26, 2018 11:57 am
Forum: 240-300 "Big Block" Six Performance
Topic: Sandwich head. Or two piece head.
Replies: 40
Views: 6552

Re: Sandwich head. Or two piece head.

We ran a few forged cranks in our H/MP car, but they broke with fewer passes than the cast cranks did so we always ran the cast cranks afterwards. Even Ford guys that ran forged cranks broke them with fewer passes than we did with cast cranks. So we never saw any benefit to getting custom cranks mad...
by CNC-Dude
Tue Jan 23, 2018 4:35 pm
Forum: 144-250 "Small Block" Six Performance
Topic: Milling off log head intake
Replies: 8
Views: 1334

Re: Milling off log head intake

Yes, there are quite a few threads here discussing it and showing it done. Just do a search and see what pops up.
by CNC-Dude
Fri Jan 19, 2018 11:55 am
Forum: 240-300 "Big Block" Six Performance
Topic: Sandwich head. Or two piece head.
Replies: 40
Views: 6552

Re: Sandwich head. Or two piece head.

Indy Cylinder Head used to furnace brazen our 6 cylinder heads when a combustion chamber would blow out of them. Don't know if they still do this or not but the did then.
by CNC-Dude
Sat Jan 13, 2018 11:51 pm
Forum: Aussie Ford Sixes
Topic: Importing a 4.0L Engine into the USA
Replies: 8
Views: 13103

Re: Importing a 4.0L Engine into the USA

That really falls outside the scope of their concern. Their agency only cares about is that the products coming or going into the country aren't on a prohibited list and that the duties and taxes are collected. How or what the products are used for isn't their concern.
by CNC-Dude
Sat Jan 13, 2018 7:29 pm
Forum: Aussie Ford Sixes
Topic: Importing a 4.0L Engine into the USA
Replies: 8
Views: 13103

Re: Importing a 4.0L Engine into the USA

Based on what was said, I would think so. Myself, I wouldn't hesitate to install one in an older hot rod like a Mustang or Maverick. If the car is already registered and titled, i've never had anyone ever ask me at the tag office if the engine is original or not, and most state don't do inspections...
by CNC-Dude
Sat Jan 13, 2018 11:42 am
Forum: Aussie Ford Sixes
Topic: Importing a 4.0L Engine into the USA
Replies: 8
Views: 13103

Re: Importing a 4.0L Engine into the USA

Based on what was said, I would think so. Myself, I wouldn't hesitate to install one in an older hot rod like a Mustang or Maverick. If the car is already registered and titled, i've never had anyone ever ask me at the tag office if the engine is original or not, and most state don't do inspections ...
by CNC-Dude
Sat Jan 13, 2018 11:39 am
Forum: 144-250 "Small Block" Six Performance
Topic: Weber DCOE?
Replies: 26
Views: 4103

Re: Weber DCOE?

I offer several DCOE side draft intakes for other inline engines I've designed and manufacture, and the DCOE carbs are very tuneable and reliable. I think you'll enjoy them.
by CNC-Dude
Wed Jan 10, 2018 9:54 am
Forum: 240-300 "Big Block" Six Performance
Topic: Testing the waters, potential for new cast aluminum valve cover.
Replies: 23
Views: 2992

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

Correct, there is one in the works as the ad banner at the top of the webpage here clearly announces. But this isn't an overnight process and takes much design engineering and R&D to perfect the product. Very interesting! I took the time to google Marshall, (is that your project?) I've noticed ...
by CNC-Dude
Mon Jan 08, 2018 6:01 pm
Forum: Aussie Ford Sixes
Topic: Xflow Head for US Swap - Any Interest
Replies: 10
Views: 2945

Re: Xflow Head for US Swap - Any Interest

Installing a OZ Crossflow head onto a USA non-Crossflow block requires extensive block modification. You may want to find the Crossflow head to non-Crossflow block threads here and read through them thoroughly before you decide to purchase one.
by CNC-Dude
Sun Jan 07, 2018 9:25 am
Forum: 240-300 "Big Block" Six Performance
Topic: Testing the waters, potential for new cast aluminum valve cover.
Replies: 23
Views: 2992

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

Correct, there is one in the works as the ad banner at the top of the webpage here clearly announces. But this isn't an overnight process and takes much design engineering and R&D to perfect the product.
by CNC-Dude
Fri Jan 05, 2018 4:20 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Testing the waters, potential for new cast aluminum valve cover.
Replies: 23
Views: 2992

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

Their group buys were made direct from Offenhauser on all occassions, so no chance of counterfeit products. I'll let the Slant 6 guys know that they may need to re-address their issues with them.
by CNC-Dude
Thu Jan 04, 2018 11:58 am
Forum: 240-300 "Big Block" Six Performance
Topic: Testing the waters, potential for new cast aluminum valve cover.
Replies: 23
Views: 2992

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

This is an ongoing issue they have known about for years. The slant 6 guys did a special group buy direct from Offenhauser on three or four separate occasions and had a high percentage of them warped so bad they weren't usable on each buy over a several year period . There was also a YouTube video o...
by CNC-Dude
Mon Jan 01, 2018 1:36 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Testing the waters, potential for new cast aluminum valve cover.
Replies: 23
Views: 2992

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

There are already vendors here on the forum creating products for these engines such as this. Just look at the ads at the top of the webpage for details. Also, Offenhauser doesn't make valve covers very well for in lines. There are dozens of threads on the Slant 6 forum with almost 100 complaints of...
by CNC-Dude
Sat Dec 30, 2017 4:38 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Is there any other Adjustable Gear Set other than the Cloyes 8-1014?
Replies: 11
Views: 2043

Re: Is there any other Adjustable Gear Set other than the Cloyes 8-1014?

I am not aware of any other brand that ever made an adjustable timing set for them. Jeg's, Summit, Rock Auto, Napa also sell them, so you may want to explore those as options to purchase one. You can also get the non-adjustable Cloyes set and have a machine shop broach the other keyways in the crank...
by CNC-Dude
Sat Dec 30, 2017 12:53 pm
Forum: Aussie Ford Sixes
Topic: Crossflow prices ?
Replies: 4
Views: 2063

Re: Crossflow prices ?

I have purchased several aluminum ones in the past for $100 completely assembled but needing a freshen up. They are very plentiful and cheap, shipping from Oz is usually around $300 so they are economical and a good upgrade for the price.
by CNC-Dude
Wed Dec 27, 2017 12:47 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Need a definitive answer on Cloyes adjustable timing set installation
Replies: 10
Views: 1550

Re: Need a definitive answer on Cloyes adjustable timing set installation

Correct, as wallen7 suggested! But to also know if where you end up is better than where you started, you should also verify where your cam timing events are with the fiber gear set before you make any changes. Otherwise, you are only making assumptions you have made improvements, and if so, by how ...
by CNC-Dude
Sun Dec 24, 2017 11:43 am
Forum: 240-300 "Big Block" Six Performance
Topic: Finding the right scale.
Replies: 17
Views: 1823

Re: Finding the right scale.

I found a speedpro h519p piston weight was 1051 grams. Man that seems heavy. They may be including the weight of the wrist pin in with that weight, since the pistons come with the wrist pins. But the crown is pretty thick and dense since its a dished piston and not a flat top style design. But you ...
by CNC-Dude
Sun Dec 24, 2017 11:31 am
Forum: 144-250 "Small Block" Six Performance
Topic: Gear drive for a 200
Replies: 18
Views: 2794

Re: Gear drive for a 200

You might begin with a justification of why this is a viable swap for your needs. Given the custom fit aspect of it, does your build warrant such an upgrade to a gear drive, and with all the extra costs involved to buy the gears set and possible fab costs to make them fit. Do you end up being better...
by CNC-Dude
Sat Dec 23, 2017 10:20 am
Forum: 144-250 "Small Block" Six Performance
Topic: Valve stem wiggles in the guide? Guide out of round. See pic please
Replies: 11
Views: 1476

Re: Valve stem wiggles in the guide? Guide out of round. See pic please

The valve stems can also have wear on them, keep in mind that when two parts rub together they both wear out. So this could end up being a multi-wear situation and the valve stems needs to be checked for wear and the valves may need to be replaced as well, so don't assume its just the guides.
by CNC-Dude
Fri Dec 22, 2017 11:24 am
Forum: 144-250 "Small Block" Six Performance
Topic: Gear drive for a 200
Replies: 18
Views: 2794

Re: Gear drive for a 200

Just keep in mind that creating a gear drive set-up for an engine that originally is chain driven introduces some challenges that you may not have considered yet, one is that it makes the cam reverse rotation, and a special cam will have to be ground to compensate. It also will make the distributor ...
by CNC-Dude
Fri Dec 22, 2017 10:38 am
Forum: 240-300 "Big Block" Six Performance
Topic: Push Rod Cover
Replies: 40
Views: 5423

Re: Push Rod Cover

So far so good. Believe it or not I have had them almost 3 years and wasn't fully aware of it. Occasionally, I would have some discomfort if I got too active or even ate too much supper and had the dinner bulge, but I had no idea I had hernia's. I did mention it to my doctor on my yearly checkup's b...
by CNC-Dude
Thu Dec 21, 2017 2:24 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Push Rod Cover
Replies: 40
Views: 5423

Re: Push Rod Cover

I was hoping to spend the two weeks I have off for Christmas finishing up some of these items, but I had to have surgery for a double hernia two days ago and the doctor is limiting my lifting to nothing heavier than a fork. I may try to sneak into the shop if my wife isn't watching and see what I ca...
by CNC-Dude
Tue Dec 19, 2017 10:42 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Push Rod Cover
Replies: 40
Views: 5423

Re: Push Rod Cover

I have a finned side cover already 3D modeled up and ready to machine the casting patterns for. The finish machined cover would easily come in under $100 while a polished one would be slightly higher. Several features that I have incorporated in mine are an oil fill tube and breather/vent. That way ...
by CNC-Dude
Mon Dec 18, 2017 7:54 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Push Rod Cover
Replies: 40
Views: 5423

Re: Push Rod Cover

I hope to have the Ford 240/300 valve cover patterns completed soon. Your side cover looks good and well thought out. :thumbup:
by CNC-Dude
Mon Dec 18, 2017 7:44 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Multiple carb Intake ?
Replies: 11
Views: 1475

Re: Multiple carb Intake ?

Weber's are primarily an IR style carb and need no plenum. Many have used the newer 300 EFI lower intake runners and fabbed a top and plenum for multi-carbs. FTF has done it and a few others have also. Seems to have worked out well for them.

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