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Search found 1349 matches

by CNC-Dude
Tue May 25, 2010 10:15 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Rocker Arm Stud Question
Replies: 12
Views: 3198

Re: Rocker Arm Stud Question

The channel that the pedestal sits in keeps the rockers from turning side to side, thus acting like a guide for keeping the pushrod from wandering from side to side. If you eliminate that and replace with a standard rocker stud and rocker, you will need a guide plate for the pushrods to correct that...
by CNC-Dude
Sat May 22, 2010 9:10 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Coast-to-Coast: Mega-MPG
Replies: 50
Views: 6570

Re: Coast-to-Coast: Mega-MPG

An alternator has a lot of drag on it once it has electrical power applied to it, and it remains there until the power is removed. You can spin it easily with your fingers with no belt on it, but once you energize it, you can barely turn it by hand even with no belt on it.
by CNC-Dude
Sat May 22, 2010 6:07 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Coast-to-Coast: Mega-MPG
Replies: 50
Views: 6570

Re: Coast-to-Coast: Mega-MPG

You can also relocate the alternator and remove it from the engine. I've seen a lot of drag cars make a mount off of the rear end and drive it from the rear yoke with a pulley. The alternator is likely the biggest draw on the engine, even over the water pump and all the other drive pulleys combined....
by CNC-Dude
Thu May 13, 2010 12:05 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Porting and polishing question
Replies: 9
Views: 1280

Re: Porting and polishing question

Since your goal is to retain a good amount of street driveability and not so much high performance, you would be best suited to concentrate your efforts in the bowl area and the short side radius. Just lightly blend the casting lines in the ports and don't remove much metal to keep the air/fuel spee...
by CNC-Dude
Thu Apr 22, 2010 1:51 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Cam timing
Replies: 9
Views: 1310

Re: Cam timing

The Cloyes 8-1014 will have three keyways in the crank gear to position it in +4°, 0° and -4° degrees of advance and retard. The OEM and stock replacements only have one keyway. It probably wouldn't hurt to put a degree wheel on the engine and plot your cam timing before you swap gears and then afte...
by CNC-Dude
Fri Apr 16, 2010 2:42 pm
Forum: 144-250 "Small Block" Six Performance
Topic: Oil Pump Gasket
Replies: 4
Views: 573

Re: Oil Pump Gasket

SBF's use a gasket between the block and oil pump. I 've seen some 300's come with them also. Its good to use assembly lube in the pumps to help prime on start-up, engine oil is a little too thin and drains back out if it sits a while, but is probably better than nothing.
by CNC-Dude
Thu Apr 15, 2010 2:10 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Main Bearing HELP
Replies: 10
Views: 1158

Re: Main Bearing HELP

Ok, that part of it sounds like wrong packaging. The journal widths are the same, its only the flange OD that was changed.
by CNC-Dude
Thu Apr 15, 2010 12:43 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Main Bearing HELP
Replies: 10
Views: 1158

Re: Main Bearing HELP

That is common on several other Ford engines as well, like the early FE engines. Ford changed the diameter of the flange on the thrust bearing for some reason, and they are specific for engines either before or after a certain manufacturing date. As you can see, both the thrust main cap and block ar...
by CNC-Dude
Wed Apr 14, 2010 11:15 pm
Forum: 240-300 "Big Block" Six Performance
Topic: New Race Camshaft
Replies: 26
Views: 2537

Re: New Race Camshaft

None of the cylinders you have paired together for this have their pistons at the same place in their respective cylinders at the same time to do this. You would have to make a custom crankshaft to do what you are planning to do for this to work. Just changing the firing order on the cam wont help y...
by CNC-Dude
Fri Apr 09, 2010 5:53 pm
Forum: Vintage Ford Sixes
Topic: Putting quench in a flattop piston?
Replies: 26
Views: 4363

Re: Putting quench in a flattop piston?

Jim, the quench, squish is not limited to location on the piston top. It can be any flat surface on the piston top other than the dome or a dish cavity. I agree that making a dish that mirror images the combustion chamber is the most beneficial design if you are going to have to have a dished piston...
by CNC-Dude
Fri Apr 09, 2010 2:14 am
Forum: Vintage Ford Sixes
Topic: Putting quench in a flattop piston?
Replies: 26
Views: 4363

Re: Putting quench in a flattop piston?

Divco man, you are getting your terminology confused. The quench or squish area on the piston is "only" the flat portion on the top most piston surface. The trough as you call it is not the same thing as the squish or quench. It is merely a dish cut into the to piston top to reduce the com...
by CNC-Dude
Fri Apr 02, 2010 5:24 pm
Forum: 144-250 "Small Block" Six Performance
Topic: My turn, offy weber - HELP!
Replies: 14
Views: 1773

Re: My turn, offy weber - HELP!

I have fooled with a lot of single Webers before, and usually a stumbling problem is from it being lean in the main fuel jet. SIXGUN on here has run multiple Webers a lot, maybe you can PM him directly for assistance on getting the in sync.
by CNC-Dude
Fri Mar 26, 2010 7:36 pm
Forum: Aussie Ford Sixes
Topic: Xflow to USA
Replies: 13
Views: 1815

Re: Xflow to USA

I've seen several guys on the Aussie site claim to be capable of shipping heads or entire engines here from Oz. You might have to explore that site and see if they seem legit and the real deal.
by CNC-Dude
Thu Mar 25, 2010 6:03 pm
Forum: Transmission & Drivetrain
Topic: Replacing 9 in gears....
Replies: 3
Views: 653

Re: Replacing 9 in gears....

Mutt, most chunk style rears like these are fairly simple for someone like yourself that is relatively mechanical. As you did point out, some specialty tools are required, but not overly expensive. Mark Williams and several other drivetrain companies offer videos for the do-it-yourselfer, and might ...
by CNC-Dude
Fri Mar 12, 2010 1:35 am
Forum: 144-250 "Small Block" Six Performance
Topic: What would you do with my scenario?
Replies: 1
Views: 459

Re: What would you do with my scenario?

You will need to start by taking all your stuff to a competent machine shop, and have all the pistons mic'd and the cylinder bores checked to see what clearance they have now, and whether they are still round and straight. Chances are good that you might be able to get by with just having the machin...
by CNC-Dude
Thu Feb 18, 2010 1:42 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Custom heads for the BB 6
Replies: 8
Views: 1438

Re: Custom heads for the BB 6

There on eBay all the time for $100 or less per set for the stock ones. I've seen shipping as little as $35 for the pair. I don't think you'll find them anywhere cheaper than that, then you don't even have to get dirty taking them off an engine :rolflmao: .
by CNC-Dude
Thu Feb 18, 2010 1:38 pm
Forum: 240-300 "Big Block" Six Performance
Topic: intake flange
Replies: 10
Views: 1159

Re: intake flange

along those same lines, is there anyone that sells the intake flanges by themselves? I've got an early Clifford 4502 that someone cut off the ends and added flanges for a different engine...I'll need 300 intake flanges to take it back. John/Fresno John, how thick do you want them. Also are you mean...
by CNC-Dude
Tue Feb 16, 2010 12:55 am
Forum: 240-300 "Big Block" Six Performance
Topic: Custom heads for the BB 6
Replies: 8
Views: 1438

Re: Custom heads for the BB 6

Well, that link you found pretty much mentions all the ways available to get you where you want to go. The stock head is capable of supporting a pretty good amount of HP in fully ported trim....how much you looking to make.
by CNC-Dude
Mon Feb 15, 2010 6:21 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Pedestal Roller Rockers
Replies: 98
Views: 16208

Re: Christmas list - Renaming to Pedestal Roller Rockers

If you started with a 4130 steel, that would be a better choice, and can be heat treated real easily and economically. Good product though, try the better steel and you will be set. :thumbup:
by CNC-Dude
Sun Feb 14, 2010 11:22 pm
Forum: Turbo, Supercharger, and Nitrous
Topic: Boost on a 300
Replies: 19
Views: 3937

Re: Boost on a 300

A regular composition head gasket might not be up to the challenge then, but a copper head gasket with an O-ringed block will easily take care of that and more if you need it too! I did a lot of NMCA nitrous Mustangs that had both high compression combined with 400+ horses of nitrous with no trouble...
by CNC-Dude
Sun Feb 14, 2010 5:47 pm
Forum: Turbo, Supercharger, and Nitrous
Topic: Boost on a 300
Replies: 19
Views: 3937

Re: Boost on a 300

You have to build any engine according to the output you expect to get out of it. You can put a $10 head gasket on an engine you plan to make 600 HP, for example. With higher outputs, you need to plan on O-ringing the block, and/or machine the head for reciever grooves on its deck surface. And maybe...
by CNC-Dude
Sat Feb 13, 2010 7:02 pm
Forum: 144-250 "Small Block" Six Performance
Topic: checking deck height
Replies: 3
Views: 502

Re: checking deck height

A dial indicator with a base that straddles the cylinder is the best method.
by CNC-Dude
Fri Feb 12, 2010 7:50 pm
Forum: 144-250 "Small Block" Six Performance
Topic: NEED HELP DEGREEING CAMSHAFT
Replies: 29
Views: 2391

Re: NEED HELP DEGREEING CAMSHAFT

ozconv wrote:From what I have read, I was planning to check the intake from 15btdc to 5 atdc and the exhaust from 5 btdc to 15 atdc.


Thats actually backwards, the intake is closest to the piston between 12- 18 degrees after TDC, and the exhaust is closest to the piston 12-18 degrees before TDC.
by CNC-Dude
Thu Feb 11, 2010 6:42 pm
Forum: 144-250 "Small Block" Six Performance
Topic: NEED HELP DEGREEING CAMSHAFT
Replies: 29
Views: 2391

Re: NEED HELP DEGREEING CAMSHAFT

When checking P to V, you might already know this, and some may not, but when the piston is at TDC in overlap, this is NOT when either the intake or exhaust valve is closest to the piston. Many people mistakenly assume this is where you check it when checking their P to V, and make a serious error i...
by CNC-Dude
Sun Feb 07, 2010 10:35 pm
Forum: 144-250 "Small Block" Six Performance
Topic: NEED HELP DEGREEING CAMSHAFT
Replies: 29
Views: 2391

Re: NEED HELP DEGREEING CAMSHAFT

To find TDC I am using a piston stop in #1. I go to 15 degrees before TDC rotating CW, screw in the stop till it hits the piston and then rotate ccw until I hit the stop again. If it isn't 15 degrees, say 10 degrees, I move the degree wheel until it reads 12.5 degrees and then rotate cw to make sur...
by CNC-Dude
Sun Feb 07, 2010 3:35 pm
Forum: 144-250 "Small Block" Six Performance
Topic: NEED HELP DEGREEING CAMSHAFT
Replies: 29
Views: 2391

Re: NEED HELP DEGREEING CAMSHAFT

JW, measuring the @.050" lifts will only give you the centerline of the lobe, if it is a symetrical lobe design. You need to measure and the graph the lobe closer to the nose to be as accurate as you can, like .050 either side of max lift, not off the heel of the cam. That would be like trying ...
by CNC-Dude
Sat Feb 06, 2010 1:09 am
Forum: 240-300 "Big Block" Six Performance
Topic: mild stroker combination
Replies: 3
Views: 617

Re: mild stroker combination

The stock head is hardly adequate to feed a 300 inch engine, even mildly ported, so you will run out of steam pretty quick regardless of what other precautions you take in the cam selection to offset that. By increasing the displacement, you are just increasing the engines need for even more air com...
by CNC-Dude
Wed Feb 03, 2010 10:24 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Stud Mount Rocker Arms Conversion Kit...What Now?
Replies: 12
Views: 1545

Re: Stud Mount Rocker Arms Conversion Kit...What Now?

The 429/460 engines use the same roller lifter set(same lifter bore spacing as the 300), maybe the valve spacing is close enough to use, even though they are canted. In the dark ages before anyone made guide plates for the Cheby 6's, we used to cut a set of BBC 7/16" guide plates apart and rewe...
by CNC-Dude
Fri Jan 29, 2010 4:26 pm
Forum: 144-250 "Small Block" Six Performance
Topic: Decking the block?
Replies: 2
Views: 483

Re: Decking the block?

How can you tell if a block has been decked without taking it to a machine shop? I was told the engine was rebuilt about 3 months prior to pulling it out of the car. It looks really good i am just trying to figure out compression before i send the head to the shop. Head was just just redone as well...
by CNC-Dude
Fri Jan 22, 2010 11:58 am
Forum: 240-300 "Big Block" Six Performance
Topic: Cam R&R
Replies: 18
Views: 1546

Re: Cam R&R

I put one in a friends 80 model F250 with a 300, its pretty straight forward. Like you mentioned, just remove the radiator and grille and anything else that might obstruct the R&R of it.
by CNC-Dude
Sat Jan 16, 2010 3:30 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Stock main bolts vs. ARP main studs
Replies: 5
Views: 611

Re: Stock main bolts vs. ARP main studs

On most any engine type, the stock main bolts are adequate for most any moderate HP levels within reason. Whether you choose to replace the rod bolts or main bolts with studs, this needs to be done at the time the engine is at the machine shop, because a stud torques and pulls on the block and caps ...
by CNC-Dude
Fri Jan 15, 2010 1:41 pm
Forum: Turbo, Supercharger, and Nitrous
Topic: not ANOTHER header flange thread... or is it?
Replies: 31
Views: 3166

Re: not ANOTHER header flange thread... or is it?

I can also take in suggestions to modify the flange on it, I just dont have a spare head lying around. That was the problem one of the other board members had when he made his header flange from a gasket. He discovered the gasket didn't match the ports in his head very good, after he had the flange...
by CNC-Dude
Thu Jan 14, 2010 8:04 pm
Forum: Fuel Injection - Mega Squirt
Topic: EDIS trigger wheel
Replies: 17
Views: 4332

Re: EDIS trigger wheel

I knew that, I was just wondering if he did,
by CNC-Dude
Thu Jan 14, 2010 6:09 pm
Forum: Fuel Injection - Mega Squirt
Topic: EDIS trigger wheel
Replies: 17
Views: 4332

Re: EDIS trigger wheel

wallaka wrote:
Bayrunner wrote:Why can't you use the dizzy as your triger?


The whole point is to get rid of the dizzy!

If you get rid of the dizzy...how you gonna' drive to oil pump.
by CNC-Dude
Thu Jan 14, 2010 1:09 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Clifford stainless steel valves
Replies: 14
Views: 2511

Re: Clifford stainless steel valves

SI is the way to go, they have a real good premium quality valve for a decent and fair price. They also have other components like springs, retainers and locks, valve guides and seat inserts as well. I agree with Strangeranger about Clifford, go somewhere else unless you absolutely have to go to them.
by CNC-Dude
Wed Jan 13, 2010 2:02 pm
Forum: 240-300 "Big Block" Six Performance
Topic: car headers?
Replies: 6
Views: 680

Re: car headers?

[/quote]

I'd like to get as much power as I can, I really like the long tubes. but wouldnt a custom header run over $600?[/quote]



If you want to play....you gotta' pay! Have you thought about an oil pan yet, or if you will have to make mods for it to work in the Mustang.
by CNC-Dude
Mon Jan 11, 2010 1:23 pm
Forum: 240-300 "Big Block" Six Performance
Topic: 300+ hp 300 builds.
Replies: 38
Views: 5849

Re: 300+ hp 300 builds.

Probably would be safer for the engine to use a direct port fogger style nozzle for each intake port. Getting even fuel and nitrous distribution thru a plate style system on the 2 bbl. intake might not be easy to do.
by CNC-Dude
Sun Jan 10, 2010 2:28 pm
Forum: 240-300 "Big Block" Six Performance
Topic: 300 zero deck pin height
Replies: 13
Views: 1950

Re: 300 zero deck pin height

You'll find that the blocks deck will be crooked front to back, and that even a theoretical comp. hgt. # will still result in having to cut the blocks deck or several piston tops to correct and adjust it. The best method, would be to do a cleanup deck on the block, and then setup a crank and (6) rod...
by CNC-Dude
Wed Jan 06, 2010 12:52 pm
Forum: 144-250 "Small Block" Six Performance
Topic: Roller Cam for the 200 inline 6?
Replies: 22
Views: 2021

Re: Roller Cam for the 200 inline 6?

CNC-Dude: Speaking of expensive (but certainly interesting) valve train parts, have you looked at the Schubeck Racing site and their "Roller-X" lifter? Pretty neat stuff! They have designed a new [mechanical] roller lifter that eliminates the traditional roller, axle, and needle bearings....
by CNC-Dude
Wed Jan 06, 2010 12:51 am
Forum: 144-250 "Small Block" Six Performance
Topic: Roller Cam for the 200 inline 6?
Replies: 22
Views: 2021

Re: Roller Cam for the 200 inline 6?

I thought I read somewhere that someone had come up with a bronze sleeve with a key way tab or ridge cast inside. The lifter bore in the block was honed out and then the bronze sleeve was pressed in and the roller lifter inserted and it rode on the key way inside the sleeve. Jesel offers them, but ...
by CNC-Dude
Wed Jan 06, 2010 12:48 am
Forum: 144-250 "Small Block" Six Performance
Topic: HEAD PORTING & DYNO TESTING
Replies: 25
Views: 2517

Re: HEAD PORTING & DYNO TESTING

Lazy JW wrote:
CNC-Dude wrote:......

Sure do wish I'd been born a little richer instead of so good lookin" :D :wink: :P :lol:
Joe

I know what you mean, good looks only help if your female :rolflmao:
by CNC-Dude
Tue Jan 05, 2010 2:13 pm
Forum: 144-250 "Small Block" Six Performance
Topic: HEAD PORTING & DYNO TESTING
Replies: 25
Views: 2517

Re: HEAD PORTING & DYNO TESTING

Yeah it was a bummer. We wanted to see how the Offy intake and Clifford intake compared in that RPM range. The Clifford yielded more peak HP than the Offy overall, but the Offy is best rated for the RPM below what we could test at, and thats what we wanted to see more than anything between the two,t...
by CNC-Dude
Tue Jan 05, 2010 12:05 pm
Forum: 144-250 "Small Block" Six Performance
Topic: HEAD PORTING & DYNO TESTING
Replies: 25
Views: 2517

Re: head porting

...... we saw absolutely no gain in HP whatsoever, not even 1 single HP of gain. It wasn't until we made changes in the camshaft deparment that we begin to see any benefits ..... Just curious: what happened at low rpm? And just how slow did you take readings? And what about torque at less-than-peak...
by CNC-Dude
Tue Jan 05, 2010 12:38 am
Forum: 144-250 "Small Block" Six Performance
Topic: HEAD PORTING & DYNO TESTING
Replies: 25
Views: 2517

Re: head porting

Mike, I know that you know this, so don't think I am telling you what or how to do your thing. But, when comparing the gains from head to head with different valve sizes for instance, make sure you keep the combustion chamber sizes the same, so that a rise in compression from one head to the next wo...
by CNC-Dude
Mon Jan 04, 2010 1:14 pm
Forum: 144-250 "Small Block" Six Performance
Topic: HEAD PORTING & DYNO TESTING
Replies: 25
Views: 2517

Re: head porting

That is what most head porters forget, VELOCITY. While dyno time is not cheap, it may answer a lot of questions. Can the stock log head be improved with the log still attached? If so how much? Is it worth the effort? Rbohm, you hit the nail on the head. Head porting alone rarely yields the same ben...
by CNC-Dude
Sat Jan 02, 2010 9:47 pm
Forum: 144-250 "Small Block" Six Performance
Topic: HEAD PORTING & DYNO TESTING
Replies: 25
Views: 2517

Re: head porting

David your right, we many times get lost in the mix as to what mod is actually contributing the most to the gains we see. We had a solid 2-1/2 weeks of parts swapping and testing, because there were several things we had an idea were actually "urban legends" instead of real facts, that we ...
by CNC-Dude
Sat Jan 02, 2010 1:45 pm
Forum: 144-250 "Small Block" Six Performance
Topic: HEAD PORTING & DYNO TESTING
Replies: 25
Views: 2517

Re: head porting

Stephen, you are absolutely right in your inquiry. But that is one of those myths that reared it head. For so many years, people have always assumed that just because you have a gain in one area, you will also see a gain somewhere else. That just isn't always true, as we showed in the dyno testing. ...
by CNC-Dude
Sat Jan 02, 2010 12:58 pm
Forum: 144-250 "Small Block" Six Performance
Topic: HEAD PORTING & DYNO TESTING
Replies: 25
Views: 2517

Re: head porting

Howdy Waldo: I'm in agreement with Joe. Know that the biggest return will be the work done within an inch either side of the valve seat- with the valve and valve seat most critical. The improvement will be avaiable and noticeable from idle to max rpm. A prioritized list of specifics to improve flow...
by CNC-Dude
Fri Jan 01, 2010 11:53 pm
Forum: 144-250 "Small Block" Six Performance
Topic: HEAD PORTING & DYNO TESTING
Replies: 25
Views: 2517

Re: head porting

Head porting with not much additional mods such as headers, larger camshaft, better ignition and normal hop-up goodies will be of little benefit by itself on an otherwise stock engine. Plus the log head is very limited as to how much you can even do on the intake ports, since they are concealed insi...
by CNC-Dude
Fri Jan 01, 2010 8:01 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Header flange drawing
Replies: 15
Views: 2740

Re: Header flange drawing

I have an AutoCAD of a flange I used on my stainless header project. The problem is that the one piece graphite intake/exhaust manifold gasket I used as a template was NOT correct and did not properly fit on my head, which I neglected to check (you can never assume that new parts are made properly!...

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