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Search found 1360 matches

by CNC-Dude
Wed Nov 03, 2010 10:35 pm
Forum: 240-300 "Big Block" Six Performance
Topic: 60 over pistion choices?
Replies: 5
Views: 1231

Re: 60 over pistion choices?

The 300 blocks aren't known for being very thick castings, you might consider a smaller overbore than .060. No sense boring a block that much if .030 will give you a clean bore size.
by CNC-Dude
Mon Nov 01, 2010 6:07 pm
Forum: 240-300 "Big Block" Six Performance
Topic: !300 build compression ratio help!
Replies: 68
Views: 8135

Re: !300 build compression ratio help!

Correct, you never use the head gasket as the standard to open the chamber up too, always use the actual cylinder bore to avoid opening up the chamber too much as you have done. Now you have created an overhang that will cause unwanted shrouding more so than if you hadn't done it to start with.
by CNC-Dude
Thu Oct 28, 2010 6:16 pm
Forum: 240-300 "Big Block" Six Performance
Topic: !300 build compression ratio help!
Replies: 68
Views: 8135

Re: !300 build compression ratio help!

I think you need to leave the piston dish in a D-shape, this provides much needed and necessary quench for the engine, and altering this is going to drastically reduce performance and power output it would have otherwise. I think your best bet and most practical alternative is to change to an uncut ...
by CNC-Dude
Thu Oct 28, 2010 1:39 pm
Forum: 240-300 "Big Block" Six Performance
Topic: !300 build compression ratio help!
Replies: 68
Views: 8135

Re: !300 build compression ratio help!

Short of swapping to an uncut cylinder head to reduce your compression back to a more normal level. Even at 65cc for the head, you will still be slightly above 9.5-1. You could never enlarge the piston dish that much to get the same effect....I doubt, without compromising the piston strength. What c...
by CNC-Dude
Wed Oct 13, 2010 1:29 pm
Forum: Maverick Roundup
Topic: Still looking.....
Replies: 8
Views: 4408

Still looking.....

Still looking for a decent 2 dr. Maverick body in the Tri-state Tennessee, N. Alabama and N. Georgia area. A bare body hull is fine, rolling preferred. Can be gutted with no engine and tranny even. Leads appreciated, thanks.
by CNC-Dude
Wed Oct 13, 2010 1:23 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Timing Gear question(s)
Replies: 11
Views: 7711

Re: Timing Gear question(s)

I think you should always take advantage of the benefits of advancing the cam when doing a timing gear change, especially for the lower RPM gains to be had by doing so. Also, I just hate to see someone use those problematic phenolic gear sets, so good choice by using the Cloyes or better quality set...
by CNC-Dude
Wed Jun 30, 2010 5:56 pm
Forum: 240-300 "Big Block" Six Performance
Topic: 600 hp on a 300
Replies: 42
Views: 7619

Re: 600 hp on a 300

LSM in Michigan has made a Cheby inline 6 billet block for Rob Harrison's Comp car. Its over $10K for the block.
by CNC-Dude
Fri Jun 25, 2010 12:27 am
Forum: 240-300 "Big Block" Six Performance
Topic: Is this "unshrouding the valves?"
Replies: 9
Views: 1889

Re: Is this "unshrouding the valves?"

Probably not enough to write home about. The plug positioning in the chamber keeps you from removing too much meat around the plug boss, because it can compromise the strength of it when you tighten the plug. Just smoothing the sharp casting as shown in the pics helps remove hot spots in the chamber...
by CNC-Dude
Sat Jun 12, 2010 6:15 pm
Forum: 240-300 "Big Block" Six Performance
Topic: just picked up SVO 300 block & forged steel crank!!!!!!!!!
Replies: 7
Views: 1371

Re: just picked up SVO 300 block & forged steel crank!!!!!!!!!

Greg, how'd you let that stuff slip out from under you nose like that :oopsie:
by CNC-Dude
Wed Jun 02, 2010 12:06 am
Forum: 240-300 "Big Block" Six Performance
Topic: Is this "unshrouding the valves?"
Replies: 9
Views: 1889

Re: Is this "unshrouding the valves?"

No, unshrouding the valves is actually a process that involves machining or grinding additional clearance around the diameter of the valves, and removes material between the head gaskets bore diameter and the edge of the valve on the side of the chamber walls.
by CNC-Dude
Wed May 26, 2010 9:50 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Rocker Arm Stud Question
Replies: 12
Views: 3539

Re: Rocker Arm Stud Question

I wonder if the newer GM (90 and newer) Self-Aligning rockers would work...the 1.6 ratio roller tipped arent that bad in price... stamped roller tip in 1.6 ratio for 3/8 stud self aligning (No Guide Plates needed) http://www.summitracing.com/parts/CCA-1418-8/ full roller self -aligning http://www.s...
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: 3539

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: 7105

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: 7105

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: 1476

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: 1549

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: 715

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: 1458

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: 1458

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: 3053

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: 4848

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: 4848

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: 2104

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: 2130

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: 770

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: 527

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: 1629

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: 1365

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: 1629

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: 17558

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: 4385

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: 4385

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: 608

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: 2937

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: 2937

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: 2937

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: 2937

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: 726

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: 1758

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: 576

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: 1843

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: 712

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: 3706

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: 4787

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: 4787

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: 2866

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: 837

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: 6545

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: 2217

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: 2547

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....

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