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- เผยแพร่เมื่อ 5 ก.ย. 2024
- Watch as John Edwards @ Costa Mesa R&D Automotive Machine Shop machines a flathead Ford V-8 for sleeves, then resurfaces the block, and then cuts a power slot into the deck for enhanced air flow and performance. (949) 631-6376 Don't forget to 'Click' and SUBSCRIBE!
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i wish there was someone like this local to me not many know much about flatheads any more
no technical question,i just want to thank you for the video,very interesting,i did enjoy it very much.
Many years ago Hotrod magazine ran a number of complete articles with pictures on how to relieve the valve intake and exhaust paths. Electric or air driven drills and dry honing were demonstrated. I can imagine how many relieving projects ruined the blocks. It is an exacting process that most hot rodders of the day, me included , didn't have the skill or the patience to complete.
People in the comments hating lol, obviously the dude knows what he is doing. Coolant is rarely used for blocks, the initial startup with the pistons(in bores) prefers the slightly soft cylinder walls and harden them within a few seconds so any heat into the walls is beneficial. Obviously where perfect smoothness is required(ie. mains and cam journals) the lube will give a better finish and the tooling used benefits from it. No use wasting coolant when you don't need it. Wet and dry sand paper vs mill bastard
NICE WORK
With cast iron, there is a lot of carbon p-resent and it acts like a lubricant.
the tool flexes. Metal no matter how solid it seems it always flexible at microscopic scales. So if the cutter is passed again and again is still continues to cut bigger with no adjustment until all tension in the tool flex is released. I have a machinist that I use for my car mods and I seen him bore massive hinges for a press fit pins of about 3" diameter. He did about 3 passes without adjusting the cutting tip and it kept boring bigger til he got the size he needed. Its interesting stuff.
The reason for the "scrap" in the bore can be caused from a few things. One reason could be from tool pressure. Tool pressure is caused from any flex in the machine or the tool and is completely normal and unavoidable. Another reason can be if the gib is even slightly out of adjustment (assuming this machine has a gib) the sight shift when it retracts can cause scrap the bore on the way out. Also very normal and acceptable. To prevent this (if needed) you simply stop the spindle and then retract the boring head. In this case it was not needed because it will not effect the sleeve and the bore in the sleeve will be honed after and be removed. As a real machinist, I would be very happy to have them do work for me.
springpressure of the tool when you machine the tool will be pressed away from the part so when you reverse the mill or on a lathe you will get those very paint grooves which john say are about 0.002" deep
Lower RPM and higher feed rates reduce chatter when milling on smaller machines with less rigidity and when using extended tooling. Also spring cuts are pretty normal which is why it is important when machining multiple parts to repeat the same number and depth of cuts to keep consistency in sizes. Even in bigger cnc milling machines we use in my workshop it is normal to move the boring bar off center by 0.2mm before lifting the bar out of the hole to prevent scoring
The honing process will take out any machine marks including those on the boring heads retraction.
A real machinist who just happens to work on engines Great stuff. Tell me.. Do you do a lot of blocks on a mill .. Sure works nice..
We use centrifugully cast iron sleeves, not steel when we resleeve engines.
I like that beefy rotary table. What other methods are you using to keep a rigid set up?
Very professional work. Those power slots should really help the airflow. I wonder why the engineers at Ford never thought of this idea during the production run of these engines?
Actually they did.
Yes and they weren’t building race cars. Plus the added cost of that relieving back in the day didn’t add to profit.
Most flatheads that are resleeved actually run cooler.
I heard a friend of mine (that was a 100% Ford guy) said the flat head model T, 4 cylinder engine was the most produced engine that was ever manufactured. He said they still are being used around the World in stuff like saw mills, water pumps etc and may parts are still available. I don't actually know .
At the time yes, the Model at was the most produced automotive engine.
As of right now I believe that title goes to the Small Block Chevrolet, which is still in production after over 100 million units
The groove is only .002" deep and is removed during the honing process, we like to leave .010" to hone to finish size, so its not big deal. Good question.
I don't have mechanics here and we don't do oil changes and brake jobs either. This is a machine shop, not a repair shop.
When I see people use a machine like this to do something as large as an engine block it makes me wonder. I'd like to see the test results of the measurements taken on the machine work from a CMM and compared to blueprint dimensions.
It occurs to me that setting the block on the bell housing end and doing the machining on a Horizontal Machining center (instead of a flimsy "C clamp" milling machine) would be more accurate......although it may end up more accurate than Ford did them....back then
Good job as always.
in some engines a torque plate is not needed if you have aluminum block its needed but on iron not so much maybe on very high performance but not really especially not on a flathead or iron block in general they dont change shape enough when heads are torqued
I do believe the block is cast iron and I've always been told not to use lubricant with cast iron as it can create an abrasive slurry that greatly shortens the life of your tools. I cannot say what fiatnutz exact reasonings are though.
How much temperature variance results from cutting pathway re-leafs between cylinder and valve seats. I'm not sure if this was your project or if your doing this for someone else. Do you get to reap the benefits of seeing these projects to their running stage?
Which piston did you use after the power slot, and what was the compression??
Thanks!!
When you start with a bare block what surfaces do you use for a reference to set it up for the different machining steps etc.
I'd also like to know.
Main bearing bores on a mandrill and locating tabs on the engine.
@@51cotton Long story short.... a diesel engine shop I worked at used to send the bad top deck blocks to a machine shop. They always used the oil pan rail as reference to resurface the deck of a block , they got away with it for years and years . But it is not such a good idea.
@@davecee4459 Thats right you cant be sure of a square deck to center line of mains that way , Besides if you blueprint the block you would use the mains to start with not the pan rail but what ever I wouldn't take my engine to them thats for sure . Sorry.
It all has something to do with cutter flex and metal expansion I believe.
what a great machine. does everything. must have cost a pretty penny. very nice job. do you bore the sleeves after you install them? i have a sleeve i need to install in a 215 buick. it seems rough inside and its more than a hone would smooth out. keep up the great work i like all your videos.
cool video as always never heard of a power slot before tho
Ford calls them " Relief " or a " Relieved block " nice work ..
Hey there. I have a question about a flathead . So had it rebuilt put in high pressure oil pump and spin on style filter. Ran oil line from rear of engine up to the filter block then out of filter block to front timing cover. So here is my problem, it leaked oil from my distributor between the housing and the cap. Cannot figure out why it is leaking distributor is all new as well. Please help me figure this out if you can.
Its just tool deflection. He is taking quite a big cuts with tool that has single point cutting action and is relatively long. If you really want good surface in these conditions you have to take smaller cuts and use spring passes.
In this case, yes.
What kind of mill is that? It looks like a bridgeport, but seems to have a 50 taper spindle and no knee......
Why was the cutter still scraping the cylinder wall on the upward cycle and leaving huge score marks which are clearly evident. It's like the bearing shaft holding the cutter head is loose. Once the cutting pass has been accomplished there should be zero contact as the cutter is raised out of the block.
with steel sleeves installed, how is the life of the rings compared to stock cast iron considering cast iron contains a lot of lubricating carbon?
is it practical to re-sleeve a flathead simply for the strength of a newer more modern sleeve?
No, only if your out to the max on bore size or heavy pitting, cracks in the bore or galling that would require over bore.
little dry ice and that sleeve could very well go in a tad easier.
Would it make sense to cool the sleeves for installation? The big hammer kind of bothers me...
I was just wondering if the sleeves are efficient at transferring heat.
When boring the block for the sleeve, do you leave a step at the bottom for the sleeve to rest on?
Rip john
No cooling or lubrication needed when milling?
Is the operation with the end mill for improved airflow?
Yes
top notch
Back "in the day" when guys did that "power slot" by hand with a die grinder, it was called "relieving". When,how,why, did it become a "power slot"?? Not challenging. Just curious???
when you install sleeves do you chill the sleeves?
I notice when you are resurfacing a block or head, there is no coolant used. When the cylinder is honed, a coolant is used. Why don't you use a coolant when the head or block are resurfaced?
The block is cast iron and the sleeves are steel
I've installed a lot of sleeves in my automotive machining career and they were all cast iron. Various different alloys but cast iron just the same.
Coolant makes cast chips into mud when machined...you can use air to cool cast when machining but it’s messy. Honing requires oil to make the finish consistent...honing needs to have the metal and stone particles rinsed away or you get deep scratches when the particles get wedged between the stone and the metal...
The BFH.
Question .Can you sleeve a flathead with a hole in the cylinder wall.
Depends on where the hole is, but yes a sleeve can make up for a hole in the wall. Best to let a machine shop look at it.
Why do you say "re-sleeve", it wasn't sleeved to begin with, was it? No coolant?
Bobby John
Many Ford V8 flat heads came from the factory with sleeves ! I want to say All but ,can’t remember.
As to quality of the steel in the sleeves it was the best ,I don’t think you could improve on it today!
If the block was good ,you could pull the sleeves out, hone the block and have an easy 1/8th over bore!
In 1949 mercury came out with a 4” crank . So using stock Ford parts you could have a much larger engine
A lot of the circle track guys used to take a bar and a sledge and put holes in the block so the coolent was right on the sleeve
Also the relieving of the block really helped that engine breath also the valve pocket in the head ,you would relieve that
And it was all done by hand still have the domore grinder got to be 70 years old
my mecanic told me if theres no tork plate bolted on when working the holes then its a hack job
Thats for honing.
Honing only professor
I would heat the block up and freeze the liner and push it in not beat it with a hammer These guys are crude to say the least You can crack a liner that way beating on them I've seen that happen more than once No way Jose.
ahhhh I don't buy it. Something is wrong. I noticed that you use a relatively low rpm cutting speed. That's one possible reason anyway. A parallel cut either removes all the material or it doesn't. While there is thermal expansion that suggests either the wrong cutting tool is being used or the block is not sufficiently tight in the fixture. It happens twice in your video, during the boring for the sleeve and then the sleeve itself, which are two different grades of steel. Just sayin...
if power slotting a motor makes more power why didn't ford do this at the factory back in the 40's .where they to lazy...
no theres nothing wrong there pretty normal
Focus much???
"Power slot"??? That's called "relieving"! And has been since the 1930's at least. Nothing new here! Just wacky terminology!
Cougracer67
Just a little deuce coupe with a flat head mill
But she'll walk a Thunderbird like it's standin' still
She's ported and relieved and she's stroked and bored.
She'll do a hundred and forty with the top end floored
She's my little deuce coupe
You don't know what I got
Send cash first....