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Diamonds out of coal |
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jcisworthy
AMC Addicted Joined: Jul/23/2009 Location: North Carolina Status: Offline Points: 2805 |
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Jim, I have a street 360 in the works now that I think will make 480-500 hp. I like 360's personally.
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Specializing in dyno services, engine building, and cylinder head porting
rbjracing.com Phone Number 518-915-3203 |
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billd
Moderator Group Forum Administrator Joined: Jun/27/2007 Location: Iowa Status: Offline Points: 30894 |
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I'll cut and grind iron any day over aluminum.
Talk about plugging up the tools......... I'm not a head professional as far as porting, etc. but have done enough to say - I prefer cutting and grinding iron heads over aluminum. I was doing aluminum head a few weeks ago and still can see the aluminum in my cutting tools. Maybe I was using the wrong tools for the chore, but it's what I have. When I saw the topic - I thought, geesh, that's some hellish compression to turn that into diamonds! |
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jcisworthy
AMC Addicted Joined: Jul/23/2009 Location: North Carolina Status: Offline Points: 2805 |
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When grinding aluminum I regularly "dip" the carbides in edge lube to keep them from plugging up
http://www.lpslabs.com/product-details/632
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Specializing in dyno services, engine building, and cylinder head porting
rbjracing.com Phone Number 518-915-3203 |
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jpnjim
AMC Addicted Joined: Nov/25/2007 Location: New England Status: Offline Points: 2752 |
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I like 360's because off the shelf .030 over pistons still leave plenty of cylinder wall thickness for another re-bore down the road. It's too bad that the numbers aren't there to support the parts, we're only a cheap 4" AMC crank away from every run of the mill 360 turning into a stump pulling 428. I know you've actually gone down the road of trying to get one forged John so I know I'm preaching to the choir here. Looking forward to your 360 build
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71 P-code 4spd Javelin/AMX
some Jeeps and some Fords |
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jpnjim
AMC Addicted Joined: Nov/25/2007 Location: New England Status: Offline Points: 2752 |
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^interesting stuff, does it liquify as it heats up? Or stay a wax and provide lube that way?
I don't plan to make a habit out of grinding Aluminum, but I started to take the outer exhaust port "lip" off my Eddy's (minimal grinding) and filled the exhaust ports with WD40 before starting. As the stone got plugged I dipped it in the port and kept going. |
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71 P-code 4spd Javelin/AMX
some Jeeps and some Fords |
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jcisworthy
AMC Addicted Joined: Jul/23/2009 Location: North Carolina Status: Offline Points: 2805 |
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When the burr has some heat in it and it looks like it is wanting to start loading, you dip it in the edge lube and it comes out basically clean.
When you start grinding, the edge lube is on the burr slings off and away you go. The burrs do not load up if you keep using it. Never tried it with stones
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Specializing in dyno services, engine building, and cylinder head porting
rbjracing.com Phone Number 518-915-3203 |
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FSJunkie
AMC Addicted Joined: Jan/09/2011 Location: Flagstaff, AZ Status: Offline Points: 4741 |
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The weight savings are the main benefit of Edelbrock aluminum heads. Actual horsepower isn't that different.
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1955 Packard
1966 Marlin 1972 Wagoneer 1973 Ambassador 1977 Hornet 1982 Concord D/L 1984 Eagle Limited |
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billd
Moderator Group Forum Administrator Joined: Jun/27/2007 Location: Iowa Status: Offline Points: 30894 |
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Thanks for that. Stones are likely another issue, in some cases I cut fast with disks for really rough cuts. But the aluminum tends to plug the abrasive edges.
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jcisworthy
AMC Addicted Joined: Jul/23/2009 Location: North Carolina Status: Offline Points: 2805 |
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Two valid points but consider these also All mounting surfaces warped, pitted, rusted. Every surface needs surfacing. Edelbrock have thicker decks for better head gasket sealing Some iron castings have 4 of the 6 exhaust bolt holes at 5/16 threads so drilling and tapping to 3/8 Many castings have broken exhaust bolts which need to come out and possible thread repair Guides need K-liners at minimum. i install full bronze guides Valve jobs and if the heads were messed with the choke point is typically too large for best air flow so larger valves are needed to size properly, if that is a concern. It is for me Very dirty to work with Cracks, I have to admit that I do not see a lot of cracks in these heads. Almost always 291's were the heads I have seen cracks in Porting takes days to size and get higher CFM These are some quick things that come to mind I am sure there are more |
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Specializing in dyno services, engine building, and cylinder head porting
rbjracing.com Phone Number 518-915-3203 |
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one bad rambler
AMC Addicted Joined: Jan/09/2008 Location: On The Island Status: Offline Points: 2007 |
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We assembled this engine a month or so ago...It was done by one of the top engine builder`s here on Long Island (Know retired)...Everything has it`s place...Alot of power can be made with a factory casting...but it`s hard to out flow a quality aftermarket piece...Just under 1,200 hp on a 585 low deck...Not AMC but knowledge is knowledge....If an expert is talking...i am listening....
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68 AMX 390 4 Speed,68 American,64 American 2 Door Wagon Altered Wheelbase,78 Concord Build 360,727,8.8
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