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Old 03-22-2012, 09:28 PM
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Head machine work questions.

So the machinist here in town is planning to retire soon... I need my 820s decked a little (for a good surface), new guides and larger valves (on top of crack check).


Do I need the valves to get the heads machined?


Do the new valves need to be machined? I'm looking at manley street flow 2.19 and 1.88 valves.


If I could just get the head done now and get valves next month that'd be sweet...



Greg

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Old 03-22-2012, 10:00 PM
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No, you don't want the valves in the heads when they are surfaced, no the new valves "shouldn't" need to be machined.....but yes, the heads will have to have their valve seats machined for the new valves.....among maybe some other things like new valve guides or having the guides shortened depending on the cam and springs.
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Old 03-22-2012, 10:11 PM
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So... I could just take him my bare heads and have him cut em for the bigger valves and do a valve job without the valves then right? Just don't wanna look like a dummie when I go in.

Gonna end up with bee hive springs to avoid machine work to run duals, also allows me to use stock length valves.

Already has screw in studs and such.. I'm not cutting corners, just wasn't sure if I needed to bring the valves in with the heads to be machined (not installed).


If I understand correct this allows me to do all my machine work in may and just get the valves in june or july..



Greg
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Old 03-23-2012, 12:24 AM
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Don't know about your guy but the machine shops I've dealt with want EVERYTHING....heads, valves, springs, retainers and keepers. They need to know as much as you can tell them so they can set your installed valve spring heigth. Don't worry about looking stupid, ASK the man what he needs and do it right the first time. Good luck and have fun with your build.
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Old 03-23-2012, 01:57 AM
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Thanks I'll ask.


Greg
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Old 03-23-2012, 04:30 AM
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Quote:
Originally Posted by 327NUT
Don't know about your guy but the machine shops I've dealt with want EVERYTHING....heads, valves, springs, retainers and keepers. They need to know as much as you can tell them so they can set your installed valve spring heigth. Don't worry about looking stupid, ASK the man what he needs and do it right the first time. Good luck and have fun with your build.
X2. Plus, I run ALL new valves thru the valve facer. You never know what has happened to those "new" valves ( dropped during manufacturing, run over by a fork truck etc) before they were installed in the heads..
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