LT1 Based Engine Tech 1993-1997 LT1/LT4 Engine Related

Can heads be ported without having valves and springs present?

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Old Jun 19, 2003 | 05:29 PM
  #1  
thewinner's Avatar
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Can heads be ported without having valves and springs present?

Can a set of heads be ported without having the valves and springs? if not, do you just need the valves?

Like if i have a bare set of castings ported, can i buy the valves later and when im ready get a valve job and put them in?

thanks
Old Jun 19, 2003 | 06:05 PM
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The porter doesn't necessarily need the valves but he should know the size of the valves being used.

The only problem I see here is the fact that the seats, once cut, will need to be blended into the throat. In that case it'd be beneficial for the porter to work the heads before and maybe even after the machine work.
Hopefully Chuck, Phil or Lloyd will chime in here as to their preferences but you could just find out what your porter recommends and go that route.

-Mindgame
Old Jun 20, 2003 | 01:34 AM
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so.... if i have them port the heads and give them the valves, can the person who does the valvejob and the seats, go ahead and blend that? or does it need to be done a certain way?
Old Jun 20, 2003 | 01:48 AM
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as long as they have a valve the exacty same size as you plan to use(in order to setup the valve job) you don't need the valves.
Old Jun 20, 2003 | 01:56 AM
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thanks Jordon
Old Jun 20, 2003 | 09:40 AM
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ttt
Old Jun 20, 2003 | 09:47 AM
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I prefer it is my head porter has the valves, spring/locks/retainers, and the gasket set I am using. That way all ports are matched, valves are deshrouded as much as they can be (using the head gasket as a template), and the valves seated, lapped, and blended. Besides...they can't really flow your heads without the valves...
Old Jun 20, 2003 | 11:19 AM
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BTW Mike, how is that set of heads coming?
Old Jun 20, 2003 | 11:44 AM
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Originally posted by Grover
BTW Mike, how is that set of heads coming?
they would probably be done if I had gotten him the gaskets. I need to order those today. Thanks for the reminder.

We ended up having to pay off the lien on our house from my old boss so we could refinance, and they gave us basically 3 hours to do it or we would have had to go through closing all over again. So the mod money got spent on that temporarily...
Old Jun 21, 2003 | 01:34 PM
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Originally posted by Timberwolf
That way all ports are matched, valves are deshrouded as much as they can be (using the head gasket as a template), and the valves seated, lapped, and blended.
It doesn't cease to amaze me that lapping, something that should have died in the early 60s, is still done today, even with today's big buck seat machining equipment. A precision 'valve job' is done, and then you rub grit in the seat. LOL.
Old Jun 21, 2003 | 03:47 PM
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Just depends.. I won't do stuff without a set of valves. Most guys don't install bronze guides/liners... but poor tolerances & iron as a guide material arent something I want to give to people. So.. yeah, I'd need the valves to be able to hone guides to the proper tolerances. A VJ? I won't do it without the valves I'm using.. how am I supposed to check my job out, or finish valve prep w/o them?

Lapping.. everybody's doing it, but we talked about that before .
Old Jun 21, 2003 | 04:43 PM
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Originally posted by SkarodoM
Lapping.. everybody's doing it, but we talked about that before .
Just thot you might bite/nibble.
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