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

Heads have been ported now what machine work is needed?

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Old Feb 19, 2003 | 06:22 PM
  #1  
ucrazymonkey's Avatar
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From: San Antonio, Texas
Heads have been ported now what machine work is needed?

The heads have been ported and lightly glass beaded. Now what machine work will be needed? I have a choice between a 3 angle or 5 angle valve job. What are the pros and cons when having a valve job done, and what should I watch for? They say it includes pocket porting. Now I am going to have them cut for larger valves and also have them milled. Do I go 10,000ths or more?
Im I missing anything?
Old Feb 19, 2003 | 06:58 PM
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From: looking for a flow bench so Brook and I can race
Re: Heads have been ported now what machine work is needed?

Originally posted by ucrazymonkey
The heads have been ported and lightly glass beaded. Now what machine work will be needed? I have a choice between a 3 angle or 5 angle valve job. What are the pros and cons when having a valve job done, and what should I watch for? They say it includes pocket porting. Now I am going to have them cut for larger valves and also have them milled. Do I go 10,000ths or more?
Im I missing anything?
nothing is really "needed" except making sure its flat-

anything beyond a 3 angle is really superflous. Id reccomend some good valves and having them backut. dont bother installing crazy oversized valves.

as far as milling-
i'm milling mine so i can run higher comression
Old Feb 19, 2003 | 08:48 PM
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ucrazymonkey's Avatar
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Hey Trey how is the 383?

Im probably going with Manley Race Pro Valves. 2.00 I and 1.56 E. I think I can get them from Summit for $156.00 more or less. As the machine work, I beileve it will cost $20 a head to have milled. These were my old heads off my TA when I decided to drive when they were a little warm . How much shoud the heads be milled? The machine shop wants $185 to cut for larger valves and do a 3 angle valve job. $50 for GTP to do a bench flow.
Old Feb 19, 2003 | 10:01 PM
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From: near waco tx.
Originally posted by ucrazymonkey
Hey Trey how is the 383?

Im probably going with Manley Race Pro Valves. 2.00 I and 1.56 E. I think I can get them from Summit for $156.00 more or less. As the machine work, I beileve it will cost $20 a head to have milled. These were my old heads off my TA when I decided to drive when they were a little warm . How much shoud the heads be milled? The machine shop wants $185 to cut for larger valves and do a 3 angle valve job. $50 for GTP to do a bench flow.
hey i see your in san antonio so i just wanted to let you no that there is a place in waco (machine shop) that will mill the heads cut in bigger valves (what ever size) and cut for new springs like 987s that ill be using. and assemble the heads all for 132 bucks.
thats what they quoted me.

my buddy got is stock heads done there and they put in springs good to .600 , locks , seats, retainers. and 1.6 rr. and new valves 2.02 .1.64, milled, all machine work too including a 3 angle valve job. and they furnished alll the stuff including the rrs, and valves for only 600 bucks.

my be worht your drive. just letting you know.
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