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

can lt4 valves handle 210lb seat pressure?

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Old Feb 22, 2007 | 12:31 AM
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lt1rx798's Avatar
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can lt4 valves handle 210lb seat pressure?

my cam requires at least 200lbs of seat pressure, but i need to know that my valves are strong enough.....and can handle 7500rpm safely!
Old Feb 22, 2007 | 02:08 AM
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They stock valves dont need that much pressure, they are hollow stem lightweight pieces.

Bret
Old Feb 22, 2007 | 02:50 AM
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thanks for the reply... i know they are light weight, but are you telling me i dont need that much pressure b/c they are, or are they not strong enough to hold that much?
Old Feb 22, 2007 | 02:13 PM
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You usually don't need that much pressure because they are.

Bret
Old Feb 23, 2007 | 08:43 AM
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From: Dayton, OH
Originally Posted by lt1rx798
and can handle 7500rpm safely!
Apparently you are running an aftermarket computer? They would definitely handle 210 seat pressure btw. Is this a solid roller?
Old Feb 27, 2007 | 01:21 PM
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actually my computer has been burned, but it is a factory cpu.

i do have a solid roller. ....you are sure the stock lt4 (sulfer filled) valves will be o.k. with 210 lb springs? ....i really cant afford to build a time bomb!

by the way, need a definate answer soon b/c my machinist has already cut the seats for the lt4 valves. i will be bringing my lt1 valves today so that the heads can be cut for them otherwise.....

more work...more time...more money!
Old Feb 27, 2007 | 04:12 PM
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Originally Posted by lt1rx798
actually my computer has been burned, but it is a factory cpu.

i do have a solid roller. ....you are sure the stock lt4 (sulfer filled) valves will be o.k. with 210 lb springs? ....i really cant afford to build a time bomb!

by the way, need a definate answer soon b/c my machinist has already cut the seats for the lt4 valves. i will be bringing my lt1 valves today so that the heads can be cut for them otherwise.....

more work...more time...more money!
not sulfer filled, they are sodium filled IIRC
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