Weight of STOCK LS1 vavles and Material???
02-05-2003, 04:49 PM
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Weight of STOCK LS1 vavles and Material??? What is weight of stock LS1 vavles and what EXACTLY are they made of??? The reason I asked is that Manley 1.55 Exhaust valves weigh 89 grams and 2.00 Intakes weigh 101 grams. Of course these valves are STAINLESS. What are STOCK valves made of and what is their weight????
02-05-2003, 05:50 PM
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Re: Weight of STOCK LS1 vavles and Material??? 97-99 int. weighs 101 grams,2000-02= 100 grams,
exh. is 92grams(97-99) and 87 grams (00-02)
Not sure on materials but i think Joe Prince could help you on that.
exh. is 92grams(97-99) and 87 grams (00-02)
Not sure on materials but i think Joe Prince could help you on that.
02-05-2003, 09:01 PM
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Re: Weight of STOCK LS1 vavles and Material??? 01 intake weighed 99 grams
01 exhaust weighed 86 grams
"In the first place, most valve alloys are not stainless steel. In fact, in the U.S., there is only one that we know of that is truly a stainless steel used by original equipment manufacturers (OEMs). That was not true a number of years ago when several stainless steels were used."
"The strongest intake valve alloy available at 1000° F is 422 SS. Its strength may not always be necessary, however. For most heavy-duty intake applications an alloy called Silcrome 1, or just Sil 1, is typically specified. It holds its strength better at elevated temperatures than the other intake alloys we showed you earlier. Its composition is a lot like 1547, except that it has 3.25% Si and 8.5% Cr, so technically it’s not a stainless."
http://www.automotiverebuilder.com/ar/ar99946.htm
Good read.
01 exhaust weighed 86 grams
"In the first place, most valve alloys are not stainless steel. In fact, in the U.S., there is only one that we know of that is truly a stainless steel used by original equipment manufacturers (OEMs). That was not true a number of years ago when several stainless steels were used."
"The strongest intake valve alloy available at 1000° F is 422 SS. Its strength may not always be necessary, however. For most heavy-duty intake applications an alloy called Silcrome 1, or just Sil 1, is typically specified. It holds its strength better at elevated temperatures than the other intake alloys we showed you earlier. Its composition is a lot like 1547, except that it has 3.25% Si and 8.5% Cr, so technically it’s not a stainless."
http://www.automotiverebuilder.com/ar/ar99946.htm
Good read.
