Looking for 2.02 1.57 Valves with Stock valvestems
01-24-2002, 10:02 PM
#1
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Looking for 2.02 1.57 Valves with Stock valvestems What brand of 2.02/1.57 valves would I want to buy if I want to keep stock Valvestem/retainer sizes?
Thx!
Thx!
01-25-2002, 03:07 AM
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Re: Looking for 2.02 1.57 Valves with Stock valvestems [quote]Originally posted by MelloYellow:
<strong>What brand of 2.02/1.57 valves would I want to buy if I want to keep stock Valvestem/retainer sizes?
Thx!</strong><hr></blockquote>
Ferrea do a good range...
<strong>What brand of 2.02/1.57 valves would I want to buy if I want to keep stock Valvestem/retainer sizes?
Thx!</strong><hr></blockquote>
Ferrea do a good range...
01-25-2002, 08:27 PM
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Re: Looking for 2.02 1.57 Valves with Stock valvestems [quote]Originally posted by 2000RATA:
<strong>I don't know the stem lenght off the top of my head but the stem diameter is 5/16 or .3125".</strong><hr></blockquote>
8mm is std size...Pt#F6231 for intake 4.915" long...1.55 exh. #F6232 also do 1.6" exhaust F6233 4.915" long
<strong>I don't know the stem lenght off the top of my head but the stem diameter is 5/16 or .3125".</strong><hr></blockquote>
8mm is std size...Pt#F6231 for intake 4.915" long...1.55 exh. #F6232 also do 1.6" exhaust F6233 4.915" long
01-25-2002, 09:39 PM
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Re: Looking for 2.02 1.57 Valves with Stock valvestems Thx!
If I put these on a stock LS1 Head, will these work with the stock valve seats? Am learning here..
The reason S1 heads and people use 2.02/1.57's is cuz they work with stock seats & guides, right??
If I put these on a stock LS1 Head, will these work with the stock valve seats? Am learning here..
The reason S1 heads and people use 2.02/1.57's is cuz they work with stock seats & guides, right??
01-25-2002, 10:11 PM
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Re: Looking for 2.02 1.57 Valves with Stock valvestems [quote]Originally posted by MelloYellow:
<strong>Thx!
If I put these on a stock LS1 Head, will these work with the stock valve seats? Am learning here..
The reason S1 heads and people use 2.02/1.57's is cuz they work with stock seats & guides, right??</strong><hr></blockquote>
yep....don't recon you have to go to 1.57" exhaust...can get 80% ratio with 1.55" for what it is worth.
<img src="gr_images/icons/cool.gif" border="0">
<strong>Thx!
If I put these on a stock LS1 Head, will these work with the stock valve seats? Am learning here..
The reason S1 heads and people use 2.02/1.57's is cuz they work with stock seats & guides, right??</strong><hr></blockquote>
yep....don't recon you have to go to 1.57" exhaust...can get 80% ratio with 1.55" for what it is worth.
<img src="gr_images/icons/cool.gif" border="0">
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01-25-2002, 11:12 PM
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Re: Looking for 2.02 1.57 Valves with Stock valvestems I've seen Ferrea, REV, and Manley in 8mm LS1 size. The Ferrea's are most expensive and then they go down in the order above.
Most go the 2.02 1.57 Route because 1) they are the largest that will fit in the stock seats, 2) they are about as large as you can go without serious shrouding of the valve by the side of the head or the cylinder wall, and 3) a bigger valve than stock allows a new fresh valve grind on virgin material because it sits wider on the seat, and 4) who's gonna buy aftermarket valves that are stock in size? Profit!
If you're looking for a set of valves....email me I might be able to help you. I hope that helps.
Most go the 2.02 1.57 Route because 1) they are the largest that will fit in the stock seats, 2) they are about as large as you can go without serious shrouding of the valve by the side of the head or the cylinder wall, and 3) a bigger valve than stock allows a new fresh valve grind on virgin material because it sits wider on the seat, and 4) who's gonna buy aftermarket valves that are stock in size? Profit!
If you're looking for a set of valves....email me I might be able to help you. I hope that helps.
01-26-2002, 08:55 PM
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Re: Looking for 2.02 1.57 Valves with Stock valvestems [quote]Originally posted by Jantzer98SS:
<strong>I've seen Ferrea, REV, and Manley in 8mm LS1 size. The Ferrea's are most expensive and then they go down in the order above.
Most go the 2.02 1.57 Route because 1) they are the largest that will fit in the stock seats, 2) they are about as large as you can go without serious shrouding of the valve by the side of the head or the cylinder wall, and 3) a bigger valve than stock allows a new fresh valve grind on virgin material because it sits wider on the seat, and 4) who's gonna buy aftermarket valves that are stock in size? Profit!
If you're looking for a set of valves....email me I might be able to help you. I hope that helps.</strong><hr></blockquote>
have found the std size 1.55" exh Ferrea out flows the stock valve by a week....they do them in 2 shapes on the back of the valve....this is where the improve comes from the std exhaust seat is cut not utilising the valve area available...this is also an area where improvement is found. Which everway it will work....just be careful of how much exh. % you end up with.
[ January 26, 2002: Message edited by: HOWQUICK ]</p>
<strong>I've seen Ferrea, REV, and Manley in 8mm LS1 size. The Ferrea's are most expensive and then they go down in the order above.
Most go the 2.02 1.57 Route because 1) they are the largest that will fit in the stock seats, 2) they are about as large as you can go without serious shrouding of the valve by the side of the head or the cylinder wall, and 3) a bigger valve than stock allows a new fresh valve grind on virgin material because it sits wider on the seat, and 4) who's gonna buy aftermarket valves that are stock in size? Profit!
If you're looking for a set of valves....email me I might be able to help you. I hope that helps.</strong><hr></blockquote>
have found the std size 1.55" exh Ferrea out flows the stock valve by a week....they do them in 2 shapes on the back of the valve....this is where the improve comes from the std exhaust seat is cut not utilising the valve area available...this is also an area where improvement is found. Which everway it will work....just be careful of how much exh. % you end up with.
[ January 26, 2002: Message edited by: HOWQUICK ]</p>
01-27-2002, 08:27 AM
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Re: Looking for 2.02 1.57 Valves with Stock valvestems Thx everyone!
So, they will work with the stock seats too.
Someone local said something about a 3 angle cut valve job? Is that necessary?
If you slap these valves onto our stock heads, what other work do you need to do? Lap them in? Do the seats need modifications?
What Intake/Exhaust flow ratio is ideal for a SC setup?
[ January 27, 2002: Message edited by: MelloYellow ]</p>
So, they will work with the stock seats too.
Someone local said something about a 3 angle cut valve job? Is that necessary?
If you slap these valves onto our stock heads, what other work do you need to do? Lap them in? Do the seats need modifications?
What Intake/Exhaust flow ratio is ideal for a SC setup?
[ January 27, 2002: Message edited by: MelloYellow ]</p>
01-27-2002, 09:27 PM
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Re: Looking for 2.02 1.57 Valves with Stock valvestems atless a valve jod done on the heads will be a good Idea...will have too do that too use the bigger valve anyways.... the 3 angles is usraly on the seat.
