Valve Guides F20C - Honda S2000
02-20-2019, 01:34 PM
#1
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Valve Guides F20C - Honda S2000
Hi,
I would like to know why the valve guides (especially on the exhaust side) often show excessive wear in the F20C and what would be the best way to adress this problem.
Are these valve materials also used in the S2000-engine?
In: stem= SUH11 Head=SUH35(EV-8)
Ex: Stem= SUH11 Head =NCF751 (Inconel based alloy)
What materials are used for the valve guides? The same for intake and exhaust? Does the exhaust side wear a lot more due to the higher temperatures?
What material do you guys recommend for valve guides?
I am not sure what to choose from the aftermarket, because nobody does really specify what they are using. I am thinking about using OEM-style valve guides with a different material.
Thank you for your help.
JagoBlitz
I would like to know why the valve guides (especially on the exhaust side) often show excessive wear in the F20C and what would be the best way to adress this problem.
Are these valve materials also used in the S2000-engine?
In: stem= SUH11 Head=SUH35(EV-8)
Ex: Stem= SUH11 Head =NCF751 (Inconel based alloy)
What materials are used for the valve guides? The same for intake and exhaust? Does the exhaust side wear a lot more due to the higher temperatures?
What material do you guys recommend for valve guides?
I am not sure what to choose from the aftermarket, because nobody does really specify what they are using. I am thinking about using OEM-style valve guides with a different material.
Thank you for your help.
JagoBlitz
02-23-2019, 09:06 PM
#2
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Re: Valve Guides F20C - Honda S2000
Hi. That’s not actual problem, instead normal wearing in every high revving engine, especially exhaust side. Exhaust valveguides are working much harsher conditions than intake. Temperature and its variation, exhaust gas particles. There’s also bigger stem to guide clearance already because of thermal expansion. So in that perspective, oe-guides are doing good job.
For the reasons I mentioned earlier, aftermarket bronzeguides are usually bit different alloys between exhaust and intake side. But we have to also remember that why bronzeguides are used and it is not longevity. They are softer but have better self-lubricating and thermal conduction qualities.
For the reasons I mentioned earlier, aftermarket bronzeguides are usually bit different alloys between exhaust and intake side. But we have to also remember that why bronzeguides are used and it is not longevity. They are softer but have better self-lubricating and thermal conduction qualities.
02-24-2019, 12:47 AM
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Re: Valve Guides F20C - Honda S2000
Yes, OE-guides are doing a good job. But if i am going to replace them, I would like an upgrade if possible.
Especially the self-lubricating property of copper-alloys is a big advantage. And 20 years after the engine was designed there may be an alternative material available which combines the self-lubrication with sufficient hardness. Right now, I am thinking about using Toughmet 3.
So, what is the material that's originally used?
Especially the self-lubricating property of copper-alloys is a big advantage. And 20 years after the engine was designed there may be an alternative material available which combines the self-lubrication with sufficient hardness. Right now, I am thinking about using Toughmet 3.
So, what is the material that's originally used?
02-24-2019, 02:07 PM
#4
Re: Valve Guides F20C - Honda S2000
Yes, OE-guides are doing a good job. But if i am going to replace them, I would like an upgrade if possible.
Especially the self-lubricating property of copper-alloys is a big advantage. And 20 years after the engine was designed there may be an alternative material available which combines the self-lubrication with sufficient hardness. Right now, I am thinking about using Toughmet 3.
So, what is the material that's originally used?
Especially the self-lubricating property of copper-alloys is a big advantage. And 20 years after the engine was designed there may be an alternative material available which combines the self-lubrication with sufficient hardness. Right now, I am thinking about using Toughmet 3.
So, what is the material that's originally used?
02-24-2019, 03:23 PM
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02-25-2019, 12:50 PM
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Re: Valve Guides F20C - Honda S2000
we just don't go that far down the rabbit hole of metallugy like in years past. But i wish you luck.
02-25-2019, 01:12 PM
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Re: Valve Guides F20C - Honda S2000
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02-26-2019, 09:20 PM
#8
Re: Valve Guides F20C - Honda S2000
This is where us old schoolers would get an actual guide and get some analysis performed
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