F355 Valves and Valve guides - anyone have experience with these guys? - Ferrari Life
 
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post #1 of 6 Old 06-18-2015, 09:09 AM Thread Starter
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post #2 of 6 Old 06-18-2015, 12:53 PM
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Dave, I haven't used their stuff in a Ferrari, but I have their valves in a supercharged V8 and their valves & springs in a turbocharged inline 6. They make excellent products and Willy Tagliavini knows his stuff. I'd rate them above Ferrea in quality, and they're very good to work with.

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post #3 of 6 Old 06-19-2015, 04:09 AM Thread Starter
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Thanks, John. Martin Tagliavini and I have been emailing. I've requested technical specs and he is working to get me information. Both intake and exhaust guides from them are the same length where Ferrari intake guides are 2.9 mm longer than exhaust IIRC. So, I've quested that along with the hardness depth of the valves as the tips may need to be ground to maintain the length after dressing the seats.
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post #4 of 6 Old 06-19-2015, 12:53 PM
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Thanks, John. Martin Tagliavini and I have been emailing. I've requested technical specs and he is working to get me information. Both intake and exhaust guides from them are the same length where Ferrari intake guides are 2.9 mm longer than exhaust IIRC. So, I've quested that along with the hardness depth of the valves as the tips may need to be ground to maintain the length after dressing the seats.


I know we talked about this but I was reading the WSM and it states that if the clearance between valve stem tip and cam lobe root diameter is less then the minimum spec then the seats should be changed.

If you are going to tell someone how to remove a bolt you should at least know which way to turn the wrench.
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post #5 of 6 Old 06-19-2015, 07:24 PM Thread Starter
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I know we talked about this but I was reading the WSM and it states that if the clearance between valve stem tip and cam lobe root diameter is less then the minimum spec then the seats should be changed.
I'm pretty sure it's all related to lifter stroke. So far is seems the valves have the bulk of corrosion so I think a mild dress of the seats is all that will be needed. But, If I need to replace them it does not bother me at all.
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post #6 of 6 Old 06-22-2015, 08:12 AM
 
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