How are 458 piston rings divided? - Ferrari Life
 
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post #1 of 6 Old 03-17-2014, 08:46 PM Thread Starter
 
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How are 458 piston rings divided?

I'm looking at a diagram and it's showing 8 piston rings. How do they divide them between combustion and oil? 6 combustion and 2 oil, or?
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post #2 of 6 Old 03-18-2014, 05:03 AM
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That's a good brain buster for the morning... 8 rings would A LOT... I'm looking at the diagram on Ricambi and it looks like 5 rings. The two top ones are usually flame rings. The bottom two rings are usually oil rings which are in one groove together and separated by a piece of spring steel. I'm not sure what the middle ring would be though. Would be interesting to hear from the guys who have worked on them.

ferrari 458 Italia Parts : Table 2 - DRIVING SHAFT - CONNECTING RODS AND PISTONS
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post #3 of 6 Old 03-18-2014, 05:48 AM
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I think the Ricambi diagram is simply showing the three piece segmentation of the oil control ring, then there's the upper & lower compression rings. IOW, a pretty conventional setup.

I think the "8" that cutter was asking about was actually referring to the quantity of "ring sets" required per engine.

Since it's one ring set per piston, there are 8 sets required for the engine.

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post #4 of 6 Old 03-18-2014, 06:25 AM
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Quote:
Originally Posted by cribbj View Post
Since it's one ring set per piston, there are 8 sets required for the engine.
Indeed John; you are correct. Historically Ferrari has sold rings per "hole", versus as a complete engine set. And as memory serves me, Ferrari is very fond of their rings with regards to pricing, but that's a story for another day.

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post #5 of 6 Old 03-18-2014, 07:49 AM
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Quote:
Originally Posted by David @ FluentInFerrari View Post
Indeed John; you are correct. Historically Ferrari has sold rings per "hole", versus as a complete engine set. And as memory serves me, Ferrari is very fond of their rings with regards to pricing, but that's a story for another day.
$100 per ring and that is pretty standard for Ferrari since they started to use Mahle.


Mahle is as good as it gets and they have been very cooperative with Ferrari making sure there is no availability outside official Ferrari parts supply channels so the price is crazy.
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post #6 of 6 Old 03-18-2014, 11:21 AM Thread Starter
 
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Ah, that clears things up. Thanks everybody.
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