Nc2 engine upgrades

Technical Area Engine, Transmission, Exhaust etc
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Hi eveyone, could anybody tell me apart from the forged crank…if mazda re designed the piston rings in the nc2. I know they can fail when the car hasnt been serviced regularly, however is there a revised design for the nc2. People think the crank was fogred with lighter pistons to rectify the issue but i believe that is only for the car to rev higher. Id like to hear what people have to say with some evidence to back it up, thanks. PFA

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Personally, the only people to answer your question is to ask someone who has “expert” knowledge and an engine rebuilder/tuner and confident that Roddinsons Motor Sport will know the answers.
If you email Mazda, they will also answer your questions from their Technical Department.

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Any idea on whete to email the technical department, i think everyone has different opinions on the matter but nobody really knows, you do tend to see its mostly the nc1s with rod knock but who knows why

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Did you read this below, particularly the part lower down re the NC2 engine…

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Thanks for that mick good bit of info, it states revised pistons but i believe this is reffering to them weighing less so the car can rev higher. I could be wrong though

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Either the online form or the email.
I used the online form and requested they please forward to the technical department. :+1:

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Thanks for that, i doubt they will admit their is a flaw in their design though

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Of course not! :flushed::joy:
You will be very lucky if they tell you anything more than is already published. :man_shrugging:
But worth a go.:+1:

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I thought I had read that the piston mod was to floating gudgeon pins in place of the heat fitted ones on the NC1

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I saw something like that, i dont know if thats gping to benefit compression rings though tbh

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With the available piston ring sets listed as fitting 2006 to 2015 it seem that nothing changed size wise.

So the only change I could see would be extra / different drain holes in the groove behind the oil control rings.

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Good spot. Who knows whether that helps the longevity of the compression rings

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