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I6 differences?

4159 Views 46 Replies 14 Participants Last post by  NyquistRate
So there was an article posted by TFL saying the 2 - I6 variants are mechanically identical and the hp/tq rating difference is only due to premium vs regular fuel.

Any way to confirm this as it seems hard to believe. I would assume there are pressure differences between the turbos or something in the computer programming.

I know someone had access to the parts diagrams. Are the turbo units the same part numbers between S and non-S variants?
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Agreed that it isn't different engine hardware and likely tuning differences. Would that also allow them to increase the boost pressure or would they use a different turbo? If the internals are the same then the non-S engine and transmission is being stressed less in terms of boost pressure and hp/tq.

The Mazda usa specs page has a different description for the electric motor on the S and non-S model but the hp and torque specs are the same so I don't think that is the difference.
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It's all programming. Mazda doesn't want it to make more power so they electronically limited it. Saying no its not done that way doesn't make sense, it's Mazda's engineering decision. As a consumer we all weigh the products and make our decisions.

In the same vein I am sure Mazda could have pushed up the boost and programming to get 400+hp out of this engine. A boosted inline 6 is certainly capable of it but that wasn't their goal.
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You can justify it as much as you want , for me it is a turn off , political sales decision from Mazda.
It will not help convincing me to get CX90 and actually opposite ...
I'm not justifying anything and have no dog in this fight. Buy what you want.
Turbo S Premium and Premium Plus both have heated steering wheel.
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