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      07-08-2013, 02:23 PM   #1
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328 vs 320 N20 pistons

Note sure if these has been posted already, but Terry from BMS just posted these over at n54tech.

Quote:
Hey guys,

For those interested we were able to obtain some photos of the 320 and 328 pistons. The 320 pistons are definitely a little higher CR but look just as beefy to me.


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      07-08-2013, 03:52 PM   #2
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According to the BMWUSA.com website, compression is listed for 10:1 on the 320i. Is that incorrect?
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      07-09-2013, 02:01 PM   #3
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Quote:
Originally Posted by BobbyP View Post
According to the BMWUSA.com website, compression is listed for 10:1 on the 320i. Is that incorrect?
I think so.(?) There ha been some discussions whether the n20 320i's pistons were 10:1 or 11:1. I guess that discussion is now over with that picture from BMS.
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      07-10-2013, 08:43 PM   #4
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Quote:
Originally Posted by F30 Kupal View Post
I think so.(?) There ha been some discussions whether the n20 320i's pistons were 10:1 or 11:1. I guess that discussion is now over with that picture from BMS.
Isn't higher ratio provide higher potential for upgrading?
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      07-13-2013, 12:12 AM   #5
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Any more news on tuning the 320i?
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      07-13-2013, 01:11 AM   #6
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Quote:
Originally Posted by TheDukeYYC
Any more news on tuning the 320i?
Not really... I am running +4 psi of boost safely with the bms. The 320i is 11:1. Higher compression engines are harder to tune. Thats one of the main reasons why our numbers will never match a 328i. Nor will the gas mileages.
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