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F30 320i vs f30 328i
17-12-2012, 10:59 PM
Post: #1
F30 320i vs f30 328i
What would be a better buy? Does the 320i and 328i have the same motor?

If one does software on the f30 320i would it be performing same as a 328i?
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18-12-2012, 09:35 AM
Post: #2
RE: F30 320i vs f30 328i
As far as i know, both have the same displacement.

I would go for a 320i with a software upgrade Thumbs

The 328i just isnt worth the extra money!

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18-12-2012, 09:36 AM
Post: #3
RE: F30 320i vs f30 328i
From what I have heard, you cannot map a 320i to the same power outputs of the 328i, will be around 160kw (flywheel) on 320i.

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18-12-2012, 09:45 AM
Post: #4
RE: F30 320i vs f30 328i
You also need to look at the brakes, diff, gearbox, etc.

However, that engine definitely has some nice tuning potential that seems very close to the 328i. Thumbs

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18-12-2012, 09:47 AM
Post: #5
RE: F30 320i vs f30 328i
Being a turbo'd engine, I'm sure that you could push 328i power out of the 320i, but there must be some hardware differences in the 328i that helps give it the edge.

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18-12-2012, 10:04 AM
Post: #6
RE: F30 320i vs f30 328i
Guys... the two engines are NOT the same even though it sounds like it at first glimps.

The F30 328i has a compression ratio of 10:1 as where the F30 320i has a compression ratio of 11:1

If one looks at the compression volume of both engines the difference is obvious: F30 320i: 49,9 cm³ but F30 328i: 53,7 cm³ which indicates that different pistons are used in the 328i

With an initial compression ratio of 11:1 on a turbo engine you can be sure that you are close to the knock line so I see VERY VERY little chance to gain much power through software!

Of course.... one needs to "play" with it a bit to see what actually goes Idea
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18-12-2012, 10:12 AM
Post: #7
RE: F30 320i vs f30 328i
Are you saying the 328 has more software potential than the 320?
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18-12-2012, 10:13 AM
Post: #8
RE: F30 320i vs f30 328i
(18-12-2012 10:12 AM)petrivanzyl Wrote:  Are you saying the 328 has more software potential than the 320?

Definitively YES! Thumbs
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18-12-2012, 11:08 AM
Post: #9
RE: F30 320i vs f30 328i
(18-12-2012 09:45 AM)msm@PromotecAuto Wrote:  You also need to look at the brakes, diff, gearbox, etc.

However, that engine definitely has some nice tuning potential that seems very close to the 328i. Thumbs

(18-12-2012 10:04 AM)Rolf@PromotecAuto Wrote:  With an initial compression ratio of 11:1 on a turbo engine you can be sure that you are close to the knock line so I see VERY VERY little chance to gain much power through software!

Ok, I'm confused... does it have decent tuning potential, or very little potential?

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18-12-2012, 11:19 AM
Post: #10
RE: F30 320i vs f30 328i
The F30 320i is running very close to the max achievable power as it comes from the factory!

The high compression ratio of 11:1 prevents you from getting much closer to the knocking line.
IF one would attempt to gain loads of power one would have to reduce compression in order to raise boost (boost = power)

So the answer to your question is a simple "NO potential" or let me rather say not much potential....

... and let me add: you can certainly NOT convert a F30 320i to an 328i with a few easy and cheap steps! (BMW would be stupid to allow that)

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18-12-2012, 11:37 AM
Post: #11
RE: F30 320i vs f30 328i
Do they even have the same size turbo...?

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18-12-2012, 12:08 PM
Post: #12
RE: F30 320i vs f30 328i
Ok, thats kind of sad if you want more power out of the car,

Im going to apply for my 320i m sport today....i drove it and although its not super fast its still good.

Its either the 320 or stick with my kia for now
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18-12-2012, 12:15 PM (This post was last modified: 18-12-2012 12:44 PM by ///Shaun.)
Post: #13
RE: F30 320i vs f30 328i
(18-12-2012 11:19 AM)Rolf@PromotecAuto Wrote:  The F30 320i is running very close to the max achievable power as it comes from the factory

NOT !

@MSM you say different diffs , gearbox in f30 328i vs f30 320i. Please expand more on this. Lets see if google can help your explanations here.

I have a f30 MSport 320i added to my garage currently and a f30 MSport 335i on order. I chose both with M running gear and thats completely different motors but the ....lets see if google can help you here.

F30 320i and F30 328i have different turbos and different compressions and thats about it. Internals are the same !
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18-12-2012, 12:46 PM
Post: #14
RE: F30 320i vs f30 328i
(18-12-2012 12:15 PM)///Shaun@xcede Wrote:  F30 320i and F30 328i have different turbos and different compressions and thats about it. Internals are the same !

Shaun.... isn't that a bit contradicting?
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18-12-2012, 12:49 PM (This post was last modified: 18-12-2012 01:03 PM by ///Shaun.)
Post: #15
RE: F30 320i vs f30 328i
(18-12-2012 12:46 PM)Rolf@PromotecAuto Wrote:  
(18-12-2012 12:15 PM)///Shaun@xcede Wrote:  F30 320i and F30 328i have different turbos and different compressions and thats about it. Internals are the same !

Shaun.... isn't that a bit contradicting?

Im sure you know what i meant. Typing from my phone. Will post up the complete specs between the motors when Im back.

Tuned f30 320i

http://www.f30post.com/forums/showthread.php?t=611684
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18-12-2012, 03:36 PM
Post: #16
RE: F30 320i vs f30 328i
Thumbs
Getting interresting...

@Shaun... I see you signed tuned F30 320i... Did you do a tune on your car?

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18-12-2012, 04:02 PM
Post: #17
RE: F30 320i vs f30 328i
(18-12-2012 03:36 PM)DeoJor Wrote:  @Shaun... I see you signed tuned F30 320i... Did you do a tune on your car?

Are you referring to his previous post? If so, that's not his sig, that's a second post which the system appended (since there weren't any posters after him at that point in time).

I recall him saying in his showroom thread that he wouldn't be tuning the 320i.

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18-12-2012, 04:07 PM
Post: #18
RE: F30 320i vs f30 328i
Flyfun oh ok, I see the linkup now

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18-12-2012, 04:09 PM
Post: #19
RE: F30 320i vs f30 328i
I still need to see that with my own eyes.... Idea
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18-12-2012, 05:25 PM
Post: #20
RE: F30 320i vs f30 328i
buy the 328i ,
drive it like a mapped 320i
& u got no motorplan issues Idea


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