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E89 2.8i

Specific discussion about the E89 2009 Z4 (sDrive35is, sDrive35i, sDrive30i, sDrive23i)
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Shady Ady
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E89 2.8i

Post by Shady Ady » Thu Dec 28, 2017 8:15 am

Hi
I am considering upgrading my E85 3.0 next year to an E89 2.8i and have a couple of questions.

Is the automatic option actually a full auto box or is it DCT? Other than preference etc are there any pro's and con's over the manual?

Cruise control is an important option. If not fitted can it be retrospectively fitted?

Apologies if similar has been asked previously.

Many thanks
Ady
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dr_john
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E89 2.8i

Post by dr_john » Thu Dec 28, 2017 8:50 am

I believe that the DCT option is only available on the 35i, so the 28i will have a regular auto box.

Not sure about retro fitting cruise control, I seem to recall posts on this forum from peope who have done it.
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E89 2.8i

Post by Smartbear » Thu Dec 28, 2017 9:27 am

Hi, cruise can be retrospectively added but needs to be coded to enable it to work-there’s some threads on here about it :thumbsup:
Rob
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mr wilks
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E89 2.8i

Post by mr wilks » Thu Dec 28, 2017 10:07 am

Why specifically a 28i :? not that there's anything at all wrong but why not also consider the 20i if its a 4pot single turbo you are after
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Shady Ady
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E89 2.8i

Post by Shady Ady » Thu Dec 28, 2017 10:17 am

Many thanks Dr_john
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Shady Ady
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E89 2.8i

Post by Shady Ady » Thu Dec 28, 2017 10:21 am

Many thanks for the replies guys.
The 2.8i appealed for the power output but I see a 2.0 can easily mapped to give similar. Ive never mapped a car before and just slightly concerned about brakes etc being up to it?
The E85 has been brilliant and incredibly reliable so hoping to emulate that so will have to my research and this forum is a fantastic source.
Will keep you posted
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E89 2.8i

Post by dr_john » Thu Dec 28, 2017 10:37 am

I went from a 28 to a 20 and TBH didn't really notice any difference, but then I'm no boy racer! :D
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E89 2.8i

Post by Busterboo » Thu Dec 28, 2017 10:41 am

Next week'll be 2018 and all E89s will be a year older and a bit cheaper. So, will a 35i, with DCT & cruise control, be within reach financially?

The alternative you've mentioned, with a non-DCT auto box and needing cruise control retro-fit, isn't a good compromise.
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E89 2.8i

Post by Smartbear » Thu Dec 28, 2017 10:45 am

Hi Ady, for your interest here’s a bmw publication which compares the engine performance of the 2litre in 28i guise compared to the 3litre n52 engine, the Dyno figures are on page 10-bear in mind that the 20i can be mapped to outperform the 28i :thumbsup:
http://www.bimmerpost.com/goodiesforyou ... ERPOST.pdf
Rob
Last edited by Smartbear on Thu Dec 28, 2017 8:20 pm, edited 1 time in total.
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e89 Sdrive 30i, this ones busted, pass me another...
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Shady Ady
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E89 2.8i

Post by Shady Ady » Thu Dec 28, 2017 8:15 pm

Thanks Rob, will have a read later tonight
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