All about Z4 (E89/ E86/ E85) thread

Re: All about Z4 (E89/ E86/ E85) thread

LondonBridge;645671 said:
Raidengear got the same exo and has the same ride as me; he can feel the power lost too so I guess it should be the exo issue. The joint is more like a clip, they didn't weld it together tho. Could that be the reason of the power lost?
Click to expand...

valjean;645679 said:
Hey, nice meeting you yesterday.

I also experiencing quite noticeable low-end loss after installing aftermarket exos... sigh...
Click to expand...

Hi LondonBridge/valjean,
I had the same experience previously when I changed to aftermarket muffler.
One possible reason is due to leaks. Another reason is ECU-related. Something to do with adaptive values.
For my case, there was no leak.
So I went to reset my ECU. After that, no more loss at the low end. In fact, now the low end is even more powerful (butt feel only, no dyno chart, no witness, no conditions).
So I suggest, check for leaks first at the place where you installed your exhaust.
If there is no leak, then when you go down to PML/workshop for your next servicing, ask them to reset your ECU. If it works please buy me kopi at next meetup :)
 
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Re: All about Z4 (E89/ E86/ E85) thread

C3P0;645683 said:
Hi LondonBridge/valjean,
I had the same experience previously when I changed to aftermarket muffler.
One possible reason is due to leaks. Another reason is ECU-related. Something to do with adaptive values.
For my case, there was no leak.
So I went to reset my ECU. After that, no more loss at the low end. In fact, now the low end is even more powerful (butt feel only, no dyno chart, no witness, no conditions).
So I suggest, check for leaks first at the place where you installed your exhaust.
If there is no leak, then when you go down to PML/workshop for your next servicing, ask them to reset your ECU. If it works please buy me kopi at next meetup :)
Click to expand...

Really useful advice. Will try these options out. Thanks!
 
Re: All about Z4 (E89/ E86/ E85) thread

valjean;645702 said:
Really useful advice. Will try these options out. Thanks!
Click to expand...

Nice meeting you too! Go try reset your ECU and lemme know if it works before I get another exo and remove it :p

Thanks for the advice c3p0
 
Re: All about Z4 (E89/ E86/ E85) thread

LondonBridge;645716 said:
Thanks for the advice c3p0
Click to expand...
valjean;645702 said:
Really useful advice. Will try these options out. Thanks!
Click to expand...
No problem, I understand that LondonBridge had Remus and valjean you are on Eisenmann? I'm on Eisenmann btw.

Anway, do check out the possibility of leaks, as mentioned by RBB:

Red_Bean_Bun;643095 said:
Did you check for leaks as it would lose a bunch of low end torque ? Always wary of that as what had happened with mine .......... Had the same feeling of power loss so I decided to use another workshop to audit the work done.

Workshops behave differently when it comes to auditing another workshop's work (versus going back to the same workshop to hear lame excuses - "like its normal").

Saw black marks at the joints and using a rubber hose like a sethoscope could hear hissing / ticking sound when ramming the accelerator. Apparently a gasket was missing on one of the joints and welding was weak at another spot ......... Once fixed - power was back.
Click to expand...

Also can read up this thread, just concentrate on the few posts I mentioned will do, as the rest quite OT:
http://www.bmw-sg.com/forums/help-w...car-bit-different-after-changing-muffler.html
1) Page 1 - posts by satinGHOSTrider, Toto and Ken
2) Page 2 - first post by satinGHOSTrider.
 
Re: All about Z4 (E89/ E86/ E85) thread

C3P0;645683 said:
Hi LondonBridge/valjean,
I had the same experience previously when I changed to aftermarket muffler.
One possible reason is due to leaks. Another reason is ECU-related. Something to do with adaptive values.
For my case, there was no leak.
So I went to reset my ECU. After that, no more loss at the low end. In fact, now the low end is even more powerful (butt feel only, no dyno chart, no witness, no conditions).
So I suggest, check for leaks first at the place where you installed your exhaust.
If there is no leak, then when you go down to PML/workshop for your next servicing, ask them to reset your ECU. If it works please buy me kopi at next meetup :)
Click to expand...
Hi,

Thanks for the tips but I got a few questions on hand...

Resetting ECU as in resetting the car's adaptive learning feature? Say if I am running on a stock ECU, does it reset and relearn/reprogram the air/fuel mixture in order to optimize performance from the engine?

And if I am using a generic piggyback ECU tune (BMS Powerbox) , most probably it's tuned for a stock based setup, and would say it's pretty much a no-no for a custom set-up yeah?
 
Re: All about Z4 (E89/ E86/ E85) thread

cupholders;645836 said:
YEEEAAAHHH YOU'RE INTERIOR BEST LAAAAAA



Nice steering wheel too.... :woottt:
Click to expand...

Noted with thanks........




cheers
 
Re: All about Z4 (E89/ E86/ E85) thread

RaidenGear;645832 said:
Hi,

Thanks for the tips but I got a few questions on hand...

Resetting ECU as in resetting the car's adaptive learning feature? Say if I am running on a stock ECU, does it reset and relearn/reprogram the air/fuel mixture in order to optimize performance from the engine?

And if I am using a generic piggyback ECU tune (BMS Powerbox) , most probably it's tuned for a stock based setup, and would say it's pretty much a no-no for a custom set-up yeah?
Click to expand...

Sell your ride and go buy an M3 la. Solve all problem

MEDIC KITT
 
Re: All about Z4 (E89/ E86/ E85) thread

RaidenGear;645832 said:
Hi,

Thanks for the tips but I got a few questions on hand...

Resetting ECU as in resetting the car's adaptive learning feature? Say if I am running on a stock ECU, does it reset and relearn/reprogram the air/fuel mixture in order to optimize performance from the engine?

And if I am using a generic piggyback ECU tune (BMS Powerbox) , most probably it's tuned for a stock based setup, and would say it's pretty much a no-no for a custom set-up yeah?
Click to expand...

Resetting the adaptive learning - disconnect the battery for 20 minutes. ECU will start to relearn the high level adaptations ..........
 
Re: All about Z4 (E89/ E86/ E85) thread

RaidenGear;645832 said:
Hi,

Thanks for the tips but I got a few questions on hand...

Resetting ECU as in resetting the car's adaptive learning feature? Say if I am running on a stock ECU, does it reset and relearn/reprogram the air/fuel mixture in order to optimize performance from the engine?

And if I am using a generic piggyback ECU tune (BMS Powerbox) , most probably it's tuned for a stock based setup, and would say it's pretty much a no-no for a custom set-up yeah?
Click to expand...

Hee Hee bro, u look me too up. Maybe others can help :chinese:
 
Re: All about Z4 (E89/ E86/ E85) thread

RaidenGear;645832 said:
Hi,

Thanks for the tips but I got a few questions on hand...

Resetting ECU as in resetting the car's adaptive learning feature? Say if I am running on a stock ECU, does it reset and relearn/reprogram the air/fuel mixture in order to optimize performance from the engine?

And if I am using a generic piggyback ECU tune (BMS Powerbox) , most probably it's tuned for a stock based setup, and would say it's pretty much a no-no for a custom set-up yeah?
Click to expand...

Please update me if it work so I can order my exhaust.
 
Re: All about Z4 (E89/ E86/ E85) thread

In case anyone is still interested, I checked with Classic Auto Leather on customised car mats (the carpet type, not the 3M type):
- $80 for standard quality
- $120 for premium quality (looks/feels thicker)
Both comes with heel pad as well as spikes underneath. Seems to have a range of colours.

I probably will order a set, because my 3M-type car mat is damn irritating - keeps shifting around and for the passenger-side piece, keeps folding onto itself.

Any idea if the price is reasonable, given that our Z4 only needs 2 front pieces?
 
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Re: All about Z4 (E89/ E86/ E85) thread

Had ordered a set of Breyton GTS wheels in gunmetal, but having second thoughts now. Here are the contenders...

Breyton GTS
breyton_racegts_mg_ci3_l.jpg

A common favourite with its very aggressive, deeply concave spokes, but perhaps a tad too common for bimmers. Cheap (made in China, now going to Malaysia apparently) and heavy (~12.5kg from tirerack), but probably no heavier than stock rims.

BBS CH-R
bbs_chr_tpssl_ci3_l.jpg

Another favourite, and also fairly common on not only bimmers but other contis. Like the Breytons, the CH-R features a deep concavity, but less aggressive-looking spokes. About twice the price of the Breytons, and marginally lighter (~12kg from tirerack).

Prodrive GC-014i
01_01.jpg

Forged monoblock and very lightweight - from internet sources, only ~9.5kg! Price is about the same as the BBS, i.e. also roughly twice that of the Breytons.

Comments? :D
 
Re: All about Z4 (E89/ E86/ E85) thread

Prodrive or BBS then..........




* Prodrive for me.........
cheers
 
Re: All about Z4 (E89/ E86/ E85) thread

1. Prodrive - looks great with your white z
2. Breyton - cheap and nice!
3. BBS - BBK won't stand out

........

But since you already ordered, should just stick to breyton. Gunmetal ftw!
 
Re: All about Z4 (E89/ E86/ E85) thread

ac323;646063 said:
Prodrive or BBS then..........




* Prodrive for me.........
cheers
Click to expand...

Honestly, I'm a bit swayed towards the Prodrives now - quality over looks (they don't look bad, but not as striking as concave rims). But got to fork out double compared to the GTS (nearly $4k for the set of Prodrives in 19"). So still undecided...
 
Re: All about Z4 (E89/ E86/ E85) thread

valjean;646108 said:
Honestly, I'm a bit swayed towards the Prodrives now - quality over looks (they don't look bad, but not as striking as concave rims). But got to fork out double compared to the GTS (nearly $4k for the set of Prodrives in 19"). So still undecided...
Click to expand...


Oh i see..............................



* ok, update us then.........
cheers
 
Re: All about Z4 (E89/ E86/ E85) thread

LondonBridge;646085 said:
1. Prodrive - looks great with your white z
2. Breyton - cheap and nice!
3. BBS - BBK won't stand out

........

But since you already ordered, should just stick to breyton. Gunmetal ftw!
Click to expand...

Bro, that is good advice - Breyton is cheap and good!

PS: Prodrives also come in a very nice shade of British Black...
 
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