Need Advice: Reflash, Unichip or leave it alone?

878

Well-Known Member
Hi all mod masters,

I need some reliable 3rd party advice to swing the vote for me which of the titled 3 options should i opt for my car.

Case background:
I drive an E46 330 PFL and have been upping the mods here and there over the past 2+ years i've had the car. I left ECU untouched till all physical mods have been completed to my satisfaction because it didn't make sense to alter the ECU while i was still in the modding phase. Alas, i seem to have come to the end of my modding project and the final step naturally would be the ECU.

My view is that ECU management is as much about optimising the performance of the combination of the after-market parts with the car, as it is about squeezing out more power. I can't help but feel that the car is not performing at its optimal, even though with the new parts, there is visible power increase & enhanced performance. This is due to my understanding that the ECU is still "thinking" that it's a stock car with stock parts. Even if ECU is able to adapt, it's still not optimal.

The 2 schools of ECU management would obviously be to either reflash or piggyback.

1. Reflash option is kinda out for me because 2 trips to Rhommel failed to have his PC communicate with my ECU. "Can't detect your ECU", he says. Disappointed yes, but on second thoughts, i don't know how long i would be keeping the car, and the moolah spent would naturally go down the drain - unlike other after market parts which can find a 2nd owner. The reflashed ECU would also be useless to the next owner if i choose to demod.

2. Unichip has been garnering rather good reviews, but i heard that there are perimeters that cannot be accessed/altered (compared to flashing), plus of course, it's a piggyback after all so there will certainly be limitations. Plus side is that it's portable, able to move to my next car, or even resellable. Good tuner is also not easy to come by, no?

3. The final option is to leave it alone. Deal with the loss of potential power (can't miss what you don't know!) and hope that ECU don't go crazy on me later on.

Mods that i've done that affects ECU management:
- Gruppe M
- Supersprint cat-back
- pulleys
- technik cams

mods that may or may not affect ECU management:
- Coil/Sprint booster/IVAC
- Volkers & Ignition Coil upgrade (?)

Since the reflashing option is kinda out, it's actually a tie between Unichipping or leaving it alone. Any suggestions from all modders are very welcome!

Thanks!
 
Re: Need Advice: Reflash, Unichip or leave it alone?

Subscribed....
 
Re: Need Advice: Reflash, Unichip or leave it alone?

rhommel can't do it? wow! that's a first...

have to tried talking to j4c? they have a hiop reflash that's been working wonders for my car, considering it's a 4-potter. and it's relatively less expensive - considering the number of e46 left on the road than before.

go have a chat with seetoh aka snowdog. you'd be surprised how many horses and lb/ft you can find from your 3L lump.
 
Re: Need Advice: Reflash, Unichip or leave it alone?

Rhommel can't do anything when my car refuses to cooperate by disclosing it's ID/serial/MAP/or whatever is necessary information for him to work on it.
Not a big fan of hiop's software, not that it's no good, but i've gotten not so happening feedback from previous HIOP users. But like i said, the dollar vs gain vs portability isn't in my favour since i really can't tell long i'll be keeping the car.
 
Re: Need Advice: Reflash, Unichip or leave it alone?

Get a reflash to max out the potentials. Piggybacks rely a lot on the aftersales tuning. Seen quite a few unhappy stories.
 
Re: Need Advice: Reflash, Unichip or leave it alone?

which ECU version is in your car? MS43, MS45, MS45.1?

what cam profiles are you running?
 
Re: Need Advice: Reflash, Unichip or leave it alone?

woah, i won't know which ecu i'm running wor.... is nov 02 m54 3.0, dono which one isit. how to tell? i guess that was what rhommel attempted to find out on both attempts but "can't read"....

cams is likely to be the 264/248 ones since that's the only one for NA, the others seem to be for FI.
 
Re: Need Advice: Reflash, Unichip or leave it alone?

878;420895 said:
woah, i won't know which ecu i'm running wor.... is nov 02 m54 3.0, dono which one isit. how to tell? i guess that was what rhommel attempted to find out on both attempts but "can't read"....

cams is likely to be the 264/248 ones since that's the only one for NA, the others seem to be for FI.

might be a MS43 or MS45, its actually printed on the ECU unit itself. pretty sure that's not what he was trying to find out. in any case, no harm asking PML if there is an ECU update available for your car and get it reflashed before heading back to rhommel again. Might be a physical fault with the ecu or perhaps a software issue as well.

worst case scenario, you can go with motec.....
 
Re: Need Advice: Reflash, Unichip or leave it alone?

mmm.... sounds like a good suggestion. will do just that. thanks!
 
Re: Need Advice: Reflash, Unichip or leave it alone?

hahaha.... heli in workshop. crashed too much need engine overhaul liao so now attention diverted back to car loh....
 
Re: Need Advice: Reflash, Unichip or leave it alone?

Mine's a dec02 M54 3.0L, got it tuned by Rhommel previously, no prob reading the ECU leh....
 
Re: Need Advice: Reflash, Unichip or leave it alone?

i have absolutely no doubt that rhommel's probably tuned dozens of e46s of all different types with many happy results in the past. i'm certain it's not his prob. it's mine..... maybe my car's telling me "enough is enough"! lol

to have pml reflash/update's gona cost $$$ i heard. plus there isn't anything really wrong to start off with. guess my next best option is unichipping it liao..... haiz.

thanks for all your kind contributions and advices though! gona try to make appt with guni liao.

p.s. not many e46 reviews for unichip though.... noticed plenty of 36s and an odd e90s here and there. wonder why..... (maybe coz all's gone the reflash route already?)
 
Re: Need Advice: Reflash, Unichip or leave it alone?

878;422034 said:
i have absolutely no doubt that rhommel's probably tuned dozens of e46s of all different types with many happy results in the past. i'm certain it's not his prob. it's mine..... maybe my car's telling me "enough is enough"! lol

to have pml reflash/update's gona cost $$$ i heard. plus there isn't anything really wrong to start off with. guess my next best option is unichipping it liao..... haiz.

thanks for all your kind contributions and advices though! gona try to make appt with guni liao.

p.s. not many e46 reviews for unichip though.... noticed plenty of 36s and an odd e90s here and there. wonder why..... (maybe coz all's gone the reflash route already?)


Hi Bro,

Let me know if you have not found a unichip tuner yet. I specialise in unichip install and tune. Let me know if you are interested. I can be contacted at 98590800.

Thanks and best regards
 
Re: Need Advice: Reflash, Unichip or leave it alone?

Are you joe? Cause i've not heard of anyone in SG who specialise in unchip tunning especially for bmw.
 
Re: Need Advice: Reflash, Unichip or leave it alone?

SC_IS;431320 said:
Are you joe? Cause i've not heard of anyone in SG who specialise in unchip tunning especially for bmw.

Hi there,

this is Andrew. I basically specialise in unichip and have done some BMWs. Unichip's current platform can be used on a wide range of makes and models. I have also installed and tuned many other makes and models too. Pls let me know if anyone is interested in installing Unichip on your car to maximise the performance of your engine.

Cheers!
 
Re: Need Advice: Reflash, Unichip or leave it alone?

Hi Andrew,

May i koe can it be done for E87, and how much is the cost and up by how many horssssssse? Thks.
 
Re: Need Advice: Reflash, Unichip or leave it alone?

Tig@r;433725 said:
Hi Andrew,

May i koe can it be done for E87, and how much is the cost and up by how many horssssssse? Thks.

Hi there,

yes, unichip can be installed on the E87. May I know which version E87 are you driving?

Thanks
 
Re: Need Advice: Reflash, Unichip or leave it alone?

no e46 with unichip dynoed b4 to see the actual gains ?
 
Re: Need Advice: Reflash, Unichip or leave it alone?

andrewvtw;433739 said:
Hi there,

yes, unichip can be installed on the E87. May I know which version E87 are you driving?

Thanks

Hi,

I get my E87 tis yr in Feb 09. I'm quite new to bimmer and not sure of the version. Mayb u can advise on tis. Thk u 4 ur fast reply and paiseh for my late respond.
 

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