Re mapping

M

MTB Phil

Member
Good afternoon,

I have a 2004 2.2, just after a bit of extra punch, I have seen online that a company called Quantum remap the on board computer and this will give a boost of 17 bhp, bringing the power very nearly up to a 2.5, the torque is also improved. Does anyone have any first hand experience of this please. The cost is only £249, so I must admit, I am very tempted.

Regards

Phil
 
imo if you want more power get 2.5 or 3.0 :)

as above, I wouldn't bother on NA engine.
 
17bhp my arse! 2 or 3 at best. Certainly not something you will notice. Save your £250 for something worthwhile.
 
I agree that your best bet is to go for the 3 litre, however I used a Quantum re-map on my 3.0 for a claimed 9% gain.
No dyno runs so can't back that up with data, but it definitely felt more urgent and greater torque after (claimed 265 to 280ish bhp).
If you have a spare half hour you can read my journey from making the decision through to the driving feel afterwards: http://www.z4-forum.com/forum/viewtopic.php?f=2&t=82745&hilit=quantum+remap
 
Marlon said:
I agree that your best bet is to go for the 3 litre, however I used a Quantum re-map on my 3.0 for a claimed 9% gain.
No dyno runs so can't back that up with data, but it definitely felt more urgent and greater torque after (claimed 265 to 280ish bhp).
If you have a spare half hour you can read my journey from making the decision through to the driving feel afterwards: http://www.z4-forum.com/forum/viewtopic.php?f=2&t=82745&hilit=quantum+remap
Click to expand...

A well known trick is for them to simply change the throttle mapping in a similar way to what pressing the sport button does, which does make the car feel more urgent. I think there are often improvements to be had in terms of drive-ability and playing around with VANOS timing can shift the torque curve around a little which can make the car feel quite different in terms of delivery. Maybe those are enough justification for some people, but in terms of overall power gains remaps on modern n/a cars are very limited indeed.
 
^ Agree, If BMW's programming team are outdone in terms of SAFE performance and economy etc by some random 3rd party spamming out maps for 100's of cars then I don't think their bosses would be too pleased.

Like induction kits, Anyone remember Revs Magazine, every page splattered with adverts with them claiming 10% (yes 10% not 10BHP) for installing a poverty spec K&N Filter. All we ever got on our N/A Astra's was heat soak and crap economy.

Then Exhausts... Magnex exhausts anyone? I swear they choked my Rover 220 Turbo to death.

Anyway OT, 99% of the time on an NA engine they are a waste of time. Exceptions being NA RenaultSport Engines but exclusively limited to the RSTuner by Fastchip. They transform the car outright and stop it kangarooing down the road in the morning and iron out the rev range a touch. Superchips etc are largely a waste.

More OT, Buy a 2.5i for near half the cost (they are actually a lot cheaper than good 3.0s) and Supercharge it for £4.5k. for £7-8k you'll have a pretty monstrous motor.
 
I've been considering a remap for a while now...but now I am unsure. Apart from a supercharge (which is way out of my budget) what other mods can I make to increase power? I've done the K&N air filter and added a custom back box. I've got the 3.0si
 
idej_jedi said:
I've been considering a remap for a while now...but now I am unsure. Apart from a supercharge (which is way out of my budget) what other mods can I make to increase power? I've done the K&N air filter and added a custom back box. I've got the 3.0si
Click to expand...

defo consider a remap - the N52 seems to be one of the few NA engines which respond well to a map. I had my 2.5i (177bhp) mapped to 200 bhp! Which I was astonished at.
 
idej_jedi said:
I've been considering a remap for a while now...but now I am unsure. Apart from a supercharge (which is way out of my budget) what other mods can I make to increase power? I've done the K&N air filter and added a custom back box. I've got the 3.0si
Click to expand...

As said - Quantum remap for £299, you will feel a difference and it won't break the bank :thumbsup: :driving:
 
jamie_z4 said:
idej_jedi said:
I've been considering a remap for a while now...but now I am unsure. Apart from a supercharge (which is way out of my budget) what other mods can I make to increase power? I've done the K&N air filter and added a custom back box. I've got the 3.0si
Click to expand...

defo consider a remap - the N52 seems to be one of the few NA engines which respond well to a map. I had my 2.5i (177bhp) mapped to 200 bhp! Which I was astonished at.
Click to expand...

Cheers J. :thumbsup:
 
I have remapped a fair few of these n/a bmw engines now, Done a z4m recently and while it won't give you turbo levels of gains it still makes a nice difference on an n/a engine. 20bhp is still noticeable on a relatively small and light car. :thumbsup:
 
Monkeydonkeyratmagic said:
^ Agree, If BMW's programming team are outdone in terms of SAFE performance and economy etc by some random 3rd party spamming out maps for 100's of cars then I don't think their bosses would be too pleased.
Click to expand...

The point you are missing here is that BMW do not and did not design the engines for maximum SAFE power output they design the engine then map it to fit with a specific emissions profile hence gains are able to be made at the cost of increased CO output from the exhaust which lets be honest none of us can really care that much about or else we'd all be in the prius forum instead...

As a side note I spoke to Rob before he did the remap on Marlon's si and he told me that whilst there would definitely be a power increase it would only be just under 10% and actually the most noticeable gain from the Quantum remap for this specific engine ECU combo came from the removal of flat spots and tweaking the pedal response, this was obviously relayed onto Colin prior to him booking it in and as he mentioned above he was happy with the result
 
The old adage, for NA engines at least. "If you what a faster car, buy a faster car", is easy to apply in this case. If the OP was driving a 3.0 ltr already, then a tuneup makes more sense. For Zeds with less displacement, unless you really love your individual Zed, then swap it out for a faster one. :thumbsup:
 
jamie_z4 said:
defo consider a remap - the N52 seems to be one of the few NA engines which respond well to a map. I had my 2.5i (177bhp) mapped to 200 bhp! Which I was astonished at.
Click to expand...

Actually from what I can make out the facelift 2.5i is the only E85 engine that does respond well to a remap. Probably because the 2.5Si was pretty much the same engine but rated at 218bhp - I'm guessing because of BMWs original mapping!

As Marlon said you might get 15 bhp on a 3.0Si, but if they are required then why not? :(
 
I will probably get my nasp 3.0 N52 mapped in the foreseeable future; mainly for the removal of flat spots, improved engine response and the ability to turn off all the DSC nonsense whilst also engaging sport mode.
 
PinkPineapple44 said:
I will probably get my nasp 3.0 N52 mapped in the foreseeable future; mainly for the removal of flat spots, improved engine response and the ability to turn off all the DSC nonsense whilst also engaging sport mode.
Click to expand...

Seriously, don't waste your £... If your car has flat spots a "remap" will probably exaggerate them. Find the problem rather than try and have it mapped out.

Mike
 
Totally different question, and maybe one for another thread, but I'm planning to put the Z on a rolling road to see how many horses have escaped...is there anything that can be done to get lost horses back?

Once the Z isn't a daily anymore (next winter) then weight shedding will be my main focus for extra speed. :driving:
 
The only reason it could be down on power would be things like:

Blocked filters
Low quality fuel
Worn plugs
Low compression
Air leaks etc

If you have no fault codes stored, are on top of the servicing and use super unleaded there is no reason for it to be down on power.
 
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