Hi all I'm new to the world of mod cons I've recently enquired about having z remapped it's a 2.5 se 54 plate with 80,000 miles I was told it would increase bhp from 194-210 and torque 245- 275 5% increase fuel has anyone had this done and when you hit sport button do you still get a boost after remapp fitted
remapping
- Thread starter macsbm
- Start date
most performance mods are pointless. better off buying a faster car (3 litre).
the 3 litre comes with uprated parts, brakes, cooling, LSD, etc.
all you would be doing is increasing wear and tear on the car as well as minimal gains, the higher the gains the more wear and tear. the car was mapped by BMW as safe. by re-mapping your going against what the experts recommend for that car.
the 3 litre comes with uprated parts, brakes, cooling, LSD, etc.
all you would be doing is increasing wear and tear on the car as well as minimal gains, the higher the gains the more wear and tear. the car was mapped by BMW as safe. by re-mapping your going against what the experts recommend for that car.
A remap is never going to give too much gain on a naturally aspirated engine, but I had my 3.0 done years ago,and it did add take it form 232bhp to 255 bhp,along with only a k & N filter and remap.
As for the sport button,it did still add something,but not as noticeable a difference after remap,between sport button on and off,as without remap.Worth doing,if only spending around £400 or less to do
Only the m's have a limited slip diff as standard,sonny....was never on the 3.0's,unfortunately.
As for the sport button,it did still add something,but not as noticeable a difference after remap,between sport button on and off,as without remap.Worth doing,if only spending around £400 or less to do
Only the m's have a limited slip diff as standard,sonny....was never on the 3.0's,unfortunately.
Remapping a normally aspirated car doesn't add much - as has been mentioned already. I did it to a Golf V6 4motion years ago and it added about 20bhp .... it just made it feel a bit fresher and though it had a few more miles on it - as in a bit looser. I didn't regret it and knew it wouldn't make much. Turbo cars on the other hand ... !
It can 'refresh' your feeling of the car a bit but I would get it done with a rolling road before and after so you can see what it has done - I guess it depends where you are considering doing it.
I have seen (in MB models) a company called Rebellion who rolling road, remap, rolling road after the map and then use Terraclean before rolling roading again. I am dubious re Terraclean but their results on higher mileage cars show a remap and clean out using this product does make a decent difference (as in the remap and then separately the Terraclean). Maybe something like that with a clean out would make it even better ? Depends what you want to spend for small gains.
It can 'refresh' your feeling of the car a bit but I would get it done with a rolling road before and after so you can see what it has done - I guess it depends where you are considering doing it.
I have seen (in MB models) a company called Rebellion who rolling road, remap, rolling road after the map and then use Terraclean before rolling roading again. I am dubious re Terraclean but their results on higher mileage cars show a remap and clean out using this product does make a decent difference (as in the remap and then separately the Terraclean). Maybe something like that with a clean out would make it even better ? Depends what you want to spend for small gains.
craig3.2 said:A remap is never going to give too much gain on a naturally aspirated engine, but I had my 3.0 done years ago,and it did add take it form 232bhp to 255 bhp,along with only a k & N filter and remap.
As for the sport button,it did still add something,but not as noticeable a difference after remap,between sport button on and off,as without remap.Worth doing,if only spending around £400 or less to do
Only the m's have a limited slip diff as standard,sonny....was never on the 3.0's,unfortunately.
Arggh your right. Well at least the 3 litres came with the bigger brakes, etc to handle the power.
Are K and N filters worth buying? So much conflicting advice on those. Some say they are worse, some say they are no better than stock, etc.
I also think 23 bhp on a 3.0 litre (if it was actually 10% you never know with marketing these days) means he will get about 15bhp at best on a smaller engine. I don't think it's worth doing for 5-15 bhp extra. Was yours checked on a rolling road after or was it just a plug and play map with no rolling road involved craig?
I'd also never advise doing it on a auto box it's just not worth the potential risks. The only mods worth doing are mainly cosmetic mods. Upgraded internal/external lights. Stubby aerial. New exhaust tips. Relocating the roof motor. New DISA valve. Replace Vanos seals. It's never worth chasing more performance the law of diminishing returns is mighty, plus your insurance increase, etc means it's simply not worth it.
Turbo'ing the car is also money you will never get back and such an expensive job to do properly that you could probably upgrade to an M instead.
Your best option really is to buy a 3 litre.
Out of interest why would you not recommend remapping an auto?
mr.tourette said:
more power equals more stress on the transmission.
automatic transmissions aren't cheap to fix. it's just not worth it. if you want more power you should have bought the more powerful car that's built to handle it all.
in our manual car i floor it in any gear. in the automatic i only do so in 3rd-5th
SonnyA85 said:
Unfortunately that is a load of nonsense.. The auto boxes used in the Z are easily capable of handling 10-15% more power/torque..
Mike
synthedup said:
glad it wasn't just me thinking it was a bit of an odd statement
Yup..
In fact the ONLY reason I'm not remapping mine, is the £ per BHP return is not worth doing, even on the 3.0L
Mike
In fact the ONLY reason I'm not remapping mine, is the £ per BHP return is not worth doing, even on the 3.0L
Mike
SonnyA85 said:craig3.2 said:A remap is never going to give too much gain on a naturally aspirated engine, but I had my 3.0 done years ago,and it did take it from 232bhp to 255 bhp,along with only a k & N filter and remap.
As for the sport button,it did still add something,but not as noticeable a difference after remap,between sport button on and off,as without remap.Worth doing,if only spending around £400 or less to do
Only the m's have a limited slip diff as standard,sonny....was never on the 3.0's,unfortunately.
Arggh your right. Well at least the 3 litres came with the bigger brakes, etc to handle the power.
Are K and N filters worth buying? So much conflicting advice on those. Some say they are worse, some say they are no better than stock, etc.
I also think 23 bhp on a 3.0 litre (if it was actually 10% you never know with marketing these days) means he will get about 15bhp at best on a smaller engine. I don't think it's worth doing for 5-15 bhp extra. Was yours checked on a rolling road after or was it just a plug and play map with no rolling road involved craig?
I'd also never advise doing it on a auto box it's just not worth the potential risks. The only mods worth doing are mainly cosmetic mods. Upgraded internal/external lights. Stubby aerial. New exhaust tips. Relocating the roof motor. New DISA valve. Replace Vanos seals. It's never worth chasing more performance the law of diminishing returns is mighty, plus your insurance increase, etc means it's simply not worth it.
Turbo'ing the car is also money you will never get back and such an expensive job to do properly that you could probably upgrade to an M instead.
Your best option really is to buy a 3 litre.
The remap was by a powertune,the car was rolling roaded independently from this,before and after,with the k N filter already ftd by me,and they have as many good reviews as bad(k N filters),so my bhp figures were as accurate as can be.
Please don't bother remapping a stock NA BMW, tuners claims are total rubbish. I've been to many an independent rolling road day with remapped NA cars and the only gains are ever on cars with terrible stock software, major engine mods or 2hp as a result of an RPM up lift. Open air filters like K&N Wil reduce power as they'll be sucking in warm air.
If you look at the plugs and/or an AFR graph, you can see that BMW did a good job and the engine is running at it's best. If you want more, treat it to more oil changes.
If you look at the plugs and/or an AFR graph, you can see that BMW did a good job and the engine is running at it's best. If you want more, treat it to more oil changes.
Paulwirral
Active member
Re mappers magic 2 words are "up to" remember them and you have no reason to be disappointed :lol:
pokeybritches
Member
You can potentially expect 5 hp from a mail order tune, from a good tuner, on a naturally aspirated engine with no other hardware mods. if you've swapped to catless headers, then you might see more, but the car's stock software should adapt.
Tunes are more important with forced induction or major hardware changes. Personally, I only consider dyno tuning.
A better way to spend money is on a swapped final drive ratio. You can get the whole differential for a few hundred dollars off a junkyard car, and then expect to pay 3-5 hours for labor if you don't do the work yourself. Another power adder are catless headers, but you will need a way around emissions testing. I relocated my catalytic converters further downstream so that I still get good exhaust scavenging, and the high flow metallic cores aren't as restrictive as the OEM cats. Either will net big performance gains, although an optimized final drive just makes better use of what you already have.
With the exception of a swapped final drive and catless headers, big performance gains cost big money. 10% more horsepower on a stock naturally aspirated BMW engine is a pipe dream.
Tunes are more important with forced induction or major hardware changes. Personally, I only consider dyno tuning.
A better way to spend money is on a swapped final drive ratio. You can get the whole differential for a few hundred dollars off a junkyard car, and then expect to pay 3-5 hours for labor if you don't do the work yourself. Another power adder are catless headers, but you will need a way around emissions testing. I relocated my catalytic converters further downstream so that I still get good exhaust scavenging, and the high flow metallic cores aren't as restrictive as the OEM cats. Either will net big performance gains, although an optimized final drive just makes better use of what you already have.
With the exception of a swapped final drive and catless headers, big performance gains cost big money. 10% more horsepower on a stock naturally aspirated BMW engine is a pipe dream.
I've found over the years you usually get all the negatives reviews from people who never remaped a car. I've never known people to say I had my car returned to normal oem map because the custom remap was was not worth it. Obviously their are some bad tuners only after your money who give the rest a bad name. If its done properly I see it as a little mini brain check up which benefits the ECU. Over time the oem map will gain flat spots in the rpm curve so a custom remap will remove these. This is why many experience overall better torque/bhp gains and the car feels more lively to drive. The car will also benefit from better MPG after too so remaping makes the car more efficient. A lot will say its not worth it because all their looking at is max power gains. Usually just to brag about which was a quick ECU flash for a few hundred pound worth doing. Their not actually interested in what the car is doing below the new curve line on dyno. No one drives at max bhp/torque the car would destroy itself so its the info below the curve which is important in tuning. The results are like night and day really saying its not worth it is just wrong. We even remap our work vans now to save the company Co2 tax on our fleets. Remaping is a good thing even if you only gained 5 bhp its still 5 bhp more isn't it ?. I've owned 3 previous bmw's all petrol and all were remaped. I wont be having the eco blend map this time though I will be getting the full aggressive remap done Jason sells at BW chiptune. You actually loose a couple mpg with this map but its worth it. Bhp gains should go form approx. 230bhp to 250+bhp with about 260-280lb torque it's the increased torque from earlier in the rpm range which makes the biggest transformation felt when driving the car. It will be £300 well spent in my eyes and I will continue remaping petrol bmw's
