Z3M MAC Airbox now fitted an setup!
Discussion
Hi,
Just in case anyone is interested am posting some pics and vids of the MAC Motoren ZM Airbox with no MAF now fitted to my car:
And some vids:
http://www.youtube.com/watch?v=wesSLHbWYbE
http://www.youtube.com/watch?v=f9riDSU9o60
http://www.youtube.com/watch?v=Vie6rIjUM5E
http://www.youtube.com/watch?v=DVLgy21yzek
Its making very good power and has great low rpm driveability. Plus stonking top end!!
Jason
Just in case anyone is interested am posting some pics and vids of the MAC Motoren ZM Airbox with no MAF now fitted to my car:
And some vids:
http://www.youtube.com/watch?v=wesSLHbWYbE
http://www.youtube.com/watch?v=f9riDSU9o60
http://www.youtube.com/watch?v=Vie6rIjUM5E
http://www.youtube.com/watch?v=DVLgy21yzek
Its making very good power and has great low rpm driveability. Plus stonking top end!!
Jason
Edited by zmrjason on Sunday 27th April 22:25
and what back wheels Hp did you achive? I have just made my own air box !! similar to that dave f thingy.... However I have running probs at the moment its either a new MAF os something to do with my lamba sensors if it has any !!Guys,
Not sure what the benefits of removing the MAF are, more tuneability I think! The overall results are impressive though.
All I can say is it runs a dream and has given a decent hike in power and torque from 3000rpm. It IS a good deal quicker than it was before and infact the low end driveablity is improved. Also l am getting about 185 to the tank since installation I have done about 500miles including 2 hours of first gear stop start stuff in London without problem. Apologies my technical knowledge is not all that, just giving a drivers perspective!
Anything more technical you would need to speak to the folk who did the work, it did take a LOT of careful setup/mapping though.
PM me if you are interested.
Not sure what the benefits of removing the MAF are, more tuneability I think! The overall results are impressive though.
All I can say is it runs a dream and has given a decent hike in power and torque from 3000rpm. It IS a good deal quicker than it was before and infact the low end driveablity is improved. Also l am getting about 185 to the tank since installation I have done about 500miles including 2 hours of first gear stop start stuff in London without problem. Apologies my technical knowledge is not all that, just giving a drivers perspective!
Anything more technical you would need to speak to the folk who did the work, it did take a LOT of careful setup/mapping though.
PM me if you are interested.
that airbox looks stunning. The finish on it looks OEM.
Your car gets better everytime!
Do you feel that yor mid range and low down is a bit weaker/lumpy at times compared to the stock box ? ?
the finish and design of that airbox alone for me would be worth the price !
But the main point of a C/F airbox / Alpha N / Motec is the setup of the map and the mapping , if its done properly the cars a beast if not it will lose power and driveability.
Once again Jason beautiful car with great mods !!! hopefully get to see it in the future at a meet !
Your car gets better everytime!
Do you feel that yor mid range and low down is a bit weaker/lumpy at times compared to the stock box ? ?
the finish and design of that airbox alone for me would be worth the price !
But the main point of a C/F airbox / Alpha N / Motec is the setup of the map and the mapping , if its done properly the cars a beast if not it will lose power and driveability.
Once again Jason beautiful car with great mods !!! hopefully get to see it in the future at a meet !
Guys,
Thanks for the compliments!!
The Airbox is very very well made and certainly looks OEM fitment IMHO. It is running Alpha – N and took a lot of fine tuning to get to run as well as it does now.
I have deliberately been running the car daily for my commute and have spent many hours in stop start traffic in central London. The low rpm running is very smooth, better than before actually, I think again testament to how much time was spent mapping it correctly.
As far as low down drive is concerned it is not at all lumpy, as stated above the low rpm driveability on a light throttle is improved. You are aware though that there is a very different engine under the bonnet because throttle response is instant and brutal the more and more rpm you have dialled in. From 3000rpm there is a substantial amount more shove than a standard 3.2 Evo. Once over 4500rpm it transforms into a bit of a monster and just rips right to an indicated 8250rpm producing max power at just under 8000rpm. Max Torque is also available throughout most of the midrange all the way to the top of the rev range.
As can be seen from the dyno sheet it is making just over 350bhp with a solid 280ft/lbs. On road with constant and cooler air intake temperatures we reckon the figures are better still. Either way the car is now a bit of a beast and the retro fitting of Racelogic TC complements the whole package very well indeed, the grip and progressive nature that it allows slip is outstanding.
I was a little concerned that this conversion would be one step too far. As it turns out it has improved the car dramatically (powerwise) and had no detrimental effect on driveability. Still getting about 190ish to a thankful. In fact sat there this morning in the pouring rain with the windows up, air-con on an the heated seats turned on with the Racelogic turned to 0% slip was an absolute pleasure an I could’ve driven many a mile without complaint.
As far a mapping is concerned - www.evolveyourcar.com - did all fitting and setup work. So all credit to them really!
Hopefully meet some of you at a meet sometime!
Jason
Thanks for the compliments!!
The Airbox is very very well made and certainly looks OEM fitment IMHO. It is running Alpha – N and took a lot of fine tuning to get to run as well as it does now.
I have deliberately been running the car daily for my commute and have spent many hours in stop start traffic in central London. The low rpm running is very smooth, better than before actually, I think again testament to how much time was spent mapping it correctly.
As far as low down drive is concerned it is not at all lumpy, as stated above the low rpm driveability on a light throttle is improved. You are aware though that there is a very different engine under the bonnet because throttle response is instant and brutal the more and more rpm you have dialled in. From 3000rpm there is a substantial amount more shove than a standard 3.2 Evo. Once over 4500rpm it transforms into a bit of a monster and just rips right to an indicated 8250rpm producing max power at just under 8000rpm. Max Torque is also available throughout most of the midrange all the way to the top of the rev range.
As can be seen from the dyno sheet it is making just over 350bhp with a solid 280ft/lbs. On road with constant and cooler air intake temperatures we reckon the figures are better still. Either way the car is now a bit of a beast and the retro fitting of Racelogic TC complements the whole package very well indeed, the grip and progressive nature that it allows slip is outstanding.
I was a little concerned that this conversion would be one step too far. As it turns out it has improved the car dramatically (powerwise) and had no detrimental effect on driveability. Still getting about 190ish to a thankful. In fact sat there this morning in the pouring rain with the windows up, air-con on an the heated seats turned on with the Racelogic turned to 0% slip was an absolute pleasure an I could’ve driven many a mile without complaint.
As far a mapping is concerned - www.evolveyourcar.com - did all fitting and setup work. So all credit to them really!
Hopefully meet some of you at a meet sometime!
Jason
The airbox certainly looks good & the videos show it sounds great. I'd be interested to see the results of the mapping to see how well those airboxes perform versus the more traditional motorsport. I woudl imagine a big part of the pull up the rev range is cam related though.
So what electronics have been fitted to enable the mapping? I get the impression you retained the BMW ecu.
Nice Car....
So what electronics have been fitted to enable the mapping? I get the impression you retained the BMW ecu.
Nice Car....
C5L said:
HoulbT it makes 350, which is amazing !!!
Im sure you have a strong evo engine too no, did you not detune your engine ? thats crazy !!
We've made the decision to detune the race car as it too powerful for the Kumho championship yes. We end up carrying ballast which puts us on a par with everyone under acceleration but at a disadvantage under cornering/braking.Im sure you have a strong evo engine too no, did you not detune your engine ? thats crazy !!
The race car runs a devanos with 296 cams & airbox. It made 303 at the wheels when benchmarked (an honest measure of power as oppose to flywheel figures imho) and we thought we had trimmed a bit off the top then. We'll be looking to reduce the power by around 20bhp but retain the torque this month.
.
Edited by houlbt on Wednesday 30th April 10:00
Thanks, I know the car has been to BMsport more than once in the past. I only asked becuase I am trying to understand the power gains and put them in context. Don't think there are many examples of these cars making in excess of 350bhp.
Internal volume of an airbox is just one small part of engine intake science but really it's about airflow and the transient nature of this within the airbox when coupled to a breathing engine. The inlet trumpets generate changing airflow within airboxes and are sensitive to many aspects of airbox geometry.
And I don't confess to know much about all this.... I'm in finance (well of sorts)
Internal volume of an airbox is just one small part of engine intake science but really it's about airflow and the transient nature of this within the airbox when coupled to a breathing engine. The inlet trumpets generate changing airflow within airboxes and are sensitive to many aspects of airbox geometry.
And I don't confess to know much about all this.... I'm in finance (well of sorts)
Edited by houlbt on Wednesday 30th April 13:03
Houlbt,
Cheers for the comments!
Well the car is making over 300bhp at the wheels which I am very happy with. The injectors are standard items and fuel perfectly. Although we thought we needed bigger injectors actually with careful adjustment they were not necessary. The dip/flat spot at the top of the rev range previously was actually due to overfuelling NOT underfuelling, as proven now I have no flat spot at all and a screaming top end that builds and builds with no dips right up to the limiter.
As far as mapping is concerned it still has the standard ecu with no MAF and is running Alpha-N. It has taken a while to get just right but now this car pulls from low rpm stronger than standard without complaint. It is quite happy in fourth/fifth gear at 1500rpm cruising along the road and pulls smoothly with more torque than standard at this level, however if you give it 100% throttle at 1500rpm in fourth/fifth then it will complain! However you need a diesel turbo to pull top gear at that sort of rpm so am not bothered by that. I have used this car daily this week to test its driveability and it is faultless.
I do know the airbox you are referring to and there are quite a few differences between them. The MAC has a larger internal volume I believe, has a bigger filter CSL style in front of the trumpets and it utilises the standard 3.2 Evo Trumpets which seems to work very well. Also IMHO it is of better quality.
Hope that is of use!
Must say the Race cars are looking good mate......
Cheers
Jason
Cheers for the comments!
Well the car is making over 300bhp at the wheels which I am very happy with. The injectors are standard items and fuel perfectly. Although we thought we needed bigger injectors actually with careful adjustment they were not necessary. The dip/flat spot at the top of the rev range previously was actually due to overfuelling NOT underfuelling, as proven now I have no flat spot at all and a screaming top end that builds and builds with no dips right up to the limiter.
As far as mapping is concerned it still has the standard ecu with no MAF and is running Alpha-N. It has taken a while to get just right but now this car pulls from low rpm stronger than standard without complaint. It is quite happy in fourth/fifth gear at 1500rpm cruising along the road and pulls smoothly with more torque than standard at this level, however if you give it 100% throttle at 1500rpm in fourth/fifth then it will complain! However you need a diesel turbo to pull top gear at that sort of rpm so am not bothered by that. I have used this car daily this week to test its driveability and it is faultless.
I do know the airbox you are referring to and there are quite a few differences between them. The MAC has a larger internal volume I believe, has a bigger filter CSL style in front of the trumpets and it utilises the standard 3.2 Evo Trumpets which seems to work very well. Also IMHO it is of better quality.
Hope that is of use!
Must say the Race cars are looking good mate......
Cheers
Jason
houlbt said:
Thanks, I know the car has been to BMsport more than once in the past. I only asked becuase I am trying to understand the power gains and put them in context. Don't think there are many examples of these cars making in excess of 350bhp.
Internal volume of an airbox is just one small part of engine intake science but really it's about airflow and the transient nature of this within the airbox when coupled to a breathing engine. The inlet trumpets generate changing airflow within airboxes and are sensitive to many aspects of airbox geometry.
Your right, there aren't many examples of S50's running this sort of power. There could be alot more if engines were setup correctly and mapped properly. There are a fair few S50's running Schrick cams with mapping which is quite different to what it should be both in terms of ignition timing and fuelling.Internal volume of an airbox is just one small part of engine intake science but really it's about airflow and the transient nature of this within the airbox when coupled to a breathing engine. The inlet trumpets generate changing airflow within airboxes and are sensitive to many aspects of airbox geometry.
Edited by houlbt on Wednesday 30th April 13:03
MAC have abviously got it right with this airbox and it seems that they have put work into developing it.
btw.....I'm liking the new grey finish on the race car!
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