Eventuri VAI Carbon Intake Kit for the Z4M details

Z4M-2006 said:
So was it particularly hot, humid or have low tyre pressure on the day?

I can see poor fuel backing down the timing I guess...

How was the test operated I the day Stephen? 3 runs with and without intake and an average taken, or 2 maximum power runs ?
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Was 4 runs without and 4 with and average taken.

Well it was raining, so presumably a low ambient pressure, haven't checked tyre pressures for a few weeks mind, so can't comment, but certainly not over inflated.

Anyway, I guess the point trying to be made is that it's the difference between the two runs that is important not the overall figure.
 
To test whether any air-intake has any effect (positive or negative) on performance of a car in "real world" driving conditions is now dead easy. Get yourself a bluetooth OBD II adapter for around a fiver off ebay and use it in conjunction with an OBD app for an android device ( Torque app - free) and then simultaneously record 1. Airflow through MAF, 2. engine RPM, 3. Vehicle speed and 4. Intake Air Temperature. If you record these 4 parameters for "before and after" runs in 3rd gear accelerations from a rolling start from 2000rpm to the redline and save the files in .csv format, you can then compare the results in an Excel spreadsheet. If you see a significant increase in the airflow through the MAF at a given RPM, then this wil translate into an increased power output by the engine. Alternatively, if you look at the timestamp of the RPM data, and calculate the time it takes for the engine RPM to increase by say, 2000rpm, from 5000rpm to 7000rpm, if the time is shorter after making a physical change to the intake, then the intake has a positive effect on performance.

From the collection of the 4 parameters, it's also possible to calculate the Volumetric Efficiency in Excel for every line of data collected which shows the effect of the air-intake and whether the ram-effect is at work or not.
 
Calculated flywheel figures on a dyno aren't a totally accurate measurement. That's not to say they aren't a good tool but it's important not to get too hung up on the numbers.

I think Stevens car is within the typical range of what's commonly seen from s54 outputs so I'd imagine fitting an airbox and alpha-n to his car would only build on that. whether he would make 350 or 360 could be down to the variation you get, day to day, car to car etc. that one m3 making the big figures is just a lucky engine. Perfectly assembled, perfect running in and Maintainance, perfect day for the run, who knows? But it's not worth using as a baseline Imo.

As for the intake and remap being close to csl power, well, it looks like that's the case and it is quite impressive on the face of it. But then that's comparing standard with modified. If you remap a csl I imagine the gap will be maintained, though perhaps there's less to be gained mapping the csl, I don't know. Whatever the case, manufacturers have a lot more things to consider than the peak power so it's not surprising that a good tuner can eek out the last bits from them.

Given that a lot of these engines make around 325/330 I think that I'd be more than happy if I could make a solid 350 with just an airbox and a remap. If others are seeing 360 then that's great, but I always tend to downplay any power claims and expectations as I know what a lottery dynos can be.
 
Beanie has summed it up well.

Dyno figures can vary between different dynos, different days, brand of tyres (we always see lower figures with supersports), etc.

We always say to people not to get too hung up on the figures - its the difference which is important and the shape of the graph.
 
Eventuri said:
Beanie has summed it up well.

Dyno figures can vary between different dynos, different days, brand of tyres (we always see lower figures with supersports), etc.

We always say to people not to get too hung up on the figures - its the difference which is important and the shape of the graph.
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But you are using (very impressive) BHP figures to push/sell your product?! :|

In any case, I am genuinely interested in the intake and remap making more than 25bhp+ over standard, and potentially more than a CSL with the right car. For an outsider, that seems like a pretty big claim. When BMW who designed the engine originally and have a development budget we could only dream of can only get an extra 17 bhp using a redesigned and fully carbon intake and plenum, Alpha-N tune (probably makes little difference admittedly), uprated cams (Shrick I believe?) and no doubt a more aggressive map to take advantage of these, I'm struggling to understand how your achieving more power? Do you have any power run graphs of a car with your intake and map next to a CSL?

Before anyone flames, I am genuinely interested as others would be if this package can honestly bring the gains it claims for the money, just seems a bit too good to be true.....anyone independently tested the intake/tune?
 
We are only concerned with the delta on the dyno. Not the end figures.

Evolve's S54 remaps have been extensively tested on dyno's that do not belong to them in the USA and other countries as they tune more of these cars remotely than we do at their HQ. Feel free to take a look on the US forums.

Here is just one example of a Z4M with the Evolve tune in the USA. The graph in in WHP.

7247738636_50847381f7_b.jpg

I am sure the intake will be tested shortly and will show exactly what we do.

As Exdos has pointed out that is the best way to see if the intake is working. You could do it with the Torque Andriod app and a £5 bluetooth dongle. We could put this data up but then you would say it is not independent. So if you are sceptical then wait until someone does test it.

In fact if Exdos wants to make a trip to Evolve (Imran said he would buy lunch ;-)) with a stock air box we will let him datalog it back to back with the Eventuri an release the data. We already know what it will show.
 
I'm interested in the Eventuri. I visited Saturday, but forgot my wallet to purchase!

Do you offer a Eventuri and map package?
 
Evolve do. It is around £999 inc VAT fitted, mapped and dyno'd.

Please contact them on sales at evolve automotive.com or 01582 584 000.
 
Didn't really answer my question, I was asking what makes your map/intake better than BMW's efforts....? I'm not doubting 'what you do', but if we just blindly believe what every manufacturer of anything told us we'd all end up with eBay electric fans in our intakes offering us +50bhp!
 
AndyBeech said:
Didn't really answer my question, I was asking what makes your map/intake better than BMW's efforts....? I'm not doubting 'what you do', but if we just blindly believe what every manufacturer of anything told us we'd all end up with eBay electric fans in our intakes offering us +50bhp!
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Not asking you to blindly follow. You wanted independent testing I provided this for the remap. Just wait for the intake to be tested in the same way to satisfy your question.
 
AndyBeech said:
Didn't really answer my question, I was asking what makes your map/intake better than BMW's efforts....? I'm not doubting 'what you do', but if we just blindly believe what every manufacturer of anything told us we'd all end up with eBay electric fans in our intakes offering us +50bhp!
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I would guess that BMW have a number of parameters to meet other than purely maximising engine performance?

For example, the Z4Ms suspension set-up is widely accepted to be heavily flawed, with a £2k after market coilover set offering a significant and very noticeable imporvement....why weren't BMW able to match this originally......I'd imagine they were, but had other variables / parameters / considerations and goals to meet.
 
StevenH72 said:
AndyBeech said:
Didn't really answer my question, I was asking what makes your map/intake better than BMW's efforts....? I'm not doubting 'what you do', but if we just blindly believe what every manufacturer of anything told us we'd all end up with eBay electric fans in our intakes offering us +50bhp!
Click to expand...

I would guess that BMW have a number of parameters to meet other than purely maximising engine performance?

For example, the Z4Ms suspension set-up is widely accepted to be heavily flawed, with a £2k after market coilover set offering a significant and very noticeable imporvement....why weren't BMW able to match this originally......I'd imagine they were, but had other variables / parameters / considerations and goals to meet.
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Yep - for the intake system - noise levels are one of the regulations they have to abide by. Then they use a rectangular filter in a rectangular box which has obvious implications on airflow like deadspots and turbulence. This is one of the reasons why many manufacturers have to use a mesh screen before the MAF sensor - to smooth the airflow out otherwise the MAF sensor throws a fault or doesn't read properly.

At the end of the day - I could go on about how much more efficient the Eventuri system is and what makes it so different from the standard airbox as well as other aftermarket intakes like the Gruppe M - but perhaps the best way is to speak to people who already have it in their cars and maybe even experience it for yourself.

Ninarvana who currently has an intake will be doing a write up and I will give her some technical information on the Eventuri and its unique design. Should be a good insight.

Bilal
 
Looking at some mods for over the summer and sent the guys from Evolve a couple of messages through Facebook today.

I can see one of these (probably including the map) on my M in the summer I think, watch this space.
 
Ok this is only the briefest of brief reviews so far, but I've just driven my car back from having the Eventuri intake fitted. I drove the long way home :D but it was still only just long enough to have the car fully warmed up.

Initial impressions - throttle response seems to be a lot smoother and easier to modulate and the noise is really good!! It's the same as stock below about 3k and then builds and changes as you explore the rev range. By the upper reaches it really is making a lovely racket. I can't wait to hear what it sounds like from the outside!

When I get a chance I'll do some in-car GoPro videos and an external drive-by.

So far very pleased :thumbsup:
 
original guvnor said:
Ok this is only the briefest of brief reviews so far, but I've just driven my car back from having the Eventuri intake fitted. I drove the long way home :D but it was still only just long enough to have the car fully warmed up.

Initial impressions - throttle response seems to be a lot smoother and easier to modulate and the noise is really good!! It's the same as stock below about 3k and then builds and changes as you explore the rev range. By the upper reaches it really is making a lovely racket. I can't wait to hear what it sounds like from the outside!

When I get a chance I'll do some in-car GoPro videos and an external drive-by.

So far very pleased :thumbsup:
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Same experience as me, I love how you almost hear the growl building from 3k up.....like you woken the lion :thumbsup:
 
exdos said:
To test whether any air-intake has any effect (positive or negative) on performance of a car in "real world" driving conditions is now dead easy. Get yourself a bluetooth OBD II adapter for around a fiver off ebay and use it in conjunction with an OBD app for an android device ( Torque app - free) and then simultaneously record 1. Airflow through MAF, 2. engine RPM, 3. Vehicle speed and 4. Intake Air Temperature. If you record these 4 parameters for "before and after" runs in 3rd gear accelerations from a rolling start from 2000rpm to the redline and save the files in .csv format, you can then compare the results in an Excel spreadsheet. If you see a significant increase in the airflow through the MAF at a given RPM, then this wil translate into an increased power output by the engine. Alternatively, if you look at the timestamp of the RPM data, and calculate the time it takes for the engine RPM to increase by say, 2000rpm, from 5000rpm to 7000rpm, if the time is shorter after making a physical change to the intake, then the intake has a positive effect on performance.

From the collection of the 4 parameters, it's also possible to calculate the Volumetric Efficiency in Excel for every line of data collected which shows the effect of the air-intake and whether the ram-effect is at work or not.
Click to expand...

I will try and do this before and after fitting my GruppeM. Might be able to draw some comparisons then if some body can do the same for the Evolve.
 
This is something I have been following, and am seriously thinking about/ without having to read back, can this be done as a supply-only, and be fitted outside of evolve(at my bmw specialist), and does it work as well without having a remap done at the same time?, Bilal,

Also,is it possible to have the scoop in another colour, i.e black(more low-key, and not clashing with car/body colour/other items)

Cheers
 
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