Induction or not Induction...

"M" Specific discussion
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MichaelPorter80
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Induction or not Induction...

Post by MichaelPorter80 » Mon Sep 09, 2019 9:05 pm

Hello all,

I have pulled the trigger on an eisenmann race exhaust, it’s will arrive in 2-3 weeks and I’m very excited! The look of the pipes and the noise are the attraction for me. I’m keeping the stock boxes just in case I ever decide to sell and want to put back to stock, (unlikely!)

I am also considering an induction kit, based on hearing a couple at ZedFest either Gruppe M or Eventuri, does anyone have an opinion on this, good or bad they’d like to share?

I realise performance impact is minimal, but the look under the bonnet and the sound are quite attractive...

Let the discussion commence!

M
1st Z4 bought in 2009 - Sapphire Black, 2.0l Sport SOLD
2nd Z4 bought in 2013 - Midnight Blue, 2.0l Sport SOLD
3rd Z4 bought in 2019 - Sapphire Black Z4MR Imola Red Leather

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mr wilks
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Induction or not Induction...

Post by mr wilks » Mon Sep 09, 2019 9:13 pm

You should have gone for the induction first , 2 very different aural experience between exhaust to induction & for me looking back over my 3 x ZMs whilst i modded all 3 backboxes i much preferred the noise with just Gruppe M fitted .
The last car i changed backboxes more from a visual preference as i was keen not to spoil the noise from up front .
Previous Zs :roll:
E86
E85
///MR
Si E85
E89 23i
Si E85
E86
3.0Si E85
///MR
35i Msport 6spd
E86
///MR
E86
35is

911 997 Carrera4


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https://www.instagram.com/andy911wheels/

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srhutch
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Induction or not Induction...

Post by srhutch » Mon Sep 09, 2019 9:18 pm

I’m with mr Wilks. I’ve gone back to std boxes with my GruppeM, just fitted bigger tips.
93076965-FEB7-46DD-B165-641791D29F01.jpeg
93076965-FEB7-46DD-B165-641791D29F01.jpeg (355.45 KiB) Viewed 358 times
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RedUn
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Induction or not Induction...

Post by RedUn » Mon Sep 09, 2019 9:56 pm

MichaelPorter80 wrote:
Mon Sep 09, 2019 9:05 pm
Hello all,

I have pulled the trigger on an eisenmann race exhaust, it’s will arrive in 2-3 weeks and I’m very excited! The look of the pipes and the noise are the attraction for me. I’m keeping the stock boxes just in case I ever decide to sell and want to put back to stock, (unlikely!)

I am also considering an induction kit, based on hearing a couple at ZedFest either Gruppe M or Eventuri, does anyone have an opinion on this, good or bad they’d like to share?

I realise performance impact is minimal, but the look under the bonnet and the sound are quite attractive...

Let the discussion commence!

M
I ran the same back boxes with the eventuri, it's a great combo and genuinely not that OTT at all, in the end I slapped in some supersprint decats and now it sounds :evil:
IMOLA Z4///MR

MichaelPorter80
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Induction or not Induction...

Post by MichaelPorter80 » Mon Sep 09, 2019 10:06 pm

I’m pretty new to all this, what would you describe as the difference in the noise front vs back? I was driving behind an M with Eisenmann exhaust and Eventuri and got this lovely high pitched racing noise under relatively high revs... not like a boy racer “big bore” exhaust but how a real performance car sounds. Was that the induction or the exhaust? I can’t get the sense of it from YouTube...!
1st Z4 bought in 2009 - Sapphire Black, 2.0l Sport SOLD
2nd Z4 bought in 2013 - Midnight Blue, 2.0l Sport SOLD
3rd Z4 bought in 2019 - Sapphire Black Z4MR Imola Red Leather

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mr wilks
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Induction or not Induction...

Post by mr wilks » Mon Sep 09, 2019 10:13 pm

MichaelPorter80 wrote:
Mon Sep 09, 2019 10:06 pm
I’m pretty new to all this, what would you describe as the difference in the noise front vs back? I was driving behind an M with Eisenmann exhaust and Eventuri and got this lovely high pitched racing noise under relatively high revs... not like a boy racer “big bore” exhaust but how a real performance car sounds. Was that the induction or the exhaust? I can’t get the sense of it from YouTube...!
It doesn't take much of a exhaust change to drown out any induction noise , of the two all i can say is i preferred the latter .
WIth a S54 the mechanical roar from the front when under load is part of the ownership pleasure , add the GruppeM then its heightened measurably but in a tasteful way , at no time intrusive as with virtually all aftermarket boxes
Previous Zs :roll:
E86
E85
///MR
Si E85
E89 23i
Si E85
E86
3.0Si E85
///MR
35i Msport 6spd
E86
///MR
E86
35is

911 997 Carrera4


Image

https://www.instagram.com/andy911wheels/

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MrPT
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Induction or not Induction...

Post by MrPT » Mon Sep 09, 2019 10:15 pm

This vid captures the basic difference in tone, albeit with a fairly extreme flavour of each - CSL airbox (with bonnet vents!) plus RPI backboxes.



It’s quite similar to human biology - chatty up front and farty out the back.
2008 Z4MC: SG/Imola|+OEM CSLs|+KWv3|+TMS RTABLs|+VT mounts|+Eventuri|+OEM strut brace|+DB9 front BBK|+cruise
2006 Z4 2.5si: gone

MichaelPorter80
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Induction or not Induction...

Post by MichaelPorter80 » Mon Sep 09, 2019 10:21 pm

A great description :rofl:

And Great video! Thanks this helps a lot. I’ll get the exhaust on as it’s paid for and see how I go
1st Z4 bought in 2009 - Sapphire Black, 2.0l Sport SOLD
2nd Z4 bought in 2013 - Midnight Blue, 2.0l Sport SOLD
3rd Z4 bought in 2019 - Sapphire Black Z4MR Imola Red Leather

Muckinonthesofa
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Induction or not Induction...

Post by Muckinonthesofa » Tue Sep 10, 2019 6:32 pm

Here's a link to a post a put up a while back, there's a link in it to a video of a drive by of my Gruppe M;

viewtopic.php?f=9&t=116007&p=1667505#p1667505

:thumbsup:
Z4MC, Silver/Grey, Imola Red Leather, Sat Nav, Heated Seats, DSP, Intravee, Stubby, ZHP, Gruppe M, CDV, Bilstein B12's, Vibra-Technics engine mounts.

Matt.13
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Induction or not Induction...

Post by Matt.13 » Tue Sep 10, 2019 8:12 pm

I would like to hear your new exhaust, I’m torn between the sport and race
2nd gear sideways

MichaelPorter80
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Induction or not Induction...

Post by MichaelPorter80 » Tue Sep 10, 2019 8:14 pm

I’ll upload when it arrives and is fitted. I’ve heard one “in the metal” and it’s not as loud as you’d think.
1st Z4 bought in 2009 - Sapphire Black, 2.0l Sport SOLD
2nd Z4 bought in 2013 - Midnight Blue, 2.0l Sport SOLD
3rd Z4 bought in 2019 - Sapphire Black Z4MR Imola Red Leather

Rally
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Induction or not Induction...

Post by Rally » Wed Sep 11, 2019 11:40 am

induction absolutely with these engines :thumbsup:
I have a gruppem and bcs exhaust if I had to choose one it would be induction but I don't so I have both :D
we could catch up over the weekend and you can have a go in mine?
Imola z4mr, carbon graphite ispiri FFR-6, mpss, gruppem, kw v3, oe strutbrace, aero skirts, schmiedmann carbon splitter, bcs exhaust, dice media, gaptech, F10 zhp & smiles every journey.

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