pbear1973
Well-Known Member
Just got my Gruppe M fitted at Boss today.. as always awesome service from Nic and gang. 
Pictures:
My baby, exterior view is perfectly stock.
Front view, again perfectly stock:
Engine bay with Gruppe M and BMS tuned 4-potter.
Close-up of Gruppe M airscoop. Silly me wanted to fit another one.. hahahaha..
One last pic, this time of my Eisenmann Sports peeking shyly from under my rear bumper. The E92 LCI has a slightly longer bumper. Not ideal, but sound-wise still nice.
Ok pictures out of the way, now my "review" based on my limited experience driving from Sin Ming to Pasir Panjang. Route taken was Sin Ming->Marymount Road->Adam Road->Queensway->AYE->Prince George's Park Road->Pasir Panjang Road.
Low-end torque loss: There is a small amount of low-end loss below maybe 2500 rpm.. but it's not significant and not really noticeable unless you're looking for it. In any case it's much, much less than I initially feared. Even one of the Boss techs told me last time that he expects the low-end loss to be quite jialat. Happy to report that this is not the case.
Induction sound: It starts with a low growl at 2,000 rpm above, getting louder and louder with the RPMs and really roars at 4,000 rpm and above, with a hissing sound at very high RPMs. The sound is really orgasmic.. If you ask me, the sound itself is worth the money.
Engine revving: the engine seems more willing to rev now.. easier to hit high RPMs than before. I base this on my experience of about 2,000 km of driving between my BMS tuning and fitting the Gruppe M's today.
High end gain: Yes acceleration is definitely better at high RPM (due to the less restrictive airbox?) and overtaking at medium to high speed is much better due to the ram-air.
Between the induction roar,my eisenmann exhausts and typical bimmer solid construction.. I hit 140 on Marymount Road without realizing it..
Meeting Rod tonight to do ignition upgrade. :woottt:
Pictures:
My baby, exterior view is perfectly stock.
Front view, again perfectly stock:
Engine bay with Gruppe M and BMS tuned 4-potter.
Close-up of Gruppe M airscoop. Silly me wanted to fit another one.. hahahaha..
One last pic, this time of my Eisenmann Sports peeking shyly from under my rear bumper. The E92 LCI has a slightly longer bumper. Not ideal, but sound-wise still nice.
Ok pictures out of the way, now my "review" based on my limited experience driving from Sin Ming to Pasir Panjang. Route taken was Sin Ming->Marymount Road->Adam Road->Queensway->AYE->Prince George's Park Road->Pasir Panjang Road.
Low-end torque loss: There is a small amount of low-end loss below maybe 2500 rpm.. but it's not significant and not really noticeable unless you're looking for it. In any case it's much, much less than I initially feared. Even one of the Boss techs told me last time that he expects the low-end loss to be quite jialat. Happy to report that this is not the case.
Induction sound: It starts with a low growl at 2,000 rpm above, getting louder and louder with the RPMs and really roars at 4,000 rpm and above, with a hissing sound at very high RPMs. The sound is really orgasmic..
If you ask me, the sound itself is worth the money.Engine revving: the engine seems more willing to rev now.. easier to hit high RPMs than before. I base this on my experience of about 2,000 km of driving between my BMS tuning and fitting the Gruppe M's today.
High end gain: Yes acceleration is definitely better at high RPM (due to the less restrictive airbox?) and overtaking at medium to high speed is much better due to the ram-air.
Between the induction roar,my eisenmann exhausts and typical bimmer solid construction.. I hit 140 on Marymount Road without realizing it..
Meeting Rod tonight to do ignition upgrade. :woottt:
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