Z4-forum.com

So, as some may know, I was part of the group buy for the Infinitas/GPower supercharger a few months ago. It’s been a bit of a journey, but today, we finally have an MOT!

Here is a brief history of my life for the past few months

Supercharger arrives - super excited
Off to Ross at RBM to have it installed
Install all good (Ross and his team are awesome)
After a little bit of driving, gets a misfire
Back to RBM to check coils, plugs etc - all good, but new plugs installed
Still misfiring
Change MAF
Still misfiring
MOT due, so off for its inspection (in hope). Fails badly on emissions
Decide it must be a map issue - Inifintas swear it isn’t, but aren’t much help TBH
Contact Josh at Severn Tuning. Long chat, decide to upgrade injectors ahead of custom map
Injectors arrive - some install challenges but go in ok
New map from Severn Tuning - still running rich and very smoky
Replaced pre cat o2 sensors, start thinking about new cat…
Lots of diagnostics runs/tests and some head scratching with Josh
Josh works his magic, 2nd new map installed
Seems to be running ok so…
… off for MOT - gets a perfect emissions test score!
We’re back and legal again!

Now just need to start driving it - have run it around a bit during the process and it feels like it just has so much power on tap and urgency right through the rev range, so looking forward to giving it a proper test.

The injectors were 365cc (stock is around 240) so we should be getting somewhere around 340/350bhp, and at some point I’ll dyno it to find out.

Suffice to say, after a long 3 months working through the issues and spending way more money than originally planned, I’m a happy man. Huge thanks to Josh at Severn Tuning and Ross at RBM, recommend both highly.

Off to the Alps in July for a 6 day road trip including Furka, Stelvio and Grossglocker to play with all that power, and my new LSD.

Cool

Worcester_spoon wrote: ↑Sat Apr 09, 2022 9:28 am Off to the Alps in July for a 6 day road trip including Furka, Stelvio and Grossglocker

Great news that you have hopefully got it all sorted . That drive through the Alps will definitely give it a good test . Don`t forget to take some photos .

Good to know you finally got there.

340 bhp and an LSD work pretty well in a Z4!

Awesome write-up, thanks for sharing. Keep those experiences coming, they’re extremely valuable to dreamers such as myself

Awesome mod and well done for persevering

Sure it will be worth all the effort. Enjoy.

Good result,and glad it got sorted.
Good work by Rbm and Severn tuning by the sounds of it.
Enjoy

I just wish someone with an M would post from the group buy,on their installs.

I bet that’s going to be fun to drive, time to enjoy

Nice job what was the final bill
Did you do any brake or suspension upgrades to cope with the extra horses

I was lucky enough to see this car in the metal today. What a beast! The supercharger kit seems like a quality piece of engineering and works very effectively
Always good to see another forum enthusiast too.

What boost does that kit make ?

What boost does that kit make ?

G-power state 310bhp for your kit

mac27040 wrote: ↑Sat Apr 30, 2022 10:20 pm G-power state 310bhp for your kit

But G Power don’t take into consideration the upgraded injectors and custom map… Trust me, it’s way more the 310.