G-Power tunes new BMW Z4 to 500hp


If there's one tangible positive to the proliferation of turbocharged cars now offered to customers, it's their relatively simple tunability. Huge gains never possible with natural aspiration can be had with induction, exhaust and ECU tweaks, which is almost exactly what's happened with this G-Power BMW Z4.

With the addition of a Performance Software V2 map, new downpipes, sports cats, a bigger intercooler and a modified turbo, the Z4 M40i makes 500hp and 516lb ft. Noticeable tweaks, sure, but not a huge amount to yield another 160hp and 147lb ft over standard. As G-Power itself notes, "even the BMW Z4 M will not produce that many horses. If it'll be realised at all..."


Unsurprisingly, G-Power also recommends a top speed de-limit to fully exploit the Z4's potential; it's said to be capable of 186mph "and beyond" once unshackled from the software. There seems to be little beyond a set of forged wheels to improve the Z4 chassis wise, though G-Power does maintain that the aircraft-grade aluminium rims "lower the unsprung weight for improved acceleration, handling and braking." Capable though the Z4 has proven itself already, this sort of improved performance should probably be supported by some additional braking power at least. And maybe some suspension changes. And tyres...

Then we're into tuning, which inevitably means talking about the Supra this Z4 shares so much with. Presumably G-Power could do just the same with the Toyota as with the BMW, the resulting Supra arguably more interesting to enthusiasts than the equivalent Z4. Still, 500hp is 500hp, whichever form it comes in - G-Power's Z4 upgrades are available to order now.





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Comments (34) Join the discussion on the forum

  • sidesauce 08 Jul 2019

    And so it begins...evil

    Not the best aftermarket wheels I've ever seen but, to be fair, not the worst either!

  • dibblecorse 08 Jul 2019

    It's hard to imagine many BMW buyers needing it; Supra drivers, however...

    Why ??????

  • 5harp3y 08 Jul 2019

    Because of the deluded journalistic view that all supra owners modified their cars. Which obviously didn't happen when they were new

    Bet their are more bmw owners right now modifying* their cars than Toyota owners.

    • Modifying in 2019 is a remap and maybe induction kit along with bmw performance bolt on tinsel

  • J4CKO 08 Jul 2019

    dibblecorse said:
    It's hard to imagine many BMW buyers needing it; Supra drivers, however...

    Why ??????
    What about all those tuned M140i's ?

    This isnt new, the B58 has been around since 2016 and has had various tuning options emerge.

    With a tuning box people are seeing between 415 and 440 bhp, so can see how with supporting mods it will do 500.

    They arent that far off the M4 engine design wise, same capacity, closed deck block, forged crank etc. The B58 just has a single turbo and can struggle with track work as it doesnt have the S55 engines baffled sump for high G loads so the engines get starved of oil on track and can expire.

    But, apparently its not as good as a 2JZ, but nobody has actually give any technical details as to why ? Am really interested to know, it may be the case. Be interesting to see where they take it, and whether it can make over 1000 bhp ? might be being an alloy block it wont put up with as much ?


  • dibblecorse 08 Jul 2019

    J4CKO said:
    dibblecorse said:
    It's hard to imagine many BMW buyers needing it; Supra drivers, however...

    Why ??????
    What about all those tuned M140i's ?

    This isnt new, the B58 has been around since 2016 and has had various tuning options emerge.

    With a tuning box people are seeing between 415 and 440 bhp, so can see how with supporting mods it will do 500.

    They arent that far off the M4 engine design wise, same capacity, closed deck block, forged crank etc. The B58 just has a single turbo and can struggle with track work as it doesnt have the S55 engines baffled sump for high G loads so the engines get starved of oil on track and can expire.

    But, apparently its not as good as a 2JZ, but nobody has actually give any technical details as to why ? Am really interested to know, it may be the case. Be interesting to see where they take it, and whether it can make over 1000 bhp ? might be being an alloy block it wont put up with as much ?
    Agreed, thats why I was surprised by the headline that alludes to only Supra owners being interested in the tunability ....

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