Driven: Mazda MX-5 BBR Cosworth


During our recent visit to drive BBR's Mk1 MX-5 turbo we managed to grab a short drive in the firm's Mk3 MX-5 fitted with a supercharger conversion developed with Cosworth.

It's an Eaton 4th generation MP62 blower, with Cosworth's own inlet manifold housing and an air-water intercooler, higher flow fuel injectors and new air box/filter, plus BBR's Interceptor 2010 ECU.

The kit provides a healthy gain on the Mazda's original figures: power rises to 235bhp at 7,130rpm while torque now stands at 190lb ft at 5,260rpm. As of now, BBR's demonstrator is otherwise exactly as Mazda intended.


BBR claims the conversion has a 'manufacturer' type feel to it, and by that they mean it feels as smoothly integrated into the car as if it was just another model in Mazda's range. I'd agree: with a standard exhaust back box, there's very little to signify the additional plumbing under the bonnet save a mildly more aggressive take on the mk3s slightly 'thin' induction note and a faint whine when you're accelerating. If you're looking for something that feels O.E. then this is just such a conversion.

But the car's newfound performance is obvious. Even from just above tick-over the car just pulls and pulls, regardless of gear. It's an a new experience in a Mk3 - you can be on the motorway in sixth, leave the gearlever alone, and still pile on speed in 10 or 20mph increments without effort. But rev it out hard and it's properly rapid, with a real sting towards the red line. Power oversteer is now an everyday reality with the traction control off, especially in slippery conditions; roundabouts are great fun, aided, in particular, by the immediacy of the supercharged torque delivery.

BBR wants £4,995 (fitted) for this transformation (although you can fit it yourself), but it provides a whole new dimension to the car, and an awful lot more speed.



 

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Comments (76) Join the discussion on the forum

  • hornetrider 14 Jun 2011

    CocoPops said:
    So, 6 months on....

    How many conversions have been done?
    There's a few on mx5.com/forum in the Mk3 section

  • CocoPops 14 Jun 2011

    So, 6 months on....

    How many conversions have been done?

  • CocoPops 16 Jan 2011

    So has a "paying punter" had this conversion done yet?

  • VladD 05 Jan 2011

    hornetrider said:
    So I emailed BBR with some questions regarding the conversion. Whilst I haven't heard back from them yet on those issues (it is only the 2nd day back after New Year) I have had a circular email from them as I'm now on a mailing list.

    BBR said:
    Dear Sir, thank you for your recent BBR Cosworth supercharger enquiry, please find below offer you will find difficult to refuse!

    BBR Cosworth Supercharger - Buy back offer

    We realise at BBR that many of our potential clients with the new MX5 NC model will possibly not keep their car for longer than three years, so if you are keen to have a BBR Cosworth supercharger fitted to your MX5 here is an offer you will find difficult to refuse:

    Any BBR Cosworth S/C conversion ordered before March 2011 and installed by BBR qualifies for this unique offer.

    When you have finished with your BBR Cosworth S/C MX5, fancy a new car or just a change, BBR will buy back your used S/C conversion from you. We will return your vehicle back to standard (using the parts returned to you at installation) for no charge and give you £1250 cash in your hand, yes, we mean it, returned to STD FOC and you will receive £1250 cash!

    Offer is valid for 3 years from time of installation and up to a maximum of 40 000 conversion installed miles.
    Considering they are doing the work FOC I think that's a great offer!!
    That does sound very good.

  • hornetrider 05 Jan 2011

    So I emailed BBR with some questions regarding the conversion. Whilst I haven't heard back from them yet on those issues (it is only the 2nd day back after New Year) I have had a circular email from them as I'm now on a mailing list.

    BBR said:
    Dear Sir, thank you for your recent BBR Cosworth supercharger enquiry, please find below offer you will find difficult to refuse!

    BBR Cosworth Supercharger - Buy back offer

    We realise at BBR that many of our potential clients with the new MX5 NC model will possibly not keep their car for longer than three years, so if you are keen to have a BBR Cosworth supercharger fitted to your MX5 here is an offer you will find difficult to refuse:

    Any BBR Cosworth S/C conversion ordered before March 2011 and installed by BBR qualifies for this unique offer.

    When you have finished with your BBR Cosworth S/C MX5, fancy a new car or just a change, BBR will buy back your used S/C conversion from you. We will return your vehicle back to standard (using the parts returned to you at installation) for no charge and give you £1250 cash in your hand, yes, we mean it, returned to STD FOC and you will receive £1250 cash!

    Offer is valid for 3 years from time of installation and up to a maximum of 40 000 conversion installed miles.
    Considering they are doing the work FOC I think that's a great offer!!

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