QUICK TECH TIP: CLOSED LOOP BOOST I’ll make this into a proper blog post later down the line, but as we prepare for tomorrows dyno session I thought it’d be nice to share some useful data analysis examples. The attached images are using megalogviewer with a log generated from your ECU. With closed loop boost […]
Here at BOFI Racing our choice for rollbars are those manufactured by GC Fabrications here in the UK, we run them on all our cars from the usual ‘GC’ style bars to the ‘GCR’ rollbars for our more track-oriented cars. The GCR bars follow the roof line more or less as closely as possible, giving […]
We were massively surprised by the outcome of the dyno testing of our SR1 Supercharger kit. Granted, this engine has a 4-1 (used, old-school) exhaust manifold and a 17% reduction pulley but still… We turned up and the first pull netted us 160WHP, which isn’t far off what we expected to leave with – as […]
Here’s the dyno chart from this Saturday 08/06/2019 for Winston – Our 1.8VVT Rod Block. It’s been fully blueprinted and has had about 15k miles put on it since being built – daily driven, tracked etc. It was completely torn down, cleaned, honed and balanced. Using stock pistons with new rings, balanced with a Dremel. […]
The Mazda MX5’s engine started out life in a 323 GTX which was not only turbocharged from the factory, it was using a homologation car for the efforts in rally competitions all over the world. Suffice to say, the core engine design is well suited to having a reasonable amount of boost thrown at it, […]
BOFI Racing T2 Low Mount Turbo Manifold What does it mean to ‘turbo your mx5’ or any car for that matter? Does it mean bolting a cheap unresponsive turbo to a cheaply manufactured manifold and chasing cracking and faults? Does it mean making compromises to the build of the car, like notching the frame rails, […]
One of the biggest contributing factors to a poor running boosted car is the intake air temperature sensor. This is used to calculate the mass of air going into the cylinder, hotter air is less dense and requires less fuel than colder air. If we assume that the VE of the engine has been calculated […]
Winston has undergone many changes in the last 18 months – pretty much everything except the shell has been touched or replaced. This includes a complete suspension overhaul including NB subframes and polybushes, a full SVT brake upgrade (the brake bias still needs tweaking) and a complete drivetrain swap consisting of a ‘rodblock’ VVT and […]
Let’s just keep in mind here that the cars themselves are now over 30 years old, for the very oldest examples. Regardless of their use case, the engine mounts are going to be in need of attention if they’ve not been done before. But what is the purpose of engine mounts, what’s all the fuss […]
The gearboxes for the NA and NB MX5s – both the 5 speed and the 6 speed all require a quality GL-4 75W-90 gear oil. Sometimes, the product with the higher version number isn’t best to use, in this case, GL-5 being the prime example. Anecdotally, a Gl-5 based oil of the same quality/manufacturer gives […]
