Alpha Miata LS1 Update

It has been a few months since our last update on the 1999 Mazda Miata V8 swap project, which we call the Alpha LS1 Miata. The latest update (here) covers what we’ve been up to on this prototype build for the past few months.

As you can see when you read the latest build thread update, an all-new tubular rear subframe was designed and built. This new bolt-in subframe houses a Ford 8.8″ aluminum differential housing, which is more than capable to withstand the 450 ft-lbs of torque the motor will put through it.

The rear subframe also has all new rear control arms that we have designed and built, which attach to heavier duty uprights and rear wheel hubs. These were chosen for the input splines’ higher torque capacity, for all new halfshafts that will be added. The aluminum uprights also mount a variety of larger disc brake set-ups.

Check back soon for more updates on the custom tubular front subframe assembly, which is made to house Mazda RX8 aluminum control arms, uprights, hubs and larger brakes. The tubular subframe was chosen to allow for more room for the LS1 V8 as well as proper full length headers. Adding the stronger RX8 hubs and brakes was also a key design goal. Check back here at the Vorshlag blog for future updates!

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