Tag Archive: LSX

Project LSX-7 Update 16 – Cooling System & First Spin of the Drivetrain

LS Swap FC RX-7 Cooling System It’s no secret that LS engines have been swapped into RX-7’s for years. The benefit of being a fairly common swap is that there is quite a bit of information about how to construct an adequate cooling system. After doing some research, I discovered a company named Jags That…

Project LSX-7 Update 14 – T56 Transmission and C4 Driveshaft Install

The most difficult part to source for the swap up until this point has been the T56 transmission. T56 transmissions are typically found in LS1-powered Camaros and Firebirds (along with many other sports cars). They are a 6-speed manual transmission capable of handling over 450 lb-ft of torque in stock trim. Since so many cars…

Project LSX-7 Update 13 – First Start

In my last update, I showed the fuel system on the RX-7. In this post I'm going to go over nearly everything I have done to get to the point of starting the engine. It's going to be a big update and I guarantee it's been worth the wait! With the engine sitting in the…

Project LSX-7 Update 12 – Stage 1 Fuel System

Another area of an RX-7 that needs to be upgraded for an LSX engine is the fuel system. Even though the stock fuel pump is capable of flowing well enough for a stock engine, the pressure of the fuel needs to be regulated before it enters the fuel rails. I found a helpful post on…

Project LSX-7 Update 11 – Rear Subframe Modification and Bushing Install

As I mentioned in Update 10, the Turbo II rear end was one of the most valuable pieces of the entire parts car. Instead of pulling the differential, axles, brakes and hubs and swapping them over to Project LSX-7, I decided to just use the entire Turbo II subframe. This made installation easier and since…

Project LSX-7 Update 10 – S4 Turbo II Parts Car

When swapping an LSX engine into an RX-7, the weakest link in the car is the stock differential. As with most manufacturers, Mazda didn't design their base model components to handle more torque than they would ever be exposed to. However, they did design the differentials in S4 Turbo II models to handle more torque…

Project LSX-7 Update 9 – L33 Modifications and Preliminary Install

While it may appear that Project LSX-7 hasn't been touched in weeks, this couldn't be further from the truth. Before diving into the latest update, the first thing I would like to do is introduce Secondbolt Racing as the latest sponsor for the project. Secondbolt Racing was officially created 5 months ago by an Import…

Project LSX-7 Update 8 – Ronin Speedworks LSX Mount Kit

When I was deciding on an engine swap, two of my deciding factors were ease of installation and cost. Right around the time I started to research potential swap options, a company named Ronin Speedworks released prototype photos of their FC RX-7 LSX mount kit. These photos helped make my decision a little easier. Typically,…