Engine Coolant: How Hot Is Too Hot? | Lexus V8 Swapped GT86 Upgrade [TECH TALK]

The V8 swapped, 6 speed sequential fitted GT86 hits the track (in-car footage and all!).

When taking a 450HP V8 swapped car from the street to the track for sustained racing, cooling is going to become an issue. In this [TECH TALK] we're going to discuss where we started when it came to keeping the Toyota GT86 with a 450HP naturally aspirated 1UZ-FE VVTi engine within an acceptable operating temperature for more than a sprint race.

A few things on the car had already been upgraded with MCA Suspension Coilovers, Endless brake package and TTi GTO 6 speed sequential box being fitted by us to help improve on what the previous owner had already done which included an uprated radiator, oil cooler and dry-sump system. Since shooting the car has undergone more modification.

Even though on paper the specs of the system were more than enough for the output and size fluid capacity of the engine and cooling systems, in practice after more than 6 laps temperatures would spike once hitting 116 degrees Celsius when behind safety car traffic with no clean cool air to feed it.

Andre runs through what the issues were, the plans to fix them with help from PWR Performance Products expertise and the first stage of implementing them. This included addressing diff and gearbox temperatures along with what to look for in your data to ensure cooling problems are solved rather than just reduced.

00:00 Intro
01:16 The Problems
03:09 The Original Setup
04:08 The Plan
05:25 Potential issue
05:52 Track Testing
08:00 The Results

Want to learn how to tune EFI? Start here instantly, and for free.