31/03/2026
This k20/24 built turbo Time Attack racecar was in for an exhaust leak repair . As racing was approaching the next coming month I didn't have much of a window.
The low mount setup was creating all sorts heating issues for drivers and engine, also wearing out various components.
We had turbotech supply and service the turbo with a new rear housing and all the fabrication components to suit.
With only 150mm of room to work with, and a list changes for everything else that was required to all work.
I decided to fab a smaller bore style compact manifold, that was more sized to the port diameter.
I highly mounted the turbo for full airflow. The exhaust was made as straight a possible and was all purge welded for reliability. Heat management was also applied everywhere on the system.and components, which worked well and fixed all the heat soak issues.
As the result of the reconfigured hotside made more power with 2psi less boost, wheeling off 500hp on 18psi @ 8000rpm. Also making it fatter throughout the rev range, which inturn quicker through the corners
But the real world results came when both drivers managed to improve their PB,s by several seconds on from roughly 1:26 to 1:18 on the Morgan Park K track.
Good back to back comparison from different styles of engineering.
