The RB25det that is being used for Project Leopard is the original engine from Project Car Magazine. The engine was blown (#6 piston ringland failure) when it was received.
Initially when the engine was installed, there were very few upgrades (Greddy intake manifold), but the internals were left stock.
Over the course of various ownerships, internals were never upgraded, but turbochargers got larger and with drifting, the engine was pushed until failure.
My overall approach to older cars is to rebuild. Since I have never dealt with an RB engine on a personal level, I didn’t know if I wanted to commit to a rebuild. Once I saw the price for an RB25det on a crate (None are new engines), I decided to commit to a rebuild.
This being an RB25det, I had to commit to building it from the ground up, address any of the common issues such as oil problems and update/upgrade to good parts and most importantly, use good parts.
When Marco (original builder) and I were planning the RB25det rebuild, he said one stipulation, “No cheap parts, No ebay/cheap junk, quality parts only”. I agreed.
This is when I decided I wanted to build something interesting and amazing. A bit of old school, but also newer technology to make the engine great. While on this process, I needed to learn all the issues and address/solve them as much as I could.
I also had to be good with my goals. This is going to be a street car rather than a drift or high horsepower car (even though tempting).