Before you can start modifying the engine block you need to know what you have. During the disassembly process measure the engine parts and compare them to the Nissan specifications.
Intakes are typically cast and consequently can end up with casting flash and misshapen ports due to mold shifts. If you are porting your cylinder head you already have all the supplies you need to also port your intake.
One big area for improvement on the L-series heads is modifying the intake and exhausts ports. Here is a step-by-step guide for porting and polishing the ports.
There are many great books written on motorsports. Each book offers an individual perspective on motorsports and the art of driving a car at the limit in competition.
In Endurance racing it is important to have radio contact with the driver. Installing a radio into a helmet takes a little care but can be done with a few simple tools.
The first weekend in December, NASA hold a grueling endurance challenge the 25 Hours of Thunderhill. We competed as part of team CSR Performance in a modified Spec Racer Ford Gen3.
Key to increasing the performance of an L-Series motor are modifications to the cylinder chambers. This article covers CC'ing, unshrouding the valves, valve set transitions and chamber polishing.
Changing the air filter is very simple requiring no tools, just a simple rag and possibly some degreaser. Most people change it just before qualifying or if it is soaked in oil due to engine blow by