New 2.8 Liter Six for the Racecar, I'll be asking a bunch of Conversion Questions Options

[motorvated]

The first question I have is related to modifications to the engine shelf pieces required for the 6-cylinder conversion. I noticed the Patrick Motorsports sells an expensive engine shelf kit for the 6-cylinder conversion. But, since the 6-cylinder is going into a Racecar, can I just cut out the entire engine shelf to maximize the available space in the engine compartment? Or, has anyone made a template that can be used to modify the 4-cylinder engine shelf to accommodate the 911 engines? I'd like just to remove the shelf parts if they are not needed. Thoughts on this? How do you other racers handle this. Many more questions to follow. I know there are many conversion threads out there, but it's hard to weed through them to see if they address the question(s) that I have. Plus most of Tigre are for street car conversions, not race cars.

Mike S.

[campbellcj]

I kept the shelf and tin in mine, and also the trunk floor, partly because I mainly drive on desert tracks with tons of dust and rocks, and partly because I've kept the car street-registered so I can occasionally take it to C&C's and shows. So far no issues but obviously it adds some weight and prevents the easier access. I do have a gutted out GT-style lid so the whole engine cover is just mesh and is removable.

Re twin-plug - I have the JB Racing dizzy and dual MSD boxes.

Totally agree re. keeping the oil cool and I have the stock engine cooler plus a large shrouded cooler up front with (IIRC) AN-12 lines in the tunnels. It's a Mazda Competition part from a long time ago with a screened front intake and it dumps out under the car. I've had the car on track at Willow Springs in >110F ambient with no issues. Oil tank and console setup is factory -6.

The recent PMS build sold on BaT vented the cooler into each wheel well which I thought was interesting and maybe not optimal re brake temps (?)