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.

[BillJ]

Quick question. Why a 2.8? For most groups that makes you too large for the 2.5 group and underpowered for the 3.0 rsr cars we race against....

I went from my 2.7rs down to 2.4 to race with that group.

[motorvated]

Quick question. Why a 2.8? For most groups that makes you too large for the 2.5 group and underpowered for the 3.0 rsr cars we race against....

I went from my 2.7rs down to 2.4 to race with that group.

This drivetrain simply found me and not the other way around, so that's why the 2.8 liter motor. I mostly race with RMVR here in Colorado and have been running with their Small Bore group of 2.0 liter and under. With the 2.8 liter I'll be running with their Mid/Big Bore group, as I would with a 2.4 or 2.5 liter motor. So not much difference unless I venture out and run with other Vintage clubs, which I do from time to time. As long as I have a few others to race against and I'm not running alone all the time, I'm happy.

[Charles Freeborn]

Quick question. Why a 2.8? For most groups that makes you too large for the 2.5 group and underpowered for the 3.0 rsr cars we race against....

I went from my 2.7rs down to 2.4 to race with that group.

This drivetrain simply found me and not the other way around, so that's why the 2.8 liter motor. I mostly race with RMVR here in Colorado and have been running with their Small Bore group of 2.0 liter and under. With the 2.8 liter I'll be running with their Mid/Big Bore group, as I would with a 2.4 or 2.5 liter motor. So not much difference unless I venture out and run with other Vintage clubs, which I do from time to time. As long as I have a few others to race against and I'm not running alone all the time, I'm happy.

I'm in a similar boat with my displacement at 2.6. SCCA VP2 is up to 3.2L so, I'm not likely to be very competitive - depending on the track.. Portland Intl, where I mostly run does not favor the better handling cars as it's fast and flat. That said, with run groups not being what they used to be, the VP1 cars (up to 1.9L) run in the same heats so there's always traffic (slower and faster) to play with.
The other vintage sanctioning bodies that run around here (SOVREN- Seattle based, and SVRA - Nationwide) would probably place me in some sort of GT class or another, not so much for displacement but for bodywork. Again, probably not going to podium, but there's lots of good racing to be had.