Spec Boxster Build

[thstone]

Originally Posted by Greg Holmberg

I put the cost of tires, engine, fuel, brake pads, and gearbox at $351 per hour for Spec Boxster, and $263 per hour for SRF3. So about 25% less to run SRF3.

Operational costs of racing classes

And of course, if you have an incident, you'll spend a LOT more to fix the Boxster (as you know!).

Lap times are about 4 seconds per lap faster in SRF3 for laps around 2:00.

On the other hand, you can't drive the SRF3 to the track!

Greg

Great info Greg! Thanks for posting!

Looking through your data set, I'd love to drive a NASA NP-01...

[Greg Holmberg]

Originally Posted by thstone

Great info Greg! Thanks for posting!

Looking through your data set, I'd love to drive a NASA NP-01...

Yep, those look like great race cars!

https://nasaprototype.com

Built in the US by Elan, which builds professional-level formula and prototype cars.

Advantages:

• Top-notch design and construction.
• Toyo RR tires, which you're familiar with.
• Some downforce.
• A very safe, enclosed car.
• Operational costs are very low at $194 per hour: long-lasting reliable engine, uses pump gas, 20 HC tires.
• They have their own class with NASA.

Disadvantages:

• Purchase cost: $73,000 used.
• About the same speed as Formula F.
• Heavy for a purpose-built car (1725 lbs with driver).
• Not competitive in any other organization.
• Relatively few built, so the fields aren't very big.

I think the reason more haven't been bought is that the crowd that has the money for an $86,000 car (new), expect to go a lot faster. For that kind of money, you can buy an SCCA P1 car and go REALLY fast. Too fast for me personally (I've watched their videos, and it's scary!)--I'd be happy with FF or NP01 speed. I just don't have the $86,000!

I'd be curious what an NP01 costs to rent, given that the operational costs are so low.


Greg