Log In / Sign Up

Putnam Park Road Course

Greencastle, Indiana, USA
View maps as JPEGs here
Back to Map
MX-5 Miata
911 GT3 RS 4.0
Yamaha FZ1
F1 Car
1.77 MI
2.85 KM
full browser
Hide Tools
Double click or press Esc to exit full screen
Loading Map...
Loading markers...
*PLEASE NOTE* The racing lines and simulations shown here are based on a simplified analysis that does not incorporate 3D effects such as camber and elevation, track irregularities, or surface conditions. It assumes perfect grip and perfect pilot control. Always temper your approach to a racetrack with common sense and an awareness of your skill level. Be safe out there!
tags Tags allowed: <b> <em> <strike> <a>
Lap Times Explained

Each column represents a vehicle driven on different racing lines. For example, the first row of the first column is the time for the Miata driven on its own line. The second row represents the Miata driven on the Porsche's racing line, and so on. It is expected that when a vehicle is driven on its own line (large font) the lap time will be the quickest. Otherwise, Al has not done his job very well.

Line Miata GT3 RS Moto F1 beta
Miata 1'17.81 +0.59 +1.05 -0.28
GT3 RS +1.42 1'08.95 +0.08 +0.96
Moto +1.67 +0.31 1'10.75 +1.23
F1 +0.69 +0.90 +1.33 42.88

    No additional resources at this time.
Suggest a resource or video

Putnam Park Road Course

clear form max 500 characters

Resource Guidelines

You are welcome to suggest a resource for Putnam Park Road Course. Valuable resources include:
  • YouTube videos
  • Websites
  • PDFs
Resources which are excellent demonstrations or discussions of the racing line at this circuit will be added to the page. Thank you for contributing!

The Racing Line at Putnam Park Road Course

Opened in 1991, Putnam Park has established itself as a popular Midwestern circuit, and continues to make improvements targeting user-friendliness and safety. Many car and racing clubs hold annual events at this race course, and track day opportunities abound as well.

The racing line at Putnam Park is actually pretty simple with few ambiguities. It helps that apexes and exits are clearly marked with checkered kerbing, although it could stand to be laid out a bit more generously in several places. Flexibility in configuration is provided by two optional track sections, The Loop and Times Square, with Times Square having four potential routes. However, the vast majority of onboard footage has these sections omitted from the track layout.

Getting through Turns 1 and 2 quickly means keeping up enough speed to carry you all the way out on the corner exit. After exiting Turn 3, don't worry about taking a late apex at 4 - Al shows every vehicle staying close to the inside, with the Miata driving out earlier than the others.

Turns 5 and 6 also require carrying a lot of speed to ensure full use of the track. Everyone can be pretty much flat out at the Turn 6 apex, but braking for 7 begins shortly thereafter. Turn 7 is straightforward, with a central apex and full use of the track on entry and exit, as well as setting up for 8.

Turn 8 is problematic, because just about every single in-car video shows drivers entering very wide, staying wide, then finally swinging in to hit a late apex. There is some elevation and camber change going on in the latter half of this turn, but it's unlikely to require such a drastic difference in approach from the calculated optimal path. For all vehicles, the ideal line starts at the inside of the turn. There is no wide entry whatsoever. The Miata sticks the inside until about half way around when it begins to drive out. The high powered vehicles take a double apex, with the Motorcycle's line being the most extreme. Until this conventional bit of wisdom gets overturned, all we can do is take advantage of the huge passing opportunity opened up by this wide approach. With the suggested line you can brake later and get to the inside sooner, not to mention getting around the corner quicker.

The 9-10 sequence is interesting because to take it properly, you actually have to apex quite early at Turn 9, then gradually push the line toward the outside, reaching the left edge of the track before swinging back in for the Turn 10 apex. If you find yourself straightening the steering to get outside prior to Turn 10, you will probably benefit from rolling on the throttle sooner and letting the increased speed carry you out instead.

Honda S2000 on Street Tires for a 1'19.43

Founder's Notes

Sorry for the shaky video, but this is a really quick and a good demo of the racing line. The only thing I noticed was that the driver is staying wide while entering Turn 8, looking for a late apex.

S2000 in NASA TTC

Founder's Notes

Pretty sick laps here as well in this time trial. The guy in the grey car up front seems slightly insane..I like it! People sure do like that wide line through 8. Could it actually be faster? Nah! Actually at the 4:12 mark in the video you can see one instance where the grey car has the inside line and is visibly pulling away from the S2000.

Chris Adams NASA Spec Miata Race

Founder's Notes

Ok, this is getting kind of silly. 2:11 mark, watch the white car pull away while Chris takes his wide line through Turn 8.

Ryan Roberson Laps in an Exige S

Founder's Notes

Nice consistent laps here. Same comment about Turn 8. Give it a try, Ryan!

Cory Friedman Porsche 997 GT3 Cup 2009 PCA Race

Founder's Notes

Yeah, you notice that when the racing starts all this wide line through 8 BS goes straight out the window? In fact, the tight line is what closed the gap between Cory and the car that initially passed him (although his competitor's line was too wide all the way through).

Track Day on a 2007 R6

Founder's Notes

Ok, finally some motorcycle love. I notice that bikes are much less consistent than the cagers at hitting the apexes on this track. I would also note that in places where you find yourself straightening the bike up to get to the outside, you could have been carrying more speed through the turn. This is especially the case in the 5-6-7 sequence.

Ricardo Valdez on R6 in AMA Open Superbike Race

Founder's Notes

Wild ride from Ricardo, with some nice passes against bikes with big power advantages. Motorcycles much more rarely suffer from wide entry syndrome, I think partly because it's so much easier to pass, that vulnerability in those lines is much more quickly exposed. Ricardo stays glued to the inside through Turn 8 - it should be a bit quicker, and an easier line, to take a bit of a double apex instead.