DR tire pressure

[WA08TC]

So the car only sees about 1-2k miles a year but more this year since I'm going to more meets and going to try my hand at the track. I have my AR1s in front and some MT DRs in the back. This 1 set will be my street/strip setup. With the car being 95% street driven anyone have recommendations or experience with pressures?

245/40/15 front. Currently at 16 was thinking 20.
275/50/15 was thinking 18-20 street and 15 strip.

Anyone?

 

[Ross]

You are in the right pressure range based on the tires I have tried.
15 seems low for autocross, but might be right for drag racing.
The chalk method may help you dial it right in.