[Doug Axelrod]

Could very well be the starter heat saturating. When this happens, it feels like the timing is off, but it's not.

This happened to me at VIR after trying to restart right after a hard run. With cooling, it started fine.

The options are a larger starter or a heat shield. I had one fabricated by Eric at Competition Motorsports in Ross, OH (he does kevlar heat shielding "diapers" for Indy cars!) and we'll see how it does at the track in the Spring. Reasonable, too.

So, easiest fix is a shield to see if this fixes it.