When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
There is no average as not many people have the 300 hp car yet. I don't see it being much quicker if any quicker than the 287 in the 1320. I would say 14 flat is a good average.
A good average 1/4 mile time is around 14 seconds, like King Tut said. I would say a good 0-60 average would be around 5.5, since I've seen from 5.3-5.8.