So I ran a 25 razor 4, not sure what to think about it since it was 97 degrees and humid as heck out, anyways, it was a bit different thats for sure, when I came out of the hole it didnt spool up at all, it seemed like it hesitated for a second or two, then just took off almost flat instead of the bow coming up and breaking over. I ran between 69.5-70 at about 5400 rpms, I'm not sure if thats because of the hot weather or what but I was thinking it would be around 5500-5600. I really want to run it when it's not so darn hot out to see if there's any difference.