no it's not a 1 second difference. <img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/wink.gif" border="0" valign="absmiddle" alt='

'> if that were the difference between 15 hp, if you added 15 horsepower to a DOHC, you'd be running 14's. my SOHC hasn't lost to a DOHC. but if i had a choice, i'd go with a DOHC if i had to do it again. more turbo kits.