| I've played about a lot with this, I have a 748 RS, 853 kit and every engine mod possible (really got carried away) 57mm full system worked best, 60mm was too much and the bottom end and mid range suffered.
On a 748R with 853 kit, flowed heads and de-restricted throttle bodies (the usual and most cost effective route) 54mm would be the biggest you could use. 50/54 half system works just as well though. |