[QUOTE=Frank L;5808801]I just broke in a powerhouse modded GRP .28 I will tune and race it this weekend. I am running it in a 8T 2.0 with 15/50 gearing. I am hoping to get more top and more low than the .21. I know on the box while heat cycling it sounded a lot meaner like it has a lot more grunt. We will see on Sat.QUOTE]

grp 28's are still very smooth with good top end, from the few iv seen...