6.4psd916
New member
I run 30 front 17 rear in my 420's.
HP calculator puts it at 650 @ 7600. Not to bad for a slipping trans. 1/8th was .25 faster than I have done. So struggling on the top end. Same back half as my 12.55.
HP calculator puts it at 650 @ 7600. Not to bad for a slipping trans. 1/8th was .25 faster than I have done. So struggling on the top end. Same back half as my 12.55.