MustangWorks.com : Ford Forums - View Single Post - Breaking in a hi-po 393 with flat tappet lifters

Stang_ROTY · 06-20-2002, 01:11 PM

I have 120 miles on the engine (since the new bearings were installed) and I haven't had the RPM's over 5K yet....light touching 5K only a couple times. Do I really need to put another 400 miles on it before I take it to the drag strip? I also should point out that I had 200 miles on the engine last year when I realized the bearings needed to be replaced. How much farther do I need to go before I can have fun?? When can I hook up the t-brake and get some results??

06-20-2002, 01:11 PM	#1
Stang_ROTY Registered Member Join Date: Feb 2001 Location: Berkshire County - Massachusetts Posts: 735	Breaking in a hi-po 393 with flat tappet lifters I have 120 miles on the engine (since the new bearings were installed) and I haven't had the RPM's over 5K yet....light touching 5K only a couple times. Do I really need to put another 400 miles on it before I take it to the drag strip? I also should point out that I had 200 miles on the engine last year when I realized the bearings needed to be replaced. How much farther do I need to go before I can have fun?? When can I hook up the t-brake and get some results?? __________________ Red 1993 GT Street Machine Best E.T. - 12.41/Best MPH = 108 Engine is a 1969 351 block w/393 stroker kit. Dynamic Roller Myte C4, 8 pt cage. Edlebrock Performer heads and Victor Jr. EFI, FRPP 30lb injectors & Cartech fuel system. MSD ignition. Sothside Machine bars & Sub-frames, adj. upper's, 3.73's, Koni rear shocks, much more