My 517 C.I. pump gas 400 stroker motor ended up making 727 HP. at 7300 RPM with a set of Indy SR M.W. port heads and an Indy 400-3 intake with old Holley List 9375 Dominator non ultra carb on Oregon 91 octane pump swill It ran a best of 9.993 at 134.7 MPH corked up with the air cleaner on with me in the car weighing 3450 Lbs. on M/T 31x13x15 E.T. Street bias tires: boogie:
The camshaft was a Comp Cams custom solid roller made for someone else that I bought hoping and thinking it would work okay in that motor, it was 260 degrees @.050 on the intake lobes with .420 lobe lift and the exhaust was 266 @.050 with .409 lobe lift ground on a 108 LSA installed at 106 to 107 intake lobe center ( I degree all my cams at .050,.100 and .200 before and after max lobe lift, just to see how good the lobes are
)
I ended up using a set of Harland sharp roller lifters that check out to be 1.65 ratio at the valve retainers, they were sold to me by them as 1.60 ratio.
I check every valve for lift to make sure the rockers are all good
I put hundreds of 1;/8 and 1/4 mile passes on that car as well as over 3000 street miles having a lot of fun smoking the tries on the street almost at will: hammer: devil:
