15-03-2019, 11:18 AM
I agree. All the Newman cams I’ve seen rock at 110deg. Remember it’s far more important to have the valve closing late than opening early, so if you have to, err on the retarded side of this.
Another thing, with these new cams there’s precious little clearance between the cam lobes and the conrod of a 1.5in crank. You need to check this carefully. It’s not enough to check for free rotation at assembly, to avoid knocking noises at 5,000 revs the gap needs to be at least 30 thou. You might have to machine the rods slightly to achieve it.
Another thing, with these new cams there’s precious little clearance between the cam lobes and the conrod of a 1.5in crank. You need to check this carefully. It’s not enough to check for free rotation at assembly, to avoid knocking noises at 5,000 revs the gap needs to be at least 30 thou. You might have to machine the rods slightly to achieve it.
Alan Fairless