SBM Roller Lifter Choice

Wyrmrider said

so that's
XR274HR-10 camshaft, Hydraulic Roller Tappet, Advertised Duration 274/282,
Duration at 050 inch Lift:224 int./230 exh. Lift .538/.534, 110 LCA
you say 987-17
comp recommends
987-16 valve spring kit and 622-16 retainers with 1.6 rockers or 1.5 rockers
Valve Springs, Dual, 1.430 in. Outside Diameter, 344 lbs./in. Rate,
1.150 in. Coil Bind Height,
what height are you set up at? what retainer?
what are you running?
what's the difference???
are you running roller tip rockers? what rockers? ratio?
if so do you have a B3racingindustries kit - have you read all 4 tech articles on his website?
do you know the grind number of the cam (from the lobe list catalog?)
what oil are you running?

you have the Johnson tappet retrofit kit

Click to expand...

Nice
Cam and spring info you provided appears to be correct
I corrected the valve spring P/N to 987-16
Rocker arms are Comp Cam 1.5 ratio roller tip P/N? , they came with the heads in a parts swap
Do not have retainer info and installed height, part of a parts swap, heads had just been freshened up by a reputable engine builder. I really dont have a problem with the build other than the noisy hyd rollers that I supplied.
The engine runs very well, pulls like a freight train and has good driveablity.
The only grind number I have is off the cam card CRS XR274HR-10
Cam Serial number WY5940-16
Remember I am not an engine builder, I just like old cars.
Oil - Valvoline 10W-30
Have not read the B3 articles, I will put them on the list
Not aware the the Johnson retrofit kit, first I have heard of it, you can bet I will look it up.