Originally Posted by
dhemi1
Hi all.
How do I tell what harmonic balancer I will need for my engine? What size will I need? Why do they have different sizes? Below is the rotating assembly I plan to use.
BTW, this is a Eagle rotating assembly
Crank: Cast
Rods: I-beam
Bearings: Clevite 77
Stoke: 3.750
Displ. @0.030: 383
Rod Length: 6.00
Pistons: -16cc SRP forged
Rings: Perfect Circle (file fit)
Compression Ratio:
@58cc:10.4:1
@64cc: 9.8:1 (This one)
@76cc: 8.7:1
Bore Sizes: std,.020,.030,.040,.060
*Internally Balanced* *Does not include flexplate (153 or 168 tooth) or dampener*
Thanks for your time,
-Chris.
Welcome to CHR. I think that you need to hook up your vacuum advance. At part throttle when cruising you have less air and fuel in each cylinder, and the air-fuel mixture is not as densely packed...
MSD 8360 distributor vacuum advance