Never been bolted on an engine. Here's what I was able to find via the internet. Engine Balance: External Safety Rating: SFI 18.1 Degree Markings: Yes Degree Marking Range: 360 Outside Diameter (in): 7.074 in. Harmonic Balancer Material: Steel Harmonic Balancer Construction: Elastomer Harmonic Balancer Finish: Black zinc chromate 3.200 in. bolt circle pulley mount. Steel 3-ring shell weight is 8.75 lbs. Steel hub average weight is 2.4 lbs
Not sure if the factory pulley lines up with those holes.. I know on a 455 the ati buick dampner requires a chevy pulley pattern. I was very bummed the 1 we tried used would had required almost 100 oz of weight in a location weigh physically could not be added to....the romac we used was much closer and actually wanted weight removed not added. I wanted to use the ati to get an easier access to a crank trigger kit, which nick helped me get over that hurdle
From ATI: Buick engines require mounting damper face forward of the OEM location to clear the timing cover for external balance dampers. Hubs may be machined on the crank gear end when using the shorter internal balance units to move the damper closer to the engine. 403-455 is .725” forward of the OEM location; 265-350 V8 and 252 V6 are 1.250” forward of the OEM location. This must be due to the 7"+ dia. instead of the 6-3/4" stock bal. dia.? Maybe the factory cast-in timing tab is in the way causing the additional forward mounting? Maybe cut the timing tab off, locate the balancer where it should be, fab up a tab mounted outside of the 7" dia.?
You would think........its almost as if the took chevy stuff and just machined the hub to somewhat fit and called it good enough
Interesting, I didnt know all this. I will set it next to a stick balancer and check the differences.
