So I just put on my Asp unsersrive pulley and tested my quartermile time with my phone (iPhone tests using gps and g forces) and I actually can't get it to run the same time as before and I got to thinking a heavier flywheel would make you go faster y would a lighterweight harmonic balancer make u go faster? I do understand the principal but maybe they counteracted eachother

 

I wouldn't put much faith in the accuracy of the iPhone software. Go get some real numbers at the track

 

x1000...i used one of those apps WHILE i was at the track and it said my truck ran 14.2 @ 100 mph when I actually ran 15.0 @ 91 mph.

 

dont think a balancer can make you slower.

 

Sometimes an underdrive pulley can cause false KR. If it trips several degrees, I could see you going slower however I do not feel this is your case. Please don't measure performance gains with an I-phone app.

 

I've heard this before too...what exactly happens to cause the false knock?

 

Yaw I k ow the numbers wouldn't be accurate but I figured sence my before st was 13.3 with the phone then after it was 13.4 with my phone I was just curious if anyone ever herd of it slowing me down when I get the thing dynoed I'm taking it to the track

 

too many other variables that will affect your times..ie: ambient air temp. air density, barometric pressure, etc..