[SS Engine Guy]

. The +/- 5lbs. can be the difference of whether I launch straight and stay in the groove. I have lost a couple thou. on a good track with a narrow groove to as much as .05 on a greasy hot track with bald spots. Placement of the car on the line is always important and i want to look at all the first 60 ft. The reason I was eager to learn about weight bias and scales was because some starting lines change from round to round so bad I was loosing races due to traction. Not a complete spin but not a perfect hook either. By the way, all the data logging and add on stuff is hung as high and far back in the car as possible. I wouldn't have thought it possible either until it was proven to me. I have been able in the past 10 years to use all the torque on the starting line that i can make where in the past I was detuning to make the launch better and possibly a little straighter.
I am in agreement with you guys. I read the rule same as most i guess and figured that aluminum was legal in the old cars. I also don't think that the reduced weight from an aluminum housing in most cars would mean anything et wise but in some cars a little can mean alot when races are won by thousanths. Especially in a heads up. I also don't think that using 3 quarts of zero weight picks up everything but i see that done alot. If the engine is built to utilize the reduced windage and stay together I see a tenth.