I should have been more clear. Too much catalyst dissipates with an acrid, almost vomit type odor, often accompanied by a pinkish color shift and/or haze. This is a different smell than the normal outgassing of formaldehyde. In my opinion, companies that use a diluted catalyst are just trying to sell more product. A gallon of catalyst at 3% lasts a lot longer than a gallon at 10%. 3% ratios are not difficult to measure with reasonable accuracy.
Crew weight. There is a wide range of crew weights that is competitive in the Viper 640. The average of all crew weights at the 2015 North Americans: 550 lbs. Crew weights ranged from a low of 490 (#10) to a high of 650 lbs.
Knowing both your vehicleâs gross vehicle weight and gross vehicle weight rating allow you to quickly calculate how much you can safely carry. For example, take a look at the 2016 GMC Sierra 1500 4WD double cab with the EcoTec3 4.3L V6. The gross vehicle weight rating for this particular model is 7,100 pounds1. The weight of the Sierra itself is already 5,216 pounds. By subtracting the weight from the GVWR, you can determine this particular Sierra can carry about 1,884 pounds without exceeding its maximum weight rating.