| Dyno Numbers!!!
Ok here it is. I made some modifications to my truck today. I have a 2005 Duramax LLY that as of this morning was all stock. Before I did any modifications I went to the local Dyno shop and ran a stock HP and torque numbers. Then I left and went to cut out the stock mufler. I replaced it with just a straight pipe (less than $25 from NAPA). I went back to the Dyno shop and ran numbers with straight exhaust. Then I switched out the air filter to a K&N fliter. These are the three sets of numbers I posted:
Horsepower Torque
Stock 214 397
Straight Exhaust 211 326
Straight Ex w/ K&N 214 465
The manager of the shop stated that if you are not going to upgrade the computer then dont upgrade the exhaust. Since I have the Edge coming he said it would improve the function of the Edge. But I had a 3HP drop by eliminating the stock muffler. The K&N brought the number back up to stock with HP and surpassed the stock torque numbers. I ran each set of tests 3 times to make sure the numbers I posted are accurate. So hopefully some of you can use these numbers to improve your own truck. I will be putting a Corsa cat back system on as soon as the new shop opens around Nov. 1st. If anyone has any other suggestions or comments, please feel free to critique me.
Thanks
John |