ok guys lets see what we can come up with i have a ecsb 4.8 with 104,000 miles on it and trans to, so what do you think the hp loss would be from a stock 2000 4.8?? Well in about 4 weeks i will let you know since i will be getting a dyno run done with and without the nelson tune. later, kevin

 

Do You Have Any Low Mileage Dyno Numbers? If Not, Then It Will Be A Little Hard To Really Know What You Lost Over The 104k Miles.

 

Heck, probably not too much. Just run a compression test to see what your cylinders are doing and maybe to check leak down. If they are high and you keep up with maintainence you probably haven't lost too much.

 

yeah....what he said.