Originally posted by dcairns@Oct 13 2003, 03:49 PM
The gain sounds about right. Going from 279 HP to 403 HP is a 44% increase. I was not able to dyno my truck to do a before and after, since I could not find an AWD dyno big enough. I am able to compare EFILive logs with a stock SS and this is what the chart looks like. The HP numbers on the graph are derived from the torque reported by the trucks computer and logged with EFILive. While the numbers are good for comparing two vehicles that are the same type, I would take the absolute numbers with a grain of salt. Interestingly, the stock HP seems lower than I would think and the supercharged HP is higher than I would have thought. Chevy rates the 6.0L LQ9 engine at 345 HP and I was thinking that I was getting 470 with the supercharger. The chart says more like 320 stock and 510 supercharged.
The increaes is not unreasonable but where the numbers begin seem to be to me.

A stock 5.3L making 279hp at the reas wheels. That's ls1 teritory.

doesn't it?