Never had a dyno done and was curious what others have seen as actual HP on stock LS1 motor (2003 if it matters). I know what GM says, but wanted to see real life numbers?

:cheers:

Never had a dyno done and was curious what others have seen as actual HP on stock LS1 motor (2003 if it matters). I know what GM says, but wanted to see real life numbers?

:cheers:
Typically you should see around 300 to 325 and actually this would probably be around the higher side of things.

I dynoed at 301 RWHP stock, an auto is slightly lower yet.

I dynoed at 301 RWHP stock, an auto is slightly lower yet.
Yep, my auto dynoed at 290 (stock) that is why I needed to get some work done to it!! Matter of fact I still need to get some more mods done because in my opinion you can never have enough power!!

Yep, my auto dynoed at 290 (stock) that is why I needed to get some work done to it!! Matter of fact I still need to get some more mods done because in my opinion you can never have enough power!!

My stock 99 AT with Magnaflow exhaust dynoed 299.8rwhp w/ 309.6 ft-lbs torque. When he was finished I had 313.4rwhp w/ 323.7 ft-lbs torque. It was something I could feel right away. My wife stated, "Oh my god! I can definately feel the difference!"

I don't know if the 3:15 performance axle in mine made a difference in those numbers or not but When I raced my Dad in his 04 w/ 2:73 axle, I just walked away. That was before the tuning. After the tuning he didn't want any part of it. I have an LS6 intake on mine now just like the 01-04s.

295 -305 stock rwhp

295 -305 stock rwhp

:iagree: that is about the normal range for a stock motor with bolt on mods

Never had a dyno done and was curious what others have seen as actual HP on stock LS1 motor (2003 if it matters). I know what GM says, but wanted to see real life numbers?

:cheers:

The 2004 are 312 - 315 rwhp 318 - 319 max Torque with 2.73's
Change the rear to 3.42 loose 5 rwhp but gain in max torque and massive SOTP Grin.:lol: