ATK performance vortec 350

[atyates]

so I have a question. atk performance engines has a stock replacement long block with vortec heads. they say its for 97-2000 trucks. they say it produces 315 hp and 400 lb ft of torque. it uses factory fuel system, factory computer ect. what I want to know what could they have done to the motor to give it the extra power?

 

[cjman250]

Bored, cam, head work, etc it could be so many things

 

[atyates]

yeah but wouldn't that throw something off with the factory computer? they claim it doesn't require a tune.

 

[cjman250]

Not necessarily if it's a subtle change, my engine bored .030 and it doesn't throw a code or anything.

 

[polar]

The only thing that might throw the computer off is the cam.