I am planning on getting a tune very soon at Lethal Performance in San Antonio. i have a 99 z28 m6 with LT's, custom exhaust,slp cold air w/lid, mild cam, stage 3 spec clutch and lots of suspension work. i have never gotten a tune on this car since i have had it in the last 2 years. i think it runs a bit rich right now. the internals on the car were done before i got it so i cant say for sure what kinda cam is in it or if it has a chip or not but the idle is not rough at all it is still very calm. what kinda gains can i expect to see from getting my car tuned on the dyno? i am also getting my fans programmed to come on sooner and am adding a 160 stat. i am already walkin on stock C5's and have taken a Z06 before so my educated guess is that im runnin close to 400hp.if i am running agaisnt these kinda cars and beating them would yall think that there is also some head work done to the car? i also ran another camaro that said he dynoed at 385hp and i pulled him as well. im just wondering if i am going to notice a significant difference or not?

 

Better driveability as well as more power. I gained 30rwhp in dyno tuning alone with my cam-only setup.

Mike

 

You may notice a difference but it will be a difference in your power curve and reliability of your power. With your mods I am guessing 375 for your power number after the tune.