Ok Mat ...damn it i have to agree with you! So let me understand this...The reason they lower compression reliability slightly goes up....agree?if u have stock or high compression, u must tune to be safe....i agree.Tuning is alot of money,and dyno runs are not cheap,lowering compression is a tradeoff...kinda. Since you got me to understand it ...i think i'd take a properly stock internal 15psi TUNED b16, over a forged piston lower compression UNTUNED motor in a heartbeat.If you have a built bottom you don't really have to tune it so its not always necessary. But for maximum efficiency u must tune for highest boost possible with highest reliability.u should tune. it's playing against the odds without tuning and boosting.if u spend $$$$$$ on a built block must $$$$ to take full advantage on tuning.Tuning will produce numbers (dyno& track) as well as protect your investment...bring the reliability factor higher LACK of tuning...and improper fuel management *WILL* kill an engine. Well now i understand that you can boost on a high compression motor.
