Actually yes I did notice a small drop on low end torque. The difference would have been much greater if I would have used flow tech headers because they have much larger tubes. But once the mill rev's over 2 grand it's whole attitude changes. Take it even higher to 4 grand the sound changes from a rumble to a bark and you better hold on. With the tri-y's at around 2500 rpm I began to feel a loss of ump. But they were much better for around town below 2 grand driving. The idle and acceleration sound went down also but went deeper with sound of exhaust gases scavenging.
Oh yes better study...test next week.lol(chemistry)
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67'fastback-Edelbrock carb,intake,cam,valve springs.Rhode lifters, CompCam rocker arms, windage tray,cerama coated headers,dual flows with H-pipe, modded c-4,tci stall converter,perma cool electric fan,aluminum water pump,griffen aluminum radiator,accel 8.8 cable,wide cap distriburator,magnetic pick up,v-matic hurst shifter,edelbrock performer nitrous, carter electric fuel pump,ignitor coil,solid motor mounts,magna racing suspension,poly urathane bushings,under rider traction bars, comp. eng. s