Relatively stock Nissan VK56VD dyno
04-05-2017, 06:23 AM
#11
I finally saw a dyno video of one and it put down 310 at the tire bone stock and something like 340 ft/lbs of torque.
I just changed up the exhaust on the M56. Removed the secondary cats, factory Y, resonators, and rear mufflers. Dual 2.5" from the manifold cats, to a X pipe where the factory pipes split after the Y into the resonators, then magnaflow magnapaks where the resonators once were and 2.5" pipes to the factory exhaust tips I cut off the factory mufflers and opened up enough to fit the 2.5" pipes. Sounds VERY mean now and power is up across the whole rpm range. I have not even touched the tune yet but I got on it on an on-ramp that I usually can hit 70 mph by a specific marker in the road and was doing nearly 80 mph when I hit that point. It is up a good 40+ hp from exhaust work alone. Will get another dyno someday soon to know where it stands but it pulls very noticeably harder, especially in the 2,500-6,500 rpm range. Even part throttle kickdown at 70 with the tach at 2,500 rpm it pulls noticeably more responsively. This 11.5:1 5.6 loves to breathe and the factory straw like exhaust was just not cutting it. I left room at the rear where the factory mufflers were to add vibrant resonators or a pair of 14" large case magnaflows to tame it down even more but at this point I love the sound even if it is a bit loud and aggressive. I kept hearing how much low-end torque it would lose, but it knocks the back tires off practically at will through first gear and I am running taller/wider than stock P275/40R20s on the back.
https://www.youtube.com/watch?v=vIRBIR19A1o
https://www.youtube.com/watch?v=XUAP5UjgWxg
I just changed up the exhaust on the M56. Removed the secondary cats, factory Y, resonators, and rear mufflers. Dual 2.5" from the manifold cats, to a X pipe where the factory pipes split after the Y into the resonators, then magnaflow magnapaks where the resonators once were and 2.5" pipes to the factory exhaust tips I cut off the factory mufflers and opened up enough to fit the 2.5" pipes. Sounds VERY mean now and power is up across the whole rpm range. I have not even touched the tune yet but I got on it on an on-ramp that I usually can hit 70 mph by a specific marker in the road and was doing nearly 80 mph when I hit that point. It is up a good 40+ hp from exhaust work alone. Will get another dyno someday soon to know where it stands but it pulls very noticeably harder, especially in the 2,500-6,500 rpm range. Even part throttle kickdown at 70 with the tach at 2,500 rpm it pulls noticeably more responsively. This 11.5:1 5.6 loves to breathe and the factory straw like exhaust was just not cutting it. I left room at the rear where the factory mufflers were to add vibrant resonators or a pair of 14" large case magnaflows to tame it down even more but at this point I love the sound even if it is a bit loud and aggressive. I kept hearing how much low-end torque it would lose, but it knocks the back tires off practically at will through first gear and I am running taller/wider than stock P275/40R20s on the back.
https://www.youtube.com/watch?v=vIRBIR19A1o
https://www.youtube.com/watch?v=XUAP5UjgWxg
Stalking and being a predator is illegal in 50 states. If I ever caught someone taking pictures of the underneath of my vehicle, castle doctrine is in full effect.
04-10-2017, 07:34 PM
#13
TECH Enthusiast
Thread Starter
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Auburn247 (04-10-2017)
04-11-2017, 03:23 AM
#15
TECH Enthusiast
Thread Starter
Those engines are traditional port fuel injection and do not suffer the same carbon buildup a direct injected engine like my M56 does. So you sir take that **** out of my thread!!!
06-15-2017, 05:18 PM
#16
TECH Apprentice
