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The 350 ran off an left the dually? Not surprised! Although when Popular Mechanics did their SUV shootout in about 1997 the 5.7L Tahoe and the 2500 454 Suburban they tested were fairly equal, within 0.1s in acceleration times and the 454 almost matched the 350 in observed fuel economy.
Highly recomeend a Vibrant merge Y for more torque.
There is no y pipe. It’s a 6.5 diesel. Has the crossover from manifold to manifold then the turbo. Then a down pipe from the turbo. Then the exhaust back
My 98 k2500 is nothing special by any means, but I was 100% surprised in the potential of that truck with just a tune. Granted, it already has a true dual exhaust and CAI, but getting it live tuned on 93 octane you could almost feel it pull harder with every degree of timing he added at WOT. Really woke that 454 up for what it is.
Was thinking 454. A few big block guys have used the setup.
Tuned my buddies truck. On 87 was not able to add a ton of timing but was able to squeeze in some small increases here and there that really helped it run better.
We started on 87 and added timing until there was spark knock, then backed it off a bit. It still made quite the difference but I decided the next day that I wanted to go for 93 and see what I could squeeze out haha.
