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Message: <blockquote data-quote="Veloc" data-source="post: 4545787" data-attributes="member: 92511">Hi...Not an expert in NA tuning here.. Got a few questions to ask... For others, feel free to add questions or contribute some experience.I am planning to get a Blacktop 20V in the future. Just want to ask regarding Na tuning for the engine.My first question for this thread is... Let's say, if I would to swap the camshafts for a 272 or 288 or even a 304 degree camshaft, how will the fuel consumption be like? Will the blacktop still be able to maintain the good FC as the stock camshaft or will it increase?I ask this because the blacktop utilizes VVT to activate/deactivate the high cams based on throttle position. So let's say if I swap it to a higher cam i.e 272 or 288 or even a 304 degree camshaft, will the FC be the same for city/normal driving since it will be running like a normal 16V engine without using highcams.For aftermarket camchafts for Blacktop 20V, do they just increase the lift and duration of the highcam lobes (VVT cam lobes) of do they do it to the normal low cam lobes as well?Because if they do it to the low cams as well, I'd expect that the FC & drivability wouldn't be able to remain the same. So I think I will not go for it ;)</blockquote>

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