![]() ![]() Dyno proven gains of up to +8hp Developed. ![]() I if you change them based on taller stacks and over shorter ones will give better response in one end and sacrifice for the other. But since this is not possible, many choose to do medium length stacks or two short, two long. 649.00 749.00 The EDR Performance R6 Velocity stack kit for the 2008-2022 models. I can speak for the 06 07 that the stock stacks are different heights to deliver an even response thought the entire rev curve. Theoretically, if you could have the momentum gaining abilities of long stacks and the short time and availablity that short stacks offer, that would be best. The air doesn't have to travel as far of a distance and there is less resistance. ![]() Because of this, short stacks allow air to be readily available right at the intake port. It may take more time for the charge to get to the cylinder but that is fine because at low rpms the valves are open for plenty of time to ingest the proper amount of air.Īt high rpms, things are moving much faster valves are opening and closing at much faster rates. I need to make some new velocity stacks for my individual throttle bodies as I had to break the last ones.I walk through each step I take to research, des. The reason for this is because at low rpms, the intake charge generally has a lower velocity so with long stacks it gives the charge time to gain momentum to fill the cylinder better and more completely. measure the inside diameter of them and measure the inside diameter of the stock ones and see what you come up with. Woodshoe was right in saying that long stacks do indeed improve bottom end power and short stacks are good for top end. Fn awesome for 6 bucks.:thumbup: velocity stacks seem to be a waste of money to me. Click to expand.I know this is a super old topic but I just wanted to verify the facts so that everyone gets the proper info. ![]()
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