dumptube open losing power?

[calboi]

it takes more flow than you think to max out 2.5" exhaust, unless your pipe is maxed out you don't stand to gain much w/ an open dump. If you can use the dump to add volume into the main exhaust pipe at a higher velocity than the gas in the main exhaust pipe you'll accelerate the main exhaust stream and create a pressure differential.......................

huh

[Big J]

huh

my point exactly

[calboi]

my point exactly

ok so r u saying if u add exhaust gas to the main system from ur dump system u will gain velocity flow=gaining hp or it will hurt ur hp?

[Big J]

ok so r u saying if u add exhaust gas to the main system from ur dump system u will gain velocity flow=gaining hp or it will hurt ur hp?

depends on how much exhaust you have to flow, how big your piping is to begin with, and how well the size of your wastegate is matched to the size of your turbine, it's just another part of optimizing a setup/system. Most mild street setups running a 2.5-3" exhaust and low boost will benefit from a well placed recirc, 20-40psi, dump to atmosphere, it's too much volume to add back into the exhaust.