Volocity stack design considerations??, for my mickey mouse ITB's Options

[Mueller]

Slightly warmed up /4 motor applications...I'm thinking just about any design better than none at all....I'd like to metal spin these myself, however if I can get a good price on 8 from a fellow non-club member, I'll go that route (IMG:http://www.914world.com/bbs2/html/emoticons/smash.gif)

[jsteele22]

I don't know why two stacks would give more airflow, but I guess there's a tradeoff : more surface area causes more drag (bad) but the additional stack does a better job of guiding the air into the tube without tumbling (good). Kind of like going from 16 lanes down to 4 after a toll booth : doing the merges in two steps seems to work a little better. Again, trial and error is probably the primary means to pick the best setup, and if that doesn't work, just go w/ carbon fiber.

About the length, the longer the tube the more air is moving in one direction at the same velocity. Like the marching band in Animal House, once the head of the column reaches a dead end (the piston) the rear of the column keeps pushing forward due to it's momentum. But long tubes also cause more friction, so at high RPMs it's mostly just a hindrance.

Since intakes don't run that hot, they can be made out of nice light, workable materials - the "test and chop" method sounds like a great way to go to find the perfect length. Exhaust systems, OTOH, have to be heavy, and therefore are a PITA when it comes to trial and error. It would be so nice to make up a test set of headers and exhaust out of, say, PVC pipe and run for ??? seconds before they melted through....