Stephen Raab Posted February 16, 2014 Report Posted February 16, 2014 Ok so I have been messing around with Torres and the numbers just dont make sense to me. I am doing a box that is 17" tall x 40" wide x 12" deep. When using Torres if I make a port that is 15.5 tall x 2" wide x 20" long i get a tuning of around 35. To me it would be logical that if i take 2'' off the length and add it to the width, you still have the same volume so it would be the same tuning, however Torres tells me that the new tuning would be 52.33...... I dont understand this, is it just a flaw in the program or am I wrong in all of this. Also what is a good frequency to tune the box to for a daily ground pounder that may compete every once in a while. and if anyone wants to help me with some port dimensions for the box that would be awesome. Quote
BLuejoules Posted February 16, 2014 Report Posted February 16, 2014 (edited) Taking away from the length of a port and adding more port area to a port will make your tuning higher. 35-38 is a good range to go with. Edited February 16, 2014 by BLuejoules Quote IG: devinthydude
Stephen Raab Posted February 16, 2014 Author Report Posted February 16, 2014 I just dont get this at all, hopefully someone can explain.... I really dont want to run a 2" port.... it will look tiny next to a 15 Quote
BLuejoules Posted February 16, 2014 Report Posted February 16, 2014 You can increase the port area you will just have to lengthen the port to keep the same tuning Quote IG: devinthydude
CJ18 Posted February 16, 2014 Report Posted February 16, 2014 I wouldnt worry so much about the size of the port as long as the port area(about 15in2 per ft3) is there. The only other way to make it not be as skinny would be to shorten it, but then to do that, you may run into some dead spots in the box. You want a nice smooth airflow out of the box. Quote
Stephen Raab Posted February 16, 2014 Author Report Posted February 16, 2014 Well instead of going with a regular port Im thinking a round port may be easier and give a better look to the box. what do you guys think about this. Quote
Stephen Raab Posted February 17, 2014 Author Report Posted February 17, 2014 Ok so lets see if i got this right. If the box is 3.25 ft3 that means i would need 48,75 in2 of port volume. Using a 6" aero it would need to be 7.76" long. So if I made the port 7 3/4" long I should be good. Now is the length of an aero calculated from end to end of the flares? Quote
BLuejoules Posted February 17, 2014 Report Posted February 17, 2014 48.75 inches of port area. Dont worry about port volume. Quote IG: devinthydude
Stephen Raab Posted February 17, 2014 Author Report Posted February 17, 2014 wouldnt that be the same thing? how would you calculate the port area of a tube? Quote
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