Truck rack " whistle " Advice needed

[john p]

I built a rack awhile back for my G.M.C. truck.Fit real nice,whistled better.Drove me near nuts.Capped everything that I could , Didn't work.I like the idea of lifting it . Will try when some snow melts.Still must be 5 feet in back yard.

[monte55]

If you can't get it to stop whistling, at least teach it a tune you can live with

[trevwelder]

Tack a piece of angle iron onto the front tube like this: []>

I tried that before i raised mine, didn't help. but I would be interested in knowing if helps him, mine were lower to the cab.

[tasslehawf]

I tried that before i raised mine, didn't help. but I would be interested in knowing if helps him, mine were lower to the cab.

I wonder if you had used circ. tubing if it would have made a difference.

[jweller]

Tack a piece of angle iron onto the front tube like this: []>

I'd do the same thing but add it to the back <[] so it looks more like a wing


thats just pure speculation though, either one of us might be right, or both of us wrong.

[dabar39]

If I remember correctly, I think my buddy Calweld (at least I think it was him) had the same problem with a rack on his truck, do a search or p.m. him and maybe you can find what was done to cure it.

[spotsineyes]

Hint: Do you know why car (truck) antennas have the wire spiraled around them?

[ace4059]

Hint: Do you know why car (truck) antennas have the wire spiraled around them?

that seems to help but they start whistling at about 140+mph, not to mention it was bent back almost all the way to the wind shield. but then again the entire car starts whistling through the doors at those speeds.


the headache racks on the back wind shields of trucks, what keeps them from whistling?

[Bert]

If you can't get it to stop whistling, at least teach it a tune you can live with

Awww...shucks! I just saw this thread...YOU BEAT ME TO IT!!!!!!!!!

[Bert]

Gonna build my first truck rack in 2 or 3 weeks (when my pipe bender comes in). My union instructor showed me things to look out for (all the racks on their trucks are all schedule 40 round pipe, round being stronger than rectangle or square stock):

Rule #1: Don't have your bar shorter than the top edge of your front window, sticking out a little is better. If it is exactly above it might be ok, but just a little behined, it'll start to whistle. Funny this thread came up about that! He said the air coming off the windshield hits the pipe and makes it whistle. You could make it higher, but we both agreed it doesn't look nice... He makes all his around 3" above the top point of the cab...
my .02 (pick it apart, but that's what I was told, and that's how I'm going to make my 1st pipe rack)