|07-15-2008 11:17 PM|
|ericnova72||Redsdad, same thing I said in my earlier post in this thread, but apparently nobody wanted to hear it from me!?|
|07-15-2008 09:27 AM|
|n-gin||I have seen these holes drilled in newer vecals timing gears with square tooth belts. I have not seen any holes in the pulleys that use round toothed belts.|
|07-15-2008 06:50 AM|
|redsdad||n-gin hit it. The gears will whine regardless of the belt. However, once you reach a certain point, the belt whine will overshadow it. As many have said, the tighter the louder. But also, the wider the louder. A 3" will be louder than a 2". An old trick to quiet a blower down (yes there are folks who want to hear their stereo or carry on a conversation) was to drill holes in the pulley so the air would escape into the center of the pulley as well as out the ends of the cogs.|
|07-15-2008 06:29 AM|
it whines depending on how tight you make it.
hand tight give a little whine and is recommended by the MFG.
too tight and youll end up wearing out your alternator bearing.
|07-15-2008 06:24 AM|
Does the system you have on you car whine loud?
|07-15-2008 05:55 AM|
|07-15-2008 05:50 AM|
Were can I get one that belt systems you have. It looks way cool
|07-15-2008 05:48 AM|
Straight mess gears(spure gears), and air getting trapped under the belt will make a whine. The rock crusher (M22)trans had a whine to it due to the spure cut gears. Spure cut gears are stronger than angled(worm cut) gears. Worm gears are quiet but due to the worm style of cut, the gears are forced with a side load pushing out on the casing.
As for the tension yes that will make it louder. Though I dont believe the poeple with the superchargers or blower will sacrafice bearings to get a louder sound.
It just the nature of the beast to whine cause of the belt.
As far as the serpentine system making a whine there are spure cut gears in the housing to turn the other "rotor" or whatever the name is. That is were it is getting the whine from.
|07-14-2008 01:55 PM|
the whine is caused by air getting under the belt.
tighter you go the more whine you get.
I played with my belt drive quite a bit.
my camaro does it:
my 53 does it even louder:
|07-14-2008 11:11 AM|
|71gtx||So what would be a good price estimate to build a supercharged forged crank/piston small block chevy or mopar engine? Don't want to break my bank, this won't happen for a while, but my gosh how I love them superchargers.|
|07-11-2008 08:02 PM|
|Blazin72||I have a little 142 Weiand and it has a serpentine style belt. It also whines. I always figured it was the straight cut gears meshing with with each other as they spin. (?) You know, much the same as a camshaft gear drive whines.|
|07-11-2008 06:07 PM|
RCD Engineering has...
|07-11-2008 03:02 PM|
XNTRIC-T, I'm just repeating what I was told by tech at Blower Drive Service
(BDS) and it's basically word for word. The faster you spin it and the tighter the belt the more forcefully you are expelling the air, therefore the screech gets louder. You're right, belt pitch does affect this, the 1/2" pitch square tooth belt is louder than the 8mm rounded tooth. I was told if I wanted to lessen the whine to drill 1/16" holes in the grooves of the pulleys similar to the pattern on a cross-drilled brake rotor, this will allow more escape paths for the air. Some parts in automatic trannys are drilled the same way for fluid to escape, but for cooling reasons not noise.
Edit: The Vortech and similar blowers whine because there is a step-up gear drive inside them of around 4 to 1. There is one that is silent(Powerdyne, but I might have the name wrong) that has an internal wet belt step-up drive, and Paxton was using a planetary type ball drive at one time. These types are basically belt driven turbos and need 20,000+RPM to make boost.
|07-11-2008 02:55 PM|
And when you say that the tighter you make it (the louder it would get), the more risk for damaging bearings. So are guys naturally damaging their blowers just for that whine, or is a certain amount of tension and whine acceptable within specs?
By the way, nice paint job XNTRCI-T, never seen that before!
|07-11-2008 02:46 PM|
Here is where my "blower expertise" comes from...
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