MARKT111

Ever since I installed my 58 mm BBK my air intake is very loud,kind of a whistling turbulent sound,this can't be good air should flow smoothly,quietly right??

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89 FORMULA 350,WS6 SUSPENSION,HOTCHKIS STB,KONI REDS,WONDERBAR,SLP REAR CONTROL ARMS/PANHARD,POLY BUSHINGS,FRESH 355 MOTOR,TCI 12" STREETFIGHTER,TRANSGO SHIFT KIT,3.70 GEARS,FLOWMASTER EXHAUAST,SLP 1 3/4 HEADERS,NO CATS,58 MM BBK,MINIRAM INTAKE,COLD AIR,ALL FREE MODS

TAMECH

I also have the BBK58mm and it whistles, but quietly. I also was concerned of possible false air or leaks but a guy that I know thought a slight whistle at idle or just above was okay.

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1987 T.A.
4 bolt 40 over MSD 6al BBK/EDL throttle body Accel coil, wires Compu Cam Roller roc K&N filter Jet custom chip Removed screens and cooling fins on M.A.F. Ported Corvette heads 700r4 shift kit 40+ 4th gear 2300 stall Stock GTA rims with 255/50/16 rear 245/50/16 front Z rated comp ta's

Jason Aschle

Did you make sure to connect the vaccum hose to the underside of the throttle body? I have a BBK 52mm on my car and when I had first put it on, there was a loud whistle, almost sounded like a supercharger while driving, but I noticed that I had forgotten to re-connect the hose on the bottom. After I put the hose on, the throttle body makes no more noise other than it seems that the intake sucks alot harder when it is first started, after setting a while. I suppose the 58mm could be a little different, but I doubt it. Good luck...

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1991 Camaro ,polished TPI, 355ci. Sportsman 11 heads, LT-4 Hot cam,Pete Jackson gear drive, on,and on, and on... 13.6 @ 102.5 with a 2:73 open rear, no traction, no tuning, no practice. Car is pictured in Chevy High Performance magazine, June 2000 issue.

1985 California Edition IROC red, polished TPI and polished wheels, otherwise completely stock 305ci. 700r4

1991 fullsize Blazer 4-wheel drive, 350,700r4, Pro Comp lift, K&N, TBI spacer, 3" Catco cat, 3" cat back Flowmaster, etc....

Dave M

I have the stock throttle body on my car but made a homemade old air intake that leaves the air filter completely exposed rather than in that big bulky box GM puts it in. I also ported my plenum. Now, when the car's cold and the idle's higher, you can barely hear yourself think anytime you're standing within 10 feet of the car with the hood up, that's how loud the intake noise is. From inside the car, with the hood closed, you can detect a whistle, but not nearly as bad. Now I know why GM put those silencers on from the factory. They may kill performance but I can't imagine John Q. Public living with that intake noise day in and day out.
I imagine with the amount of air your 58mm throttle body is pulling in, you're going to hear all kindsof noise too.

Dave M
88 GTA

Nitro Don

I have a 52mm BBK T.B. that makes a loud sucking sound when I fire it up.
I heard all BBK's do this.
Nitro Don