Does your BBK Throttle Body "whistle"?

Stang_ROTY · 06-07-2002, 10:17 PM

Have you ever heard of BBK Throttle Body's needing a hole drilled into them (like carb's w/big cam's) when you run a large cam?? I gave my engine builder the phone # to FRPP's tech line and he got in touch with a dude at FRPP that runs a 393 stroker with a supercharer. Anyway, this guy gave him some good info (including the tip to drill the hole) and said that the edges on the BBK TB were too sharp and screw w/ the CPU at part throttle...plus make that whistle noise. My throttle body makes a whistle when I decelerate from a hard acceleration, something's wrong...

ballistic_331LX · 06-08-2002, 12:30 AM

i have 70mm TB and it whistles louders than a referee @ a basketball game. i had no clue what it was for about 2 months....then a buddy of mine asked if it was a BBK and i said yeah...he said thats the way they are....I said what a load of crap.......it whistles right off idle....at any speed......

shadowblue89 · 06-08-2002, 01:43 PM

I have a BBK 70mm TB and have a very slight whistle but nothing you can hear unless you really pay attention.

Hethj7 · 06-08-2002, 03:44 PM

My BBK 70 mm whistled when I had it too.

cyberstang5.0 · 06-10-2002, 07:15 AM

My 65mm and 75mm do the same thing.... I thought I had a vacume leak but I couldn't find it anywhere.

I wonder if I can roundout the edges of the butterfly, it will stop.

Forcedpower · 06-10-2002, 11:44 AM

My 70mm BBK whistles too. I've been thinking about getting a different brand b/c I hate the whistle!

mysweetlx · 06-10-2002, 01:42 PM

Mine whistles too. Either way it's ok w/ me., but if there's an easy way to make it stop....let me know.

joe4speed · 06-10-2002, 01:55 PM

Weird... I have a 65mm but have never noticed any whistling! hmmmmm

Stang_ROTY · 06-10-2002, 02:07 PM

My engine builder is in constant communication with a guy from FRPP tech that owns a 393 w/supercharger. This guy is telling my engine builder to drill a small hole (about a 1/4 in.) into the butterfly to help with the idle and he also rounded the edges to make the whistling stop. He did it and guess what....it still idles like crap and the whistling is still there. Now the damn thing fluctuates when I start her and is having a tough time finding the idle. I also noticed that the timing mark disappeared when I plugged the SPOUT plug in. I wonder why?

Mach 1 · 06-10-2002, 02:53 PM

Drilling a hole in the butterfly only serves to increase idle speed. I tried it and thats what happened...makes sense, just letting more air in.

I had a 70MM BBK and it never whistled. I now have a FRPP 65MM and recommend it over the BBK (much higher quality)

Ackbar00 · 06-10-2002, 03:26 PM

I got a 75mm BBK and it whistles too. Couple things i did HELP.. but dont get rid of it. First I adjusted my idle so it was around 750-800 Rpm. Made it noticably more quit. Second, clean out you idel air bypass with a heavy cleaner like a purple clean. I read a few post on this in the pass. An old post written by "MrClean" had some info in it as well.

Flamed95stang · 06-11-2002, 12:43 AM

Ive had a bbk unit on my car for almost 4 years now and have never once heard a whistle, but now that you guys mention it I will open up my ears a bit.

Stang_ROTY · 06-11-2002, 10:03 AM

The problem is that she won't idle at 900 due to the cam. She really loads up a stoplight at starts to choke at idle. 950 is better, I know it's not good for the tranny but what else can I do??

My biggest concern is this whistle/squeal I hear coming from the underside of the upper manifold (around the Edelbrock cover area). It doesn't make the noise right away...usually takes about 30 seconds after startup to occur. I tried WD40 and a torchtip but couldn't find a leak. Thanks for the tip on cleaning the valve....sounds like something I should try.

Quote:

Originally posted by Ackbar00
I got a 75mm BBK and it whistles too. Couple things i did HELP.. but dont get rid of it. First I adjusted my idle so it was around 750-800 Rpm. Made it noticably more quit. Second, clean out you idel air bypass with a heavy cleaner like a purple clean. I read a few post on this in the pass. An old post written by "MrClean" had some info in it as well.

Ackbar00 · 06-11-2002, 10:10 AM

Id say dont worry about it. Its kind of cool having different people asking what kind of supercharger i have. I just tell them its either a new F-4 or a XX trim.

Forcedpower · 06-11-2002, 11:01 AM

Flamed95stang nice sig.

Friend of mine his car does the same thing only his is worse than mine. I can't stand it sounds like something is wrong with your car.

Mach 1 · 06-11-2002, 11:21 AM

Quote:

Originally posted by Stang_ROTY
The problem is that she won't idle at 900 due to the cam. She really loads up a stoplight at starts to choke at idle. 950 is better, I know it's not good for the tranny but what else can I do??

Why is a high idle speed (950 isnt that bad by the way, mine usually idles around 1000, no big deal) bad for the tranny??

Stang_ROTY · 06-11-2002, 03:25 PM

I wouldn't mind it so much if my vacuum didn't fluctuate. WHatever the problem is it's causing me to fluctuate 2 inches of vacuum, from around 11.5 to 13-14 simultaneous with the whistle from underneath the upper manifold. This is all about 30 seconds after the engine runs.

Stang_ROTY · 06-11-2002, 03:29 PM

I was told by the guys at Dynamic Racing that the idle should be around 850-900. Harold @ Dynamic said it's just harder on the tranny internals to go from park to drive and drive to reverse @ higher idle speeds. But after what they did to the tranny on the dyno (it was amazing to watch) I find it hard to believe that ANYTHING under 900 HP would hurt this tranny.

Quote:

Originally posted by Mach 1

Why is a high idle speed (950 isnt that bad by the way, mine usually idles around 1000, no big deal) bad for the tranny??

PKRWUD · 06-11-2002, 04:05 PM

Just out of curiosity, are your valve springs okay with your new cam? Who adjusted the valves? How long does the vacuum needle jump 2 inches? Is it steady when that stops?

Take care,
-Chris

Stang_ROTY · 06-11-2002, 04:15 PM

[QUOTE]Originally posted by PKRWUD
[B]Just out of curiosity, are your valve springs okay with your new cam?
I was told by the people @ Edelbrock tech. that the valve springs should be okay with the cam. I'll call and ask again if you think I should.

Who adjusted the valves?
I assume my engine builder did the valve adjustment but I'll check with him tonight and get back to you.

How long does the vacuum needle jump 2 inches?
Split seconds. The needle jumps simultaneous with the whistle from underneath the upper manifold (appx. 30 seconds after the engine starts) and coincides with the idle fluctuation

Is it steady when that stops?
Yes it is. It was steady prior to the idle fluctuating also.

06-07-2002, 10:17 PM	#1
Stang_ROTY Registered Member Join Date: Feb 2001 Location: Berkshire County - Massachusetts Posts: 735	Does your BBK Throttle Body "whistle"? Have you ever heard of BBK Throttle Body's needing a hole drilled into them (like carb's w/big cam's) when you run a large cam?? I gave my engine builder the phone # to FRPP's tech line and he got in touch with a dude at FRPP that runs a 393 stroker with a supercharer. Anyway, this guy gave him some good info (including the tip to drill the hole) and said that the edges on the BBK TB were too sharp and screw w/ the CPU at part throttle...plus make that whistle noise. My throttle body makes a whistle when I decelerate from a hard acceleration, something's wrong... __________________ Red 1993 GT Street Machine Best E.T. - 12.41/Best MPH = 108 Engine is a 1969 351 block w/393 stroker kit. Dynamic Roller Myte C4, 8 pt cage. Edlebrock Performer heads and Victor Jr. EFI, FRPP 30lb injectors & Cartech fuel system. MSD ignition. Sothside Machine bars & Sub-frames, adj. upper's, 3.73's, Koni rear shocks, much more

06-08-2002, 12:30 AM	#2
ballistic_331LX Registered Member Join Date: Jun 2002 Posts: 28	mine does to... i have 70mm TB and it whistles louders than a referee @ a basketball game. i had no clue what it was for about 2 months....then a buddy of mine asked if it was a BBK and i said yeah...he said thats the way they are....I said what a load of crap.......it whistles right off idle....at any speed......

06-08-2002, 01:43 PM	#3
shadowblue89 Registered Member Join Date: Jan 1999 Location: Las Vegas NV Posts: 286	I have a BBK 70mm TB and have a very slight whistle but nothing you can hear unless you really pay attention. __________________ Charlie 89 GT 5spd

06-08-2002, 03:44 PM	#4
Hethj7 Mizzou Tigers Join Date: Apr 1999 Location: weston, MO United States Posts: 1,455	same here My BBK 70 mm whistled when I had it too. __________________ 2006 Mustang GT 1990 LX GT-40 motor 262 horsepower, 307ft-lbs (sold but forever loved) 1998 Contour SVT Rice Haters Club Member #244

06-10-2002, 11:44 AM	#6
Forcedpower Registered Member Join Date: Aug 1999 Location: Charlottesville, Va, USA Posts: 328	My 70mm BBK whistles too. I've been thinking about getting a different brand b/c I hate the whistle! __________________ 93 LX R331/AFR 205/Vic 5.0/? psi

06-10-2002, 07:15 AM	#5
cyberstang5.0 347ci of HORSE POWER!!! Join Date: Jul 2001 Location: Houston, TX Posts: 1,416	My 65mm and 75mm do the same thing.... I thought I had a vacume leak but I couldn't find it anywhere. I wonder if I can roundout the edges of the butterfly, it will stop.

06-10-2002, 01:42 PM	#7
mysweetlx Registered Member Join Date: Apr 2002 Location: New York Posts: 248	Mine whistles too. Either way it's ok w/ me., but if there's an easy way to make it stop....let me know. __________________ Damn this thing's fast!

06-10-2002, 01:55 PM	#8
joe4speed He said Member...heh, heh Join Date: Sep 1999 Location: Jupiter, Florida U.S.A. Posts: 3,718	Weird... I have a 65mm but have never noticed any whistling! hmmmmm __________________ *Joe!* 1988 GT, 13.58@101mph Check out my listing! Click here! Or my website:www.joe4speed.com

06-10-2002, 02:07 PM	#9
Stang_ROTY Registered Member Join Date: Feb 2001 Location: Berkshire County - Massachusetts Posts: 735	My engine builder is in constant communication with a guy from FRPP tech that owns a 393 w/supercharger. This guy is telling my engine builder to drill a small hole (about a 1/4 in.) into the butterfly to help with the idle and he also rounded the edges to make the whistling stop. He did it and guess what....it still idles like crap and the whistling is still there. Now the damn thing fluctuates when I start her and is having a tough time finding the idle. I also noticed that the timing mark disappeared when I plugged the SPOUT plug in. I wonder why?

06-10-2002, 02:53 PM	#10
Mach 1 Registered Member Join Date: May 1999 Location: Georgia Posts: 3,866	Drilling a hole in the butterfly only serves to increase idle speed. I tried it and thats what happened...makes sense, just letting more air in. I had a 70MM BBK and it never whistled. I now have a FRPP 65MM and recommend it over the BBK (much higher quality) __________________ 2002 GT 1993 GT (SOLD) '93 Mustang GT RHC member #142

06-10-2002, 03:26 PM	#11
Ackbar00 Rebel Fleet Commander Join Date: Oct 2001 Location: Huber Heights, OH Posts: 1,003	I got a 75mm BBK and it whistles too. Couple things i did HELP.. but dont get rid of it. First I adjusted my idle so it was around 750-800 Rpm. Made it noticably more quit. Second, clean out you idel air bypass with a heavy cleaner like a purple clean. I read a few post on this in the pass. An old post written by "MrClean" had some info in it as well. __________________ 1993 Mustang GT, PTK w/ T-64 - My Cardomain Webpage 11.25@123.5 on only 8 psi. 10.84@121 on only 1 headgasket "The Truth is, Your the Weak, and I am the Tyranny of Evil Men!"

06-11-2002, 12:43 AM	#12
Flamed95stang Registered Member Join Date: Jun 2002 Location: colorado Posts: 15	Ive had a bbk unit on my car for almost 4 years now and have never once heard a whistle, but now that you guys mention it I will open up my ears a bit. __________________ MODERATOR AT WWW.COLORADOSTANGS.COM Cobra upper and lower intake, bbk 70mm throttle bodie, mac cold air kit, bbk/walbro 190lph fuel pump, pro m 75mm bullet mass air meter, jet computer chip, bbk lowering springs (1.5"), D&D adjustable upper rear controll arms, Indexed spark plugs, gripp caster/camber plates, under drive pullys, msd 6al ignition, msd blaster coil, taylor 10.5mm plug wires, bassani exhaust with an x, saleen ceramic headers, 3:73 gears, E-303 cam,1.6 roller rockers, aeromotive adjustable fuel pressure regulator, cobra r clutch, 180 thermostat, manual fan on/off switch (high), msd shift light, autometer volt, water and air/fuel carbon fiber, everything inside car, white faced guages, hurst pro 5.0 shifter, Pro-M Remote Optimizer And finally a new trans so now I can race again Next up, some suspension work. Working on traction issue 1/4 mile- 14.85@91mph at 5800ft above sea level 60'- 2.12 1/8 mile 9.52@72mph Just some fyi, my times would be about this at sea level: 1/4 mile- 13.6 60'-1.8 or 1.7 1/8 mile- 8.2

06-11-2002, 10:10 AM	#14
Ackbar00 Rebel Fleet Commander Join Date: Oct 2001 Location: Huber Heights, OH Posts: 1,003	Id say dont worry about it. Its kind of cool having different people asking what kind of supercharger i have. I just tell them its either a new F-4 or a XX trim. __________________ 1993 Mustang GT, PTK w/ T-64 - My Cardomain Webpage 11.25@123.5 on only 8 psi. 10.84@121 on only 1 headgasket "The Truth is, Your the Weak, and I am the Tyranny of Evil Men!"

06-11-2002, 11:01 AM	#15
Forcedpower Registered Member Join Date: Aug 1999 Location: Charlottesville, Va, USA Posts: 328	Flamed95stang nice sig. Friend of mine his car does the same thing only his is worse than mine. I can't stand it sounds like something is wrong with your car. __________________ 93 LX R331/AFR 205/Vic 5.0/? psi

06-11-2002, 03:25 PM	#17
Stang_ROTY Registered Member Join Date: Feb 2001 Location: Berkshire County - Massachusetts Posts: 735	I wouldn't mind it so much if my vacuum didn't fluctuate. WHatever the problem is it's causing me to fluctuate 2 inches of vacuum, from around 11.5 to 13-14 simultaneous with the whistle from underneath the upper manifold. This is all about 30 seconds after the engine runs. __________________ Red 1993 GT Street Machine Best E.T. - 12.41/Best MPH = 108 Engine is a 1969 351 block w/393 stroker kit. Dynamic Roller Myte C4, 8 pt cage. Edlebrock Performer heads and Victor Jr. EFI, FRPP 30lb injectors & Cartech fuel system. MSD ignition. Sothside Machine bars & Sub-frames, adj. upper's, 3.73's, Koni rear shocks, much more

06-11-2002, 04:05 PM	#19
PKRWUD Junior Member Join Date: Mar 1999 Location: Ventura, California Posts: 8,981	Just out of curiosity, are your valve springs okay with your new cam? Who adjusted the valves? How long does the vacuum needle jump 2 inches? Is it steady when that stops? Take care, -Chris __________________ Webmaster: Rice Haters Club Jim Porter Racing Peckerwoods Pit Stop Support Your Local RED & WHITE!

06-11-2002, 04:15 PM	#20
Stang_ROTY Registered Member Join Date: Feb 2001 Location: Berkshire County - Massachusetts Posts: 735	[QUOTE]Originally posted by PKRWUD [B]Just out of curiosity, are your valve springs okay with your new cam? I was told by the people @ Edelbrock tech. that the valve springs should be okay with the cam. I'll call and ask again if you think I should. Who adjusted the valves? I assume my engine builder did the valve adjustment but I'll check with him tonight and get back to you. How long does the vacuum needle jump 2 inches? Split seconds. The needle jumps simultaneous with the whistle from underneath the upper manifold (appx. 30 seconds after the engine starts) and coincides with the idle fluctuation Is it steady when that stops? Yes it is. It was steady prior to the idle fluctuating also. __________________ Red 1993 GT Street Machine Best E.T. - 12.41/Best MPH = 108 Engine is a 1969 351 block w/393 stroker kit. Dynamic Roller Myte C4, 8 pt cage. Edlebrock Performer heads and Victor Jr. EFI, FRPP 30lb injectors & Cartech fuel system. MSD ignition. Sothside Machine bars & Sub-frames, adj. upper's, 3.73's, Koni rear shocks, much more

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