New Intake - now it whistles....

Rich93GT · 03-22-2001, 12:41 PM

Im enjoying my new cobra intake and 65mm throttle body a lot. I am concerned with a "whistling" sound I hear at 3/4 throttle between 2000 - 3000 rpm. A lotta guys say that the Cobra intakes don't "whistle"...should I be worried?

------------------
Rich
Headers,cat-back,built AOD,3:55's
My 1993 Mustang GT page

[This message has been edited by Rich93GT (edited 03-22-2001).]

LX XLR8R · 03-22-2001, 12:46 PM

its not the intake its the TB..let me guess its a bbk..well those are most notorious for doin it but others do it as well..its cuz they drill the hole in the middle wrong..nothing is broken so dont worry

------------------
1987 black notch(ex 4 banger)
DSS 306 w/ main support...Elderbrock 6028 heads..gt-40 intake..24# injectors...70 mm tb..77 pro-m...accel 300+..mac full legnth..tremec w/ pro5oh...full MAC exhaust,off road h-pipe,long tubes, catback...ron davis radiator..subframes, control arms...CFDF II..o yea holley FPR sucks..dont buy one..
AIM=onesillynotch

Rich93GT · 03-22-2001, 05:51 PM

Yup BBK

poopstang · 03-22-2001, 10:56 PM

if it's a bbk it's an edelbrock and they whistle i've got two friends with bbk/edelbrock and they both whistle!

91evilstang · 03-23-2001, 02:04 AM

YEA BBK's do that i think its cool.When i buy a t/b it will be a bbk just for that reason.

------------------
speed is money.How fast you want to go?

Mean50 · 03-23-2001, 11:09 AM

I have a 70 mm bbk on a Holley intake and it whistles loud idling.

------------------
89 LX Coupe
306, 10:1 compression, Holley Heads, Intake, and Cam package, 70 mm Throttle body and Mass Air, 30 lb injectors, 255 lph fuel pump, 1 5/8" full length headers, Flowmaster 2 1/2" American Thunder Cat back system, Centerforce dual friction clutch, 4.10 gears
50-175 hp Nitrous Works kit, 5" Auto Meter Shift Light

Jeff Chambers · 03-23-2001, 11:35 AM

Don't rule out a vacuum leak though. I'd check it over closely and put a vacuum gauge on the tree to make sure that you don't have a leak. Just a 'been there, done that' recommendation.

------------------
Jeff Chambers
Trophy Stock #3
11.86 Seconds / 113.8 MPH
Chambers Racing Team

Rich93GT · 03-23-2001, 06:32 PM

Thanks everyone (I think). It's kind of embarrasing when someone who's not a car nut is in the passenger seat says "wow what is that noise" I try to explain that I payed $189 for that noise...

Jeff: sorry to sound stupid - "put a vacuum gauge on the tree" what and where is 'the tree'?

Rich
My '93 GT Page

03-23-2001, 06:41 PM

The vacuum tree is that little do-hicky on the firewall with all the vacuum lines running to it. Its on the driver's side of the engine bay and you'll see a large vacuum hose running from it down to the brake booster. Unplug one of the caps/hoses and put a vacuum gauge on it to read what kind of vacuum your motor is pulling. You can buy a pretty decent vacuum gauge at Sears for about $15 and its a good tool to have in the garage for diagnosing engine problems. With a stock engine you should be pulling at least 16 inches of vacuum at idle and probably more like 19 or 20 inches for a well running stock engine. Any type of aftermarket cam and your vacuum will start falling from there.

------------------
Jeff Chambers
T/S #3
11.86 Seconds/113.8 MPH
Chambers Racing Team

03-22-2001, 12:41 PM	#1
Rich93GT Registered Member Join Date: Dec 1998 Location: Hatfield, PA USA Posts: 114	New Intake - now it whistles.... Im enjoying my new cobra intake and 65mm throttle body a lot. I am concerned with a "whistling" sound I hear at 3/4 throttle between 2000 - 3000 rpm. A lotta guys say that the Cobra intakes don't "whistle"...should I be worried? ------------------ Rich Headers,cat-back,built AOD,3:55's My 1993 Mustang GT page [This message has been edited by Rich93GT (edited 03-22-2001).]

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03-22-2001, 12:46 PM	#2
LX XLR8R Dirk Diggler Join Date: Feb 1999 Location: SLOATSBURG, NY Posts: 1,931	its not the intake its the TB..let me guess its a bbk..well those are most notorious for doin it but others do it as well..its cuz they drill the hole in the middle wrong..nothing is broken so dont worry ------------------ 1987 black notch(ex 4 banger) DSS 306 w/ main support...Elderbrock 6028 heads..gt-40 intake..24# injectors...70 mm tb..77 pro-m...accel 300+..mac full legnth..tremec w/ pro5oh...full MAC exhaust,off road h-pipe,long tubes, catback...ron davis radiator..subframes, control arms...CFDF II..o yea holley FPR sucks..dont buy one.. AIM=onesillynotch

03-22-2001, 05:51 PM	#3
Rich93GT Registered Member Join Date: Dec 1998 Location: Hatfield, PA USA Posts: 114	Yup BBK

03-22-2001, 10:56 PM	#4
poopstang Registered Member Join Date: Mar 2001 Location: palmbayFL Posts: 184	if it's a bbk it's an edelbrock and they whistle i've got two friends with bbk/edelbrock and they both whistle!

03-23-2001, 02:04 AM	#5
91evilstang Registered Member Join Date: Mar 2001 Location: lafayette IN USA Posts: 48	YEA BBK's do that i think its cool.When i buy a t/b it will be a bbk just for that reason. ------------------ speed is money.How fast you want to go?

03-23-2001, 11:09 AM	#6
Mean50 Registered Member Join Date: Jan 2001 Location: Virginia Posts: 118	I have a 70 mm bbk on a Holley intake and it whistles loud idling. ------------------ 89 LX Coupe 306, 10:1 compression, Holley Heads, Intake, and Cam package, 70 mm Throttle body and Mass Air, 30 lb injectors, 255 lph fuel pump, 1 5/8" full length headers, Flowmaster 2 1/2" American Thunder Cat back system, Centerforce dual friction clutch, 4.10 gears 50-175 hp Nitrous Works kit, 5" Auto Meter Shift Light

03-23-2001, 11:35 AM	#7
Jeff Chambers Moderator Join Date: Aug 2000 Location: Milan, OH Posts: 2,699	Don't rule out a vacuum leak though. I'd check it over closely and put a vacuum gauge on the tree to make sure that you don't have a leak. Just a 'been there, done that' recommendation. ------------------ Jeff Chambers Trophy Stock #3 11.86 Seconds / 113.8 MPH Chambers Racing Team

03-23-2001, 06:32 PM	#8
Rich93GT Registered Member Join Date: Dec 1998 Location: Hatfield, PA USA Posts: 114	Thanks everyone (I think). It's kind of embarrasing when someone who's not a car nut is in the passenger seat says "wow what is that noise" I try to explain that I payed $189 for that noise... Jeff: sorry to sound stupid - "put a vacuum gauge on the tree" what and where is 'the tree'? Rich My '93 GT Page

03-23-2001, 06:41 PM	#9
jchambers Guest Posts: n/a	The vacuum tree is that little do-hicky on the firewall with all the vacuum lines running to it. Its on the driver's side of the engine bay and you'll see a large vacuum hose running from it down to the brake booster. Unplug one of the caps/hoses and put a vacuum gauge on it to read what kind of vacuum your motor is pulling. You can buy a pretty decent vacuum gauge at Sears for about $15 and its a good tool to have in the garage for diagnosing engine problems. With a stock engine you should be pulling at least 16 inches of vacuum at idle and probably more like 19 or 20 inches for a well running stock engine. Any type of aftermarket cam and your vacuum will start falling from there. ------------------ Jeff Chambers T/S #3 11.86 Seconds/113.8 MPH Chambers Racing Team