Glasspacks on V8 289 - Ford Mustang Forum
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post #1 of 32 (permalink) Old 03-05-2011 Thread Starter
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Glasspacks on V8 289

Anyone running glasspacks on their 289 Mustang?

If so, what is your feedback.

Place them right after the H/X pipe or further down near the rear axle?

Will the glasspack length make any difference to HP/torque and sound/tone?

I am looking at Cherry Bomb, Flow Tech, and Jones glasspacks to run on my 66 289. I have OEM exhaust manifolds and 2 inch H pipe right now.
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post #2 of 32 (permalink) Old 03-05-2011
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The longer the glasspack the smoother/more mellow the sound is.
post #3 of 32 (permalink) Old 03-05-2011
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i think glass packs are awful. My opinion though.

1968, 302 .030 / Comp Cams Magnum 270h #31-414-3 501 lift @ .050 dur 224/224
Comp Cams Magnum Lifters and Pushrods Comp Cams 1.6 Full Roller Rockers
Edelbrock RPM heads (2.02 / 1.60) / RPM Air Gap
Holley Street Avenger 670 carb
Edelbrock 110gph Fuel Pump
Cloyes Street True Roller Timing Chain / Professional Products Harmonic Balancer
MSD Pro billet Dizzy, 6AL Box, Blaster 2 Coil
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post #4 of 32 (permalink) Old 03-05-2011
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I run Cherry Bomb glass packs on mine 289 271hp, you can hear it 1/4 to 1/2 mi away if you put your foot in it, can't hear the radio if the motor is running, I love it. Good Luck.
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post #5 of 32 (permalink) Old 03-05-2011 Thread Starter
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Quote:
Originally Posted by Pig Muffin View Post
i think glass packs are awful. My opinion though.
Yeah, I hear ya; glasspacks get a bad rap because of their unique sound; you either hate it or love it, no in between.
I just pulled off a pair of Flowmaster knock offs that was put on by the previous owner because they sound too much like what everyone else has.
I like to try and set myself apart from what everyone else has but at times that can be hard when you own Mustangs.

thanks for the input.
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post #6 of 32 (permalink) Old 03-05-2011 Thread Starter
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Quote:
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I run Cherry Bomb glass packs on mine 289 271hp, you can hear it 1/4 to 1/2 mi away if you put your foot in it, can't hear the radio if the motor is running, I love it. Good Luck.
rex1965,
What size/model Cherry Bombs you run?
My radio is already crappy, however, a great sounding and loud ride is music to my ears.
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post #7 of 32 (permalink) Old 03-06-2011
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Radio

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Originally Posted by cavc View Post
rex1965,

My radio is already crappy, however, a great sounding and loud ride is music to my ears.

I like the way you think - My radio is already crappy.

"Da Blue Car"

1966 Mustang Coupe 289
Arcadian Blue 205,000 miles -
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post #8 of 32 (permalink) Old 03-06-2011
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I don't know what number mine are I just measured what dimensions I needed, like the inlet and outlet I.D. , and the length of the body and total length, went down to the local auto parts and got them, they are always more mellow when first installed. They are installed right in front of the tailpipes. Good Luck.
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post #9 of 32 (permalink) Old 03-06-2011
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I have cherry bomb glass packs on my 66 and love the way they sound. I think glass packs sound bad on newer fuel injected mustangs.

98 cobra svt
00 mustang gt convert
71 mustang coupe 351c
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The previous owner installed glasspacks on my 67 with a 289. I dont mind the sound, but I think when I install my new exhaust in a couple of months, I will switch to some Flowmaster super 40s or 44s. Something deeper and fuller. That is unless someone has a better idea. Now that I have a more grown up motor, I want some more grown up exhaust. Cherry bombs remind me of 1985.

- Scooter

1967 Mustang (Lucinda) - 302, ported GT40 heads, Crane Cam, Edelbrock Perfomer 289 intake, Edelbrock 1406 carb, T5 5 speed, Trac-loc 3.73 8.8" CSRP Disc Brakes, HEI distributor, Other goodies.
- It's not leaking... It's sweating power -
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I have 30 inch Cherry Bombs, H pipe and side exhaust. It is not really all that loud. The sound is a deep tone and not a "Ricer Whine" you hear on some imports.
Also running Tri Y headers.
Pictures and order info: Exhaust

Good Luck and BE Safe
Ron

A code 66 coupe, Father~Son Restoration
289 4v, Roller Rockers, Electric fan
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Tri Y into 2.25 Shelby side exhaust
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When i got my car 10 years ago from the orginal owner, it had the shortest little red glasspacks ide ever seen. That thing was so loud you couldnt even hear yourself think. To be honest i think it screwed with the backpressure too. As soon as i found oem type mufflers and put them on, it ran way better and smoother too. it also caused ALOT of extra rattling inside the car. Had to retighten alot of screws on the trim pieces. I mean if you like it loud then thats your ticket. But be warned, it will grab alot of attention, even unwanted kind from the fuzz.

1966 Mustang 2+2, 289 c code/c4, Edel 600cfm/performer carb, intake/spacer,Comp XE250H Cam, pertronix igintor w/ coil, tri-y headers, dual factory 2"exhaust w/ H-pipe, flex fan, UDP's, windage tray, Grab-a-track Suspension, B&M shift kit, 2.80 w/track lock diff.

2004 Toyota Tacoma TRD Prerunner
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glass packs to me make hot rods sound like old farm truck or something.

1968, 302 .030 / Comp Cams Magnum 270h #31-414-3 501 lift @ .050 dur 224/224
Comp Cams Magnum Lifters and Pushrods Comp Cams 1.6 Full Roller Rockers
Edelbrock RPM heads (2.02 / 1.60) / RPM Air Gap
Holley Street Avenger 670 carb
Edelbrock 110gph Fuel Pump
Cloyes Street True Roller Timing Chain / Professional Products Harmonic Balancer
MSD Pro billet Dizzy, 6AL Box, Blaster 2 Coil
Flowtech Long Tube Headers
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I used to use the Thrush Glasspack mufflers back in the day when I was installing my own exhaust systems and they would just hang there before the rearend with no tailpipes. Used to get pulled over all the time by the cops for not having complete exhaust.
So you really don't want to know what I think about glasspack mufflers!:nogrinner

1966 Mustang Coupe
Ford Racing 5.0 HO Motor(Crate)/B303 cam/1.7 RR
TFS TW Heads/Edelbrock Perfor RPM/Holley 650 DP
Mallory Dist/MSD Blaster/Holley Electric Fuel Pump
2.5" Exh H pipe/Flowmasters 40's/Dr.Gas Tailpipes
Lakewood T/A Bars/Aluminum Drive Shaft + loop
Auburn 3.55's/SSBC disc's/C-4 wTCI 2800 stall
Fiberglass hood/trunk/bumpers!(100% Sicilian)
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post #15 of 32 (permalink) Old 03-09-2011 Thread Starter
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Quote:
Originally Posted by 66 restomod View Post
I have 30 inch Cherry Bombs, H pipe and side exhaust. It is not really all that loud. The sound is a deep tone and not a "Ricer Whine" you hear on some imports.
Also running Tri Y headers.
Pictures and order info: Exhaust

Good Luck and BE Safe
Ron
Ron,
Thanks for the pics and links. I was not thinking of side exhausts, only glasspacks/mufflers and turn downs just before the rear axle. You got me thinking now.

Cav
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