hi i was wondering if any of you guys and girls have ran these on a forced induction set up?

89 crx,b18b,t3/t4

 

Yes they sound sweet on my 69 Road Runner with 4 on the floor.

 

cool

 

Put a glasspack too close to a heat source (turbo or catalytic converter), and you'll only have a "muffler" temporarily as the heat blows out the glass, leaving a nice echo chamber / megaphone in its place.

I found this one out the hard way. 1979 Triumph Spitfire, 4-1 header, cat, glasspack, split, glasspacks, tips. My middle glasspack turned hollow in about 3 months, shooting sparks of burning glass out the tips on WOT pulls while it did so.

Just something to consider when choosing a fiberglass packed muffler.

 

lol, really lol...

 

my cat is gutted will that make a difference on heat?

 

Yes.

A gutted cat is already an echo/expansion chamber and nothing more. It should (in theory) cool the exhaust slightly as it passes through. A working cat will heat the exhaust passing through it from the final burning of unburned fuel.

I believe that somewhere in the range of 300*F increase in temp is not uncommon, but please don't take that number as gospel, just what I think I remember from reading.

No clue what actual temp is damaging to glasspacks, and every brand will be different (I would assume anyway). My 2nd stage of glasspacks (after the rear axle) seem intact after 15 years of use, but the one immediately following the cat blew out quickly.

 

bump

 

well just to chime in, i used a glass pack as a resonator on my ek hatch when it had a turbo setup, it sounded real good in conjunction with my greddy sp2.

 

anyone know about gibson, or borla exhausts tons of guys seem to have them?

 

what about magnaflow, or gibson catbacks I hear a lot of good stuff about them?