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#16
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Of course it will sound a bit louder without that mesh. A big part of that may be that there is more surface area throught the mesh to absorb or disperse sound waves that there would be with straight pipes. Also consider it like this....If your in a rather large pipe and you yell...it will seem alot louder than if you were outside. This is because the soundwave is reflected and channeled back to you rather than being dispersed.
Anyway, back to the topic on hand...You can always try it. I recommend replacing the cats with a staight pipe rather than trying to shell out the cat..that way if it doesnt sound good, you can just weld the pre cats back on if it doesnt sound good.
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R.I.P Cool Signature. You're gone but not forgotten. I mean, sure, I kindof don't remember some of the finer details..but I remember you were funny, and at one point you said spaghetti in Dutch....but definantly not forgotten |
#17
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I can't just weld the primary's back in... They are shot... When my old engine was in there, just after the rebuild process wos complete, they got cooked... I mean to the point of GLOWING a bright orange... After that, and after my new engine, I have been getting a slight reduction in power (just barely) and more rattling... I don't have any heat shields, so that is eliminated... The only thing that I could think (because my girlfriend was riding behind me when I roasted the cats last summer and saw chunks of glowing "metal" coming out of the exhaust) is that my CATS are shot... That is why I am examining some possibilities... As far as daily driving the car, I don't... Infact, I haven't driven the SVX in over 2 weeks... It is now my toy/autocrosser/weekend car... My Diesel VW is my daily driver and will continue to be (with fuel prices the way thatt they are).... Anyway, I would like to go with some form of CAT in the exhaust. I just don't know any good brands out there... The idea about punching out the CATS was really just me being courious of what it would sound like... Also, anyone know the diameter of the pipe to and from the Primary CATS??
Thanks guys
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2020 Subaru Outback Touring - Wife's first Subaru 2005 Volvo V70R - 5-cylinder love! :Heart: ** SOLD **1998 Subaru Legacy 2.5GT Wagon - MOST RELIABLE car I've ever owned ** SOLD **2006Subaru WRXSTi (Former "Boxer4Racing.com / Continential Tire" STi) - Built EJ22t block / EJ207 JDM STi "big port heads" - 9,000rpm MONEY PIT!!! ** SOLD ** 1995 "Tree-Hugger Green" SVX L AWD(5 MT) --- "Gumby" 130K miles #399 in MY95, my original love... |
#18
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People seem to be having the most success with the Magnaflow 2-into-1 cats. The 2-into-1 design seems to cause less resonance than a y-pipe followed by an inline cat, and the 2-into-1 cat has a larger brick so it should cause the least amount of flow resistance.
I've got a brand new one that I can sell you for a great price. Its been sitting in my garage collecting dust.
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Mychailo :: 2006 Silver Mitsubishi Evolution 9, E85, 34 psi peak, 425wtq/505whp DJ :: 1995 Laguna Blue SVX L AWD 5MT (sold) Visit my locker SVX Mods: ND iridium spark plugs, Impreza RS fpr, afr tuned to 13.2:1 using a custom MAF bypass, custom exhaust, WRX 5MT w/ STi RA 1st-4th gear & stock WRX 5th gear, Exedy 13 lb flywheel & Sport Clutch, STi Group N tranny & engine mounts, urethane spacers in rear subframe, rear diff mounts, and pitch stopper, SVX Sport Strut Springs (185f/150r), custom 19 mm rear swaybar, urethane swaybar mounts, Rota Torque 17x8", 225/45-17 Proxes 4 tires, Axxis Deluxe Plus organic brake pads. |
#19
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so mychailo do you suggest putting two resonators before the 2-1 cat to get rid of the resonance because it resonates really bad with just the 2-1. REally really bad and really really annoying. cause its right in the money rpms..Thanks for the help.
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#20
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Quote:
Yes, it will help quite a bit. Another cheap trick would be to make one primary longer than the other. I haven't tried it, but this could be more effective than the resonators. It would change the exhaust sound of the car though. It would probably sound a little rougher.
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Mychailo :: 2006 Silver Mitsubishi Evolution 9, E85, 34 psi peak, 425wtq/505whp DJ :: 1995 Laguna Blue SVX L AWD 5MT (sold) Visit my locker SVX Mods: ND iridium spark plugs, Impreza RS fpr, afr tuned to 13.2:1 using a custom MAF bypass, custom exhaust, WRX 5MT w/ STi RA 1st-4th gear & stock WRX 5th gear, Exedy 13 lb flywheel & Sport Clutch, STi Group N tranny & engine mounts, urethane spacers in rear subframe, rear diff mounts, and pitch stopper, SVX Sport Strut Springs (185f/150r), custom 19 mm rear swaybar, urethane swaybar mounts, Rota Torque 17x8", 225/45-17 Proxes 4 tires, Axxis Deluxe Plus organic brake pads. |
#21
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Quote:
Also, the exhaust diameter at the Primary CATS... Is it 1 7/8th inches??
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2020 Subaru Outback Touring - Wife's first Subaru 2005 Volvo V70R - 5-cylinder love! :Heart: ** SOLD **1998 Subaru Legacy 2.5GT Wagon - MOST RELIABLE car I've ever owned ** SOLD **2006Subaru WRXSTi (Former "Boxer4Racing.com / Continential Tire" STi) - Built EJ22t block / EJ207 JDM STi "big port heads" - 9,000rpm MONEY PIT!!! ** SOLD ** 1995 "Tree-Hugger Green" SVX L AWD(5 MT) --- "Gumby" 130K miles #399 in MY95, my original love... |
#22
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mbtoloczko How Much...
for your 2 into 1 cat? I'm getting ready to do an early Chike 2 into 1 into 2 exhaust system. And in Calif. I'll be smogged again in Aug. And I don't have a problem with clean air. Do you take Paypal?
By the way...thanks for all of your technical info. Very helpful and much appreciated. TRIED TO PM YOU BUT YOUR BOX IS FULL... WGJ Last edited by WGJ; 02-20-2006 at 12:44 PM. |
#23
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Mbtoloczko
Tried To Pm You But Your Box Is Still Full...
Wgj |
#24
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Try again. I cleaned it out this morning.
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Mychailo :: 2006 Silver Mitsubishi Evolution 9, E85, 34 psi peak, 425wtq/505whp DJ :: 1995 Laguna Blue SVX L AWD 5MT (sold) Visit my locker SVX Mods: ND iridium spark plugs, Impreza RS fpr, afr tuned to 13.2:1 using a custom MAF bypass, custom exhaust, WRX 5MT w/ STi RA 1st-4th gear & stock WRX 5th gear, Exedy 13 lb flywheel & Sport Clutch, STi Group N tranny & engine mounts, urethane spacers in rear subframe, rear diff mounts, and pitch stopper, SVX Sport Strut Springs (185f/150r), custom 19 mm rear swaybar, urethane swaybar mounts, Rota Torque 17x8", 225/45-17 Proxes 4 tires, Axxis Deluxe Plus organic brake pads. |
#25
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Doesen't anyone know of some good CATS that are High-flow and don't cost an arm and a leg???
Also, the measurement of the inlets and outlets of the primary CATS.... Anyone know that too???
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2020 Subaru Outback Touring - Wife's first Subaru 2005 Volvo V70R - 5-cylinder love! :Heart: ** SOLD **1998 Subaru Legacy 2.5GT Wagon - MOST RELIABLE car I've ever owned ** SOLD **2006Subaru WRXSTi (Former "Boxer4Racing.com / Continential Tire" STi) - Built EJ22t block / EJ207 JDM STi "big port heads" - 9,000rpm MONEY PIT!!! ** SOLD ** 1995 "Tree-Hugger Green" SVX L AWD(5 MT) --- "Gumby" 130K miles #399 in MY95, my original love... |
#26
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OEM primary cat outlet ID: 1.61" The Magnaflow ceramic substrate cats are fine. Metal substrate cats may flow better for a given brick size, but if you want better flow from a ceramic substrate cat, then get a cat with a bigger brick.
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Mychailo :: 2006 Silver Mitsubishi Evolution 9, E85, 34 psi peak, 425wtq/505whp DJ :: 1995 Laguna Blue SVX L AWD 5MT (sold) Visit my locker SVX Mods: ND iridium spark plugs, Impreza RS fpr, afr tuned to 13.2:1 using a custom MAF bypass, custom exhaust, WRX 5MT w/ STi RA 1st-4th gear & stock WRX 5th gear, Exedy 13 lb flywheel & Sport Clutch, STi Group N tranny & engine mounts, urethane spacers in rear subframe, rear diff mounts, and pitch stopper, SVX Sport Strut Springs (185f/150r), custom 19 mm rear swaybar, urethane swaybar mounts, Rota Torque 17x8", 225/45-17 Proxes 4 tires, Axxis Deluxe Plus organic brake pads. |
#27
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Do ya think that a CAT with a diameter of 2" would work on our stock pipes?? Found the cats that I want and they come in 1.75" and 2" sizes... Just wondering which ones would be best to get... Thanks
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2020 Subaru Outback Touring - Wife's first Subaru 2005 Volvo V70R - 5-cylinder love! :Heart: ** SOLD **1998 Subaru Legacy 2.5GT Wagon - MOST RELIABLE car I've ever owned ** SOLD **2006Subaru WRXSTi (Former "Boxer4Racing.com / Continential Tire" STi) - Built EJ22t block / EJ207 JDM STi "big port heads" - 9,000rpm MONEY PIT!!! ** SOLD ** 1995 "Tree-Hugger Green" SVX L AWD(5 MT) --- "Gumby" 130K miles #399 in MY95, my original love... |
#28
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Quote:
Harvey.
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One Arm Bloke. Tell it like it is! 95 Lsi. Bordeaux Pearl, Aust. RHD.149,000Kls Subaru BBS wheels. 97 Liberty GX Auto sedan. 320,000Kls. 04 Liberty 30R Auto Premium. 92.000kls. |
#29
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Quote:
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2020 Subaru Outback Touring - Wife's first Subaru 2005 Volvo V70R - 5-cylinder love! :Heart: ** SOLD **1998 Subaru Legacy 2.5GT Wagon - MOST RELIABLE car I've ever owned ** SOLD **2006Subaru WRXSTi (Former "Boxer4Racing.com / Continential Tire" STi) - Built EJ22t block / EJ207 JDM STi "big port heads" - 9,000rpm MONEY PIT!!! ** SOLD ** 1995 "Tree-Hugger Green" SVX L AWD(5 MT) --- "Gumby" 130K miles #399 in MY95, my original love... |
#30
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i have nothing to ofeer except this......
mine has no "pre-cats" and still has the stock exhaust the 2 pipes feed into one large cat then straight back to the muffler it sounds fine, with no resonances that i've noticed... (did cdn models only have the one cat? or is my exhaust not 100% stock?...it sure LOOKS fatory original....) ps.........after we got the tranny in, we started 'er up to see if it would even run(purchased as a basket case).....NO exhaust system....straight outta the manifolds!! and i'll +1 to the soundin MEEEEAN !!!! bwuhahahaahahaaaaaaaaa!!!!
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i'm too svxy for my car rob 92 ebony 4.44's rock !! |
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