Quick Question about GUTTING CATS.....
Thread Starter
Melting Slicks
Joined: Jan 2002
Posts: 2,784
Likes: 3
From: Atlanta GA
Quick Question about GUTTING CATS.....
Hey All.... Before I get started I just want to say... I dont have to worry about passing emissions... So dont worry about that....
Now Im going to Gut my Pre-Cats... I want to see how much of a difference it will make... If it doesnt make that much of a difference, I think Im going to go with a True Dual Set-up... Anything I should know or do? Will I get more of a gain if I cut them out and weld pipes in there place? How much power should I be looking to gain with doing this? Im going to do this tomorrow.... Any advice or imput would be great.... Thanks all :cheers:
Now Im going to Gut my Pre-Cats... I want to see how much of a difference it will make... If it doesnt make that much of a difference, I think Im going to go with a True Dual Set-up... Anything I should know or do? Will I get more of a gain if I cut them out and weld pipes in there place? How much power should I be looking to gain with doing this? Im going to do this tomorrow.... Any advice or imput would be great.... Thanks all :cheers:
Le Mans Master
Joined: Jan 2002
Posts: 5,320
Likes: 4
From: Kyle TX (Because Mojo Made me fill it in)
Re: Quick Question about GUTTING CATS..... (StealDads67)
I just had my precats cut out yesterday. Mine were already hollow when they came out. I didnt notice any SOTP power gains, but my gf did mention that the vette's exhaust sounded lower and meaner. :D Based on that bit of info, Im REALLY considering going with headers soon. My main cat was also hollow when I had the rear Y replaced, so it looks like the previous owner may have done some cat cutting.
Team Owner
Joined: Dec 2000
Posts: 21,094
Likes: 282
From: Phila., PA burbs
Re: Quick Question about GUTTING CATS..... (StealDads67)
I have a '91 also and I've gutted my main cat and installed a SS front y-pipe without the pre-cats. I did a number of other small mods at the same time, but the combination of all yielded a pretty nice gain (see sig.) :chevy
Melting Slicks
Joined: Jan 2002
Posts: 3,159
Likes: 0
Re: Quick Question about GUTTING CATS..... (StealDads67)
if nothing else kev, do it as an act of defiance against the government!
j/k
well you know my 2 cents..
free hp is the greatest thing next to a (crate) stroker
Bout damn time you started moddding that factory freak... and where the hell is your baseline! :mad
[Modified by TreyZ28, 5:18 AM 7/31/2002]
j/k
well you know my 2 cents..
free hp is the greatest thing next to a (crate) stroker
Bout damn time you started moddding that factory freak... and where the hell is your baseline! :mad
[Modified by TreyZ28, 5:18 AM 7/31/2002]
Safety Car
Joined: May 2002
Posts: 4,659
Likes: 82
From: Toronto ontario
Re: Quick Question about GUTTING CATS..... (TreyZ28)
had mine removed on my 93. Put on watson fullength headers at the same time. headers back is the bone stock LT1 exhaust. I recorded 19 rwhp with no cats/headers.... thats with stock exhaust.
Thread Starter
Melting Slicks
Joined: Jan 2002
Posts: 2,784
Likes: 3
From: Atlanta GA
Re: Quick Question about GUTTING CATS..... (5abivt)
Trey... I just had to start modding... I couldnt wait any longer to go to the track... Oh well.... :D Car def seems a little freakish though
Safety Car
Joined: Jun 1999
Posts: 3,641
Likes: 2
From: Southern California
Re: Quick Question about GUTTING CATS..... (5abivt)
had mine removed on my 93. Put on watson fullength headers at the same time. headers back is the bone stock LT1 exhaust. I recorded 19 rwhp with no cats/headers.... thats with stock exhaust.
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Joined: Jun 2002
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From: www.corvetteflorida.com
St. Jude Donor '03-'04-'05-'06-'07
Re: Quick Question about GUTTING CATS..... (StealDads67)
This is probably too late but...had the precats and main on my 87. Noticed a SOTP feel immediately. Also as another said, the sound grew lounder and deeper. Really like the sound and performance. Didn't do a DYNO so have no way to tell the actual HP increase other than SOTP.
Good luck :cheers: :flag
Good luck :cheers: :flag
Safety Car
Joined: May 2002
Posts: 4,659
Likes: 82
From: Toronto ontario
Re: Quick Question about GUTTING CATS..... (STREETKNIGHT)
I got my watson headers from Callaway. Callway makes custom designs and watson builds them for him. they cost me $1400 from him. Ive had them for 5 years, and the ceramic coating still looks new!