Re: Fake cat (meow :) )

["Mr. Eddy" <eperson@students.uiuc.edu>]

At 02:13 PM 2/14/00 -0800, Randy B wrote:
>
>Eric,
>That sounds like a good idea, but a couple questions.

well at least it seemed like a good idea at the time;)

>
>1. If you use a high flow cat. and 2" exhaust instead of the
>stock one and the 1 5/8"? stock exhaust you gain a few hp
>from less restriction right?

yep, right

>2. How much extra hp are you gaining with the straight pipe
>idea over the 2" high flow cat with 2" exhaust?

none but thats not the point.  He said he wanted to pass the VISUAL test
and a straight pipe cat would *probably* do this.  It should also not
affect power much, if at all over no cat.  It is also cheaper that 200 or
so for a high flo cat.  
I dont think he was looking for more performance but at the same time i
dont think you would want worse performance either.

>3. Will it pass the sniffer test without a cat.
>
>I have considered this in the past but I always feared
>not passing the sniffer so I got a high flow 2" cat.

No idea, havent ever had to worry about it (gotta love Iowa for that).
I've got nothing but a super turbo and 2 1/4".  I would guess that he
should have no problems passing given a good running engine.  IMO, cats are
shit and do next to nothing anyway.  
   I also remembered after i posted that you arent *supposed* to be able to
buy used ones in a yard, but if you knew anyone that worked at one im sure
they would let you throw a couple in your trunk if you were buying some
other stuff.  Or if someone had one sitting around in their garage you
could get one that way.  
 
hope i answered your ?'s, dont think for a second that I'm experienced in
actually doing this:)  I've never made a fake cat before, nor do i need to;
but im pretty sure it would work.  
just throwin out ideas to see if i can help out.   

later,
Eric

>Thanks,
>
>Randy B.
>Cosmos 81 Scirocco S - soon to be 2.0L 16V
>Mars 81 Scirocco S - t t 1847cc
>
>
>
>
>>go find any old cat in a junkyard that is a little bigger than your pipe(ie
>>2 1/4" if you have 2") and not rusted out, hollow it out so you can see
>>through it and put a piece of pipe inside it thats the same size as your
>>exhaust.  Weld the sucker up and youve got an instant straight pipe "cat"
>>for not much cash.  Shouldnt restrict flow any either if you use the same
>>size pipe.
>>
>>Eric Person
>>86.5 16v (w/no cat)
>>
>>At 02:16 PM 2/14/00 -0800, M. Hansen wrote:
>>>Hi All:
>>>Just installed a tt downpipe and exhaust I got for $50 off of a wrecked
>>>GTI.  Sure wakes up the old beast and it finally sounds as healthy as
>>>the rest of the cars in my garage.  Really like that raspy sound above
>>>4000 too.  My problem is that I am facing emission testing for the first
>>>time in 6 months and they do a visual inspection for a cat converter.  I
>>>really don't want to ditch the downpipe for a tt cat downpipe so I was
>>>thinking of installing a cat right behind the downpipe after the shift
>>>box.  Physically there is enough room and this would let me pass the
>>>visual test.  I'm not so concerned about the effectiveness of the cat so
>>>far back from the engine.  My friend with an 84 Rabbit installed a built
>>>2.0L 8-valve last year and passed emissions with flying colours not soon
>>>after.  this was with g-grind, 10:1 comp, and porting.  So I figure that
>>>my 'roc should pass easily as well.  What are your experiences with this
>>>and do you have any suggestions?  Any help is appreciated.
>>>
>>>Mike Hansen
>>>83 Scirocco GT
>>>
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>>>
>>
>>
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