What would you all do to delete the cat on a 951?
08-12-2012, 03:22 PM
#16
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08-12-2012, 03:40 PM
#18
Late Porkchops
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I dont want to be the southern neighbor voice of bad news or anything
, but I propose that you reconsider taking the cat out. It has nothing to do with all the offroading you might do 
, greening, or inspections.
The Porsche 951 is one, or could be one, of the few cars ever built that probably runs "better", in most configurations anyway, with the cat in place. If you crank 400Hp into it then you might need a delete, or put on complete race set ups etc, but in street trim they are more finicky with out the cat in place IMO.
There are some new and better cats around too. There are a number of cars that deleted the cats and were later trying to put it back in.
Go over it with your indie there and see what his experience is. I am betting he says that the performance is no better, but the tuning hassles can be larger.
Just my 0.02.
, but I propose that you reconsider taking the cat out. It has nothing to do with all the offroading you might do , greening, or inspections. The Porsche 951 is one, or could be one, of the few cars ever built that probably runs "better", in most configurations anyway, with the cat in place. If you crank 400Hp into it then you might need a delete, or put on complete race set ups etc, but in street trim they are more finicky with out the cat in place IMO.
There are some new and better cats around too. There are a number of cars that deleted the cats and were later trying to put it back in.
Go over it with your indie there and see what his experience is. I am betting he says that the performance is no better, but the tuning hassles can be larger.
Just my 0.02.
08-12-2012, 03:54 PM
#19
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Um, no. This is incorrect. You just need to unbolt it and ram something though the inlet to break up the catalyst. This can be quite difficult since the ceramic honeycomb on newer cat's can be quite resilient. I find a metal fence post or picket works well. Trying to gut one from a hole cut in the side of it would be frustrating. If its a welded in cat you are better off cutting it off, gutting it as described above and welding it back in.
08-12-2012, 08:57 PM
#21
Burning Brakes
http://www.pelicanparts.com/cgi-bin/...0%281986-88%29
This is what I'm going to do..that way I can keep the Cat in tact..you know, in case the lawman gives me any trouble.
This is what I'm going to do..that way I can keep the Cat in tact..you know, in case the lawman gives me any trouble.
That's what I'm looking for, and have the same thought. I had a test pipe on an old Passat that worked great- I do intend to hang onto the cat just in case (it's still good, but cars older than 25 years in Texas no longer go through emissions tests).
Is the OE cat welded on there or can I unbolt the thing and DIY with a wrench? I haven't jacked it up to take a look at this specifically.
Is the OE cat welded on there or can I unbolt the thing and DIY with a wrench? I haven't jacked it up to take a look at this specifically.
Just to be sure we’re on the same page Chris, this is what BlackOp linked for you… Bursch Test Pipe.
It replaces the entire pipe from Turbo down pipe to muffler section.
08-12-2012, 09:57 PM
#22
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I dont want to be the southern neighbor voice of bad news or anything, but I propose that you reconsider taking the cat out. It has nothing to do with all the offroading you might do , greening, or inspections.
The Porsche 951 is one, or could be one, of the few cars ever built that probably runs "better", in most configurations anyway, with the cat in place. If you crank 400Hp into it then you might need a delete, or put on complete race set ups etc, but in street trim they are more finicky with out the cat in place IMO.
There are some new and better cats around too. There are a number of cars that deleted the cats and were later trying to put it back in.
Go over it with your indie there and see what his experience is. I am betting he says that the performance is no better, but the tuning hassles can be larger.
Just my 0.02.
, but I propose that you reconsider taking the cat out. It has nothing to do with all the offroading you might do , greening, or inspections. The Porsche 951 is one, or could be one, of the few cars ever built that probably runs "better", in most configurations anyway, with the cat in place. If you crank 400Hp into it then you might need a delete, or put on complete race set ups etc, but in street trim they are more finicky with out the cat in place IMO.
There are some new and better cats around too. There are a number of cars that deleted the cats and were later trying to put it back in.
Go over it with your indie there and see what his experience is. I am betting he says that the performance is no better, but the tuning hassles can be larger.
Just my 0.02.
Just to be sure we’re on the same page Chris, this is what BlackOp linked for you… Bursch Test Pipe.
It replaces the entire pipe from Turbo down pipe to muffler section.
It replaces the entire pipe from Turbo down pipe to muffler section.
08-12-2012, 11:07 PM
#24
Just to be sure we’re on the same page Chris, this is what BlackOp linked for you… Bursch Test Pipe.
It replaces the entire pipe from Turbo down pipe to muffler section.
It replaces the entire pipe from Turbo down pipe to muffler section.
08-13-2012, 12:07 AM
#25
Burning Brakes
You got it right, Pelican simply didn’t have a photo and I wanted to be sure Chris knew he would not have to cut out the cat and weld in a section of pipe.
Also if you buy the Bursch pipe, have it ceramic coated. The production finish will quickly degrade allowing rust to take over, especially in my region.
Also if you buy the Bursch pipe, have it ceramic coated. The production finish will quickly degrade allowing rust to take over, especially in my region.
08-20-2012, 11:25 PM
#26
WRONGLY ACCUSED!
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If I take a cutting wheel and cut out the cat can I just slip on a 2.5 inch pipe and clamp it? Do the ends need to be flared out to slip over the existing pipes?
Any truth that removing the cat can cause tuning problems? I'm thinking that if I have a 25 year old cat (even ten years old) then it isn't doing anything.
Any truth that removing the cat can cause tuning problems? I'm thinking that if I have a 25 year old cat (even ten years old) then it isn't doing anything.
08-21-2012, 10:54 AM
#27
If I take a cutting wheel and cut out the cat can I just slip on a 2.5 inch pipe and clamp it? Do the ends need to be flared out to slip over the existing pipes?
Any truth that removing the cat can cause tuning problems? I'm thinking that if I have a 25 year old cat (even ten years old) then it isn't doing anything.
Any truth that removing the cat can cause tuning problems? I'm thinking that if I have a 25 year old cat (even ten years old) then it isn't doing anything.
Once I had a proper fitment for the cat, I was able to focus on the 2.5 pipe. Its better to cut the pipe longer then trim it away until the fit is tight. Remember measure twice cut once and make sure you have enough pipe for a tight fit. You also dont want to cut it too short so there is a large gap where fumes can escape.
I then wrapped both seams using 2" exhaust repair tape (make sure you overlap when wrapping), then placed a band clamp on top of the seam/tape. No exhaust leak or fumes..
http://www.summitracing.com/parts/SUM-692250/
08-21-2012, 11:55 PM
#28
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What I did was....cut out the cat and had the piece going to the muffler flared a bit. I made sure my first measurement priority was the universal high flow cat. The cats come in numerous lengths so try to find one close to the 951 dimensions.
Once I had a proper fitment for the cat, I was able to focus on the 2.5 pipe. Its better to cut the pipe longer then trim it away until the fit is tight. Remember measure twice cut once and make sure you have enough pipe for a tight fit. You also dont want to cut it too short so there is a large gap where fumes can escape.
I then wrapped both seams using 2" exhaust repair tape (make sure you overlap when wrapping), then placed a band clamp on top of the seam/tape. No exhaust leak or fumes..
http://www.summitracing.com/parts/SUM-692250/
Once I had a proper fitment for the cat, I was able to focus on the 2.5 pipe. Its better to cut the pipe longer then trim it away until the fit is tight. Remember measure twice cut once and make sure you have enough pipe for a tight fit. You also dont want to cut it too short so there is a large gap where fumes can escape.
I then wrapped both seams using 2" exhaust repair tape (make sure you overlap when wrapping), then placed a band clamp on top of the seam/tape. No exhaust leak or fumes..
http://www.summitracing.com/parts/SUM-692250/
Has anyone tried to get this done with the exhaust still attached to the car? I'm thinking you have to take the exhaust down to get it done.
