Low boost at high rpms

WWDiesel · **Posted:** Tue Jan 26, 2021 4:52 pm

thesameguy wrote:

If the cat is still good, you might see if you can sell it. Used cats can be worth quite a bit of money. I parted out a Jaguar XJ8 a few years ago and got more money for the two cats from a recycler than I paid for the whole car.

True! They do think highly of those pieces of crap.... :ROTFL:

thesameguy · **Joined:** Sat Oct 01, 2016 8:24 pm **Posts:** 652

I bought the Jag for $600 and sold the cats for almost $800.

Chuci · **Posted:** Tue Jan 26, 2021 10:16 pm

WWDiesel wrote:

Chuci wrote:

WWDiesel wrote:

Best to get rid of the CAT and the choke point right in front of it if you can.
Replace all of it with a piece of 2.5" exhaust pipe and never look back.
Your engine and turbo will thank you for it! :BANANA:

As for short term do you think I can just hollow out the catalytic converter?

Absolutely! Have busted out the guts of many a CAT over the years and put them back on. :lol:

Question. I was under my car and I noticed there is no easy way to remove the CAT. Am I just gonna have to poke at it with a screw driver and a long spoon or is there another way?

WWDiesel · **Posted:** Wed Jan 27, 2021 3:29 am

Chuci wrote:

Question. I was under my car and I noticed there is no easy way to remove the CAT. Am I just gonna have to poke at it with a screw driver and a long spoon or is there another way?

Your are right, there is no easy way. That is why most simply remove the CAT and replace the section with a piece of straight exhaust pipe.
Get rid of the choke point and the cat, both which are restrictions, install a 2 1/2 piece of exhaust pipe in place of CAT then install a 2 1/2 inlet / outlet Flowmaster or Magnaflow muffler. This will improve turbo spool up time giving you a little more power and better fuel mileage if you can keep your foot out of it. Sounds great as well... :wink:

Any restriction removed from behind the turbo lowers system backpressure and will help lower EGT's coming into the turbo when under load...

Chuci · **Posted:** Wed Jan 27, 2021 4:26 am

WWDiesel wrote:

Chuci wrote:

Question. I was under my car and I noticed there is no easy way to remove the CAT. Am I just gonna have to poke at it with a screw driver and a long spoon or is there another way?

Your are right, there is no easy way. That is why most simply remove the CAT and replace the section with a piece of straight exhaust pipe.
Get rid of the choke point and the cat, both which are restrictions, install a 2 1/2 piece of exhaust pipe in place of CAT then install a 2 1/2 inlet / outlet Flowmaster or Magnaflow muffler. This will improve turbo spool up time giving you a little more power and better fuel mileage if you can keep your foot out of it. Sounds great as well... :wink:

Any restriction removed from behind the turbo lowers system backpressure and will help lower EGT's coming into the turbo when under load...

Dang that sucks. I’ve gotten some of it out but is there stuff I should watch out for or just take out everything?

Chuci · **Posted:** Wed Jan 27, 2021 2:20 pm

Will it be a noticeable as soon as I start driving it will it take some time?

thesameguy · **Joined:** Sat Oct 01, 2016 8:24 pm **Posts:** 652

If it wasn't melted or severely contaminated in the first place, you won't notice anything. If it was - especially melted - it could be a substantial improvement.

Chuci · **Posted:** Wed Jan 27, 2021 11:30 pm

It did not fix the problem but it will help in the future I will be checking the hoses tomorrow. What hoses do I check?

Low boost at high rpms

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