Hmmm maybe this is why my boost is so low....

AppleTY

AppleTY

Donating Member


I should have checked this earlier. For those of you that still have catalytic convertors, there is an easy way to check if its gone bad. Aside from hitting it with a hammer...

Run the truck up to temp, use an IR thermometer and check the inlet and outlet of the cat. If the outlet isn't about a 100 degrees hotter than the inlet, it's bad.
In my case the inlet was 100 degrees hotter than the outlet.
And for us Californian's, Magnaflow makes a 50 state legal replacement.

I can't wait to get it back together and hit the DM's....
 
atomicmecha

atomicmecha

I hate rust
Re: Hmmm maybe this is why my boost is so low....

be glad it was limited to your cat. my cat broke up and clogged up the muffler. :rotf:
 
Gnocide

Gnocide

turbo game burt reynolds
Re: Hmmm maybe this is why my boost is so low....

man ,haven't seen one of those since the price of platinum was a record high.

is California not bankrupt yet from all the stupid regulations?
give it time.
 
atkonkler

atkonkler

Is this your bush?
Re: Hmmm maybe this is why my boost is so low....

Oh ya man should almost be able to at least half pay for a new converter.
 
Black Knight

Black Knight

I Glow Therefore I am
Re: Hmmm maybe this is why my boost is so low....

AppleTY said:
That reminds me, I probably can get a few bucks for it huh?
Click to expand...

If you find anyone local who'll buy them let me know I've got a couple. Last time I checked no one seems to buy them anymore after the level of theft increased on them.
 
Gnocide

Gnocide

turbo game burt reynolds
Re: Hmmm maybe this is why my boost is so low....

Black Knight said:
If you find anyone local who'll buy them let me know I've got a couple. Last time I checked no one seems to buy them anymore after the level of theft increased on them.
Click to expand...

you just gotta find out what the metal is going for-then sell
like
is gold $1300 an ounce or $1700.
 
JAY

JAY

Donating Member
Re: Hmmm maybe this is why my boost is so low....

I just broke mine out a couple weeks ago. The cat was cooking the floorboard in the truck & was creating a no power issue on the truck.
 
Gnocide

Gnocide

turbo game burt reynolds
Re: Hmmm maybe this is why my boost is so low....

JAY said:
I just broke mine out a couple weeks ago. The cat was cooking the floorboard in the truck & was creating a no power issue on the truck.
Click to expand...

even better idea
hollow it out for that stealthy look to fool all the tree huggers.
 
BoostedSUV

BoostedSUV

Active member
Re: Hmmm maybe this is why my boost is so low....

Chased a boost issue for a few months before pinpointing the clogged cat. At least it's something stupid and easy to fix
 
MRKING

MRKING

New Parts for Old Trucks
Re: Hmmm maybe this is why my boost is so low....

I wonder how many trucks are running poorly because of this situation ? Or halfway to this level of blockage . You should be able to get something for this ,they are definitely worth something . Last year one of my cousins had their's stolen while he was on vacation . Must have been a cordless sawzall or something similar to reach up under the car with as low as it is .
 
atkonkler

atkonkler

Is this your bush?
Re: Hmmm maybe this is why my boost is so low....

The ? Now comes , who makes a good high flow cat that will work with our trucks?
 
D

Damian

Member
Re: Hmmm maybe this is why my boost is so low....

Im running a Magnaflow 3" OBDI cat and it works great, passed smog really easily. Random Technologies has some really nice cats, CA legal too.
 
AppleTY

AppleTY

Donating Member
Re: Hmmm maybe this is why my boost is so low....

Here is a pic of the old vs. new cat. The new one is a Magnaflow Direct Fit - CARB exempt CA Legal cat.



It doesn't quite fit the heat shield though. Might have to make some brackets or something.
 
Black Knight

Black Knight

I Glow Therefore I am
Re: Hmmm maybe this is why my boost is so low....

Gnocide said:
you just gotta find out what the metal is going for-then sell
like
is gold $1300 an ounce or $1700.
Click to expand...

We're only talking about $100 a piece so I'm not super concerned on how much I can get, I just need to find someone period. I called about 5 recycle yards and none will buy CAT's anymore.




Because CA passed a law last year it's a little more difficult to find a CAT that will fit a 3" application. Everything is based off stock replacement now, they don't allow you to search by dimensions, only by vehicle. It took awhile, but I was able to find a full size Chevy van that had factory 3" exhaust and only used a T1 CAT (most newer 3" seem to be T2 setup).

I ended up getting the Mangaflow as well, part number was 45009 in case anyone ever needs it. This is NOT a direct bolt it replacement. I was unable to find a CAT that was the same design as our factory one in a 3" size. This will require some fab to be put in, but if you want a CARB legal CAT that's 3" this was the best one I could find.
 
ajt86

ajt86

Member
Re: Hmmm maybe this is why my boost is so low....

a lot of recycle yards wont take cats- you need to call a "core buyer" the same guy who takes batterys/alternators/racks/ect. We do a ton of fabricated exhaust work in my shop- I usualy replace cats with magnaflow high flow cats.

we sell the old converters to a core buyer- he will take your drivers lisence and everything. platinum has gone down over the past year- a cat the size of a stock syty last year we were getting around 120$, now its bout 75$
 
AppleTY

AppleTY

Donating Member
Re: Hmmm maybe this is why my boost is so low....

Finally, after weeks of checking everything I get the boost I have been waiting for.

Not bad for a completely stock truck that sat for 12 years and has 130k miles on it.



I replaced the catalytic convertor with the magnaflow and also an RPM 3" catback exhaust.
 
You must log in or register to reply here.
Top