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

[atkonkler]

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

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


when any of your guys cats went bad ....how much boost was it building? And what kind of muffler did you go with when the cat clogged your muffler atomic?

 

[Sy644]

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

anybody running without cat? need to program ecm for no cat? iowa has no emission so screw cat?

 

[Black Knight]

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

All four of the SyTy's at the house are muffler-less, straight pipe all the way.

Two of them run cats, two do not, so John yes people run without cats but you don't want to on a stock truck as almost all over boost. All depends on what you want, if you have a relatively stock truck keep the cat it's one less thing to correct for and isn't going to keep you from making power.

 

[Gnocide]

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

i ran no cat on a stock truck- with an atr waste gate &ported turbo hole
solves all over boost issues

 

[atkonkler]

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

I have a 20g ported. ..forge wastegate....aem truboost. ..with stock dp....I don't think I'll have any problems...I'll just set Wastegate duty cycle low and drive it till I get it back up...I'll keep you posted...I'm gutting the cat on Tuesday. ..

 

[berzerker]

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

i ran no cat on a stock truck- with an atr waste gate &ported turbo hole
solves all over boost issues

sorry wrong quote . this is to the question about the stock set up

with a stock chip you will run into issues . a tune is needed to make up for the better flowing leaner running engine . buy turbo tweak or a old atr chip to replace your stcok chip to keep everything safe with a free flowing exhaust .

 

[berzerker]

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

anybody running without cat? need to program ecm for no cat? iowa has no emission so screw cat?

^^^^^

 

[Daithi2]

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

pulled the cat on mine last week, had broke up and was rattling. Catless now.

 

[Black Knight]

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

i ran no cat on a stock truck- with an atr waste gate &ported turbo hole
solves all over boost issues

Is the ATR an external on the crossover?

 

[Gnocide]

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

Is the ATR an external on the crossover?

its an external on an atr 3 inch d/p- i
the wastegate is ported also( not for boost but efficiency)