Could a blocked Cat cause boost drop ?
#1
Thread Starter
Three Wheelin'
Could a blocked Cat cause boost drop ?
I am just wondering if a blocked cat could be stopping my car from getting any real boost. Without going into the countless problems and things I have replaced, my car was backfiring really badly prior to current work I have done and am thinking this bad back firing may have caused a blockage/damage to cat ?
Also what size cat is used 2" or 2.5" ? I am looking at a magnaflow 200 cell Hi-flo as a replacement
TIA
Also what size cat is used 2" or 2.5" ? I am looking at a magnaflow 200 cell Hi-flo as a replacement
TIA
#2
Bruce,
I had a problem a while back where I was only seeing 1.2 bar on the stock boost gauge and it my case it turned out to be a clogged cat.
Can't help you in terms of your size question.
I had a problem a while back where I was only seeing 1.2 bar on the stock boost gauge and it my case it turned out to be a clogged cat.
Can't help you in terms of your size question.
#3
Thread Starter
Three Wheelin'
Cheers Fejjj. I originally was thinking backfires could have caused an exhaust leak, as they were quite violent at times, but Cat being damaged also makes sense.
#4
Professional Hoon
Rennlist Member
Rennlist Member
2.5"
do you want a cat? or do you want option B that also came out with the 944 turbo.
I have that section with out a cat, but with a resonator (factory).. The only thing is, that it's modified so it had no wastegate tie in.
do you want a cat? or do you want option B that also came out with the 944 turbo.
I have that section with out a cat, but with a resonator (factory).. The only thing is, that it's modified so it had no wastegate tie in.
#5
Absolutely any exhaust obstruction can cause a reduction in boost. My old Audi with a 1.8T had the cat core blow apart and go fully down the exhaust and block in the rear muffler. So make sure you check the whole exhaust if/when you pull the cat.
#6
Thread Starter
Three Wheelin'
Thanks for the tip as didn't even think of that
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#8
Professional Hoon
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