High flow cat questions...
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High flow cat questions...
Hi, I recently purchased a High flow cat/downpipe from zz performance. I got it very quickly and had it installed this morning. There is a very noticeable noise that comes from it. It’s a sound that’s very hard to describe but can be heard even when your radio is on full blast. It doesn’t happen when you idle or slowly acelorate, only when you give it some gas pretty hard. It kinda sounds like a rattle but like more then 1 rattle at a time. I talked to the mechanic who installed it for me and he said that may be normal at first and to give it a few days to settle in. I was currious what you guys thought about that? Best way I can describe it is if you put 150 pieces of rice in a metal sealed pot and shook it. I have only driven it hope from the exaust shop, so if this is it just wearing in, how long should I have to wait to see it reduce or go away?
#2
after any exhaust work dont go WOT! after 100 miles of installing a header, down pipe, cat back etc. you should baby the car till 100 miles then have all the bolts re tightened. if u like do it again after another 100 miles. this will make sure that your exhaust stays tights with minimal vibration and zero exhaust leaks. gratz on ur purchase
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OK now that its not raining and we put the windows down we believe it to be an exaust leak now. My brother says he can see the gasket hanging down. Unfortuately I dont have time to fix it until tuesday so I will update once we fix the gasket and retighten everything up.
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Originally Posted by sheek360
Did You Guys Re Tighten?
Does sound louder though which I like minus the annoying noise
#12
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i emailed zoomer he said the noise will go away with a 1500 miles or a month which ever you do first. the sound is no carbon build up in the cat so it is vibrating!
I feel alot faster up top 5-7k but down low it feels the same me and xenozx will have a video of are cars once the 2.8" pulleys come in!!!!!!!!!!!!!!
I feel alot faster up top 5-7k but down low it feels the same me and xenozx will have a video of are cars once the 2.8" pulleys come in!!!!!!!!!!!!!!
#14
Originally Posted by cvenom2122
i emailed zoomer he said the noise will go away with a 1500 miles or a month which ever you do first. the sound is no carbon build up in the cat so it is vibrating!
I feel alot faster up top 5-7k but down low it feels the same me and xenozx will have a video of are cars once the 2.8" pulleys come in!!!!!!!!!!!!!!
I feel alot faster up top 5-7k but down low it feels the same me and xenozx will have a video of are cars once the 2.8" pulleys come in!!!!!!!!!!!!!!
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Originally Posted by sheek360
how far are you torqing it down?
#16
Originally Posted by Xenozx
Till it wouldnt move any more LOL. We did it with just a regular wrench, but that thing wasnt moving any further, and we used washer locks.
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I just got done installing my J/S header and zz perf DP w/out CAT. Anyone else have a high pitch wistle like sound when accelerating? The gaskets were all in good shape and everything was tightened down... so i dont think anything is leaking. Maybe its the DP breakin in or something.
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Originally Posted by 05_Blue_B10WN_SS
I just got done installing my J/S header and zz perf DP w/out CAT. Anyone else have a high pitch wistle like sound when accelerating? The gaskets were all in good shape and everything was tightened down... so i dont think anything is leaking. Maybe its the DP breakin in or something.
#19
Originally Posted by Xenozx
Do you read? yes... I made this post and another that talk about it. Drive for a while and it will start to go away. ZZP says it should go away after 1500 miles of driving. Its cause you need carbon to build up inside the tube, as its sound dampening material.
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Originally Posted by Nuclear
Thats good news!
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