Quick Question about exhaust
Thread Starter
Teching In
Joined: Jan 2003
Posts: 2
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From: Ohio
Quick Question about exhaust I decided to have my muffler cut off and replaced with a custom y-pipe attached to the tips. I was just curious if this would hurt or help the car? It sounds great but I have heard people talk about an engine needing a certain amount of backpressure, not enough and you lose performance, too much (restrictive) and you lose performance. One thing I did notice is that when engine braking sounds good, thoaty, gurgling noise but when I start to get back on the gas it pops a couple times. So in your opinions, do you think I lost or gained performance. I have done, the FRA, and EGR mods and also had my MAF and TB ported. I will be getting a lid shortly. This is of course temporary until I get LT's with cutouts anyways, I like how it sounds was it worth it?
Thread Starter
Teching In
Joined: Jan 2003
Posts: 2
Likes: 0
From: Ohio
Re: Quick Question about exhaust Thank-you very much for the info, you guys are very helpful. One more question... Is the stock Y-pipe real restrictive? It looks like it would be compared to an aftermarket one? How much gain would I get from an aftermarket Y?
Re: Quick Question about exhaust Aftermarket y-pipes are a waste of time. They also have less ground clearence. GM put thoes flat spots in there for a reason and thats for clearence reasons. You wont really get any more flow either, even though its flat spots in the factory Y in thoes same flat spots its wider so flow wont be effected.
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Re: Quick Question about exhaust Less back preasure is a good thing, some people might think they loose power, but the truth is they gained more on top at the expense of a little bottom.
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TECH Enthusiast
Joined: Feb 2002
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From: HTownRacing.com, TX
Re: Quick Question about exhaust </font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by stang killer:
<strong> Aftermarket y-pipes are a waste of time. They also have less ground clearence. GM put thoes flat spots in there for a reason and thats for clearence reasons. You wont really get any more flow either, even though its flat spots in the factory Y in thoes same flat spots its wider so flow wont be effected. </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">they do have lower clearance, but on the flip side to that is that they do provide for a more freely flowing exhaust. take the stock diameter of 2.5" in most areas and the then 1.75" in the flat areas, and hold that up next to a full 3" y-pipe. the difference is obvious but all depends on if you want to go out and get a custom y-pipe made for your manifolds. as Stang killer said this could be a waste of time and money unless doing headers at the same time.
i know from running an ungodly large y-pipe off the QTPs and being on a pro-kit to avoid noticeable areas of which scrapping is inevitable. <img border="0" title="" alt="[Wink]" src="gr_images/icons/wink.gif" />
<strong> Aftermarket y-pipes are a waste of time. They also have less ground clearence. GM put thoes flat spots in there for a reason and thats for clearence reasons. You wont really get any more flow either, even though its flat spots in the factory Y in thoes same flat spots its wider so flow wont be effected. </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">they do have lower clearance, but on the flip side to that is that they do provide for a more freely flowing exhaust. take the stock diameter of 2.5" in most areas and the then 1.75" in the flat areas, and hold that up next to a full 3" y-pipe. the difference is obvious but all depends on if you want to go out and get a custom y-pipe made for your manifolds. as Stang killer said this could be a waste of time and money unless doing headers at the same time.
i know from running an ungodly large y-pipe off the QTPs and being on a pro-kit to avoid noticeable areas of which scrapping is inevitable. <img border="0" title="" alt="[Wink]" src="gr_images/icons/wink.gif" />