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Wouldn't the dent/restriction cause more heat ahead of the restriction and less heat after?
Senior Member
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Seems that way to me.Originally Posted by djb383
Wouldn't the dent/restriction cause more heat ahead of the restriction and less heat after?
CF Veteran
Quote:
That's what seems logical to me but I'm by no means an expert on this stuffOriginally Posted by djb383
Wouldn't the dent/restriction cause more heat ahead of the restriction and less heat after?
Seasoned Member
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Just so people ask ? about it.
I think you are right! 3 pages in 2 days, Curious to see how long this debate runs.Originally Posted by 413maxwedge
Just so people ask ? about it.
Gotta wonder if (short of the enginer that made the design) we will ever no for sure or just speculate.
CF Veteran
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i think i'll just stick with my "...stick/log/branch shoved up in there.'' theory... im in mo way an expert on exhaust systems and the reasoning behind the way they are designed, so you could tell me that its there to deadened the sound and i'd believe you. Maybe thats why?.?.?.
i think i'll just stick with my "...stick/log/branch shoved up in there.'' theory... im in mo way an expert on exhaust systems and the reasoning behind the way they are designed, so you could tell me that its there to deadened the sound and i'd believe you. Maybe thats why?.?.?.
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cruiser54
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May 16, 2024
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Well, I've done this on 3 Renix Jeeps and a 99 XJ. Performance increase and throttle response were noticeable. As to getting into all that theory stuff, it only stands to reason that if you restrict the heat before the dent, it's gonna be hotter after the dent than it would be if you had no dent.
CF Veteran
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I'm thinking the dent is there to help the converter heat up faster from a cold start. Therefore, by the time you had your emissions test, the cat would be plenty warmed up already.
Entirely possible - see previous comment on exhaust ports in the 0331 head.Originally Posted by cruiser54
Here's my .02 FWIW. Jon, correct me if I'm wrong.I'm thinking the dent is there to help the converter heat up faster from a cold start. Therefore, by the time you had your emissions test, the cat would be plenty warmed up already.
Methinks the jury is still out. Either way, my opinions and thoughts on emissions control are well known - there are better ways to solve the problem, with less equipment, that is more reliable, without harming performance to do so (improved fuel efficiency generally = improved fuel economy. Improved combustion efficiency = improved fuel economy.)
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Methinks the jury is still out. Either way, my opinions and thoughts on emissions control are well known - there are better ways to solve the problem, with less equipment, that is more reliable, without harming performance to do so (improved fuel efficiency generally = improved fuel economy. Improved combustion efficiency = improved fuel economy.)
^ Originally Posted by 5-90
Entirely possible - see previous comment on exhaust ports in the 0331 head.Methinks the jury is still out. Either way, my opinions and thoughts on emissions control are well known - there are better ways to solve the problem, with less equipment, that is more reliable, without harming performance to do so (improved fuel efficiency generally = improved fuel economy. Improved combustion efficiency = improved fuel economy.)
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