x-pipes
Thread Starter
Burning Brakes
Joined: Jul 2003
Posts: 873
Likes: 2
From: Whittier ca
x-pipes
Yea, I know this topic has been brought up before. I'm running Flowmasters and stock pre-cats and main cat. and I'm about ready to replace main cat and eliminate precats. The Flowmasters have quite a bit of resonance. After reading some of the posts regarding muffler eliminators, straight pipes, etc., I got the impression that eliminating the pre-cats would probably give me even more resonance. So the questions are, 1)-would adding an x-pipe help resolve some of the resonance? and 2)-where does it go? Before the main cat or after?
Thanks for the input
Subman
Remember the Wave - even if they don't wave back!
Thanks for the input
Subman
Remember the Wave - even if they don't wave back!
Safety Car
Joined: Jul 2001
Posts: 3,833
Likes: 0
From: Orange County California
Re: x-pipes (subman)
I dont think the X-pipe will do much to help the resonance. I just added a crossover pipe on the rear Y-pipes and it didnt help much. I was told that it should help. I am trying sound proofing next. I just took out the carpet tonight and am looking at getting something that will lay under it to help sound proof it. If it dont work, Im getting a new system. :smash: :smash: :smash:
Thread Starter
Burning Brakes
Joined: Jul 2003
Posts: 873
Likes: 2
From: Whittier ca
Re: x-pipes (oldace84)
Yep - I checked with the owner of Gene's Muffler on Downey. As long as the car is warm when tested, it passes fine without the pre-cats. I don't know about the x-pipe though. I am still in questions as to where the x-pipe fits in. It appears the forum is somewhat split as to whether or not it is going to make a difference in resonance.
Thanks for the replys
Subman
Thanks for the replys
Subman
Melting Slicks
Joined: Mar 2003
Posts: 2,472
Likes: 0
From: Toronto ONTARIO
Re: x-pipes (cprgmr)
well i dont want to name names here. But i spoke to a few exhaust manufacturers that make full systems for the lt1/4, including the one that i have. They themselves said it was a waste. They said some people boast about the 8 rwhp gain but forget that they lose the same amount everywhere else in the curve except for near peak. They said it benefits very very high hp cars.
I was curious about the impact of a resonator necking down (did i give it away :lol: ) And they said No, the resonator actually increases velocity and speeds up flow, thats why they did it. They said on my 470 rwhp motor i would gain maybe 5 hp - only at peak. NOT worth the $400 to me, especially because i love the sound the way it is.
:cheers:
I was curious about the impact of a resonator necking down (did i give it away :lol: ) And they said No, the resonator actually increases velocity and speeds up flow, thats why they did it. They said on my 470 rwhp motor i would gain maybe 5 hp - only at peak. NOT worth the $400 to me, especially because i love the sound the way it is.
:cheers:
Melting Slicks
Joined: Sep 2000
Posts: 2,710
Likes: 1
From: Green Bay WI
Re: x-pipes (DieL)
well i dont want to name names here. But i spoke to a few exhaust manufacturers that make full systems for the lt1/4, including the one that i have. They themselves said it was a waste. They said some people boast about the 8 rwhp gain but forget that they lose the same amount everywhere else in the curve except for near peak. They said it benefits very very high hp cars.
I was curious about the impact of a resonator necking down (did i give it away :lol: ) And they said No, the resonator actually increases velocity and speeds up flow, thats why they did it. They said on my 470 rwhp motor i would gain maybe 5 hp - only at peak. NOT worth the $400 to me, especially because i love the sound the way it is.
:cheers:
I was curious about the impact of a resonator necking down (did i give it away :lol: ) And they said No, the resonator actually increases velocity and speeds up flow, thats why they did it. They said on my 470 rwhp motor i would gain maybe 5 hp - only at peak. NOT worth the $400 to me, especially because i love the sound the way it is.
:cheers:
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Le Mans Master
Joined: Apr 2002
Posts: 7,281
Likes: 5
From: Boston
Re: x-pipes (DieL)
well i dont want to name names here. But i spoke to a few exhaust manufacturers that make full systems for the lt1/4, including the one that i have. They themselves said it was a waste. They said some people boast about the 8 rwhp gain but forget that they lose the same amount everywhere else in the curve except for near peak. They said it benefits very very high hp cars.
I was curious about the impact of a resonator necking down (did i give it away :lol: ) And they said No, the resonator actually increases velocity and speeds up flow, thats why they did it. They said on my 470 rwhp motor i would gain maybe 5 hp - only at peak. NOT worth the $400 to me, especially because i love the sound the way it is.
:cheers:
I was curious about the impact of a resonator necking down (did i give it away :lol: ) And they said No, the resonator actually increases velocity and speeds up flow, thats why they did it. They said on my 470 rwhp motor i would gain maybe 5 hp - only at peak. NOT worth the $400 to me, especially because i love the sound the way it is.
:cheers:
Later :cheers:
Melting Slicks
Joined: Sep 2000
Posts: 2,710
Likes: 1
From: Green Bay WI
Re: x-pipes (Darkness)
Well they miss lead you, cause waht you just said is not correct. Any type of cross over pipe, either X or H on a "true dual exhaust system" will help on the low end, the main reason is that the cross over pipe will keep both pipes at a constant pressure and therefore provide more tq due to the exhaust pulses. Now the X pipe will provide a little more topend than an H pipe but the later will give a better lowend. The sound differences are: X pipe will give a higher pitch sound, kind of like the engine is reving higher than what actually is, and H pipe with provide a deeper rumble.
Later :cheers:
Later :cheers:
Drifting
Joined: Jan 2002
Posts: 1,608
Likes: 0
From: I Hate Tourists FL
Re: x-pipes (Strick)
When I orginally took out my cats and resonator I put an x-pipe where the resonator was basicly right between the seats. I had flowmasters at the time and the resonance was unbearable. After several months I removed the flowmasters all together and went with straight pipes and the resonance was still bad. I pulled everything out and put EM longtubes in all new 2.5 pipe with the x-pipe in the same position as before and Magnaflow mufflers designed for the car and the resonance has dropped considerably. You can actually hold a conversation in the car now.
