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Exhaust 5.2L Wxhaust Discussion


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  #1  
Old 01-28-2009, 03:41 PM
paintballproam
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Default Exhaust help!

1999 Dodge Ram 1500 5.2l 4x4 automatic

So i found out today, when getting my truck inspected, that the "cat back" exhaust the previous owner put on consisted of straight pipes after the cat and then two sets of dual tips that have like make shift baffling on the inside edges but they are still straight through. They arnt legal, but they're giving me a sticker anyway.

I want to do an exhaust, but to my way of thinking, why bother doing a cat back when an exhaust system can only flow as much as the most restrictive part? Why not do everything from the headers to the tips? and why not run true dual?

So im thinking id like to do everything from headers to tips, i want cats/a cat, and mufflers/a muffler so that im legal. The guy said if it had a cat, and muffler, and didnt throw a check engine light im fine. So i was kind of thinking two headers, two cats, two mufflers, and two tips. complete dual exhaust. Am i wrong with that idea? what would you suggest i do? Also what size should i go with

Im open to any and all suggestions!!!
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  #2  
Old 01-28-2009, 04:27 PM
erm
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First things first...check your local regulations. In my state, if the truck was not originally equipped with dual exhaust by the OEM, you cannot install dual exhaust.

Having said that, if your local regs allow such a modification, you are on the right track...start at the exhaust end and go headers, high flow catalytic converters, crossover or "X" pipe, two mufflers of your choice, tailpipes and tips.

To avoid losing low end torque, I would not stray much farther than .25" above stock exhaust diameter. So, if you are at 2.5" now, don't go any larger than 2.75".

Your favorite exhaust shop can tell you, by measuring the pipe at the inlet or outlet of the existing cat, what the stock size is. Some shops will want to put on a 3" catback exhaust and that's fine, as long at the cat inlet or outlet is no larger than .25" of stock.
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Old 01-28-2009, 07:11 PM
paintballproam
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Ok well i was planning on checking my local exhaust shop first, i didnt know if there were any premade systems tho
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Old 01-28-2009, 11:05 PM
erm
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There might be but I couldn't find one for mine...and remember, we got the same truck! LOL
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  #5  
Old 01-28-2009, 11:14 PM
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Quote:
Originally Posted by MADDOG View Post
start at the exhaust end and go headers, high flow catalytic converters, crossover or "X" pipe, two mufflers of your choice, tailpipes and tips.

To avoid losing low end torque, I would not stray much farther than .25" above stock exhaust diameter. So, if you are at 2.5" now, don't go any larger than 2.75".

Your favorite exhaust shop can tell you, by measuring the pipe at the inlet or outlet of the existing cat, what the stock size is. Some shops will want to put on a 3" catback exhaust and that's fine, as long at the cat inlet or outlet is no larger than .25" of stock.
This guy knows his stuff!

i got nothin else cause MADDOG got it all

the X pipe is KEY to performance
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  #6  
Old 01-28-2009, 11:38 PM
paintballproam
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Just out of curiosity, why is the Xpipe so important? (im used to turbo 4cyl)
oh any input on which muffler/mufflers? Ive always thought flowmaster for V8s, but which flowmaster?

Last edited by paintballproam; 01-28-2009 at 11:45 PM.
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Old 01-29-2009, 12:01 AM
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Quote:
Originally Posted by paintballproam View Post
Just out of curiosity, why is the Xpipe so important? (im used to turbo 4cyl)
oh any input on which muffler/mufflers? Ive always thought flowmaster for V8s, but which flowmaster?
the X pipe equalizes the pressure in the exhaust = better performance

and I have 40's on my truck ....Ill get a clip of it one of these days....

if you like hard core....i have super 44's on the SRT8 ....this is a rev to only like 2k ....ill get some cooler clips once the Vortech is on and all tuned up

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Old 01-29-2009, 10:19 AM
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Anddddd super 44's are what i want.lol
Are there any specific headers that are better than the others, without being twice the cost? also, would highflow magnaflow cats send a check engine light?
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  #9  
Old 01-29-2009, 10:21 AM
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Quote:
Originally Posted by paintballproam View Post
Anddddd super 44's are what i want.lol
Are there any specific headers that are better than the others, without being twice the cost? also, would highflow magnaflow cats send a check engine light?
I am a fan of Kooks....but thats just me....

and its possible...it did in the SRT8 cause I have MF cats....but it hasn't been back since i cleared the codes

*i did a search and it looks like you can get ceramic coated hedman hedders for a pretty good price
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Last edited by StevoSRT; 01-29-2009 at 11:04 AM.
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  #10  
Old 01-29-2009, 11:54 AM
erm
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Thanks for the kind comments, StevO! You are correct. The "X" or crossover pipe helps to scavenge exhaust efficiently and equalizes the exhaust pulses. It also helps in maintaining low end torque.

Hot exhaust gas, as it cools in the pipe, wants to "crossover" as the length of the pulse increases. Finding the right spot for the crossover pipe is important.

One fool proof way to do that is after you have the duals on without the crossover, paint the inside of the pipe behind the cat with some paint back towards the mufflers. I'd say 12 to 18 inches should be enough. Run the truck for a while around town, do a few WOT blasts just for giggles and grinz, then get back under the truck to see where the paint has burned off...where it ends is a good place for the crossover as the gas has cooled to the point where it wants to crossover.

Hedman, JBA, SLP and Doug Thorley are all firms you should google up and search for applications.

I've used SLP, JBA and Thorley headers before. They have really good quality stuff.

With any header, get a set of Stage 8 fasteners. Once they are in and torqued to the correct spec, when you add the clips, they never back out! Also, get a good set of gaskets. Summit used to carry a line from Russell Pressure Master Seals which were outstanding gaskets. Combine a good set of gaskets with the fasteners and you won't have to worry about leaks.

Interestingly enough, JBA is a California company so all their products carry a California Air Resources Board (CARB) emissions compliance certificate. Since CARB requirements are so stringent, most states recognize this certificate and grant reciprocity...meaning if it has this certificate, it meets or exceeds their emissions requirements and they won't consider your headers or other mods to be in violation of the emissions rulez in your area.
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