DagBMX

the joys of business and manufacturing: how much cheaper can it be made before we slap a giant price tag on it.

betard_foosier

Oh god......

ncxj2000

You were asking about pricing. I have a '00 XJ 2-door, and i took it to an exhaust shop here in NC and asked about dual exhaust. The guy said that its a nightmare and that its not generally worth the trouble. He quoted me $225 for a cat-back Flowmaster 40 series set up with one tip. I got the one exit system and the tone is great!! Granted I also have an AEM intake, but the exhaust note is nice and deep! Hope that was some help

superj

The problem with this line of thinking is it would not have been cheaper to go to duals because they already had a one piece header. In order to come up with a dual set up, they had to pay someone to design and test the set up. I think chrysler got tired of fixing cracked manifolds and found the new deign to be cost effective since it saved them rom having to replace manifolds

DagBMX

true, that could be a case. we have to remember that no matter what, business is business, and allocating resources to get the highest profit is the goal. so, because they got tired of wasting money on replacements? highly probable. cheaper to manufacturing process? also, highly probably. maybe the new process may have been cheaper to manufacture, while cutting down on the number of replacements that have to be made? chalk up the probability of that as well. only way to know for sure is to talk to the guys at Chrysler and get the numbers from them. should make a field trip out of it for me, since i go to school just by their world headquarters, lol.

aj6

i got some to ^

they dont put dual exhaust on jeeps cuz its to much for the I6

single exhaust will give you better torue in all the rpms..

jeep I6 = stump puller

bmw I6 = high rev car..

jeeps got a MEAN first gear blow anyone off the line..


if you want a high rev car.. buy something elst...

captainofiron

how would it not be cheaper to have a dual manifold setup, its 2 less welds to perform and inspect and qualify

Im sure they analyzed the design and came to the single collector design, corect me if I am wrong, but I think some of the older AMC 4.2s had a dual tri Y set up on their exhaust

red97cherokeewithsunroof

Well put brother. I cannot go 0-60 w/o smoking the tires. I think its the overdrive kicking at first tho :P

red97cherokeewithsunroof

And yeah for the original questions of this thread, you should do it! but split after the muffler--it looks BA and it saves so much money.

red97cherokeewithsunroof

Yeah the 96 and 97 are the same...this is all i could come up with tho
http://en.wikipedia.org/wiki/Jeep_Ch...(XJ)#Engines_2

Metlic53

i'm going to see what the exhaust shop says and if its going to be hectic getting it to work over there then i will just run one pipe. we will see.

superj

it will be easier to run one and less trouble.

Metlic53

You are right but i still want to see what they are going to say. Another question. Why do people dump the exhaust right before the axle? does that do anything? i figured sitting in traffic the exhaust fumes would start to come in the cab but you would have to sitting in traffic for a long time. I like seeing my exhaust pipe while others just dump it. Is there a reason they do this?

DagBMX

well, when you add more bends to the exhaust pipe, you are changing the flow of the gases. but, when you do this, sometimes turbulence can build up in the pipe, thus restricting the flow. some guys do this because it gets rid of any extra bends after the muffler, so (theoretically) it results in a better usage of power. but, at the same time, that only really benefits motors pumping out high horses. our I4's and I6's don't pump out that much, so the extra bends in a tailpipe are not going to hinders us any.

or, for some, because just throwing one angled piece of pipe less than 1.5ft. long is much cheaper than running and connecting about 5-7ft. plus clamps. really depends on which scenario.

captainofiron

google equivalent length in piping systems

its not about turbulence, there will be turbulent flow of gases inside an exhaust system almost 100%

otherwise you hit the nail on the head, lets say I run a straight 3" pipe for 10 feet, and you have a 3" pipe that overall is 7.5 feet but you have 1 90degree bend, the equivalent length of the 7.5 run will be effectively longer because 7.5ft + 3"*40 (if I remember correctly its 40)
17.5 ft