Dual Exhaust Question?

[mmoe]

I have 2001 explorer sport. And im wanting to get dual exhaust put on it. Any suggestions. Im thinking flowmaster or is there something better. How does the V-6 sound.

 

[snocross1985]

Check out the search feature on this site, many people have done exhaust on their trucks here. You can use a muffler with a dual out and run the pipes back from there. True duals are not recomended for a V6 as you will lose too much back pressure. I have a Flowmaster on mine and love it, but those who use other brands like theirs best as well, its all about how loud you like it. But do a search on this site and you should be able to find some sound clips of exhaust on the V6. Oh ya, welcome to the site!

 

[TheRookie]

Agreed with everything but the backpressure loss being bad. What you are losing is Flow. fast flowing gasses creat scavenging. This is what you want. Backpressure in all forms is BAD. Common misconception between the two

 

[joeshmo473]

actually, therookie, you are wrong in your thinking all forms of backpressure is bad. if this were true then pro drag racers would not have headers on their engines. back pressure IS needed. headers also "suck" the exhaust out of the engine due to the other cylinders flow. too little back pressure creates bad idleing and a loss of power, just unbolt your muffler from behind the cat and see. i recently added a summit racing glasspack to my X. i had too little back pressure because the exhaust came out under the car via turndown. well i had to weld on the 2.25 inch tubing to the back to gain some more pressure, now i have more power than before. very low back pressure is only for high output engines like drag racers, dont think a stock explorer needs very little back pressure. i would have kept the origianl setup with the glass pack on my X if i could run it above 5K rpm because it seemed the only power i got was above 4000RPM and last time i checked thats almost where my rev limiter kicked in.

 

[TheRookie]

You make my point for me Joe. The headers create scavenging. This is what people mistake for backpressure. Pro drag racers would defrinately run headers. The scavenging we both speak of is verry benefitial. Also Headers take heat out of the head. After taking countless hours on making custom exhausts I think I have this down. I have even dyno proven the differences in class specificaly because people dont understand how exhaust works

 

[X~FACTOR]

Would it make a difference if you run dual exhaust with only 2" (or even 1.75") exhaust pipe? Wouldn't that build enough back pressure to compensate having the duals?

 

[TheRookie]

Read the previous few posts. Backpressure is BAD. It is possible that would help but not really worth it. I would just use a single in dual out muffler

 

[joeshmo473]

yes backpressure is bad if you want power out of a big block 454 at 4500 rpm. but for everyday explorer use and offroading where low end power is needed some backpressure is needed to gain the maximum amont of power at these opperating ranges. i have read articles on backpressure from major muffler companies and out of racing magazines and they all say that you can have too little backpressure on a low output engine. unknown to many but drag racers do have LOTS of back pressure even though they have high flowing headers. they are cranking out 7000 hp into two 5" headers. this is an ass load of hp and exhaust flow, thats why they shoot flames into the air.

 

[TheRookie]

How do you possibly relate shooting flames to backpressure. They are actualy caused by unburnt gasses coming out of the exhaust. sorry man but if you are going to start a debate know your facts. And once again its flow not backpressure. What training do you have to back up your statements
Edit: some engines are tuned to have some backpressure on them. However if retuned properly you ALWAYS gain when getting rid of it

 

[greenhornet3147]

DING DING DING

Round 1 joeshmo473

 

[joeshmo473]

therookie, how do you propose to lower the backpressure on an explorer without losing flow, i did and i lost lots of flow, the engine had no power from idle to 3500 RPM, is this because it has exhaust manifolds.

 

[IAmTodd]

When I did mine, I lost a little power up to 3k RPMs. But after that it gained quite a bit. Throttle response is amazing though! You wouldn't believe the difference!

 

[TheRookie]

First off green hornet this is in no way a fight. We are having a debate.
Lowering backpressure is an art. Smaller piping with less restriction is how. A totaly straight 2 inch pipe would probably be best. Followed obviously by a mandrell bent 2. Bigger is better when there are more restrictions.

 

[joeshmo473]

the rookie, you said you have made custom exhausts etc. does the shape of the tubing create a different sound, and what about tube thickness. also what do you think about a flowmaster 40 with 2.25 in and dual 2.25s out on a 91 X

 

[IAmTodd]

the rookie, you said you have made custom exhausts etc. does the shape of the tubing create a different sound, and what about tube thickness. also what do you think about a flowmaster 40 with 2.25 in and dual 2.25s out on a 91 X

Its loud, Check out my website under Dual Exhaust for sound clips.

 

[TheRookie]

I make custom exhausts daily. Shape does make a difference but not much of one. I cant speak on wall thickness cause all I use is the same. A 40 with 2.25 in and dual 2.25 out would be pretty sweet as long as its done well. Mandrell bends are worth it if you can find someone near by that can do them

 

[osker75]

i have flowmasters 40 series on my 01 explorer sport and its not the great v8 rumble sound but its not that bad once in breaks in you can take a look at some of my pics to see how i ran my pipes in my profile

 

[joeshmo473]

iamtodd, did you buy those pipes as is or did you have them custom made at a local shop. the rookie, my glass pack sounds different than when it was just dumped under the car, more backpressure and i also think its because the pipe shape, its not mandrel bent. how much of a difference in cost would mandrel bending cost