Yet another exhaust question for everyone. I'm gonna be putting some headers on my rig and dual exhaust (hee, hee, hee). I was talking with my buddy, who drives a gas truck, and he was saying that there are optimal distances to put the mufflers from the headers in gassers to achieve different goals - optimal hp vs torque. Does anybody know anything about this for diesels? I figured that it didn't really matter as long as the mufflers are on the straight stretch between the down pipe and rear axle, basicly not right close to the headers. I figured give the exhaust some time to role then the muffler. What do you guys think? Any thoughts?

 

First off where are you getting headers for a diesel, please post. I have seen hundreds of hardcore pulling tractors with headers but have never been able to find them for truck diesels.


Second, I wouldn't bother with the mufflers, the exhaust will be quieter then a muffled gasser at idle, and wont be that loud going down the road either, mufflers cause backpressure in the exhaust, if you want headers to gain horsepower, you would just be counteracting it buy using mufflers.

But generaly the closer you put them to the back the mellower the exhaust should be as for torque and horsepower I dont really know where to put em.

but if you find headers please post back, i am interested in knowing where to get some.


Diesel rod

 

Mufflers?
What are those for?

Extra weight for traction I guess.

 

The headers can be bought at:

Stan's Headers www.stansheaders.com
Part #269 for a 6.9 or 7.3 non-turbo
$456.50 US.

As for the mufflers, I ran my truck with straight pipes for a while and the neighbors didn't like me, but I might try it again with the headers. It would sound really cool. Different I would think with the headers.

I looked at the Flowmaster website and the only info that they had regarding distances was that the tail pipe portion should be a min 10" and not longer then 6".

Since I live in Canada, I am going to buy the headers in the next couple of days since our $ is not to bad in exchange.

Oh yah, by the way Dave, the canopy and sandbags are for traction assistance Do you know a way I can run stacks and keep a canopy on?

 

There is a truck running around here with the stacks on the outside of the factory bed about a foot behind the cab. Looks real bad to my way of thinking. To far outside the bottom of the bed, real close at the widest point then, way out again at the top of the bed. Where the bottom is sticking way out looks like it would be easy to catch on something like a tree stump.

I have no idea why your neighbors did not like you when it was straight piped. Mine like me when I fire mine up at 2 AM to go plow snow with all the strobes flashing and the pipes singing the turbo song.

There used to be a 50 something Ford panel truck running around here that the guy ran the exhaust up through the inside of the truck behind the front seats. then he mounted a set of stacks horizontal on the top of the back of it with the turnout turned up. They were kinda cool looking, really different looking to be sure. I never did figure out how he got it inspected with the tail pipe inside the passenger compartment though.
You could come up through the bed floor and straight up through the top of the topper.
I do not really like that idea though, a topper kinda limits stuff like that.

 

Topper? what the hell
how old are you?

 

I just ordered the headers yesterday. I think I will try them staight pipe, and if they are too loud, throw some mufflers on them. The stacks were just an idea since my buddy has some I can have, but I like to keep the canopy. Thanks for the imput.

 

On the gassers, the rule of thumb was to stripe the exhaust with shoe polish, and where it quit burning was where you would want to put a balance tube for the best torque. I don't see that as being an issue with the diesels.

 

Dieseldan7.3,
Well, I have been around the block several times.
I clearly remember the Cuban missle crisis and thinking we were going to have nuclear war. Made worse since I lived very close to a Navy base at the time.

And then, "I am a WV Hillbilly and proud of it".
After all it does go on, top'er tha bed.

My thoughts about muffler location, put it way back. The exhaust will be slightly cooler so the exhaust gas volume will be slightly less to go through the restriction of a muffler. There is enough heat coming out the end of my stacks to melt a strobe light housing when I am pulling the big hills around here. Bet I could set shoe polish on fire there also.

 

Thanks for the advice Dave. I will keep that in mind when I get the duals running. I can't wait to hear what they sound like. Like they say, patience is a virtue, it is just a virtue that I have a hard time obtaining sometimes.

 

You could make a double wall pipe going up thru the bed and topper,even 6" stove pipe,as for the hill billy action,i'm a born and raised penciltuckian,holbrook pa,bout twelve or so miles from blacksville WV.i'm still a redneck,more lights,more antanas,more big tires,more straight pipes,mufflers work good takin up room in the trash trailer.