i still have the cats as we cut them off and saved them. i can truthfully say there is no rescrection in them you can see day light very well.

as some one else said. throwing faults. yes it will big .it the fault for bad cat effency. if you want to play and don't want to mess up the stock cats email me i'd be happy to part with the old ones for a fellow v10 owner who wants to try and play.

 

It appears that if a person owns a 3v V10 that they don't have many options to increase torque/hp without major work.
I just traded for an 04 F250 V10 a couple of weeks ago, and immediately ordered a nw Y-pipe off of e-bay, a new intake filter & tubes, again from e-bay, and a Hypertech tuner.
They are all still in the boxes as of now.
If I am understanding correctly, the 3v motor didn't come out until the 05 models, correct? meaning my 04 should be a 2v model??
Should I can this stuff and forget it, or forge ahead. I understand all that about the y-pipe bottlenecks increasing velocity and pulling exhaust pulses, etc. But surely the gain from opening it up would far exceed the benefit bottlenecking the Y-pipe to help scavenging.
The stock muffler seems to be OK, but it might be hindering some hp/torque as well.
I don't want a race truck, and rarelyl even punch it unless someone tries to test me. Just pull about 11,500lb boat and trailer in the summer, maybe a total of 2500 mi.
What to do??

 

v10 man has a good point ans to tell the truth all I ever got out of a "lollipop setup was a lot of grief... I tried a trombone type slide tube once and accepted the smallish leaks... that system was very tunable!

You are about in the same ball park as my earlier calculations back with the 2v V10 I had..and yes a true dual is about the best to keep the off idle to mid band real happy and fast flowing... thermal wrap and I think an "H" or "X" between 36 and 39 inches has proved best for these cam durations and cc volume...I also think 1.75 to 2.25" is the largest primary size I would screw with probably sticking on the under 2: side to keep flow going fast as it is a LONG way to a legal exit point... for true off road only racing use the max length needs to be around 84 to 96 inches

I would really like to see some one spend the labor to fab up a 180 system for a v10 and accept the under side clearance loss.... opened up I bet it would sound pretty mean!....Certainly not good for neighborhood relations

 

yes they do sound nasty fred but no where near as nastie as a good running v8 not even as loud. the sound i feel is still like the detroit diesels in my old 48 foot boat. it's 2 strokish in sound.

ford did a very good job on tuning the 3valve motor and playing with it may just tell some else besides me how much better off leaving that cash in the bank or taking a nice vacation could be.

h2oboy just wait for the newer obd2 or even the new obd3 specs to get out then playing with any part of the emission system will sound bells and whistles to the cars builders and the man as you drive past.
and yes we already have small black boxes in the cars and trucks. it's built into the airbag computer and tells the speed driven , the g force of the hit and another 30 seconds of information just before and into the crash when the bags go off.

just as a example we had a crash near by my home about a month ago that killed the kid, when the cops pulled the crash information out they found the kid was driving his z06 vett at 123 mph just before the crash and the g force of hitting the cement wall was 13 g's.
this is nothing when when obd3 hitts the world as to what the man will know about your driveing habbits or what mods are done to your ride.for now be thank full we have sema on our side fighting for our rights to tinker and individulize our rides

 

I certainly can wait for that!! The gov is into our personal lives enough the way it is. But this doesn't adress my question. Will these mods do me ANY good on my 04 V10? and, is th 04 a 2v or 3v motor?

 

H2O Go for it. The 3V didn't come out until 05. The 2V respond well to exhaust mods.

 

short.........sweet........and right to the point! i second that comment, even after all the controversy related to this issue!

 

yes and i back up jason with his post. the 2 v does respond to mods. that i will back up! just they 3 valve there is not much that ford hasn't pulled allready out of it. they could give it a variable cam timer set up off the 5.4 and a blower. but that seems all for right now.

the intake system flows very well dead stock. it's viriable runner set up is right out of a german tunners set up. same with the exhaust, it looks big and is very heavy. but the flow is not that tight, the stock cast iron manifolds are a shortie header set up and flow the same rates .the cats the same way they flow freely. well the muffler yes it's big, heavy. but dose it's job very well.

while i love working on and running a big and loud motor to race with this. 05 up v10 just dosn't sound that great uncapped, esp. my closest sound pick is right out of a 8v71 or 92 detroit diesel. out of 4 systems i tryed, a custom built useing a flow master 70 worked the best and i most likely would still have it on if not for how much road salt they use around me to melt the winter ice and what it dose to alumized steel. the out right worse one was the m b r p 4 inch one . man did that hurt my ears inside and made impossible to drive with the windows all closed

and again each to their own likes.

 

Would it be worth my time & money to have a set of true duals put on with an H and hi-flow mufflers/pipes, or just stick with the new Y-pipe and stock single exhaust from there back?

 

h20boy Duals will be really loud and crappy sounding. The single 3" is plenty big. If your not doing headers then just the Y and a aftermarket muffler will be better than nothing. If you're thinking headers look into Borla, Banks or Hedman. All 3 offer a replacement Y as part of the kit.

 

The factory exhaust manifolds LOOK pretty good to me. Since I don't need a race truck, and I just want to improve my performance a bit, I had figured that headers probably wouldn't be worth the dollars to me. So, at this point, I'm doing an intake system, new Y-pipe, probably a muffler, and a Hypertech tuner. Whatcha think?

 

H20BOY- CAPTCHAS will have a more exact answer for you on the true dual exhaust for the 3-valvers, i've only seen ONE set up w/out a balance pipe on a 2-valver and it did sound crappy. the 4x4 shop did it up w/ a different Y pipe and 2" pipe...........

BUT i have never seen a "bad" result from a "true" dual exhaust with a balance pipe (H or X), might be different for the V10's though! granted the only systems i have done exhaust work on with that set up have been old model chevy 305/350's, the 5.7L 1500 & 2500 trucks, a couple 7.4L, and a stroked 5.0 ford (347cid) mustang. the H pipe set up "sounds" better IMO, BUT the X pipe set up is better for perfomance. the X style has more of a high pitched rumble. and they are VERY loud, just keep that in mind too!

 

im just gonna have to throw in my 2 cents on the mbrp exhaust system. i have a '99 2valve v10 with the dual exit mbrp system. it sounds amazing, no drone, throttle response is better now. i would agree with everyone on putting it on a 3 valver though, i could see where it would be too loud. in a week or so im going to be buying a set of hedman hedders for my truck as well, i'll get some sound clips before and after.

 

jason
i can only say driving it with just the stock and small cats in place and dumping out of them at the first bend .it sounded awfull same with the pos mbrp dual 4 inch system i had to drive in 30 deg temps with all my windows open just to bear the drone inside the cab, even got me several tickets for being overly loud by the man.
when mbrp was asked for help.nadda nothing or how ever one puts the wording, $746.00 in the round smeelie can. a 3 valve motor never again would i personally try to mod again.