Took my truck to the exahust shop last Friday to delete the Ford pretzel pipe. Guy cut the pretzel off 8 inches below the O2 sensors. Ran two 2.5 inch pipes back where the cat use to be, yes cat is now laying in the bed of the truck. Fabricated a really nice looking Y that tapers down to one 3 inch pipe going into the Flowmaster 70 series muffler. Acceleration is un-believeable this thing winds to 4K right now !!! Sounds wicked as hell when you really get on it. Now here is the problem, low end torque shifted up above 3K RPM's. This is what I didn't want since I tow a lot. AND when you accelerate normally it sounds like a V-6 on steroids I know the problem is it's too free flowing, not enough back pressure. Called the exhaust shop and discussed the problem with the guy who did the work, he wants to install another muffler. I want to put the cat back in. So what would you do: 1) Leave it as is- I'll go crazy from the noise in one week. 2) Put the cat back in-Guy at exhaust shop does not want to do this, but I'm the customer. 3)Try another muffler-which one? 4)Since I have dual 2.5 inch pipes halfway back now go ahead and run duals all the way back. (System like V10SKLZZ71's) Which muffers now-Wife will throw me out of the house for spending the money, and will have to sleep with the dog for several weeks. Seriously, anyone have a opinion on this.

Thanks GAV10

 

Try putting the stock muffler back on to start.

-Jim

 

HiTech,

I don't have the stock muffler. I've been running the Flowmaster 70 series for about a month. Seemed to have picked up some low end torque with it.

Thanks .......

Mark

 

Hey Mark,

Sorry to hear that the torque is gone! Well, not gone, just up a bit in the RPM band... Anyway, I didn't experience what you are describing with the addition of my Banks headers and Y-pipe. I had a Gibson cat-back (similar to the Flowmaster 70, I think...) for about two years when I added the Banks stuff and was (and still am) very pleased. The only real difference between us now is the cat (I have mine still on the truck) and the headers. I would think that if you went with headers you would lose even more torque or shift it even higher...

Reinstalling the cat might give you some back pressure. I have heard some folks here say that the cat is not too restrictive. I have heard others say that it made a huge difference when removed. You might want to try reinstalling it and see if the torque moves down the curve.


Best regards,

Jeff

 

Hey GAV DUDE,
Congrats,you already know my recomendation,heh,heh,
seriously though, i didnt lose ant low rpm torque.Not sure if microtuner helps me down low,but i would think it does. Dual it
out, but install some quiet mufflers.Mine has a loud drone @ 2000 rpms and below, but sounds very nice when accelarating. The only time i notice it is loud is when my wife is with me.But to me duals was the best power-adder yet. I pulled my big boat yesterday and noticed a nice torque increase and the exhaust while towing is very throaty-nice!Also i wouldnt think your exhaust
is to free flowing, you need to add some fuel-GOT CHIP? I am going to posts pics as soon as i get to my brothers house now that MARDI GRAS ENDED yesterday-Whew!

 

Is the O2 sensor still in place?

 

Jeff,

Thanks for the reply. My plan now is to install the cat and see what happens. The guy at the exhaust shop doesn't want to do this. Says he doesn't have enough room, and would have to tear everything out and start over. I believe the cat will fit. I may have to do a lot of coaxing, and pleading to get him to try it.

Do you think I would really loose more low end torque with headers? With long tube headers (Banks and Borla) I thought I would gain some. With the short tube headers (JBA and Gibson) I probably would loose some. In my theory that's why JBA and Gibson keep the factory restricted Y pipe, so you don't lose low end torque. Anyway I'll keep you posted....Thanks


DG a.k.a V10KLZZ71S,

I knew your answer even before you replied. If I had the money I would do the duals all the way back. Also afraid it may be too loud. Since I tow a 27 ft TT long distances a "drone" sound for hours would be really unpleasant. You have more mods than me also so you may not see so much low end torque loss. I haven't totally ruled the duals out yet. Going to the exhaust shop first thing Friday morning to find a solution.


Monsta,

Good to hear from you! Havn't seen much activity from you lately. Getting ready for the big move ? Yes, O2 sensor still in stock location. No check engine lights etc. The engine runs really smooth now. Idles much better, and accelerates REAL QUICK ! I'm just not happy with the loss of low end torque, and the V-6 sound.

Thanks to All.........

Mark

 

I don't understand why the muffler shop wants to change mufflers. The 70 Series was designed for towing. I think their about as restrictive as FM mufflers come. Above 3,000 rpm's. Thats a big jump. Since u kinda went and got a new Y-pipe your kinda locked into headers that don't come w/ a y-pipe. I don't think you'll lose any torque w/ adding headers you'll probably gain some more but its likely to move on you again. Reducing the size of pipe may help. How about giving a 21/2" inch cat-back a try. But then wouldn't you need another muffler?

 

UPDATE: Friday morning went to exhaust shop and installed cat. Much quiter, but still sounds like a V-6. Low end torque is better, but not as good as it was with stock Y. At 65 mph and 2100 rpm this thing has a "drone" sound that is horrible. Guess I'll have to get the Banks or Borla headers

If anyone out ther is thinking about modifying their Y pipe DON'T DO IT ! Send me a PM so I can talk you out of it.

Mark

 

Agreed. I am embarrassed to start mine up with the buddies around. I had a Y pipe and Magnaflow put on. Do the Magnaflow and leave the Ypipe. I had no increase in power or gas mileage.

 

what companies fabricate y pipes? what do they cost on average?
i need to find one for an engine swap and want a free flowing replacement for the stock.

 

i dispute the y-pipe being the key to keeping it quiet,before i did my current exhaust set-up, i was running just the converter, and stock y-pipe. It was obnoxious sounding like that also.It is when you open your exhaust system up some that V10 sound comes thru.Nothing other than a QUIET muffler or mufflers will quiet it down.I have adjusted my thinking on the sound of the V10,while it may not sound like a V8,the sound it produces now means i am making more HP, more TRQ,i will put my 6 cyl sounding V10 against most trucks and come out on top.{this is what i tell myself heh heh}

 

DG aka V10KLZZ71S,

Still considering doing the same exact set up as you have. I'm still running the dual 2.5' pipes back to the custom Y, right into the cat, then to the FlowMaster 70 series, stock tail pipe and 3.5 chrome tip. Sounds horrible ! Pffffff at idle. V-6 sound when I accelerate. Loud drone sound at cruize on the highway. How loud is your truck? I don't want loud, at all. A little more than stock is OK. Do you have any noise at cruise speed? I have to do something this thing is really irritating. I don't know if installing a quiter muffler like a FlowMaster 50 series, or a Gibson, would help. I may have to do the dual mufflers, and add a "H" or "X" pipe up front.


scottjohn,

FlowMaster makes a Y pipe section about 18 inches long, you still have to have pipes custom made. Summit sells the Flowmaster Y. Catalog # N12104 page 59. Or go to their web site and search for part number FLO-Y250300 A $37.95

Mark

 

@2000 rpms there is a drone,but other than that it is not too bad at highway speeds.if you dual it use some stock type mufflers instead of free flowing ones like i have. It should still be better than single exhaust imo. with duals MAKE sure you add a h-pipe or x-pipe as this will smooth out those exhaust pulses. Mine was a lot quieter with the h-pipe.by the way my pics are back in my post. {dual exhaust pics}I know your are disapointed in the sound, i was too. but my dual setup sounds the best out of the three different set-ups i tried.good luck, keep us posted.

ps: keep in mind the V10 is obnoxious sounding, so think of performance gains instead of sound and you will be happier.also if your doing these exhaust mods you should think about a chip of somekind to get full benefits from mods. DARYL

 

I feel compelled to chime in.

I have a Banks Power Pack (from the heads to the tail pipe) and I am totally pleased with the performance and the sound.It isn't quite as deep as a big block but does sound healthier than a small block.I can best describe it as sounding like a "medium" block idling a bit fast.But,once you're into it,it sounds good.Deep and throaty for the V10.Many V10's sound "trumpety" to me with various exhaust mods.The Banks does not.
The draw backs to Banks are as follows:
They are a bit arrogant in their advertising,and their customer service could stand some improvement.They are also OVERPRICED.Of course,they pretty well have the Triton V10 complete system market sewn up and can get away with the high price.

If you can afford their overpriced exhaust it is a worthwhile performance and asthetic mod.

I understand that duals are in style,but I have yet to see or hear a practical benefit in this setup on the V10.


Oh yeah,the Banks really does make the V10 run stronger without sacrificing lowend grunt.


I don't want this to come off as being overbearing.I just felt a bit compelled to add my thoughts on this matter.

Thanks