I've read up a little bit here and it seems like almost everyone has played with this.... including me with not so good results.

I had a shop cut the Y pipe on mine and make it true dual with fine performance and the worst sound I've ever heard in my life. This was right after i purchased the truck. I ended up going to the ford dealership and buying a new Y pipe and putting it back on. Without it fully perfect and intact, the only sound I had was a high pitch 4 cylinder sound amplified times 10. It was horrible.

Now that I have the factory Y pipe in place and 3 inch pipe to a flowmaster muffler (no cat) that splits to dual 2.5" it runs fine but still has a high pitch noise above about 2300 RPM's... sounds great below that. I've ran it this way for over a year now.

Any ideas how to make this better without huge and expensive changes? I've got enough into it now that I could have went with the full gibson header setup.....

Info greatly appreciated!

Bryan

 

I feel your pain.The V-10 sounds different due to the odd number of cylenders on each side of the motor.I have a flowmaster 40 and a modified y pipe and i dont think its that bad.You might want to put your cat back and go from there.

 

Yes, that's on the list. Unfortunately I bought the truck used and it had already been removed. I'm thinking a good high-flow cat would help quiet things down and probably even give me a little low end boost.

 

Bryan,

I'm in the same boat as you are. About 3 weeks ago I had my factory Y pipe cut off about 8 inches below the O2 sensors. Ran 2.5 inch pipes back to the muffler, to a custom built Y, and deleted the cat. Well the truck sounded like $#!+. The noise was so loud I had a headache after driving 20 minutes. Also it seemed like I lost low end torque. So Friday morning I went back to the exhaust shop and had the cat reinstalled. Much better, much much much better, really quitened it down, but still sounds like crap. Now I don't know what to do. I can't live with the sound like it is. In your case since you reinstalled the factory Y you will probably be Ok if you install a cat, It made a big difference to mine.

Yea, I'm kind of kicking my self now! With all the changes I have made, and the money I've spent, I'm half way to the price of Borla headers. My truck still sounds like crap !

For anyone thinking about cutting out the factory Y, DON"T DO IT !

Mark

 

Save your money! Our V10 is never going to sound like a big block. I have the Borla header's and y-pipe plus the Borla catback system with the stock cat removed and replaced with a high flow one. The truck doesn't sound bad but not what I would have hoped for. Also I think I lost low end torque with the addition of the headers. I've been toying with the idea of going back to the stock setup for a year but have not been able to bring myself to do it. Click on the Pics in my signature I have a clip in a video album of the eXcursion on the dyno. Listen for yourself.

 

Hey MrRottnDog! Recognize ya from CTS where I kinda hideout as mxoregon. I've been on here a while, read mostly.... don't say much.

BUT, what I wanted to say is the stock Y pipe runs about $200 at your nearby Ford dealer.... it is probably the most noteable item when it comes to making it sound decent. If you want to invest in something to drastically quiet the thing down and make it sound bearable, that's the part. It's odd looking and also tuned to the engine to make each side of the engine somewhat cancel the other out. True dual on the V10 is near impossible unless you put 10 or 15 mufflers on it.....

Surprisingly Ford knew exactly what I wanted. So much so have people messed with this part that our dealer actually stocks a few of them. I just called them up and he said they had one so I went down, picked it up and got it put on and the truck was back to it's old self again, nearly....

Also surprisingly when I bought it, it had glass packs without the cat still running the factory Y pipe and it was quiet. It was very quiet. Thinking I knew better decided to go to work on it and it's never been the same since. The glass packs were actually nice. If adding a cat doesn't help I'm going to try a turbo or something on it rather than the flowmaster.

 

Hi alieng,

Yeah I see ya posting on CTS occasionally. I never kept my stock headers or y-pipe when I had the headers installed. Fortunately one of the guys here who had the Banks headers etc. gave me his for just the shipping. So I have them in case I decide to go that way.

It really doesn't sound bad and it's not that loud. Some think the reason I'm running lean with the KB supercharger is because of the headers. So if I do Take them off that would be the reason.

 

This has been discussed before and the firing order on the V10 is nice and even. One bank fires, then the other one. Back and forth, nice and even. Check the firing order.

The more I listen to the exhaust, the more I think it's valve timing that creates that horrible little buzz. Tuned for low-end torque, it sounds like a 4-banger with variable valve timing. They advance the valve-timing to push the low-end torque, at least on the intake valves. Same thing with the V10.

To get the torque curve (or lack thereof) this thing has, they must have pushed the envelope on valve-timing. Short of regrinding your cam(s), I doubt you're going to get rid of it. All you can do is mask it with the muffler/cat

ak

 

Yes, it's an even firing engine. It always fires two cylinders at one time on opposite sides of the engine... which makes it very smooth and gives it lots of torque... also makes it somewhat like a straight 5!

Bryan

 

Man, what have you been smoking??? It does not fire two cylinders at the same time... firing order for the V10 is 1-6-5-10-2-7-3-8-4-9

Firing is 72 degrees apart, not 90 like a V8. 72 degree firing is what makes it smoother than a V8.

ak

 

Sorry, that was from reading here somewhere before. I'm gullible and believe everything I read.

I don't understand the V10. It's a mysterious engine......

If you think something will be right, do the opposite and you'll have it. I don't work on mine for just that reason. I'll stick to my old 460 when I get bored and want to rip something apart. At least I understand it completely!

 

I think you're short-changing yourself. The only thing the V10 has that a V8 doesn't is a balance shaft. Two extra pistons moving in different directions makes that necessary. Other than that, just add two to everything!

ak

 

Man, I "thought" I wanted dual exhaust....second thoughts?????

 

Alright...now I understand engines and all but...well...anyway...

so what you're saying is that the V10 needs to make 2 complete revolutions before all the pistons fire? 72°x10 = 720° / 360° = 2.

Am I missing something? I guess I always thought that all the pistons would end up firing for each revolution of the crank.

The crank is a 72° crank, right? But shouldn't it fire at 36° intervals?

I confused.... Maybe I should just stick to parellel twins.

 

__________________________________________________ _

Think about it....................
4 stroke engine

1 crankshaft revolution=piston down (intake)
piston up (compression)
2nd.or next crankshaft revolution=piston down (power)
piston up (exhaust)


The camshaft only makes one revolution for every two revolutions of the crankshaft.