Exhaust question

[Rushingman]

So 4runners aren't the only vehicles with the 4.7 V8.
But I feel like all the others vehicles with exhausts, sound so much better.
Why is that?
I have my muffler cut off on my runner, it sounds good. But I saw a video the other day of a dodge with an exhaust and it sounded a lot better.

 

[CruzadoBlanco]

So 4runners aren't the only vehicles with the 4.7 V8.
But I feel like all the others vehicles with exhausts, sound so much better.
Why is that?
I have my muffler cut off on my runner, it sounds good. But I saw a video the other day of a dodge with an exhaust and it sounded a lot better.

because the toyota V8s are designed much different than most others and vice versa. the toyotas are a DOHC with 4 valves per cylinder and are undersquare (bore is bigger than the stroke). compared to say a GM LS which is still pushrod 2v per cylinder and range from square to over square. the dodges depending on what year they are can be the old magnum v8s or the new hemi's. the magnums for the most part are a old pushrod design the 4.7HO being the out lire. the hemi's are well hemi's so they have a very unique sound that i personally think sounds like a gargly wet fart, but thats just me.

 

[m85476585]

Just speculating, but...

The 4runner might have different headers than something bigger like a Tundra, Sequoia, or Land Cruiser to fit the engine in the smaller bay.

I think the 4runner has some kind of intake resonator to make it quieter. And there's the exhaust resonator and the HUGE muffler (which you say you cut off). I don't know if other Toyotas with the same engine have those features.

a very unique sound that i personally think sounds like a gargly wet fart, but thats just me

Personally I think a lot of trucks with loud exhaust sound like drowning wookies. I haven't paid enough attention to say which engines or even which trucks it usually is.

 

[black4vcobra]

because the toyota V8s are designed much different than most others and vice versa. the toyotas are a DOHC with 4 valves per cylinder and are undersquare (bore is bigger than the stroke). compared to say a GM LS which is still pushrod 2v per cylinder and range from square to over square. the dodges depending on what year they are can be the old magnum v8s or the new hemi's. the magnums for the most part are a old pushrod design the 4.7HO being the out lire. the hemi's are well hemi's so they have a very unique sound that i personally think sounds like a gargly wet fart, but thats just me.

The 2UZ-FE is actually an oversquare engine with a bore of 3.7" and a stroke of 3.3"

You are right otherwise as different engines have different camshaft configurations - pushrod, SOHC, DOHC, and anywhere from 2 to 5 valves per cylinder.

In addition to camshaft configurations, camshaft specifications, firing order, exhaust configuration, compression ratio, firing order and combustion chamber shape will all effect how an engine sounds.

The 2UZ-FE was originally designed to be a quiet engine as an earlier version in the engine line, the 1UZ-FE was installed in the 1989 Lexus LS 400 so don't expect "muscle car" sounds out of a catback only 4Runner.

The other problem is that other than custom exhaust work, there is no way to get a true dual exhaust setup out of a 4Runner and that is what I think really makes an exhaust note sound great.

 

[CruzadoBlanco]

The 2UZ-FE is actually an oversquare engine with a bore of 3.7" and a stroke of 3.3"

You are right otherwise as different engines have different camshaft configurations - pushrod, SOHC, DOHC, and anywhere from 2 to 5 valves per cylinder.

In addition to camshaft configurations, camshaft specifications, firing order, exhaust configuration, compression ratio, firing order and combustion chamber shape will all effect how an engine sounds.

The 2UZ-FE was originally designed to be a quiet engine as an earlier version in the engine line, the 1UZ-FE was installed in the 1989 Lexus LS 400 so don't expect "muscle car" sounds out of a catback only 4Runner.

The other problem is that other than custom exhaust work, there is no way to get a true dual exhaust setup out of a 4Runner and that is what I think really makes an exhaust note sound great.

oh right my bad i always get over and under square mixed up, thats why im a EE and not a ME. but ive spent more time than id like to admit tearing into friends vehicles todo extensive maintenance since i was the only one who knew how, so thats where i learned most of my stuff. but to add to the UZ family stuff. the 2uz and 1uz share the same block with the exception being iron vs aluminum and the 2uz has a bolt main and the 1uz has a 6. the heads are interchangeable for most years and from what ive read but not seen so are the cams as long as its nonVVTi-nonVVTi or VVTI-VVTi. i still find it weird that the UZs dont gain crap from bolt ons but you add any boost and it takes you to the moon.

 

[rooost]

Yea personal taste...but I would really say the 4V OHC layout and generally the Japanese motors are more refined..than the "American" V8s

If you are talking specifically Toyota 4.7, the parts available to the 4R layout are a bit smaller than the bigger trucks

Since you are a "just cut it off guy" can we assume you want more violence in the sound? If you have not then go K&N or similar CAI...that makes a sound I like and it is very audible in the cab! Equal or better than my Magnaflow in volume