Sponsored
kd1yt
Well-Known Member
The purpose of the loop eliminator is lost on me. The loop is to equalize lengths of the two exhaust banks of the V6, which is a good thing, but that is omitted on many other makes/models.
ShadowsPapa
Well-Known Member
- First Name
- Bill
- Joined
- Oct 12, 2019
- Threads
- 247
- Messages
- 40,461
- Reaction score
- 53,902
- Location
- Runnells, Iowa
- Vehicle(s)
- '25 JTMX, '23 JLU 4xe, '82 SX4, '73 Javelin
- Occupation
- Retired auto mechanic, frmr gov't ntwrk security admin
- Vehicle Showcase
- 3
Would that be similar to the X or H pipe on a V8 exhaust to help even out the notes - and in the process increase power (by installing the H or X)
oldhp3
Well-Known Member
- Joined
- Jun 25, 2020
- Threads
- 4
- Messages
- 102
- Reaction score
- 137
- Location
- Southern Illinois
- Vehicle(s)
- 2021 Galdiator 80th Anniversary
- Occupation
- Retired
The more balanced both exhaust sides are the better. Sometimes you can't do it because of size constraints.
Sponsored
kd1yt
Well-Known Member
Let us know!
I know that people may differ on this but I can't imagine why the factory would have spent the engineering time and additional material cost for the loop, if the loop didn't have some substantial benefit.
bleda2002
Well-Known Member
The point of the loop is the equal lengths, if you are going true dual then you could eliminate it if you end up with equal lengths on each side with out it. I'd actually think with a true dual exhaust having equal lengths is more important to keeping the exhaust flowing equally from the headers.
spectre6000
Well-Known Member
- Joined
- Apr 18, 2021
- Threads
- 10
- Messages
- 555
- Reaction score
- 588
- Location
- Mountains above Denver
- Vehicle(s)
- pending
The loop is an exhaust tuning (as in performance tuning) feature. It's a good thing.
As for sound... It's a V6... The best sounding V6 in the world sounds kinda like an OK I6, and only then on a good day with a tune. You can't make a V6 not sound like crap... Well... You can... But that requires an engine swap with a "plus two cylinders" mod...
It's not a race car. The only actual improvement in my opinion would be to make it quieter. Otherwise, focus your truck bucks on things that matter like tires or something.
As for sound... It's a V6... The best sounding V6 in the world sounds kinda like an OK I6, and only then on a good day with a tune. You can't make a V6 not sound like crap... Well... You can... But that requires an engine swap with a "plus two cylinders" mod...
It's not a race car. The only actual improvement in my opinion would be to make it quieter. Otherwise, focus your truck bucks on things that matter like tires or something.
Sponsored
spectre6000
Well-Known Member
- Joined
- Apr 18, 2021
- Threads
- 10
- Messages
- 555
- Reaction score
- 588
- Location
- Mountains above Denver
- Vehicle(s)
- pending
It's not going to get much better than stock without a lot of money, and that money starts with R&D that I don't know has been done. OEMs in the current era are very incentivized to maximize efficiency (not specifically fuel efficiency, but efficiency in an engineering sense). That sort of exhaust tuning feature would never have been considered in the 60s because no one cared about fuel economy and there were no CAFE standards to meet. These days, OEMs are squeezing about everything they can out of drivetrains. There's not a ton of gains to be made on the aftermarket without sacrificing some other critical aspect (i.e. reliability).
The sound of a V6 sucks. It's my opinion, but I'm not alone there. Opinions aside, it's the very expensive acoustic equivalent of a sticker though. Only this sticker is annoying to those around you on the road and trail, and will probably make your engine run worse.
foo.c
Well-Known Member
In my opinion it's done so that the exhaust pulses from opposite banks don't meet at the same time where they merge into one pipe. You could definitely delete it with a dual exhaust, but should keep it if not.
kd1yt
Well-Known Member
I don't pretend to know the details, but my general understanding is that it is there to, overall, improve exhaust flow and scavenging. I was impressed when I saw it there when I first crawled around under my JT
spectre6000
Well-Known Member
- Joined
- Apr 18, 2021
- Threads
- 10
- Messages
- 555
- Reaction score
- 588
- Location
- Mountains above Denver
- Vehicle(s)
- pending
The details are that the engine fires on an even 120° spacing. Exhaust gases (like air) are fluids, and they have mass, etc. All the requisite features. As an exhaust pulse travels down the exhaust pipe, the moving mass of fluid generates a high pressure zone in front of it, and a low pressure zone behind it. The high pressure is from moving what's already there out of the way, and the low pressure is what's left behind rushing in to fill the void. In isolation, that's about it, but there's a bunch of these things right on top of each other. If you tune the exhaust runners to be equal length, the low pressure zone behind one exhaust pulse can mitigate the resistance of the high pressure zone from the one that follows, and so on. In so doing, it's easier for the exhaust pulses to make their way out of the system. If you combine cooling (and other effects), the negative pressure exceeds the high pressure aspects of each pulse such that there is a net negative. That effect, combined with valve overlap on NA engines (this does not apply for FI engines), results in the exhaust gasses being pulled from the engine by the negative pressure in the exhaust manifold rather than the piston being required to expend energy to push them out (or at least somewhere more favorable along that spectrum). This is called "scavenging". It makes the exhaust flow much more freely, with low to no effort, resulting in better power and efficiency. Removing that loop eliminates the advantages of the scavenging effect, and makes it harder for your engine to expel exhaust gases. That additional effort required to push those gasses has to come from somewhere, and that somewhere is power and efficiency that would have otherwise been used to turn the wheels. You make less power, and get worse fuel economy (the two are directly linked). Also, you make an engine that sounds like ass sound even more assy.
