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Chris B
Dodge Dakota
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2/24/2002
17:02:23
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 Subject: turbolator power exhaust tips
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I was just wondering if anybody heard of turbolator exhaust tips? JC whitney claims they improve fuel economy by 8.3% by using a control valve inside the tip thats regulates exhaust flow. Does anybody know if these really work?
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teamfast
Dodge Dakota
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2/24/2002
19:33:50
|  RE: turbolator power exhaust tips
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OMG by the time the xhaust reaches the tip
there is no effect on power, economy, or
performance. What are you, a ricer in
disguise?
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xplikt
Dodge Dakota
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2/24/2002
20:51:42
| RE: turbolator power exhaust tips
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He/she was just asking. I have never heard of this thing? Does it change the back pressure since I'm guessing the exit size changes. I hope they dont have it close all the way, someone walking by one day closing it would kinda suck.
Sounds a lil fishy to me.
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Chris B
Dodge Dakota
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2/24/2002
23:26:15
| RE: turbolator power exhaust tips
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yeah I'm a ricer smart guy, any way this valve responds to the engines RPM load and temperature to equalize pressure and regulate exhaust flow.
I'm kinda skeptical about this product my self, but they explain in better at jcwhitney.com
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Tony
Dodge Dakota
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1/10/2003
22:41:48
| RE: turbolator power exhaust tips
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Yeah I saw these too and was wondering the same thing. Not sure if its legit, but if it is, I want one.
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ryan
Dodge Dakota
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4/11/2004
13:52:42
| RE: turbolator power exhaust tips
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One thing unless you have holes all over your exhaust pipes the gas comes out the end of the pipe(the tip). So obviously having a valve there does have some effect. Ever seen beverly hills cop the banana trick, that works. Plug the end of the pipe and no go very quickly. While obviously the pressure is stronger up by where your exhaust headers/logs. There is still air flow at the back so it could be regulated there. If it really is epa certified then it must have passed an offical test done by a epa representative.
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.boB
Dodge Dakota
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4/11/2004
14:38:44
| RE: turbolator power exhaust tips
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Another gimmick for the unwary. It looks cool I guess, and that's about it. The Dakota is a long vehicle. By the time exhaust gasses get to the end of the pipe, they are pretty well cooled off. Put your hand back there and find out.
At that point, the exhaust gases don't need to be "regulated". They need to be left alone for easy exit.
As for the EPA, all they certify is that it has no effect on emissions.
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colin
Dodge Dakota
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3/17/2006
17:45:47
| RE: turbolator power exhaust tips
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Hey- I have a 2004 Liberty V6 which has a lot in common with the new Dakotas. This turbolator thing apparently will improve fuel economy when you are in stop & go traffic (low speeds).
I think this may be helpful for my morning commute on 495 when it sometimes takes 15 minutes to drive 2 miles!
Other than stop & go traffic the "flap" or whatever mechanism helps keep in the backpressure -- the exhaust should flow freely.
Backpressure is something that has to be just right as far as performance is concerned. If you have a lot of backpressure, you won't move very fast at all. If you have too big of an exhaust openening, you will be getting rid of too much backpressure which will make you lose some of your low-end torque.
With heavy vehicles like ours (4000+ pounds) backpressure is good to get us moving in stop & go traffic. I am going to give this thing a try.
By the way-- dont buy from jcwhitney, they cost too much $. Go to www.performancepeddler.com
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colin
Dodge Dakota
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3/17/2006
21:09:04
| RE: turbolator power exhaust tips
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never mind... check this out... http://www.legacygt.com/forums/showthread.php?t=8136
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N56629
Dodge Dakota
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3/17/2006
21:26:03
| RE: turbolator power exhaust tips
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Sounds like we have some prime candidates for an electric supercharger.
"Destroying a myth.
Some say that "an engine needs backpressure to work correctly." Is this true?
No. It would be more correct to say, "a perfectly stock engine that cannot adjust its fuel delivery needs backpressure to work correctly." This idea is a myth. As with all myths, however, there is a hint of fact with this one. Particularly, some people equate backpressure with torque, and others fear that too little backpressure will lead to valve burning.
The first reason why people say "backpressure is good" is because they believe that increased backpressure by itself will increase torque, particularly with a stock exhaust manifold. Granted, some stock manifolds act somewhat like performance headers at low RPM, but these manifolds will exhibit poor performance at higher RPM. This, however does not automatically lead to the conclusion that backpressure produces more torque. The increase in torque is not due to backpressure, but to the effects of changes in fuel/air mixture, which will be described in more detail below.
The other reason why people say "backpressure is good" is because they hear that cars (or motorcycles) that have had performance exhaust work done to them would then go on to burn exhaust valves. Now, it is true that such valve burning has occurred as a result of the exhaust mods, but it isn't due merely to a lack of backpressure.
The internal combustion engine is a complex, dynamic collection of different systems working together to convert the stored power in gasoline into mechanical energy to push a car down the road. Anytime one of these systems are modified, that mod will also indirectly affect the other systems, as well.
Now, valve burning occurs as a result of a very lean-burning engine. In order to achieve a theoretical optimal combustion, an engine needs 14.7 parts of oxygen by mass to 1 part of gasoline (again, by mass). This is referred to as a stochiometric (chemically correct) mixture, and is commonly referred to as a 14.7:1 mix. If an engine burns with less oxygen present (13:1, 12:1, etc...), it is said to run rich. Conversely, if the engine runs with more oxygen present (16:1, 17:1, etc...), it is said to run lean. Today's engines are designed to run at 14.7:1 for normally cruising, with rich mixtures on acceleration or warm-up, and lean mixtures while decelerating.
Getting back to the discussion, the reason that exhaust valves burn is because the engine is burning lean. Normal engines will tolerate lean burning for a little bit, but not for sustained periods of time. The reason why the engine is burning lean to begin with is that the reduction in backpressure is causing more air to be drawn into the combustion chamber than before. Earlier cars (and motorcycles) with carburetion often could not adjust because of the way that backpressure caused air to flow backwards through the carburetor after the air already got loaded down with fuel, and caused the air to receive a second load of fuel. While a bad design, it was nonetheless used in a lot of vehicles. Once these vehicles received performance mods that reduced backpressure, they no longer had that double-loading effect, and then tended to burn valves because of the resulting over-lean condition. This, incidentally, also provides a basis for the "torque increase" seen if backpressure is maintained. As the fuel/air mixture becomes leaner, the resultant combustion will produce progressively less and less of the force needed to produce torque."
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ewraven
Dodge Dakota
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3/18/2006
14:09:37
| RE: turbolator power exhaust tips
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I'm not saying whether this thing will work or not but there are cars today that come from the factory with valves at the end of the exhaust.
Pretty much any Nissan with the VQ35de engine; they have a flapper valve in the muffler that opens depending on how much exhaust is flowing, just like this thing mentioned above. The QR25 powered Sentra Spec V has this as well.
The new Corvette Z06 has butterfly valves in the exhaust tips on it, they are computer controlled.
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GraphiteDak
GenIII
3/18/2006
15:48:14
| RE: turbolator power exhaust tips
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Yes, BUT I think they use the flapper to keep it as quiet as possible on normal driving, and then BYPASSING some of the muffler baffles for a more straight through muffler under the higher load.
That's just their way of making a performance muffler be quiet when need be.
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GraphiteDak
GenIII
3/18/2006
15:51:40
| RE: turbolator power exhaust tips
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BTW. Talking about busting the "backpressure theory" to hell.
Look at my truck. It had stock pipes from the mainfolds probably just under 2" going to a single 2 1/2" pipe.
I cut my exhaust OFF at the manifolds and went DUAL 2 1/2" pipes from there to dual 2 1/2" cats, two 2 1/2" Flowmasters continuing 2 1/2" over to the tailpipe where it jumps to 3 1/2" out the last 2 feet of chrome tail pipes. NO X-PIPE!
The truck actually rips the tires even WORSE from a standing start!
Backpressure???? WHAT backpressure???
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OBIO3
Dodge Dakota
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3/18/2006
20:26:31
| RE: turbolator power exhaust tips
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Graphitedak.... Well said and I'm going to add a bit here that anybody can undewrstand. As you said, A bigger or duel exhaust DOES INCREASE POWER as your saying. What I bet none of these torque oriented back preasure guys do not realize is If you was to take a stock exhaust {{which is factory designed for proper performance)) And drill a hole in the pipe infront of the converter which is where so many say there is lots of back presure, put say a 3/16 pipe in a tightly drilled hole and hooked a LOW PRESURE guage to it, They would be amazed to learn there is at most 2 to 3 pounds of presure. This is with engine reved up!!!!!!!! . If you was to discover you had say 4 pounds or more, your all messed up. Converter is plugged or pipe is crimped or muffler pluged . This is fact. So much for there back preasure theory. 2 Stroke engines need a PREASURE CHAMBER in the exhause to come alive but no valves here. That'd what makes it worke.
So many problems ... So little time
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ewraven
Dodge Dakota
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3/18/2006
20:38:40
| RE: turbolator power exhaust tips
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GraphiteDak,
Yeah, that's what those valves are for. To keep the car quiet in everyday driving.
And if I remember right, the two center outlets on the Z06 where the valves are, are non muffled. Whereas the two outer outlets flow through the muffler. Don't take my word for it though; that's just what I am guessing from seeing the pictures.
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OBIO3
Dodge Dakota
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3/18/2006
22:55:08
| RE: turbolator power exhaust tips
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Forgot to mention an other presure remover that everybody with a little wisdom does > when you put duels on, you but a cross over pipe in as close to headers as you can get.Reason again is to help relieve all the presure you can. All this has got to make sense to those who think you have to have presure.My intentions are not to cut anybody down. We all learn and at times we believe those that aso picked it up from someone else and so on . Just because someone sayed it doesn't mean it's fact.
So many problems .... So little time
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colin
Dodge Dakota
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3/18/2006
23:38:00
| RE: turbolator power exhaust tips
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hey guys--- this link has a little info on helping you choose pipe sizes: check around the middle of the page or so.
http://auto.howstuffworks.com/framed.htm?parent=muffler.htm&url=http://www.nsxprime.com/FAQ/Miscellaneous/exhausttheory.htm
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bigdave
Dodge Dakota
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3/20/2006
22:37:07
| RE: turbolator power exhaust tips
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Hey, my Yamaha has a valve system in the exhaust and its never quiet. That blows that theory right out of the water. I bypassed the valve one day by disconnecting the cable and keeping the valve open and the bike was OK on acceleration. Could not get the front wheel up, no 0-60 in 4.6. Hooked it back up and realized what it really did. It is called the EXUP system, and it works, and all it does is create BACK PRESSURE.
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Shatto
Dodge Dakota
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3/25/2006
21:49:01
| RE: turbolator power exhaust tips
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If there is a 100% money back guarantee, try em and report back to us.
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Jeep Liberty
Dodge Dakota
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3/25/2006
21:58:54
| RE: turbolator power exhaust tips
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I bought a 2 1/2 inch turbolator (angled tip, rolled edge) from www.performancepeddler.com for $40 bucks. No charge for S&H.
I am having it welded on the first week of April. I will change my oil and filter shortly afterward. I will try to run it for at least 3 tank fulls before reporting back any results.
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N56629
Dodge Dakota
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3/26/2006
10:52:42
| RE: turbolator power exhaust tips
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For those of you that want to play with backpressure try this --- http://www.supertrapp.com/product_sections/auto/index.asp
They work well on short exhaust systems like motorcycles but I don't know about cars and trucks. I'm not a fan of backpressure but I thought some of you might be interested especially if you are considering a total exhaust overhaul.
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