How is the intake system coming along btw? very curious. I have enjoyed my midpipes FYI (i got lesgarten's old ones)
thanks
ARCHIVE 100 Series Cat-back Exhaust
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How is the intake system coming along btw? very curious. I have enjoyed my midpipes FYI (i got lesgarten's old ones)
thanks
- Thread starter
- #462
Hi Redcrayon, good to hear you're enjoying your EMSPowered midpipes. The EMSPowered 100-series intake sysems should be ready to ship shortly after the EMSPowered 100-series headers. They're being finished up as we speak.
Hey Bak,
What causes the drone?
I only get the droning when the engine can't put out enough power.
I put my truck in LOW range today and noticed something interesting: the drone seems tied to "how much the truck is struggling" to get up a hill. The drone is gone, going up hill, in LOW. I have plenty of power and no drone. Put it in HI, and immediate drone at same RPMs.
What exactly causes this drone? What is it? I can't stop thinking about it, so I am just very curious at this point.
It's definitely related to load - doesn't happen at specific RPMs but under a specific type of load... load when the engine is at its limit and depressing the skinny pedal doesn't give you any more juice.
I now think the drone is very much tied to what kind of tires and gearing you're running. Since I can only hear it when I am struggling up a hill, and since I never struggled up hills / had issues downshifting before adding tires, and finally since once I switch to low range I don't get the drone, I think the worst of it depends on your truck.
Any others in PDX with EMS Exhaust? I want you to drive my truck and compare!
What causes the drone?
I only get the droning when the engine can't put out enough power.
I put my truck in LOW range today and noticed something interesting: the drone seems tied to "how much the truck is struggling" to get up a hill. The drone is gone, going up hill, in LOW. I have plenty of power and no drone. Put it in HI, and immediate drone at same RPMs.
What exactly causes this drone? What is it? I can't stop thinking about it, so I am just very curious at this point.
It's definitely related to load - doesn't happen at specific RPMs but under a specific type of load... load when the engine is at its limit and depressing the skinny pedal doesn't give you any more juice.
I now think the drone is very much tied to what kind of tires and gearing you're running. Since I can only hear it when I am struggling up a hill, and since I never struggled up hills / had issues downshifting before adding tires, and finally since once I switch to low range I don't get the drone, I think the worst of it depends on your truck.
Any others in PDX with EMS Exhaust? I want you to drive my truck and compare!
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The drone is a resonant frequency where the engine exhaust pulses create a standing wave and we perceive the frequency as drone.
Constant 1800-2300 rpm. In any gear will reproduce it.
Constant 1800-2300 rpm. In any gear will reproduce it.
- Thread starter
- #465
Client's Land Cruiser having an EMSPowered cat-back exhaust installed. Get yours today! http://www.emspowered.com/storefront/index.php?main_page=index&cPath=61_119_199_200
I just got done boxing up another one of these amazing looking systems for an eager customer.
He's the first one to take advantage of our NEW SALE price on this system. Check it out and get them just in time for camping/off roading season.
He's the first one to take advantage of our NEW SALE price on this system. Check it out and get them just in time for camping/off roading season.
http://www.emspowered.com/storefron...uct_info&cPath=61_119_199_200&products_id=757
So you don't have to waste precious time searching for the aforementioned sale.
So you don't have to waste precious time searching for the aforementioned sale.
- Thread starter
- #468
The EMSPowerd 100-series Performance Cat-back Exhausts are on sale for $100 OFF till the end of the month. GET YOUR ORDERS IN! http://www.emspowered.com/storefron...uct_info&cPath=61_119_199_200&products_id=757
I've heard, but I don't know if it's true or not, that people are waiting for headers to bolt them to...
- Thread starter
- #470
The EMSPowered Catback exhaust system is designed to bolt directly to the factory midpipes and factory headers as well as aftermarket ones.
Oh it's true. I'm waiting on headers...
Just sayin...
Has anyone tried changing out the midpipes alone without upgrading the exhaust?
I’m interested in swapping out the midpipes for some straight non-cat non-resonator pipes. Firstly, I assume this is doable from a physical standpoint?
There’s no dyno for this particular configuration, but I’ve seen some pretty solid gains with this type of mod on other vehicles. This would seem like a pretty cost effective solution without introducing much noise to get more hp.
I really would like to pull the trigger on this if it’s possible.
I’m interested in swapping out the midpipes for some straight non-cat non-resonator pipes. Firstly, I assume this is doable from a physical standpoint?
There’s no dyno for this particular configuration, but I’ve seen some pretty solid gains with this type of mod on other vehicles. This would seem like a pretty cost effective solution without introducing much noise to get more hp.
I really would like to pull the trigger on this if it’s possible.
I would also like to replace my rusty old catalytic converters with the non-cat midpipes.
My only concern is that I will get the Check Engine light for "catalyst efficiency".
How can the EMS midpipes eliminate the cats without triggering the CEL?
Are data from the post-cat O2 sensors used for anything other than triggering the CEL?
I want to lose the cats, but need some reassurance that elimination of the catalytic converters will not confuse the ECU and fuel trim in the long run.
EMS looks like they are using an ‘O2 fouler’ type workaround that has been used successfully on OBD2 vehicles for a while. If you look at the pictures of the mid-pipe, you’ll see an O2 bung that is welded to a pipe that is somewhat removed from the exhaust stream.
Another common way in the aftermarket is to use an ‘O2 simulator’.
The post-cat O2’s primary task is to monitor catalyst efficiency. Though I know for a fact for tuning turbo Lexus’s, that Toyota’s ECM logic will use the secondary O2’s to a small degree for closed loop feedback if the primary sensors are not working as expected.
I replaced my midpipes with the EMS no cat, no resonator pipes and drove about a month before I put the DT catback on.
With the straight midpipes and everything else stock, there was no appreciable change in tone or volume of the exhaust note. My wife didnt even know I'd changed a thing when I asked her if it sounded diff (not that she is some sort of authority on exhaust sounds - just to make the point that a casual observer noticed no difference).
The CEL will not come on due to cat inefficiency. The downstream o2 sensor is offset 'out of the flow' and there is even a little lip to further hide the exhaust gasses from the downstream sensor. I've had mine for 2+ months with no light or issues.
There was a noticeable increase in power with just the midpipes - more so with the catback. But, nonetheless there is more pep with the larger midpipes and no cats. Lol. I don't have dyno info or anything
With the straight midpipes and everything else stock, there was no appreciable change in tone or volume of the exhaust note. My wife didnt even know I'd changed a thing when I asked her if it sounded diff (not that she is some sort of authority on exhaust sounds - just to make the point that a casual observer noticed no difference).
The CEL will not come on due to cat inefficiency. The downstream o2 sensor is offset 'out of the flow' and there is even a little lip to further hide the exhaust gasses from the downstream sensor. I've had mine for 2+ months with no light or issues.
There was a noticeable increase in power with just the midpipes - more so with the catback. But, nonetheless there is more pep with the larger midpipes and no cats. Lol. I don't have dyno info or anything
Glad to see that my Midpipes have moved on to a happy home. They were very unhappy at my house, just layin' around and not doing anything!
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