And at the same time it’s automatically adjusting the settings in the ECU.
actually upon closer review I was mistaken. It’s not adjustable by the driver in stock form. It’s a passive, the car opens the valves automatically under hard acceleration. Apparently though, a lot of people make it user adjustable with a “mild to wild” switch that allows the driver to control when the valves in the mufflers open or close.
There aren’t any differences as far as the ECU goes with this setup apparently on the C6 Corvettes, as Sport mode just turns off the traction and stability control as well as firms up the suspension should you have the magnetic shocks. On the newer C7’s “Track mode” does open the muffler baffles regardless of how much throttle you’re giving it, but I couldn’t find anything regarding it running a different ECU tune, though I would tend to doubt it as that would mean more EPA hoops for GM to jump through in getting the car retested for using each possible ECU tune.
but I couldn't find anything regarding it running a different ECU tune, though I would tend to doubt it as that would mean more EPA hoops for GM to jump through in getting the car retested for using each possible ECU tune.
I didn’t say anything about retuning…just that the ECU is part of the equation. It’s an integral player in the setup.
And from everything I’ve read on the dual exhaust mode from GM…increased performance is at the higher RPM range…and not that significant. Most people buy it for the sound.
Thanks @FoDaddy,dont know what the group would do without you,now 2 querys 1.Is the exhaust system the same on the newer 4&6 cyl Altimas?
2.Does the aftermarket make a muffler like this for vehicles?thanks very good info,FoDaddy.(.Mike keeps us honest ,thanks Mike)
@kmccune
"1.Is the exhaust system the same on the newer 4&6 cyl Altimas?"
No, it only found on the 2002-2006 4 cylinder Altimas. V6 Altimas of that vintage had a dual exhaust. The newer 2007 and up Altimas have dual exhaust no matter what the engine, though it’s sort of a faux dual exhaust. A single pipe that splits into two ends, each with it’s own muffler.
2."2.Does the aftermarket make a muffler like this for vehicles
A few have tried but nobody has really made one that sold well. Currently BBK markets a “varitune” muffler that has manually adjustable valve on it that allows to user to choose how loud they want it.
@kmccune The exhaust on the 2002-2006 4 cylinder Altima was not a dual exhaust. It was a single exhaust. The muffler had a flap/valve on it, that opened under hard acceleration it basically rerouted the exhaust straight through rather than have it have to get past the baffles and such as it would normally do if the valve were not opened. IIRC it worked off of vacuum, there weren’t any electronics involved.
There’s some guy who lives not too far from me who has an old Vega although I can’t remember what the model designation was on this one. Maybe a GT…???
It has the rally stripes down the side, spoilers, different wheels, and so on.
I see it out now and then (saw it today as a matter of fact) and it’s a very clean old car.
The ones with the stripes on the side would have been the later version. The earlier version GTs had one wide stripe down he center. The GTs also came with different wheels. The spoilers were options. Mine were aftermarket.
The later ones also had a slotted plastic front grill that I always thought looked like a WWII military grill. Early vegas had a large rectangular grill with rounded corners. I think the 5mph bumper requirement that motivated the WWII grill became effective in '73. It was an attempt to integrate that 5mph beam into the front end without it being obnoxious looking.
I knew a guy who shoehorned a 400 c.i. big block in a Vega. Crazy toy.
That was not unheard of. The problem was reinforcing the body…it was very flimsy. There was a guy at the hot rod car show in Boston in 2014 who put a 350 in a Vega. He was from Merrimack NH. The car was beautifully restored. Bright Orange.
Putting V8s in Vegas became common. Cosworth sold a complete kit that included a new rearend and subframes. The engine compartment accepted smallblock V8s so readily that there was rumor at the time that GM had designed it to accept a V8 option but never proceeded with the idea.
Every Labor Day weekend Manchester holds an event wherein they close the main street Elm Street) for a day for a custom car & hot rod show. Two or three years ago when I went there was a guy with a V8 Vega. It was gorgeous, beautifully restored with Thrush sidepipes. His Vega had the same aftermarket spoilers mine did, and I talked with him at length. I traded mine in Manchester, so I had to wonder, but it turned out the car came up from Florida. It had NH plates, but I can’t remember of it was orange.
By the way, he told me he couldn’t legally run the sidepipes in NH, which sucks. He had them on anyway just for looks… and they looked absolutely great.