True Duals on a Silverado ???

how can you put true duals on a silverado ??
there's the exhaust sensor in the cat convertor....
how do you get around that ?... and does it damage the motor in any way ?

and is it a big increase from just changing the muffler and tips ?

i'm new to the board, please let me know

welcome, umm i dont think there really is anything called TRUE DUALS iam sure that they'll connect via x-pipe or cross pipe to even out the presure between the 2 for better performace, i could be wrong? be sure to check out the banks power pk look's like a winner?

damn sorry about hte double post's guys umm i have seen FAKE o2 sensors that send a signal to the ecm to trick it into thinking they are installed i guess it always sends a return signal of .5v

Well first off there is no sensor IN the cat..... there is one before AND after on EACH side......4 o2 sensors in all. A true dual system is what i consider i have on mine..... Each side is seperate from the other....... one cat , one muffler on each side. I had my system installed by getting the muffler shop to cut the factory exhaust off just before the "Y" pipe where it is still 2 pipes and had them continue dual the rest of the way. They also installed a balancing tube or blending tube as it is sometimes called because I had an issue of power loss initially after system was installed and they thought that the tube might help, which it did not. Anyways , that is what i call a true dual system, each side is independent from the other, not just a single in , dual out muffler. Oh and by the way I did get the power back eventually, when the computer was able to make the necessary adjustments on it's own (disconnecting the battery did not help)

Was in the middle of typing my post when busta entered his. I was gonna add that it kinda depends on how a person would define "true duals". I had duals on my 88 full size jimmy, no crossover pipe, the same with my 96 sierra with the 5.7, man that thing went. 255/85/16's on it and when doing 35-40 kmh if i floored it , it would break them loose when it kicked down and then chirp them into second. :biggrin:

I'm running a dual setup, but opted to install an xpipe before the two headers to even out the exhaust flow. My long tubes had bungs in them for the front 02 sensors, and I had the rear 02 sensors removed from the computer. I also deleted the cats.

so im going to get a "dual" exhaust put on my 02 silverado next week........I have an original 40 series flowmaster (single in dual out) that im having them put on instead of the crappy v-force muffler that they offer....is this even going to be worth it?? I know its not "true Duals" but its all i can afford....is it worth it??

Thanks :confused:

so im going to get a "dual" exhaust put on my 02 silverado next week........I have an original 40 series flowmaster (single in dual out) that im having them put on instead of the crappy v-force muffler that they offer....is this even going to be worth it?? I know its not "true Duals" but its all i can afford....is it worth it??

Thanks :confused:

I think you'll be happy with the sound and performance. Go for it. :biggrin:

Yea, mine is the same way...single in, dual out. I like it. I wasent really down on spending all that money to put in true duals, but i will say, my system sounds just as good as most trucks who do have "true" duals. My one friend crawled under my truck a few months ago...all I heard was.."You only have one muffler? damn!" I guess he was expecting something more impressive. I also got a nice bit od added hp. I have also cherped them while already doinr 20-30 mph. I was impressed. Im sure its not good for the tranny, but its fun.

yeah, i was gonna copy the system on sshotrods.com.. with the dean lapole headers, xpipe, 40 series, and maybe some high flow cats... but now people are saying the single in, dual out is like the same performance....

i got a 4.8... incase i get indicators for the o2 sensors.... i cant find any simulators for the 4.8.. only the 5.3 and bigger...maybe they'll interchange ?


im not used to modding newer vehicles... i'm used to the old school stuff, with carbs, not tbi =]


please let me know the best option for sound & performance..

how about a tuner ? should i go with a programmer ? or send off my PCU

yeah, i was gonna copy the system on sshotrods.com.. with the dean lapole headers, xpipe, 40 series, and maybe some high flow cats... but now people are saying the single in, dual out is like the same performance....

i got a 4.8... incase i get indicators for the o2 sensors.... i cant find any simulators for the 4.8.. only the 5.3 and bigger...maybe they'll interchange ?


im not used to modding newer vehicles... i'm used to the old school stuff, with carbs, not tbi =]


please let me know the best option for sound & performance..

how about a tuner ? should i go with a programmer ? or send off my PCU

This is the best way I can explain my feelings on true dual setups. There is no doubt these trucks run better off of backpressure. A true dual setup will knock out some low end grunt but make it up in the upper power band. On a slightly modified/stock truck, I would not go with a true dual setup, because the low end loss would be extremely noticeable and probably wouldn't be made up enough in the higher range to compensate for the low end loss. An xpipe definately helps to smooth out exhaust flow. I went with the true dual setup because my setup is for mid/high range power band. My cam powerband is 1600-6600rpms and I have a 3000 stall converter, not to mention a 6.0L. The stall allowed me to let go of some of the bottem end, because at full throttle, my rpms never drop below 3200rpms.

So, bottom line, a single inlet dual outlet muffler with the cats will allow for enough backpressure to keep the low end grunt, so I would stick with that.

Some guys will argue that backpressure has nothing to do with anything on this truck. The best thing I can tell them is let me take you for a ride, both with my cutouts closed and cutouts open. With them open(they are right behind the headers), my truck really feels sluggish(compared to closed) until I reach the high end rpms. That is proof alone the backpressure is needed.

so leave the Y pipe and just change the muffler and tips ?

i was thinkin about headers also...

you recommend just change the muffler and tips ?

ya change the muffler and tips for sure! and if you buy headers EVERYONE says go with the long tube not the shorty's!

whats wrong with the shorty's ??

whats wrong with the shorty's ??

They don't flow a whole lot more than the stock manifolds. You won't see near the performance with shorties that you will with mid lenght or long tubes. Check out Summitracing. They offer some Doug Thorley long tubes for our trucks at aroun $430. Not much more and in some cases less than shorties. Good luck on your decisions.

i've been writing all this stuff down, what to get... money's not the issue.. deciding is the main factor

i've also been looking at the dynatech supermaxx long tube headers, you can get them with the high flow cats in a system, nineball turned me on to that squires turbo systems and that looks worth it to me

its not too badly priced either...

i have to get rid of my other toys and focus on my truck, i already ditched the airboat, and jetski... now im ditchin my raptor atv...

i never have time for them anyways



thanks for all the help guys.... soon as i find a way to... i'll show pics of my truck (my baby)

so im going to get a "dual" exhaust put on my 02 silverado next week........I have an original 40 series flowmaster (single in dual out) that im having them put on instead of the crappy v-force muffler that they offer....is this even going to be worth it?? I know its not "true Duals" but its all i can afford....is it worth it??

Thanks :confused:

So has anyone done this themselves?? I ordered the FM off ebay and am thinkin of doing this my self ( i have a pipe bender and welder) but it cant be too hard can iT? Anyone have any experiences with running the pipes under the 02 silvys??

Thanks

So has anyone done this themselves?? I ordered the FM off ebay and am thinkin of doing this my self ( i have a pipe bender and welder) but it cant be too hard can iT? Anyone have any experiences with running the pipes under the 02 silvys??

Thanks

Kinda confused on what you want to do. Are you talking about running a dual system, or a single inlet/dual out system with tips? I think I'm just confused here. :rofl:

Kinda confused on what you want to do. Are you talking about running a dual system, or a single inlet/dual out system with tips? I think I'm just confused here. :rofl:


Sorry slow.....Im planning on running a single in dual out FM 40 series and tips....just wondering where to rout the pipes, hangers, ect...


Thanks

Sorry slow.....Im planning on running a single in dual out FM 40 series and tips....just wondering where to rout the pipes, hangers, ect...


Thanks

Gotcha. How do you want the tips to exit? Straight out the back, one behind each wheel? The two tips together behind one wheel? The sport truck look with the two in front of the wheel? Let me know, and I might be able to get you some under bed pics of a setup you're looking for. I have friends that have pretty much every system above.

Gotcha. How do you want the tips to exit? Straight out the back, one behind each wheel? The two tips together behind one wheel? The sport truck look with the two in front of the wheel? Let me know, and I might be able to get you some under bed pics of a setup you're looking for. I have friends that have pretty much every system above.


Thanks so much man.....im retarded... i want the pipes straight out the back with two - 3 inch diameter stainless tips.....

Again, thanks for helping.....

Thanks so much man.....im retarded... i want the pipes straight out the back with two - 3 inch diameter stainless tips.....

Again, thanks for helping.....

I'll get you some pics this weekend of a similar setup. :smile:

I'll get you some pics this weekend of a similar setup. :smile:

thanks bro.....need all the expert advice i can get


Thanks

Here's a few pics for ya.

http://home.earthlink.net/~lalito/eddie/dualexit.jpg

http://home.earthlink.net/~lalito/eddie/under2.jpg

I can get some more if needed.

Here's a few pics for ya.



Wow dude, you are the shit...

Thanks soo much man


PS.....

Good place to get some pipe??? got the 40 series need pipe

Thanks

would it be stupid to just put some turn-downs right after the muffler??

Alot easier, but will it impact the performance at all???

would it be stupid to just put some turn-downs right after the muffler??

Alot easier, but will it impact the performance at all???

That's what most people are doing these days. It seems as though the tips out the back are giving way to dumped mufflers. They are putting dumps(turndowns) right out of the muffler. That's what my truck has on it, only I have two mufflers with single outlets. It gives it a deeper sound, IMO.

You won't lose any performance doing this and its alot easier.

That's what most people are doing these days. It seems as though the tips out the back are giving way to dumped mufflers. They are putting dumps(turndowns) right out of the muffler. That's what my truck has on it, only I have two mufflers with single outlets. It gives it a deeper sound, IMO.

You won't lose any performance doing this and its alot easier.

Awesome man...not to be lazy but i think it looks better too (everyone has the duals kickin out the rear) and a better sound will be cool too.

THanks for the input.........Im going to try and put it on tonight

Awesome man...not to be lazy but i think it looks better too (everyone has the duals kickin out the rear) and a better sound will be cool too.

THanks for the input.........Im going to try and put it on tonight

Cool, let me know how it turns out! :naughty:

Cool, let me know how it turns out! :naughty:


Ok.....so it sounds BAD ASS! The turn downs look and make it sound sweet....Thanks,

Now that the exhaust is on, anything else to do? Will the truck auto-adjust (computer wise) or is it good to go?

By the way- tons of get up and runs cooler too

Ok.....so it sounds BAD ASS! The turn downs look and make it sound sweet....Thanks,

Now that the exhaust is on, anything else to do? Will the truck auto-adjust (computer wise) or is it good to go?

By the way- tons of get up and runs cooler too

You're good to go. The computer won't have much adjustment to make, and yes, they are really good about adjusting. It took my pcm several days to adust to the idle when I did all of this. I'm glad you like how it sounds and looks. I've always loved my exhaust systems dumped.

I have straight pipes. That is as true dual as it gets. I have a 2500LD 6.0L Vortec V8. One pipe for each header, no muffler, and a cat. converter. It sounds awesome. Loud as heck, but only if you get on it.

I've got a '97 Z71. Exhaust broke at the connection to the exhaust manifold. Dealer wants $750 for new TWC. I'm trying to decide if I should go back original or go with headers and dual exhaust. I'm open to all suggestions. Thanks

I've got a '97 Z71. Exhaust broke at the connection to the exhaust manifold. Dealer wants $750 for new TWC. I'm trying to decide if I should go back original or go with headers and dual exhaust. I'm open to all suggestions. Thanks

Headers and dual exhaust all the way! You can get a nice set of mid-length or long tube headers for your Z, as well as two nice mufflers for that price. No way would I pay them that much for a stock setup! Hey, think of it this way, it's a good excuse to upgrade! :evillol:

I've got a '97 Z71. Exhaust broke at the connection to the exhaust manifold. Dealer wants $750 for new TWC. I'm trying to decide if I should go back original or go with headers and dual exhaust. I'm open to all suggestions. ThanksThanks for the quick reply. Do you have any suggestions. Manufacturer of headers, exhaust and mufflers. If you were me what would you buy and where? :banghead:

I have straight pipes. That is as true dual as it gets. I have a 2500LD 6.0L Vortec V8. One pipe for each header, no muffler, and a cat. converter. It sounds awesome. Loud as heck, but only if you get on it.I'm looking to do something like that to my '97 z71. Can you give me some more info on your system. Maunfacturer and where you bought it. Online?
:banghead:

Thanks for the quick reply. Do you have any suggestions. Manufacturer of headers, exhaust and mufflers. If you were me what would you buy and where? :banghead:

Go to summitracing.com and check out the Thorley headers. They are long tube and nice quality, as well as extremely affordable. I love mine. I would also look into some magnaflow single in/out mufflers. They flow the best of any muffler you will find. If you cut the cats, you're going to need a set of 02 simulators in place of the rear 02s, or your computer will give you fits.

I have straight pipes. That is as true dual as it gets. I have a 2500LD 6.0L Vortec V8. One pipe for each header, no muffler, and a cat. converter. It sounds awesome. Loud as heck, but only if you get on it.

You didn't have trouble with the loss of backpressure? When I open my cutouts, I seem to lose a good bit of lowend torque, but gain in the higher rpms.

you guys seem insistent on long tube headers for performance but arent shorty headers the only headers that will bolt directly in place of the stock ex manifolds? wouldnt long tubes require reworking the section that the cats are on?

you guys seem insistent on long tube headers for performance but arent shorty headers the only headers that will bolt directly in place of the stock ex manifolds? wouldnt long tubes require reworking the section that the cats are on?

Yes, the shorties are the only ones that will bolt right up, but when you do a side by side comparison, the stock manifolds are just about as good as the shorties. So, if you're going to spend the money on headers, you'll also have to spend alittle money at the exhaust shop setting everything up a little. Definately worth the money to do the long tubes over the shorties, then setting the exhaust up for them.