are bullet mufflers enough to create backpressure?
Put it this way, if backpressure was good there would be no aftermarket exhausts. X pipes will always edge out H pipes slightly powerwise. A Y pipe with a good merge and a cutout will make good power, but duals will have the midrange over a y anyday
correct.
The proper exhaust is the one that offers the best blend of back pressure and flow for your specific motor. If you have a mild ls1 you will make more power (specially Torque) with a 3" exhaust then a 4". If the OP's car is bolt on/mild ls1 he might lose a few Hp up top but gain more torque in the lower rpm's. Going from bullet's to a chambered muffler. Hooker makes some good chambered mufflers and sound good too!
The proper exhaust is the one that offers the best blend of back pressure and flow for your specific motor. If you have a mild ls1 you will make more power (specially Torque) with a 3" exhaust then a 4". If the OP's car is bolt on/mild ls1 he might lose a few Hp up top but gain more torque in the lower rpm's. Going from bullet's to a chambered muffler. Hooker makes some good chambered mufflers and sound good too!
OP disregard this guys post.
i appreciate all this input guys... in my humble opinion it feels like my exhaust is holding me back... it feels like the car has a delay when the gas is floored. the car is tuned and makes great power but just one of those things i feel.. i maybe wrong. i just threw sum cbombs on there with 2.5 inch true dual piping from the ltubes back.. it was just something i did in a hurry. i feel like theres something better i can do
I added a cutout to my stock exhaust and man I felt a difference in the way it responded. I wanted True duals badly, so I went straight pipe with chamber 1s and felt as if the car wasnt responding like I wanted it to. so I then added at H crossover pipe with muffler delete and Im very happy right now, but I know that If I want it the right way, Im going to have to get me some LTs, X pipe, and throw in my Dynomax Bullets.
What system do you think would work for him? A 4" exhaust or a 3"? The 4" will obviously create less back pressure. What mufflers would you recommend?
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Verdad Gallardo Last edited by fspeedster; Feb 13, 2011 at 05:14 AM.
Your exhaust is produed in pulses as cylinders fire. If you have headers this is where collector size and length come into play. As the gases exit the different primaries into the collector it also creates a spiral effect that help creates pull the gases out (this is negated by the use of cats which dont allow for the spiraling effect. X-pipes help by equalizing pulses and pressure in both exhaust banks in a true dual setup.
I just ditched my chambered muflers and have straight 3' pipe from the collectors to 3' bullet mufflers and an x-pipe for almost 0 backpressure. I picked up over 2/10s and over 2mph at the track.
I just ditched my chambered muflers and have straight 3' pipe from the collectors to 3' bullet mufflers and an x-pipe for almost 0 backpressure. I picked up over 2/10s and over 2mph at the track.
Btw, Cerry Bombs are louvered inside which are terrible for flow and suck more than some chambered mufflers. They actually will create backpressure. You want bullet mufflers with a perforated center (little holes) which flow almost as good as straight pipe. Technically any muffler, even bullets, create flow resistance (backpressure) or else they wouldnt muffle, theyd be straight pipe. Lol. The perforated core allows for a minimal amount of gases and sound waves to be caught in the packing material. What matters is at WOT and thats when they flow the best.
Your exhaust is produed in pulses as cylinders fire. If you have headers this is where collector size and length come into play. As the gases exit the different primaries into the collector it also creates a spiral effect that help creates pull the gases out (this is negated by the use of cats which dont allow for the spiraling effect. X-pipes help by equalizing pulses and pressure in both exhaust banks in a true dual setup.
I just ditched my chambered muflers and have straight 3' pipe from the collectors to 3' bullet mufflers and an x-pipe for almost 0 backpressure. I picked up over 2/10s and over 2mph at the track.
I just ditched my chambered muflers and have straight 3' pipe from the collectors to 3' bullet mufflers and an x-pipe for almost 0 backpressure. I picked up over 2/10s and over 2mph at the track.
Read up smart guy, you can't just throw on the biggest, highest flowing exhaust, it has to match your engine specs.....http://www.summitracing.com/parts/BOR-40941/
Your exhaust is produed in pulses as cylinders fire. If you have headers this is where collector size and length come into play. As the gases exit the different primaries into the collector it also creates a spiral effect that help creates pull the gases out (this is negated by the use of cats which dont allow for the spiraling effect. X-pipes help by equalizing pulses and pressure in both exhaust banks in a true dual setup.
I just ditched my chambered muflers and have straight 3' pipe from the collectors to 3' bullet mufflers and an x-pipe for almost 0 backpressure. I picked up over 2/10s and over 2mph at the track.
I just ditched my chambered muflers and have straight 3' pipe from the collectors to 3' bullet mufflers and an x-pipe for almost 0 backpressure. I picked up over 2/10s and over 2mph at the track.
Btw, Cerry Bombs are louvered inside which are terrible for flow and suck more than some chambered mufflers. They actually will create backpressure. You want bullet mufflers with a perforated center (little holes) which flow almost as good as straight pipe. Technically any muffler, even bullets, create flow resistance (backpressure) or else they wouldnt muffle, theyd be straight pipe. Lol. The perforated core allows for a minimal amount of gases and sound waves to be caught in the packing material. What matters is at WOT and thats when they flow the best.
OP it might be the size of your cam and stall/gears that leaves you feeling like you dont have much down low. Adding an underdrive pulley and removing some weight should help with that.
Teching In
Joined: Feb 2008
Posts: 12
Likes: 1
http://kalecoauto.com/index.php?main...&products_id=3. Good to go. Grab some cross drilled brake lines. But in all seriousness nate and most other in here are right.
Teching In
Joined: Feb 2008
Posts: 12
Likes: 1
Now thats ****** hilarious! Good one
Its hard to get under the car but I'll try tomorrow. I did do one thing backwards due to space constraints, I put the bullets (I got the 24" long ones) before the x-pipe. My bullets are right after the header, then extend to a x-pipe, followed by a foot of pipe and then turndowns. The bullets being so close might not allow the exhaust to pulsate as smoothly as straight pipe which means the x-pipe is now more for sound tuning though it still does help with balancing the two banks. I put this setup to fit in a tight tunnel and more importantly to flow max amount of exhaust at WOT so exhaust scavenging at low rpms isnt priority. Even then it way out flows my old setup and I feel more hp/trq all throughtout the powerband...which translated to the track where it counts.