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Dumped mufflers at rear, wow!

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Old 04-16-2012, 09:45 PM
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Default Dumped mufflers at rear, wow!

So after I got my cam and tune done, numbers not what I was hopping. Tuner said my home made exhaust was killing me. So I decided to try something, I cut the back section off, put my 1 chambers at the reared! It's not the best looking setup, they just don't belong there. BUT... WOW, I am not kidding it's a hole new car! I was pitting out 432hp 424tq and he said I should be around 450.... Well I bet it is now! I can't believe how much faster the car is, it picked up power everywhere, low end and top end! The sound is crazy freaking loud when I punch it now but still decent at a cruise.
Old 04-21-2012, 02:42 AM
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That sounds nice..any pic?
Old 04-21-2012, 03:44 AM
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Dumps are good. Saves a lot of weight, too. I've got classic chambered 26" chambered pipes after the X and dumped right at the pumpkin.
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Old 04-21-2012, 09:08 PM
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Factory mufflers are a restriction after bolt-ons and cam? Any research on this?
Old 04-22-2012, 11:32 AM
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Originally Posted by glennster
Factory mufflers are a restriction after bolt-ons and cam? Any research on this?
Its just common sense. The stock mufflers have baffles and packing to dampen the noise, that stuff restricts the flow. The exhaust itself is very good, 2.5 inch duals all the way back with an H-pipe. From what I understand people are picking up the same power with an axle back kit(mufflers with enough pipe to connect to the stock system) as they are with a full after market catback exhaust. I think it would only be necessary to upgrade to headers and highflow cats to see large gains and an upgrade to larger diameter piping would probably only be needed with FI or stroker applications.
Old 04-22-2012, 08:59 PM
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Originally Posted by Gunslinger09
Its just common sense. The stock mufflers have baffles and packing to dampen the noise, that stuff restricts the flow. The exhaust itself is very good, 2.5 inch duals all the way back with an H-pipe. From what I understand people are picking up the same power with an axle back kit(mufflers with enough pipe to connect to the stock system) as they are with a full after market catback exhaust. I think it would only be necessary to upgrade to headers and highflow cats to see large gains and an upgrade to larger diameter piping would probably only be needed with FI or stroker applications.
It might make sense and I agree but these cars have been around a while and I have not seen any track or dyno proof.
Old 04-23-2012, 07:48 AM
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Originally Posted by glennster
Factory mufflers are a restriction after bolt-ons and cam? Any research on this?
There's tons of research on this fact.....including minimal gains with cut outs.

If the OP gained 20 RWHP from this mod I'll blow him in front of god & country.

By the way...I saw the car run 12.9 @ 114 yesterday.

Your trap is right in line with your tuners dyno #s.

PS = I made 470 rwhp in my cammed 10' SS with Kooks LTs & hi flow cats and a SLP LMII Axle back.
Old 04-23-2012, 10:34 AM
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My car ran 12.8@113.3 on saturday. I had 3 runs with a 1 bog, 1 spin and a 1 wheel hop. Could not drive........but beat a 5.0 on the first 2 runs so I feel better.
Old 04-23-2012, 02:33 PM
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I wish I coulda met up with your guys at GLD yesterday.

I'm planning to go tomorrow night m'self.
Old 04-23-2012, 02:36 PM
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I'm ready to cut off the stock mufflers and I've got 3" bullets to put in their place. Should sound good and drop some weight
Old 04-24-2012, 11:33 PM
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I'll be doing the same only with bullets dumped at the axle.

I already pm'ed mpd-1 on C5 and they will fab me up a smooth rear valance with no exhaust outlets so it doesnt look so goofy without tips.
Old 04-25-2012, 08:42 AM
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Ill take a vid soon guys, I blocked my holes with plexy glass... turned out great and sounds awesome!
Old 04-25-2012, 08:45 AM
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Originally Posted by Huggerorange73
There's tons of research on this fact.....including minimal gains with cut outs.

If the OP gained 20 RWHP from this mod I'll blow him in front of god & country.

By the way...I saw the car run 12.9 @ 114 yesterday.

Your trap is right in line with your tuners dyno #s.

PS = I made 470 rwhp in my cammed 10' SS with Kooks LTs & hi flow cats and a SLP LMII Axle back.
Ya I was having traction problem all day first time with the cam, and also ran 3 12.7s with a best of 12.72 and 114.7-9 MPH on a 2.2-3 60ft.... Ill line up with your vette any day of week bud. Ill have 12.3s @ 115-116 on street tires before the end of the year!
Old 04-25-2012, 09:25 AM
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Originally Posted by sweetC5
Ya I was having traction problem all day first time with the cam, and also ran 3 12.7s with a best of 12.72 and 114.7-9 MPH on a 2.2-3 60ft.... Ill line up with your vette any day of week bud. Ill have 12.3s @ 115-116 on street tires before the end of the year!
Money talks, bullshit walks......let me know when you're all sorted out, and what track you want to run. Bring cash.
Old 04-25-2012, 09:31 AM
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Originally Posted by Huggerorange73
Money talks, bullshit walks......let me know when you're all sorted out, and what track you want to run. Bring cash.
Were havin' fun now!
Old 04-25-2012, 09:55 AM
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OMG, this comming from the guy that couldnt even drive his own car for the life of him! Broke his **** and sold his camaro because it was it was total fail... kiss my *** dude, first off I dont have cash to bet or blow with a kid on the way... never called you out... you started this ****, and I dont even need to sort my junk out because I already have you beat. I seen your driving and was nothing impressive, dont worry you will get the call next time I head out. Now you can get the credit card out like a bitch and make sure you buy up some parts because they way it sits you better bring more then a 12.8!
Old 04-25-2012, 10:40 AM
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It's getting deep in here. Mabey we need a 5th Gen **** taking section added to the board.
Old 04-25-2012, 11:11 AM
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Originally Posted by speedtigger
Were havin' fun now!
The fun is just starting.....wait.

Originally Posted by sweetC5
OMG, this comming from the guy that couldnt even drive his own car for the life of him! Broke his **** and sold his camaro because it was it was total fail... kiss my *** dude, first off I dont have cash to bet or blow with a kid on the way... never called you out... you started this ****, and I dont even need to sort my junk out because I already have you beat. I seen your driving and was nothing impressive, dont worry you will get the call next time I head out. Now you can get the credit card out like a bitch and make sure you buy up some parts because they way it sits you better bring more then a 12.8!
Hmmmm, I couldn't drive my own car huh? First off, wash the salt out of your vagina. Secondly, stop sucking Chicago 5th Gens dicks and learn the facts. I let Dan drive the car the first few passes, and the shitbox broke. Before I could get to the track, the motor blew. I'm pretty sure I can drive hoss....bring your money.

You already have me beat? ****, I hope so....you've got a cammed LS3 vs a 98 LS1 with a set of headers and a tune. What did you run? 12.7? I ran 12.8....YOU'RE AWESOME! Let me slap a cam in my Vette and we'll go mod for mod. Just let me know when you're ready.....I won't take your money if you can't afford it, I'll settle for taking your pride.

Originally Posted by Gunslinger09
It's getting deep in here. Mabey we need a 5th Gen **** taking section added to the board.
Old 04-25-2012, 11:55 AM
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I have been told by a few people you cant drive for ****, looks to be true. And I would say were pretty even, my cammed LS3 on stock tires and your on DR's pretty much even things out the track... Like I said, Ill let you know next time I go, I want to see this big talk in action. Had to buy vette cuz you couldnt cut it and gave up! 470 at the wheels and never an 11 sec pass, thats pretty ******* sad... shows how good you! Dan had to drive your **** just so you post a decent time Dan got a black vette and so did you... sounds like you should get off his nuts and be your own man.
Old 04-25-2012, 11:56 AM
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O ya... 12.7 is faster then 12.8!


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