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Race only exhaust set up, would this work?

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Old 10-28-2006, 10:47 AM
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Default Race only exhaust set up, would this work?

What if you just add 12-18" tubing and a bullet muffler off the header? No x pipe, h pipe or y pipe? I understand that you don't want to go open header because you could burn out the O2s.

This would be a track only setup - and the drive to the track I guess... I know it would be loud, but would I pick up significantly more hp than my current set up? Current set up is dynatech supermaxx and y pipe with Borla. Supposedly I'm losing 15-20 hp because of the 2.5" y pipe... And I'm only dynoing 410 rwhp which seems to support that. My only motivation to do this would be to pick up that hp for the track.

Whaddaya think?
Old 10-28-2006, 12:21 PM
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Hmm...I don't know, but I have wondered the same thing.

I am sure you will get people in here telling you that will lose the "scavenging affect", but I am not educated enough on that to comment.
Old 10-28-2006, 05:33 PM
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ttt...
Old 10-28-2006, 05:41 PM
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this has been talked about many times. straight pipe off the header will make you lose power. an x-pipe, h-pipe and y-pipe will net you more power because you will take advantage of scavenging. scavenging increases exhaust velocity and increases power. going straight pipe off the headers will simply mean you can't take advantage of the scavenging effect. your best bet is to run an x-pipe or h-pipe off the headers and call it a day.
Old 10-28-2006, 05:55 PM
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your not going to lose as much on the top end as you would down low
Old 10-28-2006, 06:42 PM
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agreed!
x and h pipes help with low end power.
Old 10-28-2006, 07:05 PM
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I ran Bullets with like 10" of pipe off the collectors then the bullets. IMO It sounded like ***!. really choppy at idle and it was just retarded loud I mean uncomfortable. I mean seriously I work for the railroad and I can stand listening to the whistles blow inside the cab on shitty power but this takes the cake. Its way to loud and sounds like ***. I'd just throw a y pipe on and a bullet off the ypipe thats what I did and it sounds great!
Old 10-28-2006, 10:33 PM
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I had Edelbrock LTs with 3.5" collectors, Hooker 3.5-3" reducers, Flo-Pro Twister mufflers, then turndowns. Never saw a loss of horsepower compared to the duals I used to have with a X pipe. I ran 10.85 cam only. Here is a video clip of the car:

Click Here
Old 10-29-2006, 12:33 AM
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I am running bullets off of the headers and turndowns. Its loud but for just a race exhaust its not bad. You wont loose much down low if your car is built w/ a high stall or launch at a decent rpm.
Old 10-29-2006, 01:21 AM
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true duals with an X pipe > all other exhaust

as for your 02s, have them all deleted, yes, i said all
Old 10-29-2006, 02:26 AM
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Old 10-29-2006, 07:24 AM
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Heah if it is anything to ya, I am running PaceSetter LT's, No Cats, X pipe, and Flow Master Bullets dumped before the axle. it's quiet enough to drive, and loud enough over 3k that you cannot talk on the cell phone or to the person next to you with yelling.

I love my set up....I dont have a cam or intake yet, but that is coming soon.....It's you car man....Do what ya want with it....
Old 10-29-2006, 08:48 AM
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Originally Posted by Cop Car
true duals with an X pipe > all other exhaust
And you are saying that why?
Old 10-29-2006, 11:50 AM
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Originally Posted by ChocoTaco369
this has been talked about many times. straight pipe off the header will make you lose power. an x-pipe, h-pipe and y-pipe will net you more power because you will take advantage of scavenging. scavenging increases exhaust velocity and increases power. going straight pipe off the headers will simply mean you can't take advantage of the scavenging effect. your best bet is to run an x-pipe or h-pipe off the headers and call it a day.
X PIPE CREW TO THE RESCUE, YEAH.

I run a bullet off of each collector, and at the track i run a piece of pipe off each collector.

I bet you i wouldn't gain a damn thing going to an xpipe. The added weight would slow me down actually.

I lost NO low end torque going to this setup. I actually stepped up to kooks 1 7/8 -2inch headers and the bullet exhaust system at the same time. I gained TONS of low end, it felt like a monster. The sound is great.. don't know what else to tell you guys. Some of you are too caught up in the hype to try something new that works. Most f-body racecars run the bullet setup and it works great for them. Works great for me, might work great for you.
Old 10-29-2006, 11:56 AM
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Originally Posted by SiL3NtXWS6
X PIPE CREW TO THE RESCUE, YEAH.

I run a bullet off of each collector, and at the track i run a piece of pipe off each collector.

I bet you i wouldn't gain a damn thing going to an xpipe. The added weight would slow me down actually.

I lost NO low end torque going to this setup. I actually stepped up to kooks 1 7/8 -2inch headers and the bullet exhaust system at the same time. I gained TONS of low end, it felt like a monster. The sound is great.. don't know what else to tell you guys. Some of you are too caught up in the hype to try something new that works. Most f-body racecars run the bullet setup and it works great for them. Works great for me, might work great for you.
if you're running 9's, you can probably get away with it as the added backpressure would probably hurt you. what you have is a very unfair comparison. for the normal board members - the guys running 12's and 13's - they're better off with a type of midpipe that scavenges.
Old 10-29-2006, 11:59 AM
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There are plenty of 11/12 second cars running the same setup off the headers.

Sux2bu is an example.
Old 10-29-2006, 12:06 PM
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Originally Posted by Cop Car
true duals with an X pipe > all other exhaust

as for your 02s, have them all deleted, yes, i said all
I can't argue that true dual with an X is a good setup, as there are good and bad examples of each. However, I can't think of a good reason to delete all the O2 sensors. Care to explain that one?
Old 10-29-2006, 12:49 PM
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Originally Posted by SiL3NtXWS6
There are plenty of 11/12 second cars running the same setup off the headers.

Sux2bu is an example.
Mine is a good example of a bullet off the headers. 10.85 @ 126, cam only.
Old 10-29-2006, 01:45 PM
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OK, so I'm running boarderline 11s - should be 11s next trip with good weather - and I run a reverse split cam which apparently needs the least restriction possible.

For race only, launching at 3,500+ rpms, will the bullet muffler off each collector gain or lose ET for me? I'm not opposed to the x-pipe, but I'd like to explore this option first.
Old 10-29-2006, 01:47 PM
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Originally Posted by Matt D
Mine is a good example of a bullet off the headers. 10.85 @ 126, cam only.
What kind of cam and what type of mufflers did you run? Did you have any pipe between the header and muffler?



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