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FUELATV Aug 14 2007, 03:05 PM Post #1


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I have photos of every pipe in the shootout mounted up on the bike, but this website is not letting me post that many photos. I will also have all the dyno sheets posted soon. I just need to scan them all and upload them.

I want to make a few statements here. First off do not get all caught up in the peak HP number. All dynos read different. This is why we have a base line run to see the gains made with each pipe. The dyno used is a dyno jet dyno. All of the pipes were tuned for max HP. Some pipes liked 13-1 a/f and some liked 13.8-1.

1. WILL THE AFTER MARKET EXHAUST PIPES MAKE MORE HP THEN THE STOCK EXAUST WITH THE BAFFLE PULLED OUT?
A. YES ..... All of the pipes tested ..... SO FAR.... did make more HP then the stock exhaust with the baffle pulled out. Most of the aftermarket pipes tested were VERY close. Some made a little more then others.

2. DB'S ...... All of the db testing was done at 3750 RPM. The spark arrestors were removed on the aftermarket exhausts for this test.

3. All dyno runs were done with 91 octane pump gas.

The dyno sheets will be listed below. We will show each pipe run layed up aginst the stock pipe with the baffle pulled. Then you can see how much better each pipe does over the stock set up.


Stock pipe - Baffle out, air box lid off and a Power commander
Peak HP - 40.96
Max Torque - 30.15


Pro Circuit pipe -
Peak HP - 44.61
Max Torque - 31.52
104db at 3750 RPM
The Pro Circuit pipe has mounts for the stock head pipe heat shield, but it does not have mounts for the stock mid pipe heat shield. The Pro Circuit's can is riveted together making repacking alittle more time consuming.

Baldwin Racing pipe-
Peak HP - 44.93
Max Torque - 32.18
102db at 3750 RPM
This is a REALLY nice piece. Baldwin went the extra mile incorperating alot of nice features into their pipe. The pipe has machined fittings for the canister and mid pipe making intalling it and removing it very easy. The Baldwin pipe also has a Billet canister mount, Thick head pipe flange, both the head pipe and mid pipe stock heat shields will bolt on. To top it off the end cap unbolts for easy canister repacking.

Trinity Racing pipe -
Peak HP - 45.16
Max Torque - 33.05
106db at 3750
The Trinity pipe is a multi step pipe. It has a mount for the head pipe heat shield, comes ceramic coated, and uses a trick billet clamp to hold on the canister. The pipe's end cap does unbolt for easy canister repacking.

LRD pipe - Anniversary Edition Exhaust .......OPTIONAL 1.9 end cap sleeve installed
Peak HP - 45.26
Max Torque - 33.35
102db at 3750
This exhaust features a modular billet rear end-cap design that utilizes sleeves to tune performance and sound. The Anniversary Edition pipe comes with a 1.25 inch end cap sleeve. You can buy the .875 inch sleeve or the 1.9 inch sleeve at $29.95 each from LRD. These other sleeves DO NOT COME WITH THE PIPE. This LRD pipe has a HUGE canister diameter. The LRD pipe does have mounts for the stock head pipe heat shield, but no mounts for the mid pipe heat shield. This pipe does have a billet header flange, but it is not as thick as some of the others . The pipe's end cap does unbolt for easy canister repacking.

LRD pipe - Anniversary Edition Exhaust ....... 1.25 end cap sleeve comes with this pipe
No dyno numbers with this endcap, but expect a BIG HP loss
100db at 3750

LRD pipe - Anniversary Edition Exhaust ....... OPTIONAL .875 end cap sleeve installed
No dyno numbers with this endcap, but expect a BIG HP loss
97db at 3750

Motoworks pipe -
Peak HP - 45.46
Max Torque - 33.05
102db at 3750
This pipe does have a billet header flange, but it is not as thick as some of the others. The head pipe does not have any steps and the diameter is about the same as the stock head pipe. Once it goes alittle ways into the mid pipe it does have a small step. The Motoworks pipe does have a riveted canister this will make repacking the canister alittle more time consuming.

Dasa pipe - 16 inch standard version
Peak HP - 45.6
Max Torque - 33.25
103db at 3750 RPM
The Dasa pipe is a multi stepped pipe. All Dasa pipes are hand made here in the USA and the quality really shows with perfect tig welds. The Dasa pipe does not have any heat shield mounts. It does have alot of nice features including TRICK billet end caps, a billet canister mount and a THICK head pipe flange. The Dasa pipe's end cap does unbolt for easy canister repacking.

Sparks Racing pipe - BIG CORE version
Peak HP - 45.72
Max Torque - 32.62
107 at 3750 RPM
The sparks pipe does not have any mounts for a heat shield. Sparks did make the end cap unbolt for easy canister repacking.

HMF pipe -
Peak HP - 45.72
Max Torque - 32.80
105db at 3750 RPM
The HMF pipe is a multi spepped pipe. It does have a riveted canister this will make repacking the canister alittle more time consuming. This pipe does not have any heat shield mounts.

Yoshimua pipe - full stainless steel version
Peak HP - 45.76
Max Torque - 33.55
102db at 3750
The Yoshi pipe features a billet canister mounting bracket and mounts for both mid pipe and head pipe heat shields. The also comes with a custom yoshi head pipe heat shield. The pipe does not have any steps untill right befor the canister. The Yoshi pipe does have a riveted canister this will make repacking the canister alittle more time consuming.

ESR pipe -
Peak HP - 46.15
Max Torque - 32.48
106db at 3750 RPM
The ESR pipe is a multi stepped head pipe that comes ceramic coated and includes a very cool clamping billet canister mount. It does not have any heat shield mounts. This pipe's end cap does unbolt for easy canister repacking.

Dasa pipe - 13 inch CUSTOM FUELATV version 106db at 3750 RPM
Peak HP - 46.3
Max Torque - 33.25
All Dasa pipes are hand made here in the USA and the quality really shows with perfect tig welds. The Dasa pipe does not have any heat shield mounts. It does have alot of nice features including TRICK billet end caps, a billet canister mount and a THICK head pipe flange. The Dasa pipe's end cap does unbolt for easy canister repacking.
(IMG:http://i35.photobucket.com/albums/d169/FUELATV2005/KFX450PIPES012.jpg)
(IMG:http://i35.photobucket.com/albums/d169/FUELATV2005/KFX450PIPES011.jpg)
 

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Sorry i guess i should have posted that here too. I will post up photos of all the pipes installed this weekend.
 

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what is the db level of the stock with spark arrestor out? what about the HMF quiet core series any test? would like something little less noisy but decent gains, if can be.
 

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Discussion Starter #5
QUOTE (JASON 77 @ Sep 2 2007, 11:47 AM) index.php?act=findpost&pid=3186
what is the db level of the stock with spark arrestor out? what about the HMF quiet core series any test? would like something little less noisy but decent gains, if can be.
i got the motoworks pipe from fuelatv and @ 102 db it is very reasonable noise volume, good compromise between sound levels and performance
 

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I am working on becoming a site sponsor to share more of the info i have. once that is wrapped up i will post the graphs, more photos and updated info.

Thanks
 

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Discussion Starter #9
QUOTE (Kuhl_Kid @ Oct 19 2007, 04:08 PM) index.php?act=findpost&pid=3888
Anyone have any info on the Slip on version of the Yoshimura pipe
dont waste time with the slip on, most of the manufactures that make the slip on pipe can not add the header later, you have to buy a whole new pipe!
 

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Well if slip on's are basically worthless then which full system is the best for the money? I do a lot of trail riding along with motocross so I do not want to lose my low end.
 

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QUOTE (topdollr @ Oct 20 2007, 08:44 AM) index.php?act=findpost&pid=3901
dont be fooled, the stock head pipe is a nice one so a slip on would be worth considering
+1 on that !

I have a full system ESR and the one thing that I do not like about it is:
the head pipe is stainless not titanium and MUCH heavier. Past that NO
complaints what-so-ever. I will post some pics and dyno numbers as
soon as I get back from this trip. Also, I tried to put up a map and found
out I was/am electronically challenged. More will be revealed !

LTGTR

Andy
 

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What about Big Gun any good? I have a sponcership threw them but if they arn't good then I'll have to go with someone else. Maybe Dasa standard>
 

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Discussion Starter #15

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Ahhhh, the dyno. The myth, the legend. For years, companies have hyped their dyno charts to sell their products. Those beautiful arching colored lines that illustrate horsepower and torque just look so cool and scientific. How can you possibly dispute them? But like most things in life, there’s more that you need to know before you can make an informed decision. Years ago, dyno charts were considered “gospel” by some, but with the flow of information available on the internet, today’s consumers are more educated than ever. Don’t believe it? Do a simple Google search for “Dyno Myths” and you’ll find over 10,000 articles dissecting these issues.

Let’s be real, we live in a world of measures. And why not? Measurements are a great way of comparing the differences between things. Seems funny, but the fact is, we’ve grown accustomed to numbers telling us everything. In this age of 72oz Quick-E-Mart sodas, we tend to think bigger is better.

And for years, consumers would base their exhaust purchase from these measurements. In the past, magazines that relied on a dyno test to pick the winner of “Pipe Shootouts” reinforced the legitimacy of these dyno claims. But as consumers have become more smarter, most magazines now make dyno charts a very small part of any shootout, with “rideability” and lap times playing a larger role.Dynamometers are the machines used to produce those seductive dyno charts. Computers map and plot data to return results that you can comprehend into a grid-like format called the dyno chart. DMC uses this comparative data to measure performance changes (among other things) during the development of exhaust systems. On face value, this is really sorta cool, so why shouldn’t you buy brand X, if it’s dyno chart shows 2 horsepower more than brand Y’s dyno chart???

There are many variables in dyno analysis but the first being the individual performing the test. For every unique dyno machine, there’s an equally unique operator running it. If you have 10 different dynamometers and 10 different operators, and everyone performed dyno tests on the same bike, you would likely have 100 different results. This means that the same bike could show a 1-5% variance, even after SAE corrections for ambient temperature, barometric pressure differential, altitude, humidity temperature, etc. This assumes that there aren’t any… well let’s just call them “optimistic” dyno operators in the bunch.

Most dyno charts flaunt their “peak” performance gain. Do you really buy a pipe because once each lap, or once a weekend, you can use that peak horsepower on that long straightaway? What about the other 98% of your riding time? DMC Afterburners are specifically designed to outperform other exhaust systems on every level with a critical focus on delivering maximum overall horsepower. We don’t pay much attention to claims of “peak” horsepower or torque gains, neither should you. Peak horsepower is insignificant, how the pipe performs through the whole powerband is everything

Got this info off a web site. Hope this helps in someones decision in buying a pipe!!
 

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QUOTE (On_All_4s @ Oct 20 2007, 09:34 AM) index.php?act=findpost&pid=3902
+1 on that !

I have a full system ESR and the one thing that I do not like about it is:
the head pipe is stainless not titanium and MUCH heavier. Past that NO
complaints what-so-ever. I will post some pics and dyno numbers as
soon as I get back from this trip. Also, I tried to put up a map and found
out I was/am electronically challenged. More will be revealed !

LTGTR

Andy
Another +1. Most of the aftermarket header/mid pipes you get with the exhaust kits are stainless, and basically the same diameter as the stock header/mid pipe... Titanium>stainless. It's not like the stock pipes are full of weird bends or anything, and they come with both heat shields already on 'em. I've been saying this for a while, but everybody seems to be so gung-ho about replacing EVERYTHING... I saw a guy TAKE OFF the Renthal Fatbars and put something else on... Why the hell would you want to remove some of the best bars out there, and replace them with something comparable at best? Just to list it in his signature run-down I suppose...

If the stock parts are as good or better than the aftermarket parts, don't mess with it.
 
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