| Author | Message | ||
     Brumbear |
So I was wondering if this is a stock exhaust  what it would sound like if I did something like this  | ||
| Xbswede |
Yup looks like a stocker. Here is a sound clip of Chamber A and C removed and leaving B intact. | ||
| Gunut75 |
NOW IT WORKS. Geek box was slow, so I restarted it, and it works now. John, did you do any remapping? What about airbox mods? Thanx! | ||
| Glitch |
$185 it knocks the drummer out of the water. At least the Drummer has been tested not to make your bike run lean. The Drummer was built to have the optimum air fuel ratio. The Hawk pipe has been tested for sound, no dyno time, no air fuel data. But I guess if you're willing to pay your hard earned money on a cheap pipe, you may be ok, then again, you may just get a loud exhaust and burnt valves. Pay your money and take your chances I guess | ||
| Xl_cheese |
At least the Drummer has been tested not to make your bike run lean. The Drummer was built to have the optimum air fuel ratio. The Hawk pipe has been tested for sound, no dyno time, no air fuel data. But I guess if you're willing to pay your hard earned money on a cheap pipe, you may be ok, then again, you may just get a loud exhaust and burnt valves. Pay your money and take your chances I guess hahah. No exhaust will make your bike run lean. The ecm learns via input from the 02 sensor. If the bike is running lean then the AFV value will go up making the mix richer. Our bikes are made to run at 14.7:1 in the Closed loop region. The ecm will always keep the bike running there in closed loop via the ego corr. Open loop the ecm applies the "learned" AFV multiplier as well as the open loop enrichment of 105%. Ego corr is calculated real time via input from the o2. AFV is adjusted over time from an average of Ego Corr. | ||
| Glitch |
No exhaust will make your bike run lean.    Like I said, pay your money, take your chance. I'll go with tested and proven products. | ||
| Blacklightning |
When our bikes learn, the whole map is changed by percentage. If a new exhaust / filter / breather mod changes flow in a particular area of the map besides closed loop learning (2000-3000 rpm minimal load and throttle input, the afv adjustment can put that area in a rich or lean condition. | ||
| Glitch |
I don't mean to sound harsh, I just hate to see things like the engine above, especially when it's preventable. | ||
| Smokescreen |
To be fair Glitch, that bike didn't have a cheapo exhaust on it either. Isn't that pics of Travis' bike? Smokescreen PS: You gotta come out to the house sometime!  | ||
| Smokescreen |
Also, XBullet's XB9SX with a Micron was showing signs of burning the valves with less than 5K on the engine. Gooch had the head off and his piston was starting to cook just like the one pictured above. That even included the map from Al. As the saying goes: "Your results may vary"  | ||
| Od54 |
I'm going to have to agree with the "your results may vary". It's only proven when it's still working on your bike, car, truck, donkey, whatever. | ||
| Iamarchangel |
Lean doesn't melt over time. Lean melts right now. If your bike can sustain a very hot engine below the melt point, you're good. Looking lean, being lean and fatal lean are different degrees of the same condition. Personally, I like it when a builder adds a bit of research to their product. No idea on Hawk's quality but I didn't like the sound. It's not like the Magnaflow or the Xopti pipe. Hawk has a flat drone that would bother me pretty quickly. (None of them are going to be studio recording so the comparison is valid.) | ||
| Hexangler |
...Xopti pipe... Any info on this? | ||
| Iamarchangel |
Unfortunately, he decided not to produce these, but I believe Voodoo picked up some of the designs. | ||
| Hexangler |
Xopti pipe looks like a worked (gutted) stocker. | ||
| Paint_shaker |
Drummers, Spec OPs, Xopti and Voodoo pipes are all based on stock pipes. | ||
| Iamarchangel |
Xopti pipe looks like a worked (gutted) stocker. You say that like that's a bad thing. There's a thread somewhere that details what he did. I think he removed an inner pipe and installed a washer. Point is, he's done some research and either him or Voodoo have some data on the mods. (and, personal taste, I prefer the sound of this one.) (Message edited by Iamarchangel on April 10, 2009) | ||
| Brumbear |
The pic I put on there is with the lower center tube and the left upper tube so the valve is still hooked up and working so maybe it won't run lean hey if anyone has a spare can I will make one and test it on my bike can't hurt to try it | ||
| Big_b |
The pic you posted looks like a straight pipe until the valve is open | ||
| Brumbear |
yeah your right I might have to baffle it a bit for back pressue | ||
| Xoptimizedrsx |
you need a baffle plate. yes i did not build many and wont build any more. it gutted totally with two baffels and two catches with a 3 inch tube inside the pipe as the outlet is full open no little tube inside it. first baffle is 3 inches at from the collector and the other is 6 inches from the rear both cover 3/4 of the pipe. thats the basics. the voodoo free post on how to do your own pipe is a good pie also if you do your own mods. if not buy with confidence a drummer or any pipe. i think the damage was not a pipe the color is not there for over lean that a high rev damage all day sorry the color has that. i see it in valves often or a engine built to tight specs.. it will bend break and warps. the top snaps off and it beats the crap out of it.high rev, wrong valves. wrong springs for the lift, many things. been there done that. mike | ||
| Brumbear |
I just want to see if I can make it I will do mine over next season if I can't find an old can. I would actually recomend someone buy a proven product I jusy love to tinker with stuff and since its my own why not | ||
| Hammer71 |
what it would sound like if I did something like this It will explode. Then you will have to MacGuyver it. Alriyght. |
