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maxhfz

Akrapovic Ti and Dobeck EJK 3.5 (Baffle out)

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maxhfz
Hello all!
 
About to purchase my self the Dobeck EJK for the Akra. I recently took out the Baffle for a short, SHORT period of time and heard the sound of it. OH. MY.
 
It was beautiful. I did notice some pipe color changes, running lean and also loss of power due to no BP any more. So I popped it back in. Much easier than I have read. Getting it out only took a few wacks with a ruber mallet on a pair of large angeled pliars in an outward direction to get it out. No damage was done to the Baffle!
 
Anyways, after hearing it I have decided I must have that sound all the time!
 
Just one question.. Will adding the EJK bring back the power that I lost when I had the Baffle out? More fuel=more power in some cases right..?
 
Any help apreciated!

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aeisan
Ha... I love posts like this... Folks' reactions to hearing what the potential of the bike is for the fist time are priceless. Welcome to the board, by the way!
 
With the EJK, yes will will certainly get back more power. It'll feel a little different still in some parts of the rev range though, because of the way exhaust systems work. It'll technically have more higher end HP, but may lack some lower end torque. Mid range may vary a bit too based on how you fuel it. The EJK will get some of it back that you felt you lost taking that baffle out, but not ALL of it.  Again though, open that bad boy up and you won't worry too much about the little bit of low end you lost. :D
 
"More fuel = more power in SOME cases." -- Big bold underline on some...  If you run too rich you will lose some power and throttle response.  Mostly this will be felt via crappy throttle response when you roll on the throttle while cruising; it'll just feel like it doesn't want to go.  The idea is to get the right amount of air-to-fuel ratio (AFR).  Dobeck did a decent job testing some popular setups, and yours sounds like one of them.  I would start with their initial suggested settings and see what you think.  Odds are it's going to be pretty close.  If you know what you are doing, you can then adjust from there.  If not... We are here to help.  
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maxhfz
Ha... I love posts like this... Folks' reactions to hearing what the potential of the bike is for the fist time are priceless. Welcome to the board, by the way! 
With the EJK, yes will will certainly get back more power. It'll feel a little different still in some parts of the rev range though, because of the way exhaust systems work. It'll technically have more higher end HP, but may lack some lower end torque. Mid range may vary a bit too based on how you fuel it. The EJK will get some of it back that you felt you lost taking that baffle out, but not ALL of it.  Again though, open that bad boy up and you won't worry too much about the little bit of low end you lost. :D
 
"More fuel = more power in SOME cases." -- Big bold underline on some...  If you run too rich you will lose some power and throttle response.  Mostly this will be felt via crappy throttle response when you roll on the throttle while cruising; it'll just feel like it doesn't want to go.  The idea is to get the right amount of air-to-fuel ratio (AFR).  Dobeck did a decent job testing some popular setups, and yours sounds like one of them.  I would start with their initial suggested settings and see what you think.  Odds are it's going to be pretty close.  If you know what you are doing, you can then adjust from there.  If not... We are here to help.  
 
 
Thanks for the response!
 
I think I'll be making my order here in the next few weeks, hopefully they are working on a tune for the way I want it set up. It seems the have one for every other exhaust with the baffle out except mine ????

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aeisan
Ha... I love posts like this... Folks' reactions to hearing what the potential of the bike is for the fist time are priceless. Welcome to the board, by the way! 
With the EJK, yes will will certainly get back more power. It'll feel a little different still in some parts of the rev range though, because of the way exhaust systems work. It'll technically have more higher end HP, but may lack some lower end torque. Mid range may vary a bit too based on how you fuel it. The EJK will get some of it back that you felt you lost taking that baffle out, but not ALL of it.  Again though, open that bad boy up and you won't worry too much about the little bit of low end you lost. :D
 
"More fuel = more power in SOME cases." -- Big bold underline on some...  If you run too rich you will lose some power and throttle response.  Mostly this will be felt via crappy throttle response when you roll on the throttle while cruising; it'll just feel like it doesn't want to go.  The idea is to get the right amount of air-to-fuel ratio (AFR).  Dobeck did a decent job testing some popular setups, and yours sounds like one of them.  I would start with their initial suggested settings and see what you think.  Odds are it's going to be pretty close.  If you know what you are doing, you can then adjust from there.  If not... We are here to help.  
Thanks for the response!
 
I think I'll be making my order here in the next few weeks, hopefully they are working on a tune for the way I want it set up. It seems the have one for every other exhaust with the baffle out except mine ????
You bet!   
If they don't have a map for your exact setup, start with the map for the baffle in and then see how it feels.  Then you can either rent their SAFR gauge or tune it by feel... You'll probably only need to bump the yellow and red up a half to one full point.  If you go too far you should start to tell because you'll feel like you lost some acceleration power, then just bump it down a little to lean it back out.  
 
The good, and bad, thing about the EJK is that there really isn't that much FINE adjustment.  You won't really notice too much of a difference for any given setting bumped up or down a half point.  You just gotta get it close.  

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maxhfz
Thanks for the response!  
I think I'll be making my order here in the next few weeks, hopefully they are working on a tune for the way I want it set up. It seems the have one for every other exhaust with the baffle out except mine ????
You bet!   
If they don't have a map for your exact setup, start with the map for the baffle in and then see how it feels.  Then you can either rent their SAFR gauge or tune it by feel... You'll probably only need to bump the yellow and red up a half to one full point.  If you go too far you should start to tell because you'll feel like you lost some acceleration power, then just bump it down a little to lean it back out.  
 
The good, and bad, thing about the EJK is that there really isn't that much FINE adjustment.  You won't really notice too much of a difference for any given setting bumped up or down a half point.  You just gotta get it close.  
 
Yeah, that's what I thought too about the zones. Judging by the other setups they have I've noticed they do only change it by a bit.
 
Thanks!
 
I'll let you guys know my results once the time comes!
 

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qjohnson
Made a few adjustments to my EJK with awesome results. I do have my baffle out of my akra Ti and noticed that under heavy acceleration there was a significant loss of power. At first I thought my clutch was slipping or something because the bike wouldn't accelerate as hard as it used to with stock exhaust.
 
So I started with the settings dobeck provides on their website for the akra Ti and added fuel to the yellow and red zones which are acceleration and full throttle. The settings provided are 5 for the yellow and 2.5 for the red. I moved the yellow to 6 and the red to 4.
 
I'll have to mess around with it a little more but just from those changes the bike pulls a lot harder and idk if it's a just me but I did notice less backfiring and popping also.
 
I tried to base my adjustments off the differences of the graves exhaust with the baffle in and with the baffle out.

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GAZ
I also have Akra Ti with EJK. I've been using base settings with 3.5 Full throttle fuel (red) and 5.5 Acceleration fuel (yellow). Like you I've been messing around to find the best. Seems like we're getting close. I wish I was closer to Dobeck so I could dyno it. I refuse to put my baffle back in, it just sounds too awesome.
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maxhfz
I also have Akra Ti with EJK. I've been using base settings with 3.5 Full throttle fuel (red) and 5.5 Acceleration fuel (yellow). Like you I've been messing around to find the best. Seems like we're getting close. I wish I was closer to Dobeck so I could dyno it. I refuse to put my baffle back in, it just sounds too awesome.
Did you also follow the rest of the setup recommended on the Dobeck site? ie: Snorkel removed and 02 Sensor Disconnected. 
 
I'm just assuming that this is the air box snorkel..? haha
 
 
20150709_182052.png

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aeisan
Yep, that's the snorkel.

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GAZ
I also have Akra Ti with EJK. I've been using base settings with 3.5 Full throttle fuel (red) and 5.5 Acceleration fuel (yellow). Like you I've been messing around to find the best. Seems like we're getting close. I wish I was closer to Dobeck so I could dyno it. I refuse to put my baffle back in, it just sounds too awesome.
Did you also follow the rest of the setup recommended on the Dobeck site? ie: Snorkel removed and 02 Sensor Disconnected.  
I'm just assuming that this is the air box snorkel..? haha
 

Yep. Removed and disconnected.  

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maxhfz
So I have received and installed the Dobeck EJK. It came pre programmed with the Akra Ti setting with the baffle in, so I ran it like that for a few days.
 
AND OH MY GOD THE POWAAAAAAHHHH!!!
 
It's a totally new bike!
 
So... since there is no setup for it with the baffle out, I took some everyone's advise and started with the Akra ti Base setting provided by Dobeck. I have so far added Half a point to the green zone and 1 FULL POINT to the Red and Yellow zones. And I like the way it feels.
 
It pulls hard in all RPMs and gears from no matter where. And the pipes are the color I want them to be around letting know it's getting a good amount of fuel..
 
The only thing is, is that my fuel economy has went down from about 49mpg to around 39-42.. still though not bad at all!
 
But now I'm contemplating puting the baffle back in so I can hear the air being sucked in from the snorkel being removed... which is just as satisfying of a sound btw.. haha
 
Guys please, if you have this setup let me know your settings and results!
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Allan
I also have the Akrapovic Ti without baffle, snorkel removed and an EJK. I left the settings that the EJK came with and haven't changed them at all and my mpg stayed the same at about 58, and I ride my bike pretty hard most of the time.

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maxhfz
I moved the yellow to 6 and the red to 4.
 
 
Just set my bike up the same as yours Yellow 6 and Red 4.. seems good.. have you adjusted any of the settings past the green, yellow and red?

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qjohnson
 

I moved the yellow to 6 and the red to 4.
Just set my bike up the same as yours Yellow 6 and Red 4.. seems good.. have you adjusted any of the settings past the green, yellow and red?
Nah I havnt made any other adjustments yet. Seems like it could be a little bit better tho but I think the AFR tool from dobeck would be needed to get it perfect.

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riotcontrol
Anyone getting popping on sharp throttle cuts with the occasional fireball out of the pipe?
 
Running with snorkel removed, O2 disconnected and baffle out.

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