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Old 03-13-2012, 05:46 PM   #1
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09 Graves velocity stacks

I have finally pulled the trigger and bought the stacks for my 09. Im still waiting for them to come in. Before i put them in i will be putting it on a dyno next week to see what kind of power it has now so I can compare it to another dyno run after I install them. I will also be doing an ecu reflash but i havn't decided what company i will be going with though. I just wanted to share because I have been searching for dyno results for awhile before deciding to do this and I have yet to find any dyno results. So ill post what kind of power the Graves stacks make once I get them in
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Old 03-13-2012, 05:53 PM   #2
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i have almost the same set up you do so it will be interesting to see what kind of power you get. i went with flash tune and really like it. the bike is much smoother and when i get stacks i can send it back to them and they will reflash it for me for free. so cant beat that. the only thing i dont have that you do is the PCV and autotune but im interested to see what kind of numbers your put up both before and after.
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Old 03-13-2012, 06:13 PM   #3
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Lowers only or both ? Lower stacks only should give a little more topend I would assume,curious as to the results you find. Want to get a reflash for my '12 as well .After seeing dyno results from ecunleashed and flashtune I have noticed that ecunleashed only makes more power after 10 or 11,000 rpm ,where as the flashtune makes more power at 7,000 rpm or even slightly lower with both making about 9 hp. more than stock at peak hp. That being said I will get the flashtune reflash,you can get the interface cable they make for the '09 - '11 for yours from flashtune and do your own reflashes as often as you like to as many bikes as you want for less than ecunleasheds reflash only .
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Old 03-13-2012, 06:25 PM   #4
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Im doing the set (top & bottom). Can the flashtune accommodate for the different leaning stacks? I know ecu unleashed does. I was kind of leaning toward unleashed.
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Old 03-13-2012, 06:44 PM   #5
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I'm curious to know this answer as well as I'm about to finally send my ECU in.
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Old 03-13-2012, 06:53 PM   #6
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I would think so,pm flastune and ask him or ask on the flashtune interface thread . If you can wouldn't you get the flashtune then ? I personally can't see spending over $350 for a reflash from ecunleashed if flashtune can do it for $150,or buy their interface cable for less than $350 .
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Old 03-13-2012, 07:02 PM   #7
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I guess I have so more research to do before I decide which flash i will be doing with.
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Old 03-13-2012, 07:45 PM   #8
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Quote:
Originally Posted by quick kurt View Post
I would think so,pm flastune and ask him or ask on the flashtune interface thread . If you can wouldn't you get the flashtune then ? I personally can't see spending over $350 for a reflash from ecunleashed if flashtune can do it for $150,or buy their interface cable for less than $350 .
I sent them email inquiring about this (FT). I was asking about their interface and asked if they could tell me what to set the ECU for, for the Graves Stacks and all I got back from them was "You'll need to custom tune." LOL.
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Old 03-13-2012, 08:52 PM   #9
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Quote:
Originally Posted by drjak View Post
I sent them email inquiring about this (FT). I was asking about their interface and asked if they could tell me what to set the ECU for, for the Graves Stacks and all I got back from them was "You'll need to custom tune." LOL.
Does ecunleashed have a specific rpm crossover point for the upper stacks to raise ? Every bike will like a specific rpm to get the power curve to be the smoothest when they raise and start to run off of the lower stacks . Probably as much as 200 to 400 or more rpm difference to be the best point for certain bikes,you can atleast adjust that point and tune it to that with a dyno rather than have it set to whatever rpm that ecunleashed sets theirs at. I'm sure it will be good with either one but , atleast you have the option of making it perfect with the flashtune interface. I would ask SpidermanSS what rpm point in general usually works best or contact Graves,then you can get one of the 2 reflashers to set it at that rpm for you when you send them your ecu.
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Old 03-14-2012, 06:02 AM   #10
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Quote:
Originally Posted by drjak View Post
I sent them email inquiring about this (FT). I was asking about their interface and asked if they could tell me what to set the ECU for, for the Graves Stacks and all I got back from them was "You'll need to custom tune." LOL.
There is no way I'm getting a reflash that can't allow me to use my very expensive velocity stacks. So far it looks like I'm going with ecu unleashed.
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Old 03-14-2012, 06:16 AM   #11
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Old 03-14-2012, 02:34 PM   #12
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Quote:
Originally Posted by quick kurt View Post
Does ecunleashed have a specific rpm crossover point for the upper stacks to raise ? Every bike will like a specific rpm to get the power curve to be the smoothest when they raise and start to run off of the lower stacks . Probably as much as 200 to 400 or more rpm difference to be the best point for certain bikes,you can atleast adjust that point and tune it to that with a dyno rather than have it set to whatever rpm that ecunleashed sets theirs at. I'm sure it will be good with either one but , atleast you have the option of making it perfect with the flashtune interface. I would ask SpidermanSS what rpm point in general usually works best or contact Graves,then you can get one of the 2 reflashers to set it at that rpm for you when you send them your ecu.
I've asked Graves for this information before but was told that "Jett Tuning knows what to set them at" and that's all I got. I bought my Graves upper and lower stacks used, on this forum so I don't think I can call them and ask.

I'm interested in just getting my ECU flashed (not buying the interface) because all my local tuners prefer Dynojet.
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Old 03-14-2012, 03:07 PM   #13
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Quote:
Originally Posted by drjak View Post
I'm interested in just getting my ECU flashed (not buying the interface) because all my local tuners prefer Dynojet.
If your tuner customizes a dynojet map for you, you can load that as the base with the interface cable, then run a zero map on the pcv...just an option.
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Old 03-14-2012, 03:59 PM   #14
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Originally Posted by Blue 09 View Post
There is no way I'm getting a reflash that can't allow me to use my very expensive velocity stacks. So far it looks like I'm going with ecu unleashed.
You should be able to get either one to work fine with the stacks. Because the flash is just a starting point. You will then need to get either a PCV autotune or similar or get on a dyno and get a custom PCV map made and then use that.

If there was this much info out about Flash Tune when I got mine done I probably would have went with them since you can redo it as often as you like with the interface cable and how open they've been on the forums helping people and fixing bugs. With ECUnleashed it's pretty much you tell them what you have done to the bike and hope they load the correct things into the map...then tune it with the PCV.
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Old 03-14-2012, 04:23 PM   #15
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Have You seen prevoius threads about velocity stacks? They may be improvement only with race cams and more compression. As for ecu reflash, the yec reflash gives the ability to set stacs crossover revs. It actually converts stock ecu to yec leaving all street utilities and it's fully adjustable. It is even able to calibrate speedo. It would be my choice if I haven't euro model.
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Old 03-14-2012, 05:09 PM   #16
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All we need is the settings for RPM for the aftermarket stacks.

And yes they provide an improvement with the stock motor, no need to change the internals. A few users have them installed, on this forum, and reported gains, on the stock motor.
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Old 03-14-2012, 05:31 PM   #17
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And yes they provide an improvement with the stock motor, no need to change the internals. A few users have them installed, on this forum, and reported gains, on the stock motor.[/QUOTE]

This is also what I have found I have pmed flashtune to ask them about the stacks and I am waiting on a reply from them. I havent done any research on the yec ecu. The only one ive heard of eliminates all the streetablity and is very very expensive. Ive never tuned a bike so i wouldnt know where to begin. i like the flash for the fact its easy and I cant mess it up.
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Old 04-13-2012, 03:40 AM   #18
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I strapped it on the dyno and the numbers were disappointing! It only make 138hp! I have the dyno sheet I'll have to post. The air/fuel was at 10! It ran very rich. They dyno guy told me the dynojet autotune was the reason for such bad air/fuel! He advised me to lose the autotune and get a custom map. I took the autotune off and noticed a huge difference in power!
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Old 04-13-2012, 10:08 AM   #19
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I take it you had already set your "target A/F" in the auto tuner?
Graves swears by this set up as well as having the SFM you should be good to go??
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Old 04-13-2012, 10:32 AM   #20
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There is a rpm where you can start for the secondaries to lift off. A birdie told me a good starting point. Pm me if you want that rpm. Its a good start.
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