more midrange with 2, more top end with 4? that would be my geuss
velocity stacks question
i noticed when reading the directions for the velocity stacks, on my 2003 R6, that it says for road racing only install 2, and for drag racing install all 4, now what is the diffrence in installing 2 and 4? just curious so i know what to install when it comes time, thanks
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Yeah, more power at the top end using all four. I wouldnt use two...imo two wont make any difference.
how noticeable are v-stacks? also how noticeable are the differences between 2 and 4?
straight from Yamaha - GYTR VStack kit:
For improved power across the power band ( ideal for road racing):
* move the two stock outside stacks to the inside (cylinders 2 and 3) and then use two stacks from the kit on the outside (cylinders 1 and 4)
For maximum horsepower on top (ideal for drag racing):
* use all four stacks from the kit - gains of 5 hp on top can be achieved with proper tuning (no remapping is required)
For improved power across the power band ( ideal for road racing):
* move the two stock outside stacks to the inside (cylinders 2 and 3) and then use two stacks from the kit on the outside (cylinders 1 and 4)
For maximum horsepower on top (ideal for drag racing):
* use all four stacks from the kit - gains of 5 hp on top can be achieved with proper tuning (no remapping is required)
sideshow said:straight from Yamaha - GYTR VStack kit:
For improved power across the power band ( ideal for road racing):
* move the two stock outside stacks to the inside (cylinders 2 and 3) and then use two stacks from the kit on the outside (cylinders 1 and 4)
For maximum horsepower on top (ideal for drag racing):
* use all four stacks from the kit - gains of 5 hp on top can be achieved with proper tuning (no remapping is required)
I wonder what the power curve looks like if you don't remap. I am interested in stacks but wonder about this as I do not want to go back into the power commander game.
Just use all 4. You'll still gain mid-range power, just not as much as with 2, but almost as much, and you'll get more top end. Seriously, who likes to dither around 7000 RPM anyway? 10k+ is where the fun's at.
do you gain pretty good even without a remap? I know it won't be as good as with a custom map, but lets say you only have the stacks as a mod...
very true. im goin w all four. yamaha has a high rpm for a reason, we must utilize it in order to enjoy the true essence of what our r6's offer.CephasGT said:Just use all 4. You'll still gain mid-range power, just not as much as with 2, but almost as much, and you'll get more top end. Seriously, who likes to dither around 7000 RPM anyway? 10k+ is where the fun's at.
With just VStacks on a stock bike (I think that's what you're asking) the gains won't be all that much. Intake mods feed off of each other, meaning you're not going to get what you could off of one without doing the rest. But you'll definitely pick up at least a couple horses.epiphone3 said:do you gain pretty good even without a remap? I know it won't be as good as with a custom map, but lets say you only have the stacks as a mod...
CephasGT said:With just VStacks on a stock bike (I think that's what you're asking) the gains won't be all that much. Intake mods feed off of each other, meaning you're not going to get what you could off of one without doing the rest. But you'll definitely pick up at least a couple horses.
Now the question from there is, WITHOUT custom mapping, where might you gain that power?
I figure that having Velocity stacks as your ONLY mod, with NO custom mapping, should give you a small amount of low-end, probably break even or very small gains in the midrange, maybe a very small loss somewhere in the transition to upper midrange followed by upper midrange gains (not huge), and then may be a horse or two upstairs... or maybe you break even in terms of peak horsepower but the time you spend at peak power may last over more rpms?
Obviously I have not evidence to back up this concept, but this seems to be the trend with stacks on other bikes such as the R1, and the new Gixxer 6 and Gixxer 7.5
ANy thoughts?
I installed some onto my 01 over the weekend. I debated whether or not to install 2 or 4 as well. I said the hell with it and put all 4 in. I've noticed no loss of power on the low end at all and my bike pulls a lot smoother and stronger then it did before. I haven't had the chance to really put it through the paces at higher rpms, but like I said it was silky smooth throughout the low and midrange. I may be a little crazy but I swear my bike sounds a little different now, too. As my wife said "it sounds more growly" lol.
The intake sound is a bit different (read: better). As far as the gains you were talking about epiphone, I would expect that you'd get gains in all the same places as without a custom map, just less of them.
I think I am probably going to go ahead and give the velocity stacks a try.... now, the question is, do I want to go with those trick looking Super Flare stacks from Factory Pro or just the regular style? I know Graves doesn't make 2005 stacks, but it seems to me that they should have because the concept is exactly the same on an '04 and an '05.
Is that your only mod, jinx??jinx1812 said:I installed some onto my 01 over the weekend. I debated whether or not to install 2 or 4 as well. I said the hell with it and put all 4 in. I've noticed no loss of power on the low end at all and my bike pulls a lot smoother and stronger then it did before. I haven't had the chance to really put it through the paces at higher rpms, but like I said it was silky smooth throughout the low and midrange. I may be a little crazy but I swear my bike sounds a little different now, too. As my wife said "it sounds more growly" lol.
I installed Graves v-stacks recently in conjunction with a K&N and Graves Slide Stops. I only installed 2 on #1 and #4. I left the stock stacks on 2 and 3...oops. I'm gonna try the shorter factory stacks and install all 4 aftermarket ones and see what happens. I noticed that there is considerable more power from 9000 on up to redline. It feels sooo much stronger than before, sounds better("growly"). I also have a full system and PC to go with it. Well, worth the $90...just my 2cents.
I think I am going to go for the superflare stacks for my 2005. I think I will also go for the +4 ignition advance rotor. I think I will be happy with those and they will allow me to mod without having to get a PCIII.
What do you all think of that? I should end up liking that. Do you guess think that Velocity Stacks and/or the +4 ignition advance will help my on/off throttle abruptness??
By the way, does anybody here know of an octane booster that works with our bikes? I am just looking for something that comes in a bottle that I can buy at Autovalue or a gas station or something. Reason I am asking is that it is possible I will ride places that do not have Premium gas in the future and I guess that with an ignition advancer I would need to run regular gas plus an octane booster.
What do you all think of that? I should end up liking that. Do you guess think that Velocity Stacks and/or the +4 ignition advance will help my on/off throttle abruptness??
By the way, does anybody here know of an octane booster that works with our bikes? I am just looking for something that comes in a bottle that I can buy at Autovalue or a gas station or something. Reason I am asking is that it is possible I will ride places that do not have Premium gas in the future and I guess that with an ignition advancer I would need to run regular gas plus an octane booster.
I think that having a PC is almost mandatory. Maybe I dont know what I'm talking about, but I think a PC will give you overall greater flexibility when tuning your bike. Just my 2 cents again.
I think that you should go ahead and get a PCIII, and be done with it. If you can't... I honestly can't say how the bike will react, since I did a PCIII before all my other mods.epiphone3 said:I think I am going to go for the superflare stacks for my 2005. I think I will also go for the +4 ignition advance rotor. I think I will be happy with those and they will allow me to mod without having to get a PCIII.
What do you all think of that? I should end up liking that. Do you guess think that Velocity Stacks and/or the +4 ignition advance will help my on/off throttle abruptness??
By the way, does anybody here know of an octane booster that works with our bikes? I am just looking for something that comes in a bottle that I can buy at Autovalue or a gas station or something. Reason I am asking is that it is possible I will ride places that do not have Premium gas in the future and I guess that with an ignition advancer I would need to run regular gas plus an octane booster.
As for the octane booster, I wouldn't bother with it. Lots of people on the board have run 87 in their bikes with no problems, so if you get in a situation where premium isn't available, don't worry about it. I've run 89 in my bike several times and not had any issues with it.
CephasGT said:I think that you should go ahead and get a PCIII, and be done with it. If you can't... I honestly can't say how the bike will react, since I did a PCIII before all my other mods.
As for the octane booster, I wouldn't bother with it. Lots of people on the board have run 87 in their bikes with no problems, so if you get in a situation where premium isn't available, don't worry about it. I've run 89 in my bike several times and not had any issues with it.
I had an email chat with Marc from Factory Pro and he says that with no FI tuning, the Velocity stacks will still give some benefit and will make, at minimum, the same power as the stock bike.
He says that you should gain horsepower up top, especially in the over-rev area. He indicated that you should make a bit more peak and/or spend more revs at peak than the stocker also.
He also says that you should get snappier throttle response.
He also said that tuning the FI for the stacks would basically help you gain in all the same places as running the stacks with no FI tuning, but the gains would just be bigger if you did tune.
I know tuning with a PCIII would help, I just don't want to increase my fuel consumption so I am looking for mods that work with no PCIII. The guys I ride with most ride a Kawi Ninja 650R and a FJR1300 which have way better range than me, so I need to keep my range high. Plus, I had a PCIII and sold it, so I don't think I feel too right about buying another one and losing even more money!
Cephas, even with the +4 ignition advance, you don't think octane booster would be required??
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