Rajun Cajun
Expert Class
Posts: 289
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posted September 29, 2011 04:46 PM
velocity stacks
Hi motorcycle fam! I am interested in purchasing some velocity stacks for my 14. I have read post, searched the Internet and viewed pics form different vendors. I do want more power up top.
1. I am wondering which vendor to go with?
2. Do I go with tall stacks for the inner two throttle bodies?
3. Shlold I go with the stacks that are shown on Schnits' site?(they look short)
Please help? Money is burning my hand because of the desire for more power! The cheapest I've seen for stacks was $218 or $239....I cant remember.
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Candy Thunder Blue 2006 ZX-14, +1 rear, RoaringToyz blocks, windscreen spikes! (VERY SHARP! DO NOT TOUCH!!!!)
Time lost can not be retrieved! Its not dumb to ask questions. Rajun Cajun
  
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BrucerZX14
Expert Class
Posts: 373
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posted September 29, 2011 05:08 PM
From what I've read, stacks won't do much at all. At least not alone.
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Rajun Cajun
Expert Class
Posts: 289
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posted September 29, 2011 05:49 PM
I wanted to see what they feel like before getting it remapped.
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Candy Thunder Blue 2006 ZX-14, +1 rear, RoaringToyz blocks, windscreen spikes! (VERY SHARP! DO NOT TOUCH!!!!)
Time lost can not be retrieved! Its not dumb to ask questions. Rajun Cajun
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Bigbore4
Zone Head
Posts: 806
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posted September 29, 2011 07:13 PM
With a decent set of stacks, on a bike that's setup proper, you should gain a couple or 3 hp.
Regardless of what some say, Intake tract length does affect output. It's a fact.
As far as cost per hp, stacks are probably less than most other mods.
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Rook
Pro
Posts: 1125
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posted September 29, 2011 09:46 PM
100$/hp. A race filter is a better investment----though i would not use that for everyday street use. In any case, 2-3 hp is not something you will notice. Get a few small hp mods together and then you have something.
Try gearing. Not actual hp increase but more zing for sure. and it is pretty cheap. 45 tooth will run about $70. the speedo corection module will cost ~300 though.
I have been curious about velocity stack too.
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chrisrok
Novice Class
Posts: 63
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posted September 30, 2011 12:16 AM
 Edited By: chrisrok on 30 Sep 2011 08:17
Rajun Cajun, just as bigbore 4 stated, the stacks are good for a couple of ponies. I build those billet stacks with a o-ring to create a more positive seal for use in turbocharged application. The shorter the stack, the more it typically lends to top end power. The suzuki busa, come with two short stacks and two longs to offer a happy medium. Most tuners install all shorts. This increases top end power, and air box volume. On a normally aspirated zx14, I have installed my short stacks, and seen two h.p. on the dyno in the higher rpm range. I don't think you would feel this by itself in the seat of the pants to be honest. Your biggest gains are going to come from a good exhaust system(Brocks, Muzzy, Tsikigi), BMC filter, and a good dyno tuned map (pc3/5, Bazzaz). And if you have the skills to pull the head and install a thinner head gasket that helps also. Tuning is your most critical component. I have come across a lot of bikes with all the right parts, (even modified motors) that would not beat a virgin stock bike due to a poor mapping/tuning. Sincerely, Chris Jones.
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Bigbore4
Zone Head
Posts: 806
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posted September 30, 2011 03:22 AM
"2-3 hp is not something you will notice. "
I beg to differ on that one. 2 or 3 hp can be the difference between pulling a gear or not pulling it, and that's a fact.
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Shane661
Needs a life
Posts: 11494
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posted September 30, 2011 04:04 AM
I found that they moved the torque peak up by a few hundred rpm, which can yield a performance increase under racing conditions.
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Bigbore4
Zone Head
Posts: 806
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posted September 30, 2011 07:17 AM
Exactly! Say you've got 100 ft lbs @ 7500, that's 143 hp. You raise it to 7800, it's 148.5.
Quite substantial.
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Rajun Cajun
Expert Class
Posts: 289
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posted September 30, 2011 09:21 AM
Why not use the race filter on the street? Is the a particular company to choose for the stacks? I see many post about using Schnitz Racing velocity stacks.
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Candy Thunder Blue 2006 ZX-14, +1 rear, RoaringToyz blocks, windscreen spikes! (VERY SHARP! DO NOT TOUCH!!!!)
Time lost can not be retrieved! Its not dumb to ask questions. Rajun Cajun
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Shane661
Needs a life
Posts: 11494
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posted September 30, 2011 09:52 AM
Edited By: Shane661 on 30 Sep 2011 17:53
quote:
Why not use the race filter on the street? Is the a particular company to choose for the stacks? I see many post about using Schnitz Racing velocity stacks.
The ones Schnitz was selling before were Factory Pro's. I believe that the Muzzy's are also Factory Pro's. Shorter stacks move the powerband up a little at the cost of a little down low.
You can use the race filter on the street. Just expect more dirt and debris to find it's way into your engine.
Velocity stacks can adjust the length of the port in an attempt to optimize for a particular rpm range. You will see that some of the Yamaha's have electronically controlled, variable length stacks. This can tailor the port length dynamically...the best of all worlds if done properly, imo.
Shane
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Rajun Cajun
Expert Class
Posts: 289
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posted September 30, 2011 01:31 PM
Thanks everyone! I will look at the Muzzy stacks and compare prices.
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Candy Thunder Blue 2006 ZX-14, +1 rear, RoaringToyz blocks, windscreen spikes! (VERY SHARP! DO NOT TOUCH!!!!)
Time lost can not be retrieved! Its not dumb to ask questions. Rajun Cajun
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Rajun Cajun
Expert Class
Posts: 289
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posted September 30, 2011 01:37 PM
I thought the race filters would catch more debris and allow more air in...!!!!! WOW! It's true that one is never to old to learn something new! Shane now I'm considering not getting a race filter...although the filter in it is the same red color as the BMC.
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Candy Thunder Blue 2006 ZX-14, +1 rear, RoaringToyz blocks, windscreen spikes! (VERY SHARP! DO NOT TOUCH!!!!)
Time lost can not be retrieved! Its not dumb to ask questions. Rajun Cajun
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Seno
Pro
BANNED FOR LIFE!
Posts: 1230
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posted September 30, 2011 02:10 PM
I went with the Factory Pro midrange stacks. There was not a noticeable change in power after I installed them. After the bike was Dyno tuned the front wheel likes to lift quite aggressively now...
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2012 Black 14R -> Completely done!
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Rajun Cajun
Expert Class
Posts: 289
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posted September 30, 2011 02:56 PM
Was your bike tuned before the stack install? If yes, that means you gained even more power after the tune with the stacks.
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Candy Thunder Blue 2006 ZX-14, +1 rear, RoaringToyz blocks, windscreen spikes! (VERY SHARP! DO NOT TOUCH!!!!)
Time lost can not be retrieved! Its not dumb to ask questions. Rajun Cajun
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Rajun Cajun
Expert Class
Posts: 289
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posted September 30, 2011 02:59 PM
My bike is tuned and I asked about yours Seno because you said "There was not a noticeable change in power after I installed them." That means I will have to find a programer that knows what the heck he/she is doing! I don't like throwing money away or to the wind!
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Candy Thunder Blue 2006 ZX-14, +1 rear, RoaringToyz blocks, windscreen spikes! (VERY SHARP! DO NOT TOUCH!!!!)
Time lost can not be retrieved! Its not dumb to ask questions. Rajun Cajun
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Shane661
Needs a life
Posts: 11494
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posted September 30, 2011 04:25 PM
Edited By: Shane661 on 1 Oct 2011 00:26
I ran no air filter at all for around 500 1/4 mile passes and at least 75 miles of WOT LSR passes, and about 1500 miles. Leakdown was around 4% on the motor. Personally I wouldn't be afraid to run a BMC race filter on the street.
Velocity stacks are one of the last areas to look for performance improvement. There are probably at least 10 other areas of bike and rider to look at that will combine to improve performance much, much more.
Shane
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epd345
Pro
Posts: 1494
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posted October 01, 2011 04:58 PM
I am currently running a BMC race filter, a couple thousand miles so far. No issues. I clean it every three months. I find zx14's fliter get dirty fast with the ram air.
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2012 ZX14, Ceramic Coated Brock's CT Meg, PCV, throttlemeister
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Seno
Pro
BANNED FOR LIFE!
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posted October 01, 2011 06:34 PM
Sorry for the slow reply. No I did not have a custom tune done before I installed the velocity stacks.
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2012 Black 14R -> Completely done!
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Rajun Cajun
Expert Class
Posts: 289
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posted October 02, 2011 06:01 AM
Hey Shane! out the 10 things to do to gain power before trying the stacks I think my bike only has two of them done. ...A power commander and a M-14. Can u list the other 8?
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Candy Thunder Blue 2006 ZX-14, +1 rear, RoaringToyz blocks, windscreen spikes! (VERY SHARP! DO NOT TOUCH!!!!)
Time lost can not be retrieved! Its not dumb to ask questions. Rajun Cajun
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Rajun Cajun
Expert Class
Posts: 289
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posted October 02, 2011 06:09 AM
Hey epd345! I was currious to see if my bike had the stacks already and found it does not. I also found a filthy stock aif filter! Its so dirty that banging it aganst the ground will not get all the debris out! DARN!!!!! Gotta get a new filter. The part number on this filter is PA-MD40.
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Candy Thunder Blue 2006 ZX-14, +1 rear, RoaringToyz blocks, windscreen spikes! (VERY SHARP! DO NOT TOUCH!!!!)
Time lost can not be retrieved! Its not dumb to ask questions. Rajun Cajun
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Shane661
Needs a life
Posts: 11494
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posted October 02, 2011 06:16 AM
Edited By: Shane661 on 2 Oct 2011 14:17
quote:
Hey Shane! out the 10 things to do to gain power before trying the stacks I think my bike only has two of them done. ...A power commander and a M-14. Can u list the other 8?
Well, remember I said "improve performance", not "gain power".
If the goal is to make the bike accelerate more quickly you will gain much, much more from weight reduction and gearing changes than you will from a few hp. There are many areas you can shave weight on the bike without breaking the bank....and if you are heavy that is another area to look at. In addition, you can get more out of what you have if you get a data logger and tune the engine under race conditions instead of on the dyno. If you are talking about dragstrip performance, there is much more to gain from your chassis setup than you will get from velocity stacks. The biggest factor of all? The rider...and there is no substitute for practice.
There are just so many things it would be hard to list them all....
Shane
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Rajun Cajun
Expert Class
Posts: 289
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posted October 02, 2011 06:21 AM
DARN! While I had the tank up, I for got to check if the flies were swatted! DOH!
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Candy Thunder Blue 2006 ZX-14, +1 rear, RoaringToyz blocks, windscreen spikes! (VERY SHARP! DO NOT TOUCH!!!!)
Time lost can not be retrieved! Its not dumb to ask questions. Rajun Cajun
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Rajun Cajun
Expert Class
Posts: 289
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posted October 03, 2011 04:21 PM
I dont put her on the track...not yet. I would love to do some weight reduction on my bike. I'm not sure if it's -1 and stock or totally stock. I woild love to go -1 and +1 or +2 ...but I want a stock looking rear sprocket. I have a BMC street filter on the way. Will I need the bike retuned for that filter install? I want to replace the stock air ducts(with silencers) with smooth ducts.
2006 Zx14 Muzzy full system(m-14 I think), power commander, Roaring toyz lowering links and blocks, stock air filter, stock velocity stacks.
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Candy Thunder Blue 2006 ZX-14, +1 rear, RoaringToyz blocks, windscreen spikes! (VERY SHARP! DO NOT TOUCH!!!!)
Time lost can not be retrieved! Its not dumb to ask questions. Rajun Cajun
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87gtNOS
Zone Head
Posts: 620
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posted October 05, 2011 03:43 PM
need some velocity stack advice.....for my snowmobile...seeing as I have all of your attention in this thread!! Guys, I would really appreciate your thoughts!!
The question is, should I shorten the stacks??!!
I will tell you that the latest version of my snowmobile uses stacks that are even an inch LONGER and it picks up HP by installing the old shorter stacks like mine.
This is basically a detuned R1 engine...Remember, rpm range is 5500 to 11000rpm.
Last year I installed a thing called a 'yamacharger'...which gives 2psi boost, and it really does. A good 15+ hp gain.
I have three pictures.
First the stock airbox, showing the stacks in place.
Then the NEW airbox installed....
and now the stock stacks next to the new airbox, showing you the position and size of the stacks!
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01 ZX12R
07 ZX14 - YEAH BABY!
03 ZX9R-traded in for the 14!!! June 07!
05 636-traded in for the 9 Sept 05
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