WRECKSHOP
Expert Class
Posts: 359
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posted April 30, 2009 09:58 AM
Velocity Stacks ????
What is your opinion on Velocity Stacks ? All short or Staggered lenghts ?
  
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KZScott
Needs a life
high on speed
Posts: 7235
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posted April 30, 2009 10:15 AM
depends on the intended use of the bike
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01 ZX-12R 8.84 @ 156.3 no bars, DOT tires. Pump Gas, NA.... turbo 8.47 @ 164.
00 ZX-12R 8.62 @ 165.2 no bars, slicks, Pump Gas, 55 shot.... turbo 8.32 @173
00 ZX-12R Fastest NA Kawasaki in the world 1: 222.046 1.5: 226.390 Loring AFB
00 ZX-12R street turbo 1: 227.9 1.5: 234.1 Loring AFB
00 ZX-12R LSR turbo 1: 263.1 1.5: 266.5 Loring AFB Worlds fastest ZX-12R
CMG Racing RCC Turbos
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VincentHill
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posted April 30, 2009 11:35 AM
Short are the best for Peak Power in the Upper RPM Band and is what most Land SPeed Racers use.
Mixed are better for Street and Drag Racing. All long are best for the Turbo Applications simply because they are stronger and better for the Bottom end where a turbo is the weakest
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Made History @ Daytona and still one fast old man!!
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dougmeyer
Needs a job
moderated
Posts: 2713
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posted April 30, 2009 01:40 PM
Maybe, maybe not. Torque after the shift drop is very important....... At least that's the way I do it.
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It's not that I think you're dumb, it's just that so much of what you know isn't true....
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tcchin
Zone Head
Posts: 867
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posted April 30, 2009 02:45 PM
There are a lot of factors that go into the design of the stacks: diameter, taper, inlet radius, length, etc. There's no way to know which is better for a particular engine unless you simulate it or run on a real bike at the track or on a dyno. Even then, you need to determine where you want your power to be delivered, and how well that plays with your other engine components.
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ZRXDean
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Posts: 2225
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posted April 30, 2009 08:41 PM
These were very close in AFR after 10K. The OEM long stacks turn 90 deg toward incoming flow.
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dubious
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Needs more time to ride!
Posts: 8442
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posted April 30, 2009 11:09 PM
I guess mine will be a bog o matic.... LOL
Stock zx14 Vs Big CC
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natural selection.....
destiny will overcome intervention.
Some are not worthy of the effort.
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thutch26
Expert Class
thutch26
Posts: 483
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posted May 07, 2009 12:44 PM
 Edited By: thutch26 on 7 May 2009 21:35
hey dubious... where can i get some of that heat shield for the under the air box area? like u have on there?
I have the FP shorts i just installed just waiting on Adams to get me my shock & MC Wheel to get me my wheels back so i can get it to the dyno.... i'll keep u'all posted!!! should be pushin close to 300 on the juice!!!
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Gettin faster everytime I go to the track!!!
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Shane661
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posted May 07, 2009 12:56 PM
Edited By: Shane661 on 7 May 2009 20:57
quote:
These were very close in AFR after 10K. The OEM long stacks turn 90 deg toward incoming flow.
I'm surprised to see that Dean. One would think that shortening the stacks would optimize them for high rpm. It looks like the oem stacks on the 10R do a pretty good job of that. I'm not overly thrilled with the shape of the bell on the Factory Pro's...but I'm no expert, either. 
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VincentHill
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posted May 07, 2009 01:12 PM
Edited By: VincentHill on 7 May 2009 21:13
Dean, Would you like for me to send you a set of Bear Short stacks for testing that are EXACTLY the same as the ones used in the Bike the Magazine test where Dan Millholland son rode to a new Land Speed record at Maxton a few years back?? I am not afraid to see how they test on the Dyno on your ZX10!
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Made History @ Daytona and still one fast old man!!
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Y2KZX12R
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CompetitionCNC.com
Posts: 3762
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posted May 07, 2009 05:06 PM
quote:
I'm surprised to see that Dean. One would think that shortening the stacks would optimize them for high rpm. It looks like the oem stacks on the 10R do a pretty good job of that. I'm not overly thrilled with the shape of the bell on the Factory Pro's...but I'm no expert, either.
I don't like the bell mouth shape either on the Factory Pros. Elliptical has proven to be the best shape.
But they are longer than stock on the GSXR1000's and Dynomation shows the engine liking longer stacks on that engine combo.
Tim, does your rider like the factory pro stacks? If so where does it feel like they improve the bike most?
Vince, I like the shape of Bears bell mouth. I'd love to try a set of each on the 1427 and see how they all effect the torque curve. Vince are you still a dealer?
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Y2KZX12R
CompetitionCNC.com
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Shane661
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Posts: 11494
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posted May 07, 2009 05:17 PM
Edited By: Shane661 on 8 May 2009 01:18
quote:
I have the FP shorts i just installed just waiting on Adams to get me my shock & MC Wheel to get me my wheels back so i can get it to the dyno.... i'll keep u'all posted!!! should be pushin close to 300 on the juice!!!
Those appear to be the long stacks. Here are the short stacks:
Shane
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dubious
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posted May 07, 2009 07:22 PM
Edited By: dubious on 8 May 2009 03:25
quote:
I guess mine will be a bog o matic.... LOL
Stock zx14 Vs Big CC
Got that at the local auto performance shop, its rated for 2000 f radiant heat
I doubt you will need it, as the nos will cool your intake charge, still good for motor or turbo though...
I also did the bottom of the fuel tank, which is good no matter what ya run.
This is the stuff I used:
http://store.summitracing.com/partdetail.asp?autofilter=1&part=THE%2D13590&N=700+%2D121937+115&autoview=sku
Those stacks are for a turbo application BTW...LOL
And no I really am not too worried about bottom end power..LOL
____________
natural selection.....
destiny will overcome intervention.
Some are not worthy of the effort.
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VincentHill
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Posts: 6520
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posted May 08, 2009 07:26 AM
quote:
quote:
I'm surprised to see that Dean. One would think that shortening the stacks would optimize them for high rpm. It looks like the oem stacks on the 10R do a pretty good job of that. I'm not overly thrilled with the shape of the bell on the Factory Pro's...but I'm no expert, either.
I don't like the bell mouth shape either on the Factory Pros. Elliptical has proven to be the best shape.
But they are longer than stock on the GSXR1000's and Dynomation shows the engine liking longer stacks on that engine combo.
Tim, does your rider like the factory pro stacks? If so where does it feel like they improve the bike most?
Vince, I like the shape of Bears bell mouth. I'd love to try a set of each on the 1427 and see how they all effect the torque curve. Vince are you still a dealer?
I can send you BOTH Long and Short! I saw 3 HP on the SHort but only a Torque reversal between 4 to 7,000 with the Long and the Mixed smoothed it all out better! ..
What is the name of the company I need to look up to call you?
____________
Made History @ Daytona and still one fast old man!!
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KZScott
Needs a life
high on speed
Posts: 7235
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posted May 08, 2009 01:17 PM
VH, :
Competition CNC
____________
01 ZX-12R 8.84 @ 156.3 no bars, DOT tires. Pump Gas, NA.... turbo 8.47 @ 164.
00 ZX-12R 8.62 @ 165.2 no bars, slicks, Pump Gas, 55 shot.... turbo 8.32 @173
00 ZX-12R Fastest NA Kawasaki in the world 1: 222.046 1.5: 226.390 Loring AFB
00 ZX-12R street turbo 1: 227.9 1.5: 234.1 Loring AFB
00 ZX-12R LSR turbo 1: 263.1 1.5: 266.5 Loring AFB Worlds fastest ZX-12R
CMG Racing RCC Turbos
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tcchin
Zone Head
Posts: 867
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posted May 08, 2009 06:54 PM
quote:
where can i get some of that heat shield for the under the air box area? like u have on there?
McMaster-Carr #88475K144 and some aluminum foil tape #7631A32.
quote:
Tim, does your rider like the factory pro stacks? If so where does it feel like they improve the bike most?
To be honest, Marc has been one of our sponsors for ages, and we've been running those stacks since the day the stork brought the bike to our house, so we never compared them with the stock stacks. I have complete faith in Dynomation, however; it makes me feel better about my delusions.
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ZRXDean
Needs a job
Posts: 2225
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posted May 08, 2009 08:50 PM
quote:
Dean, Would you like for me to send you a set of Bear Short stacks for testing that are EXACTLY the same as the ones used in the Bike the Magazine test where Dan Millholland son rode to a new Land Speed record at Maxton a few years back?? I am not afraid to see how they test on the Dyno on your ZX10!
Thanks Vincent, but I'm blown these days. I should say that the the short stacks I used were the OEM units, not Factory Pro, Bear, or Muzzys.
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Y2KZX12R
Needs a job
CompetitionCNC.com
Posts: 3762
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posted May 09, 2009 04:24 AM
Vince, It will be a month or so before the engine is back together. I've got many irons in the fire....
I'd like to test them both thou on this 1427. competitioncnc.com Give me a shout and we can discuss details.
Thanks
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Y2KZX12R
CompetitionCNC.com
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VincentHill
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Posts: 6520
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posted May 09, 2009 12:16 PM
No Problem no one is going anywhere!
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Made History @ Daytona and still one fast old man!!
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