mokaw
Expert Class
Posts: 153
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posted January 27, 2005 11:05 AM
Muzzy stacks
Is anyone familiar with the Muzzy stock replacement stacks for the 12R and are they much of an improvement over the oem's?
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mokaw
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posted January 27, 2005 07:46 PM
I guess not.
Thanks.
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psycho1122
Pro
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posted January 28, 2005 05:07 AM
Give the members about a week to chime in......
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rac4it
Needs a job
Bergie
Posts: 3009
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posted January 29, 2005 12:33 PM
Do a search on velocity stacks, this topics have been covered at least a dozen times.
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TurboBlew
Moderator
BUSY DOING THE SCHIAVO
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posted January 29, 2005 12:59 PM
Vince Hill has written a dissertation or 2 on them. 
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mrsantafe
Zone Head
Posts: 521
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posted January 29, 2005 03:24 PM
it will give you about 3 hp spike at 7500 rpm.
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9.78@155.13 mph 1.71 60 ft @ a near mile high dragstrip
2006 ZX14 gone
2006 ZX10r (Wifes street bike)
2004 zx10r (her race bike)
2002 ZX12 (still kicking a--)
2007 gsxr 1k (race bike)
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mokaw
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Posts: 153
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posted January 29, 2005 05:10 PM
quote:
Do a search on velocity stacks, this topics have been covered at least a dozen times.
Well EXCUSE ME for asking. I DID do a search. I was asking about Muzzy stacks, not Bear stacks. The only post I could find on Muzzy stacks was the one on this thread with me asking about them.
By the way, thanks mrsantafe.
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VincentHill
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posted January 29, 2005 08:11 PM
I know very little about Muzzy Stacks (I have seen them in Gold Short and Blue stock length) I also did a search and he is correct. No one has a thread on them except him! 
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mokaw
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posted January 30, 2005 06:49 AM
Thanks Vince.
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VincentHill
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posted January 30, 2005 07:51 AM
 Edited By: VincentHill on 30 Jan 2005 08:17
quote:
Thanks Vince.
I should have added (On "This" Web site)
I did not want to remove the name of the last poster but one statement in the post I would change or add. (The Blue stacks ("Slightly longer" are the only one that have a provision for NOS Nozzles) I have not seen the "NOS" Provision on the Short Muzzy Stacks.
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dougmeyer
Needs a job
moderated
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posted January 30, 2005 08:09 AM
The muzzy stacks come in two lengths, one slightly longer than stock and on slightly shorter. These lengths were chosen to optimize two tuning changes- the shorter ones move the power peak slightly higher and are suggested for Hi rpm engines. The longer ones do the opposite, they move the torque peak down a bit, emphasizing the mid range. Like all velocity stack changes regardless of who manufactures them, if properly shaped they do not add or "find" new power, they move it around. They are tuning components and this is the way Muzzys markets them. There are no specific claims of "added" power, nor should there be. They are precision parts that afford a better seal between the engine and frame and also can accomodate nitrous nozzels.
Doug
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mrsantafe
Zone Head
Posts: 521
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posted January 31, 2005 09:28 AM
Let me clarify my finding and by no means is this a blanket statement because different bikes may get different results.
When my motor was stock with exception of a step hindle pipe my bike made 169 hp (no pc). I added the stock replacement (muzzy blue) stacks. On the dyno i saw a three hp spike at 7500 rpm's. There was no peak hp gain. . Just for sh-ts and giggles we put back the stock stacks and re-dynoed. I had the dyno guy make several pulls both ways. Then i had the dyno operator overlay the muz stack and stock stack overlay. There was a slight difference in hp maybe a horsepower from 6500-7400 rpm range and then a definate three hp spike at 7500.
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9.78@155.13 mph 1.71 60 ft @ a near mile high dragstrip
2006 ZX14 gone
2006 ZX10r (Wifes street bike)
2004 zx10r (her race bike)
2002 ZX12 (still kicking a--)
2007 gsxr 1k (race bike)
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mokaw
Expert Class
Posts: 153
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posted January 31, 2005 02:31 PM
Thanks for the replies!
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psycho1122
Pro
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posted March 12, 2006 08:43 AM
How about the T.Q. in that range mrsantafe?
Also, how much taller than stock are the Muzzy's?
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12r1
Expert Class
Posts: 390
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posted March 12, 2006 04:37 PM
My stock stacks are so distorted, the blues I just installed will surely help a bit. I knew they would'nt give any huge gain, but I just could'nt put those rubbers back in. Haven't ridden yet, so I don't know of any positive/negative results.
They look around 5mm higher.
jeff
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dougmeyer
Needs a job
moderated
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posted March 13, 2006 04:41 PM
Come on Psycho, You know the answer to that question.... The only way the hp can be higher is for the torque to be higher.
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psycho1122
Pro
Posts: 1608
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posted March 14, 2006 08:26 AM
Yeah, I know.....I was too lazy to do some math.
I was just curious as too how much h.p. though.....
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