Velocity Stacks - worth the $225 for added hp?? - Kawasaki ZX-10R.net
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post #1 of 32 Old 08-05-2010, 09:39 PM Thread Starter
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Velocity Stacks - worth the $225 for added hp??

I'm debating a set of Factory Pro Velocity Stacks - is it worth it? Upside, downside?

Check out the claimed 2-6hp on these dynocharts http://www.hardracing.com/Factory%20...cityStacks.htm

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post #2 of 32 Old 08-05-2010, 11:50 PM
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Don't you have a 3rd Gen 10?

If so, we do not have the flat stacks like that.


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post #3 of 32 Old 08-06-2010, 07:40 AM Thread Starter
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Don't you have a 3rd Gen 10?

If so, we do not have the flat stacks like that.
Good catch those are the only pics I could find, they're from a ZX6R! (deleted photo)

Now if someone can answer my question? What about those Factory Pro Dyno Charts - legit?

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post #4 of 32 Old 08-06-2010, 08:03 AM
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i think they're a rip off, personal opinion. 225 bucks for a few bucks worth of aluminum and a couple minutes on a cnc lathe. they could sell these all day for 80 bucks and still turn a healthy profit, and they would sell a shit load more of them so in the long run they'd probably make alot more money.
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post #5 of 32 Old 08-06-2010, 08:15 AM
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They shift the power band around imho (ROBBING PETER TO PAY PAUL). Your also going to need a custom tune afterwards. Its one of those very last mods that you do to your bike.

Marchesini Magnesiums,Nassert beet,kawi cam,.45 headgasket,DJ PC/Ig.M/QS,velocity stacks,bmc race,gipro,sato rearsets,helibars,throttlemeisters,pazzo shorties,speedohealer,520 renthal sprockets,penske 8393 double clicker,traxxion dynamic springs,scotts stabilizer,lsl frame sliders,cox radiator guard,powerbronze hugger,puig DB,solo seat cover,Valentine1,dual low beam projectors,55w.hids, brembo superbike rotors,Goodridge superbike lines,nissin calipers and rizoma mirrors,mda123 battery.
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post #6 of 32 Old 08-06-2010, 08:19 AM Thread Starter
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My shop told me they will add substantial power in the mid-range - that's where the '08 has a bit of a gap. Don't want it to steal from the top or bottom though.
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post #7 of 32 Old 08-06-2010, 08:28 AM
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My bike was not stock so you might get diff results. You will probably gain a little down low and possibly gain 5hp in the midrange and possibly lose 2 up top. Those were my results but my bike is not stock. I had to retune the bike after installing some stacks. You will probably have to retune to net the gains. Last mod then get a tune.

Marchesini Magnesiums,Nassert beet,kawi cam,.45 headgasket,DJ PC/Ig.M/QS,velocity stacks,bmc race,gipro,sato rearsets,helibars,throttlemeisters,pazzo shorties,speedohealer,520 renthal sprockets,penske 8393 double clicker,traxxion dynamic springs,scotts stabilizer,lsl frame sliders,cox radiator guard,powerbronze hugger,puig DB,solo seat cover,Valentine1,dual low beam projectors,55w.hids, brembo superbike rotors,Goodridge superbike lines,nissin calipers and rizoma mirrors,mda123 battery.
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post #8 of 32 Old 08-06-2010, 08:30 AM
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Quote:
Originally Posted by dirt ninja View Post
they shift the power band around imho (robbing peter to pay paul). Your also going to need a custom tune afterwards. Its one of those very last mods that you do to your bike.

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post #9 of 32 Old 08-06-2010, 08:39 AM Thread Starter
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Quote:
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They shift the power band around imho (ROBBING PETER TO PAY PAUL). Your also going to need a custom tune afterwards. Its one of those very last mods that you do to your bike.
I bet it does redistribute power. I had a 2006 Z350 which had all kinds of top end but lacked mid-range as the other Zs. Guys were buying expensive plenum spacers or throttle bodies (same concept, like raising the intake stack on a motorcycle). This produced significant power gain in the mid-range but definately robbed from the top. Nice around town but not the best for 1/4 mile.
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post #10 of 32 Old 08-06-2010, 08:59 AM Thread Starter
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Check out the dyno for the ZX10R - it's showing up to 5.5hp mostly in the upper range but definate gains in mid & upper. There's no loss at the bottom.



Source: http://www.hardracing.com/Factory%20...cityStacks.htm
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