Velocity Stacks

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lumpyv
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Re: Velocity Stacks

Post by lumpyv » Fri Jun 22, 2012 9:59 am

hey darren what are you looking for? low down improvement or top end?. i would have thought altering the sprockets might be the way forward? interesting project with the air intakes though...
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Snoogle
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Re: Velocity Stacks

Post by Snoogle » Fri Jun 22, 2012 10:12 am

I've tried both double long and double short set up, I have noticed that when riding with the 2 short ones in the stutter at about 5k has mellowed out a bit, no way near as noticable....as regards the intake noise what are you lot on about?? It's none existant (with my proper exhaust).

Need to get to the dyno to try all 3 "known" set ups (original long/short mix, 2 long, 2 short)...will also try just one short one at the back (would be like chopping both down in size - makes sense to me lol) and no trumpets at all.
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VTRDark
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Re: Velocity Stacks

Post by VTRDark » Fri Jun 22, 2012 10:29 am

as regards the intake noise what are you lot on about?? It's none existant (with my proper exhaust).
Mechanically tuned ears my friend. :lol: :lol: If you listen carefully, one can hear the pistons popping away. It's a popping sound like the sound of doing an impression of a fish. No seriously your can must be wombles loud. :lol:
lumpyv wrote:hey darren what are you looking for? low down improvement or top end?. i would have thought altering the sprockets might be the way forward? interesting project with the air intakes though...
I would think that altering the sprockets would do the same/similar thing but altering the intakes affects the tuning (air/fuel) and could smooth out the rpm range at the same time.

(:-})
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Snoogle
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Re: Velocity Stacks

Post by Snoogle » Fri Jun 22, 2012 10:34 am

cybercarl wrote:
seriously your can must be ferking loud. :lol:
I'm kinda used to it now, although the misses was a bit pissed off when I came back at about 11 the other night for a "bimble" about lol :thumbup:

Need to get hold of that DB meter again. The one I DL for my phone doesnt seem to work for some reason, its stuck on 120db even in quiet spaces lol
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VTRDark
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Re: Velocity Stacks

Post by VTRDark » Fri Jun 22, 2012 10:46 am

It's probably killed the microphone in the phone. :roll: I have a high/low setting on mine. In the instructions it says not to use the low setting with anything over (certain DB, can't remember what) as it may damage the microphone. There's also a fast/slow option for the speed of the sound and a hold option for holding the maximum db reached.

If your coming along to Al's workshop day I will bring mine along. I could post it to you, but it's a sensitive bit of equipment and I don't think it will take to kindly to being abused by mr postie.

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darrenmartin
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Re: Velocity Stacks

Post by darrenmartin » Sat Jun 23, 2012 1:10 am

Hi Lumpy :thumbup: im def looking for low-mid gains (and no, not massive) and iv just fitted new chain and sprockets with 1 tooth dropped off of the front. Add this too the 6mm spacer (rear end lift) iv just fitted and she should seem like a new bike, when next a throw my leg over her :lol:
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Swampy
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Re: Velocity Stacks

Post by Swampy » Tue Jan 08, 2019 8:05 pm

VTR1000 Lovers - Felix Dellwood
https://www.felixdellwood.com.au/vtrlovers.html

Printed carbon reinforced velocity stacks

tony.mon
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Re: Velocity Stacks

Post by tony.mon » Tue Jan 08, 2019 9:51 pm

Swampy wrote:
Tue Jan 08, 2019 8:05 pm
VTR1000 Lovers - Felix Dellwood
https://www.felixdellwood.com.au/vtrlovers.html

Printed carbon reinforced velocity stacks
Now those look very interesting, and I am pleased to see the before and after dyno charts as evidence. Worth the money for the gains, I would have said. Good find!
It's not falling off, it's an upgrade opportunity.

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fabiostar
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Re: Velocity Stacks

Post by fabiostar » Tue Jan 08, 2019 9:57 pm

iv seen a few guys on facebook get those units and from reports they seem pleased with them..
the older i get,the faster i was :lol:

Swampy
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Re: Velocity Stacks

Post by Swampy » Thu Jan 10, 2019 9:10 am

On their way

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Varastorm
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Re: Velocity Stacks

Post by Varastorm » Fri Jan 11, 2019 8:00 am

I had a fiddle with stacks a few years ago. I increased the radius & heights then I ran them on a rolling road to find out what was what.

I posted my findings on the xrv.org site :thumbup:

https://www.xrv.org.uk/forums/varadero/ ... ost1252761

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freeridenick
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Re: Velocity Stacks

Post by freeridenick » Fri Jan 11, 2019 1:59 pm

There's another guy on the Facebook group playing around with stacks too. Modelled on Kawaskai ones iirc.

I'd forgotten about those Ducati intakes Vara - tidy bit of machining to get them to fit the carbs.

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fabiostar
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Re: Velocity Stacks

Post by fabiostar » Sat Jan 12, 2019 12:06 am

good read vara , i noticed a good difference in mine even from the seat of the pants when i went from two longs to a long and a short. the motor seems to come on harder at higher revs. i did look into shortening my long stack but i could only shorten it by 3mm before i ran into the problem of the taper then not fitting into the base plate so i left it at that..
the older i get,the faster i was :lol:

Swampy
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Re: Velocity Stacks

Post by Swampy » Thu Jan 17, 2019 6:53 pm

Arrived

Swampy
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Re: Velocity Stacks

Post by Swampy » Sun Jan 20, 2019 8:59 pm

Swampy wrote:
Tue Jan 08, 2019 8:05 pm
VTR1000 Lovers - Felix Dellwood
https://www.felixdellwood.com.au/vtrlovers.html

Printed carbon reinforced velocity stacks
Fitted, balanced and run. Butt dyno calibration cert is a bit out of date but I ran out of road still pulling goooood. Still on city gearing (15/43)
Dyno next week.

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