Venturi System Velocity stacks installed on my 16 Street Triple - Page 2 - Triumph675.Net Forums
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post #11 of 18 Old 08-25-18, 17:50
kknn24
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Hello JAUNTY;

Where did you source these from? The manufacture is asking 216 Euros and UK Race Support is asking 260 Pounds that's $250 to $280 USD plus international shipping. Any US distributors you know of? Thanks for the info and nice post!

The more I ride my Street Trip, the more I want to ride my Street Trip!
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post #12 of 18 Old 08-25-18, 18:01 Thread Starter
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Quote:
Originally Posted by kknn24 View Post
Hello JAUNTY;

Where did you source these from? The manufacture is asking 216 Euros and UK Race Support is asking 260 Pounds that's $250 to $280 USD plus international shipping. Any US distributors you know of? Thanks for the info and nice post!
I got mine through EDR Performance, but Bellissimoto can get them as well as long as you email them a part number.

I like dealing with Bellissimoto. I earned $60 to use towards any products through them when I ordered my Zard.

I paid around $330 shipped for the velocity stacks though.

I'd find who ever is cheapest.

[email protected] is their email. Give them the part number off venturi system website.
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post #13 of 18 Old 08-25-18, 18:03 Thread Starter
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Originally Posted by Plasmablaster View Post
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Originally Posted by JauntyBishop View Post

I'm assuming the factory ignition timing is sufficient for the modifications I have even with the fueling dialed in.
I've been studying engine theory a lot lately and I've noticed that when a drastic change to the exhaust system is made, ignition advance needs adjustment as well. The reason is that what most people call "back pressure" (in reality it is the ability of the exhaust system to vacate the cylinder of exhaust gases and allow the phenomenon of "sucking in" fresh mixture because of the momentum of the exhaust gas, during valve overlap) affects the speed of flame spreading during the next fire cycle of the cylinder.

If you take a look at the factory ignition advance maps of the Street Triple and the Street Triple R with Arrow 3:1 you'll see significant differences in advance timing, with the ST having significantly increased values at several areas of the map. And this is according to the theory which says that the stricter exhaust causes more exhaust gas to be left within the cylinder, which impedes the spread of the flame front during the next cycle so more advance is needed to compensate for this reduced flame-spread speed.

So I suspect there are even more gains to be had if this is sorted out as well.
If I decide to install the 2006 to 2008 Daytona cams then I'll get the ignition module from power commander.
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post #14 of 18 Old 08-25-18, 18:06 Thread Starter
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Here are dyno results from Venturi System website.

This was pulled from Venturi System website for reference:

These are dyno results from a 2009 Street triple with Zard slip on and BMC air filter.

Blue Line: Stock velocity stacks, BMC filter, Zard slip on with stock tuning (92rwhp/43rwtq)

Red Line: Stock velocity stacks, BMC Filter, Zard slip on tuned with TUNEECU (95rwhp/44.8rwtq)

Green line: Venturi systems velocity stacks, Bmc filter, zard slip on, tuned with Tuneecu (98whp/46.5rwtq)
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Last edited by JauntyBishop; 08-27-18 at 05:28.
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post #15 of 18 Old 08-25-18, 18:46 Thread Starter
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Went ahead and ordered the DealerTool OBD diagnostic kit as well.

$96 shipped from UK. Seems like this would be a better option for my 2016 street triple vs using bluetooth and TuneEcu since I am getting acclimated to doing my own maintenance.

Read and clear DTC codes and reset service lights, should have live diagnostics and able to bleed ABS, and balance throttle bodies, etc.

Just another tool in the arsenal.


Plus if I ever get another triumph I can just purchase an extra key.

http://dealertoolcouk.ipage.com/interest.htm
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post #16 of 18 Old 08-26-18, 01:04
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Originally Posted by Bamboo671 View Post
So I'm curious about this mod. What's the benefit of it. I mean, the level of the UKRS stacks vs the OEM stacks are the same so what's giving it the gain? I have de-catted headers, the Arrow conical race exhaust, Rapid Bike Evo module and MWR filter. Do I stand to gain much and do you think I will run into any problems with waiting for the RB Evo module to auto-adjust the fueling?

All that said, my bike is not with me and I am just asking so I can get my shopping list going for when I get back to her! They do look super clean!

These dump more air into the combustion chamber. You will gain about 2hp/2tq, maybe more with a tune. But they make the bike run lean. So you have to get dynoed ASAP.


Other benefits are a more throaty moan when you open it up, faster throttle response. I can tell ya, on my 2014 Daytona R, it now wheelies on command, with no help.


Just ask yourself if it is worth $275 + dyno.
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post #17 of 18 Old 12-05-19, 09:12
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Originally Posted by Shamrock View Post
These dump more air into the combustion chamber. You will gain about 2hp/2tq, maybe more with a tune. But they make the bike run lean. So you have to get dynoed ASAP.


Other benefits are a more throaty moan when you open it up, faster throttle response. I can tell ya, on my 2014 Daytona R, it now wheelies on command, with no help.


Just ask yourself if it is worth $275 + dyno.
I have these velocity stacks coming and was wondering if you had a map to share? I also have the auto tuner but you mentioned a large change so i was just wondering if your take on it....what AFR are you using?
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post #18 of 18 Old 12-06-19, 20:00
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I couldn't tell you what AFR I'm using. I reckon the OEM Dynojet AFR.

I don't have my map handy. My map won't be compatible with yours, as I may have more (or less) bolt ons and such over you.


There is a large change, just let the autotune do its job. Ride it 5 miles in all conditions (full throttle, partial throttle, idling, etc). Pull over and let it rest and reset. Then repeat several times.
My Autotune said it was 39% lean (it added that much) to 4500-5500 rpm.


I do have the trims and map screenshot. But kind of inaccurate. As I have "applied" the map twice already. See attached files.


Let me clarify what I said earlier in this thread. You can expect around 2hp/2tq OVERALL, but you can also expect big gains in the midrange. About 8 tq. Look at UK race support's dyno sheet (on a 2008).

https://uk-race-support.myshopify.co...elocity-stacks


Obviously the best solution is to just get a custom tune.
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