Bonneville EFI Map for Staintunes & modified or no snorkle ??? - Triumph Forum: Triumph Rat Motorcycle Forums
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Twins Technical Talk Technical Talk for Hinckley Triumph Twins: Bonneville, T100, Speedmaster, America, Thruxton, and Scrambler.

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Old 10-27-2012, 03:32 PM   #1 (permalink)
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Minitwins
Main Motorcycle: 2012 Bonneville EFI
 
Join Date: May 2008
Location: USA
Posts: 15
Bonneville EFI Map for Staintunes & modified or no snorkle ???

I have searched and read on this subject until my eyes go blurry !
Maybe someone has experience with this set up ?

Bike : 2012 Bonneville EFI (mag wheel standard)
Exhaust : Upswept Staintune Reverse Cone Mufflers
(USA model with no cats in headers)
Airbox : Internal Restrictor in place
Stock Paper Filter

Current Snorkle Mod ; internal section trimmed off
Future Snorkle Mod ; remove snorkle & leave stock cover

GOAL : Excellent Fuel Mileage / Engine Longevity / Throttle Response

Limitations : Using one of Triumph's Arrow flash tunes

---------------------------------------------------------

Info from Staintune : "The stock bike was tested with a 2 into 2 map and showed a
performance improvement. It was then retested with the 2 into 1 map. This
gave a better performance so this map was left on the bike."

----------------------------------------------------------
Questions :
In order to achieve my goals
(1) How do these 2 maps differ ?

(2) Keeping in mind that I would like to remove the snorkle ; would there be a leanness or a pour fuel economy issue with one or both of these maps ?

Thanks for your help !
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Old 10-27-2012, 03:41 PM   #2 (permalink)
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Quote:
Originally Posted by mischief View Post
I have searched and read on this subject until my eyes go blurry !
Maybe someone has experience with this set up ?

Bike : 2012 Bonneville EFI (mag wheel standard)
Exhaust : Upswept Staintune Reverse Cone Mufflers
(USA model with no cats in headers)
Airbox : Internal Restrictor in place
Stock Paper Filter

Current Snorkle Mod ; internal section trimmed off
Future Snorkle Mod ; remove snorkle & leave stock cover

GOAL : Excellent Fuel Mileage / Engine Longevity / Throttle Response

Limitations : Using one of Triumph's Arrow flash tunes

---------------------------------------------------------

Info from Staintune : "The stock bike was tested with a 2 into 2 map and showed a
performance improvement. It was then retested with the 2 into 1 map. This
gave a better performance so this map was left on the bike."

----------------------------------------------------------
Questions :
In order to achieve my goals
(1) How do these 2 maps differ ?

(2) Keeping in mind that I would like to remove the snorkle ; would there be a leanness or a pour fuel economy issue with one or both of these maps ?

Thanks for your help !
Why don't you check out the Triumph Twin Power maps, these seem to be proving very popular.
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Old 10-27-2012, 03:53 PM   #3 (permalink)
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Minitwins
Main Motorcycle: 2012 Bonneville EFI
 
Join Date: May 2008
Location: USA
Posts: 15
I'm great with CV carbs but being EFI & computer challenged & out of money : I'm limiting this to a $60 reflash at the dealer.

So no Twinpower or other type of tuning for me.
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Old 10-28-2012, 07:43 AM   #4 (permalink)
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Sorry mate, like a politician I answered the question I wanted you to ask rather than one you did!

Quote:
Originally Posted by mischief View Post
Questions :
In order to achieve my goals
(1) How do these 2 maps differ ?

(2) Keeping in mind that I would like to remove the snorkle ; would there be a leanness or a pour fuel economy issue with one or both of these maps ?

Thanks for your help !
(1) Looking at the 2:2 map in TuneECU, the AFR table is 13:1 all over apart from a small area around idle (necessary for adaption) while the 2:1 mainly has 13.25 so slightly weaker but looking at the L & F tables (if I've understood correctly) indicates that more air flows with the 2:1 map so if nothing is corrected more fuel will be injected so it will run richer, having said that though the system will probably back the fuel flow down when/if it runs an adaption cycle.
I hope that reasoning makes some sort of sense!

(2) My theory is that if you improve your airflow the engine will become more efficient and so use less fuel BUT if your pipes are anything like the Predators I have you will probably use more throttle more often just to experience the sound and so use more fuel.
On a limited budget you are (financially) better off leaving standard!
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Old 10-28-2012, 11:53 AM   #5 (permalink)
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Minitwins
Main Motorcycle: 2012 Bonneville EFI
 
Join Date: May 2008
Location: USA
Posts: 15
Hi GDCobra,

Thanks for the input !
What I'm getting from this is that the Triumph / Arrow (hopefully that's what the Tune ECU shows) 2 into 2 map is just a bit richer & that's what I should consider if running no snorkel.

Luckily I can control myself pretty well on the throttle hand.
I've had these same mufflers on a 2007 carbed bike in the past.

I have to make my choice here fairly soon due to our emmisions law here in the USA changing on January 1 2013.
Any motorcycle or emmissions related part manufactured or sold after this date will be subject to "possible" inspection / verification that it meets emmisions & sound laws.
Some of our dealerships & aftermarket suppliers have already stopped selling ALL aftermarket exhaust systems.
Quite a few that I have spoken with will not be doing efi mapping either.

I really didn't have the money to get the bike or pipes at this time but needed to find a 2012 before they sold out & purchase the pipes before January so that I could be "grandfathered in" and not be subject to inspection & fines.

I've got to get the bike broken in & then flashed with the best tune for my goals before January 1.

So I REALLY appreciate the help from you guys that are more technically savy then myself on this subject !
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Old 10-30-2012, 10:12 AM   #6 (permalink)
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Minitwins
Main Motorcycle: 2012 Bonneville EFI
 
Join Date: May 2008
Location: USA
Posts: 15
Well..........from what I've been reading lately..........

It appears that the Norman Hyde Bellmouth which has what appears to be the same size hole as a stock lid without the snorkle......requires no adjustment to the efi fuel mapping.

So I would think that a Triumph / Arrow 2 into 1 map with the Staintune reverse cone mufflers and the snorkle removed (or NH bellmouth) should work really well.

Any one have experience with this set up ?

Thanks !
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Old 11-07-2012, 08:02 PM   #7 (permalink)
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Minitwins
Main Motorcycle: 2012 Bonneville EFI
 
Join Date: May 2008
Location: USA
Posts: 15
Well...looks like I'm talking to myself on this..........

But I just received my Norman Hyde intake bellmouth #HBK153 & the instructions state :

"On fuel injected machines 2008 on -- our extensive testing has confirmed that using this bellmouth with either stock or "off road" silencers requires no re-mapping or other changes to be made."

So it looks like my above post is the way I will be going.

Just curious anyone else have this set up ?
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Old 11-07-2012, 11:16 PM   #8 (permalink)
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So your saying if you live in the usa you won't be able to buy pipes I find that hard to believe since they say off road or not for on road use as far as what your asking sorry can't help you there
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Old 11-07-2012, 11:35 PM   #9 (permalink)
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I'm limiting this to a $60 reflash at the dealer.

my dealer charges $20 for a remap

I watch him hook his computer to my bike, takes 10 minutes

you are getting ripped off for $60
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Old 11-08-2012, 12:58 AM   #10 (permalink)
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In my opinion the TTP maps are not expensive at all once you have experienced how much better the bikes run with them. We arent talking heaps of money here.

Cheers, Simmo
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