EFI model exhaust mods

[seven]

no intention to annoy anyone, its my opinion but stock efi models whines instead of growl . Snorkels have to be removed, its only there because of legislation and i don't want it,period! i know there are slip-ons available, not sure about aftermarket headers, but the problem is remapping the ecu. anyone here know how to or have properly put on a Norman or BC pipes(with an opened air box), and tune it ? any advice is welcomed.
Thanks in advance.

 

[Stars&Bars]

After reading all that I could find and after trying some slip ons that were way to loud for my likes, I decided to take the plunge and took a piece of rebar and pounded hell out all internal baffles giving a nice deeper tonal growl to the stock pipes on my Bonnie. Not to loud but as the old childrens story goes, just right!
No remap needed but I did disconnect and then reconnected the battery to reset the ECU.
My Test ride after felt and sounded real good to me. I'm even more satisfied now than I was before with my Bonneville Black. I don't know if it make it a hair quicker but it does feel seat of the pants like it is. Might just be that deeper growl. Should of done this earlier.

 

[carlflyfish]

First off, I would like to give a big shout out to all of you over the past 2 years for the excellent comments, suggestions, and such that have helped steer me. I know that I am remiss in posting this, so please forgive me. I had bought a new 2009 Bonnie T-100 EFI, and as many have said, was never too impressed with the stock exhaust. So, I opted for D & D exhaust (the touring version.) with the airbox chop. The sound is perfect, not ear splitting, but definitely more aggressive. I installed the pipes myself, and limped the bike over to the dealer, (who, I might add, were very knowlegable and straightforward). They cautioned on riding the bike hard, till the remap was done, in that the bike will run rich and I risk the chance of burning a valve. They remapped the bike, chopped the airbox, and even dyno tested after (see attached) They were quite impressed with the air/fuel mixture, and cautioned AGAINST removing the air injection, in that the bike is running close to perfect with it still on. I have now put over 16K miles on her, and she has been running as good as the first day. I cannot say enough about the looks I get, and the people who ask about her. I just came back from a 2 week West Coast trip down the entire length of Oregon to Southern California and back, with nary a problem. The gas mileage has been any where from 39-43 mpg.

There, I've said it! Hopefully the images I attached are readable.
Regards,

Carlflyfish

 

[tbirdsp]

OK - another point of view...

I put the TOR (Triumph Off Road only) mufflers on and disabled the air injection. I didn't bother to remap the EFI, still stock. While I haven't done any dyno tuning, the bike runs smoothly and has plenty of power for me. It's certainly isn't "limping" anywhere. I don't intend on doing anything else.

My pipes have also blued MUCH less than the T-100 above.

How is a freer-flowing exhast going to make it run rich, and then how does that burn valves? Sorry, doesn't make any sense.

Do you have a "before" dyno run for comparison? The run you posted does look good.

 

[musicswapshoppe]

Have to say I am really enjoying the new threads on EFI, even tho mine is carbed. Tho I cannot add anything to this thread of relevance. I was hoping someone can clear up the Dyno reading for me. It appears that at 8000 rpm it gets 60HP ? Which is slightly lower than reading I got from a dyno on my bike. Is this good? I thought our bikes specs stated 87 Hp in spec?
Would also love to know just how many on forum have actually bashed through there stock silencers with a bar. Be it carbed or EFI models and what their thoughts were on sound/performance.
BTW dont think could annoy anyone regarding sound of stocks lol On either model's the sound is not great.

 

[carlflyfish]

What I meant by limping, is that I didn't run it hard at all till I had it remapped. It had some serious decel "popping", before I had it remapped. If I understand correctly, and please correct me if I'm wrong, that when an engine runs rich, it's burning more fuel than normal, so when it fires, it's much hotter. That being said, I dont know if tbirdsp has carbs, or fuel injected. It might make a difference. I had about 3k miles on mine before I put on the aftermarket exhaust, so all that bluing was from before. I did find another copy of the dyno, but it doesnt show any difference in the air/fuel mixture.

 

[carlflyfish]

Correction - By Limping, I meant to say that I didn't run it hard till after the remap

 

[carlflyfish]

I understand the question of the HP. I asked my mechanic, and he says that all Triumph's posted HP's are tested at the crank, and not at the rear wheel. Anybody have their stock Bonnies dyno'ed to see if this is true?

 

[carlflyfish]

BTW - musicswap, I reread my specs, and the T-100 sheet says 65.2 hp @7500 rpm. Wish I was getting 80's, that would of been nice.

 

[DIRK]

if you'll do the remap you will boost that a bit. add a k&n.

 

[seven]

If I understand correctly, and please correct me if I'm wrong, that when an engine runs rich, it's burning more fuel than normal, so when it fires, it's much hotter.

Carlflyfish, running rich happens when there is more fuel, less air. the bike feels sluggish, it doesn't run much hotter, in fact, the spark plugs would be damp with black fuel soot.
When you heard the pop, thats symptoms of being 'lean', more air, less fuel. Running too lean makes the engine really hot, therefore theres danger of damage to valves,pistons. this is much more serious in 2 strokes than 4 strokes though.

to me, blue-ish headers looks cool.

 

[seven]

usually there is no need to remap if we're just swapping the end can/slip-on, so you got that one right tbirdsp. But I'm going to open the airbox up too. The bike was developed with normal air intake in mind so I'm gonna have to bring it to what its suppose to be, thanks to some bureaucrat mf.
anyway, i'm asking because i do not have access to dyno machine. Hope to hear if anyone got experience with a power-commander kit.

 

[Bonneville1]

I opted for TORs on my 2009 Bonneville, no remap at first but the popping and occasional bang worried me so had a remap, runs nice now, left the AI working as 2 Triumph specialist's tell me that carbon can build up on the pre-cats situated in the lower section of the headers and cause overheating problems.

 

[carlflyfish]

Seven, Thanks for the info. I stand corrected.

 

[tbirdsp]

My bike is EFI also. I wasn't trying to discourage anyone from remapping, just saying that it's not essential. I have run mine very hard keeping up with friends on 1000cc sport touring bikes. No problems.

It was kind of hard to tell with the ultra-quiet stock silencers, but my bike popped a lot on decell before I disabled the air injection. Now even with the TOR's it doesn't do it at all. IMHO removing/disabling the AI only helps things.

 

[carlflyfish]

Hey, Tbird, did you remove the airbox as well?

 

[tbirdsp]

Hey, Tbird, did you remove the airbox as well?

No mine is all stock. I was thinking about removing the internal airbox restrictor, but too much of a PITA for me (have to bugger up the airbox screws with needle nose vise grips).

Your dyno runs look good. I can't find any actual rear wheel hp numbers, but claimed is 67 at the crank. There's usually about a 15% loss at the wheel, so that would be roughly 57 hp. You are at 60, which is a pretty good increase.

My main purpose in buying the Bonnie was to slow down and smell the roses, so a couple of HP don't really matter to me

 

[carlflyfish]

I couldnt agree with you more. Plenty of HP for my riding level.

 

[Kiwi]

Here's mine. This was done back in Feb, the bike would've had around 1800km (1125mi) on it at the time. It's an '09 T100 EFI, the only mods are TORS pipes and remap to suit.

 

[seven]

Hi Kiwi, tats really good to see, nearly 65hp on rear wheel! But one thing to confirm please, you said only pipe change and remap, so no air box/air injector mod??