[mikeinva]

How much of a gain can you feel.Well the less you start off with the more same gains help.you can gain 5 hp on a stock bonnie and you will feel it a bunch.I can gain or loose 5 hp on my 1087 and hardly know it.So yes small gains do mater on stock bikes.Look at it this way say your bike has 50 hp stock at the rear wheel .Adding 5 hp is adding 10% more power.So if you care how the bike runs then it maters but if you just want it to look cool I guess it dont mater.I like to run mine not look at it lol.

 

[mike-tt special]

Ahhh, but here's the key. As you make internal modifications such as; cams, head work, pistons, etc you need an efficient exhaust to enhance the additonal hp of those changes and vice versa.

So you agree, they need all the help they can get in the hp department. Me I'd go for the top contender every time. The more efficient the pump is running, the better I feel. Sound, secondary always.

Mike is right though, with all the bends in the pipe it's not very efficient. Plus, these twins need a longer exhaust run, not a shorter one. Everyone seems to think the Moto GP style short exhaust is the ticket these days, it's not and most just look ugly.

These are; S t e e t bikes not purpose built r a c e bikes.

hi shane does this mean you will be changing the exhaust on your scrambler for a d&d 2-1 because its the top contender and you won't be happy unless the pump is at its most efficient
and seeing as the scrambler headers have very tight bends and a shorter exhaust run i don't see how you could run anything else

 

[saschagast]

Hahaha, exactly.

 

[ShaneDuc]

Sorry, beat you to it. Got a TPUSA 904 cams, headwork, installed with a custom system tuned for the bike. The bends on the head pipes for the stock Scrambler are smooth and of sufficient length to make the necessary power and torque for the motor design.


I'm curious as to where you took your design cues from? Looks like a cross between a FMF Short Cone and Buell system. Also how come you didn't go to 2" head pipes? They scavange considerably better then what you have. Not really crazy about it 's looks but if it works for you, it's all that counts.

 

[mike-tt special]

it sounds like you've got a cool set-up for your scrambler shane especially the custom exhaust system which must be better than a d&d system because you said you would only have the best performing system on your bike.
i and i'm sure many others would be very intrested if you could you post some pics of it and a dyno graph also because to be honest i've become a bit bored looking at the same old exhaust systems for these bikes and something new would be great.

err! no the standard scrambler exhaust design is crp

i took my design cues from a 1967 bonneville tt special (there little clues dotted all through this thread)

wow! did you use 2" pipe on your system

if you don't mind me asking but what is it about the look you don't like? i'm open to all feedback good or bad

 

[saschagast]

Can't change everybody mike

But I love my scrambler headers and BC mini cones, probably not the most powerful but awesome look and sound. I just love those high pipes

 

[ShaneDuc]

Can't change everybody mike.........

Yep that's is correct, stop trying so hard too. I've read some of your other posts regarding the BC exhaust. It seems to me you have trouble with dissenting opinions. Let people have there own opinion without the sarcasm and I'm sure they'll reciprocate.

There are so many different exhausts out there and many different opinions. Don't feel disagreeable every time someone doesn't agree with your own taste. I'm sure there are plenty who would disagree with mine but I'm not trying to please them, just me.

Variety is the spice of life, my friend.

@Mike-tt: If I can find them I sure will. It's been awhile since the build and I'm not really sure where I put all the information.

Please reciprocate, I'd like to see how much your exhaust improved the bikes performance. Mind you, I'm not talking peak hp, more overall improvement throughout the entire power band. Have you done a baseline yet with the OEM exhaust?

 

[saschagast]

Yep that's is correct, stop trying so hard too. I've read some of your other posts regarding the BC exhaust. It seems to me you have trouble with dissenting opinions. Let people have there own opinion without the sarcasm and I'm sure they'll reciprocate.

There are so many different exhaust out there and many different opinions. Don't feel disagreeable every time someone doesn't agree with your own taste. I'm sure there are plenty who would disagree with mine but I'm not trying to please them, just me.

Variety is the spice of life, my friend

Jeezuz do you have this wrong. I keep saying I like any exhaust that looks good and sounds good. I just can't listen to terms like "horse power king" or ultimate anymore. You guys like D&Ds, that's great, I'm saying I don't care about 5hp so buy what you want. Not once did I say the BC is better, I said I wouldn't be surprised if its not much less than the D&Ds . I don't even care to get dyno results since I got a free map. But mikeinva sounds like a commercial and that's when the sarcasm comes on.

I too am rather interested in your custom scrambler exhaust. That at least sounds like fun, if it's good looking and sounds good, I'm all for it.
Though I love the mini cones on stock scrambler headers a lot.

 

[ShaneDuc]

Jeezuz do you have this wrong. I keep saying I like any exhaust that looks good and sounds good. I just can't listen to terms like "horse power king" or ultimate anymore. You guys like D&Ds, that's great, I'm saying I don't care about 5hp so buy what you want. Not once did I say the BC is better, I said I wouldn't be surprised if its not much less than the D&Ds . I don't even care to get dyno results since I got a free map. But mikeinva sounds like a commercial and that's when the sarcasm comes on.

I too am rather interested in your custom scrambler exhaust. That at least sounds like fun, if it's good looking and sounds good, I'm all for it.
Though I love the mini cones on stock scrambler headers a lot.

No don't think so. Read your response and realize what I'm saying. Your sarcasm is centered around any comments which are negative to your own belief. Just take it as simple advice and lighten up a bit. Quit taking it so personal.

You'd do well to listen to others, just like Mikeinva. His opinion is valued by most the members of the forum and he's "been there done that," so to speak. His accumulated knowledge on the subject of Triumph Twins, is quite exceptional.

A free map doesn't constitute a proper tune. Dyno tuning offers a dial in for the map, to your bike, riding style and environmental conditions. You should care about the operating efficiency of your motor. Properly tuned motors run cooler, last longer. When they're tuned correctly to all parameters and modifications, they deliver peak efficiency across the entire rpm range.

It's just a bit of friendly advice, in light of your responses to others opinions. Smile, life's a whole lot easier to accept with one on your face. Besides, it might open you up to learning something you didn't know.

 

[mikeinva]

Jeezuz do you have this wrong. I keep saying I like any exhaust that looks good and sounds good. I just can't listen to terms like "horse power king" or ultimate anymore. You guys like D&Ds, that's great, I'm saying I don't care about 5hp so buy what you want. Not once did I say the BC is better, I said I wouldn't be surprised if its not much less than the D&Ds . I don't even care to get dyno results since I got a free map. But mikeinva sounds like a commercial and that's when the sarcasm comes on.

I too am rather interested in your custom scrambler exhaust. That at least sounds like fun, if it's good looking and sounds good, I'm all for it.
Though I love the mini cones on stock scrambler headers a lot.

I tell it like it is right now D&D is the best ,if you dont like thats fine.If something better then what D&D has I will run them.I use to run preds by the way.But then preds came out along time ago.
I am happy you like your pipes you are the kinda guy those guys like it makes it easy to sell to a guy that just cares about looks and sound.Hp pipes are harder to design,that takes lots of testing you cant just send them out the door and hope they make power.
I wonder why D&D makes hp with there pipes it maybe that they been makeing pipes for a while and they make there own pipes ,there not just salesmen.

 

[saschagast]

Their, may be, their, they're Jeezuz

And at the end of the day you might make 5hp more and that just doesn't give me a stiffy.

 

[mike-tt special]

the problem with exhaust systems is they are the product of compromises, (straighter more open for hp, more tucked in for ground clearance,silencing for more acceptable noise level, finnish/shape for looks etc).
now depending on your priorities some of these features will be higher on the list than others so to insinuate that someone has fallen short because they did'nt choose the highest hp exhaust is wrong. heck mike even you gave away hp with your change from d&d 2-1 to the 2-2 just because they look and sound better, as they say "you pay your money you make your choice".

as a side note for sascha
bob farnham a leading engine tuner in the uk who's engines have won many championships in the uk from 2 strokes to classics to the latest r1 gsxr cbr and is probably the number one hinkley twin engine tuner in the uk has a very trick thrux as his personal bike and he uses the bc high pipe and mini cone system even though he could have any system he wanted, he knows he's giving up a handful of hp but accepts that for the look he wants.

 

[saschagast]

Well said. Hey mike, keep the posts coming about your TT pipe. And I want a sound clip soon

 

[wat100]

As i have said before Mike , that is an outstanding looking Bike . :beerchug

 

[mike-tt special]

Ok guys.... here it is, the tt special..filmed by my mate Andy....Oh he also uploaded, and edited the video....
Its a bit shakey but you should get the idea


http://www.youtube.com/watch?v=nx3olLSC_qk&feature=youtu.be

 

[saschagast]

they sound great, if I had a Bonnie i'd be very interested in a set. the bike looks great too, congrats man


just too bad it won't be a HP king

 

[mike-tt special]

update
i fitted an innovate mtx-l a/f ratio gauge a few weeks ago to help me adjust the fuel maps to better suit the new set-up of the bike,
but unfortunately due to the british weather i was side-tracked onto another project building a large wooden boat capable of carrying two of every beast.
but i did manage to get a couple of dry days to let me get out on the bike and adjust the fuel mapping that should be close enough to let me get it on a dyno,
so hopefully i will have some dyno charts in the next couple of weeks.

 

[mike-tt special]

Well guys..the dyno runs are done, and we even have a youtube video..

So bare in mind, this is with a 790 inlet & 865 inlet cam repositioned in the exhaust side, standard throttle bodies and the ignition advance, and fueling still to be tweeked..

 

[Papa Weeley]

Well done! That oughta be enough difference in "kick" to feel in the saddle!

 

[mike-tt special]

thanks papa weeley
if you pause the video at 5:27 and look at the torque curve you'll see how strong the power delivery feels, it makes 50 lb/ft at 2500rpm rising to 60 lb/ft+ at 4000rpm then holding that to 7500rpm (basically it pulls just as hard whatever the rpm).
i think there is alot more to come when i fit the daytona 42mm throttle bodies