Joined Nov 2004
18 Posts | 0+
Oceanside, California
Head Pipe Lengths
Yeah, I was just looking at the Husaberg brochure I have of the 98 models and I noticed that the bends and lengths of the head pipes vary between the different models (not only cc but model designation). I guess the pipes for the enduro model FE 's are tuned for more torque and the FC more top end. From the photos, the collectors on the works models are about even with the cylinder head but on the stock bikes they're back above the swing arm pivot.
I see the factory KTM supermoto bikes run twin pipes, I guess there is a power gain to be had that is worth the additional weight. Maybe I could Frankenstien together a set of twin pipes out of spare parts........
Yeah, I was just looking at the Husaberg brochure I have of the 98 models and I noticed that the bends and lengths of the head pipes vary between the different models (not only cc but model designation). I guess the pipes for the enduro model FE 's are tuned for more torque and the FC more top end. From the photos, the collectors on the works models are about even with the cylinder head but on the stock bikes they're back above the swing arm pivot.
I see the factory KTM supermoto bikes run twin pipes, I guess there is a power gain to be had that is worth the additional weight. Maybe I could Frankenstien together a set of twin pipes out of spare parts........
Joined Nov 2001
17K Posts | 773+
Ely, England
bergryder and simon
my mistake lads i didn't explain!
i meant that it appears that the factory are turning out bikes with uneven length downpipes and that is VERY BAD for power. if i'm right i'm amazed that nobody else has mentioned it and that nobody else is aware how much power this factory 'bodge' robs you of.
regards
Taffy
my mistake lads i didn't explain!
i meant that it appears that the factory are turning out bikes with uneven length downpipes and that is VERY BAD for power. if i'm right i'm amazed that nobody else has mentioned it and that nobody else is aware how much power this factory 'bodge' robs you of.
regards
Taffy
Joined Nov 2001
17K Posts | 773+
Ely, England
it's my understanding that all things in an engine get "dragged down" to the lower point and infact don't even middle out at all.
do 8 oarsman work better in unison or with one oar always pulling in a multiblade rowing boat?
if you want more mid then you make them both work there and the same goes for top end.
to me it's a fudge that we owners have ignored but i trust a tuner wouldn't.
regards
Taffy
regards
Taffy
do 8 oarsman work better in unison or with one oar always pulling in a multiblade rowing boat?
if you want more mid then you make them both work there and the same goes for top end.
to me it's a fudge that we owners have ignored but i trust a tuner wouldn't.
regards
Taffy
regards
Taffy
Joined Dec 2003
587 Posts | 2+
Where ever we park the motorhome, USA
As mentioned, unequal length pis do infact offer a wider powerband. On v-8 engines, road races use different length intakes as well as different length header pipes to create a wide power band.
taffy is correct, you end up with less peak power, but you may have more USABLE power over a more broad rpm range that will provide more benefit than a sharply peaked power curve.
taffy is correct, you end up with less peak power, but you may have more USABLE power over a more broad rpm range that will provide more benefit than a sharply peaked power curve.
pipes
I think after all the big bores Taffy rode in Moab he is looking for that feel of the handelbars trying to leave him behind,Someone sell him a big bore kit or a stroker crank and he will have perma-grin again.
I think after all the big bores Taffy rode in Moab he is looking for that feel of the handelbars trying to leave him behind,Someone sell him a big bore kit or a stroker crank and he will have perma-grin again.
I this an issue on a single cylinder engine? It is a major issue on multi cylinder engines. These need to have all cylinders making the same power, but I don't think a single will be effected.
I'm guessing Taffy is referring to the 05 pipes which have a major difference in length. Correct?
I to got confused when I first saw them as well and asked the Husaberg guys and their response was that it does not matter _that_ much. If it would have been so bad for performance do you think they would have let them into market?? I don't think so.
Look at the new KTMs where the pipes connect about 10cm after the outlets and compare them to the Huskys where the connector is 10cm before the silencer (english 101 again: what's the difference between a muffler and a silencer??). Two extreme examples of how to do it. I know that this isn't exactly what we talked about since the pipes on mentioned bikes are of equal length but I just wanted to point out that there are several ways of doing it.
I to got confused when I first saw them as well and asked the Husaberg guys and their response was that it does not matter _that_ much. If it would have been so bad for performance do you think they would have let them into market?? I don't think so.
Look at the new KTMs where the pipes connect about 10cm after the outlets and compare them to the Huskys where the connector is 10cm before the silencer (english 101 again: what's the difference between a muffler and a silencer??). Two extreme examples of how to do it. I know that this isn't exactly what we talked about since the pipes on mentioned bikes are of equal length but I just wanted to point out that there are several ways of doing it.
Joined Nov 2001
17K Posts | 773+
Ely, England
Hi Jo
i wouldn't have to tinker with the 550 so maybe the 450 and have it stripped and tuned within a fortnight!
i like to come on UHE and talk about my 'rearguard battle' makes me feel better to be an underdog.
but it was just sooooo easy on berger's 550!
i was spoilt.
i'll have to come back to the USA to ride yours properly next year jo!
800 yards this time?
regards
Taffy
i wouldn't have to tinker with the 550 so maybe the 450 and have it stripped and tuned within a fortnight!
i like to come on UHE and talk about my 'rearguard battle' makes me feel better to be an underdog.
but it was just sooooo easy on berger's 550!
i was spoilt.
i'll have to come back to the USA to ride yours properly next year jo!
800 yards this time?
regards
Taffy
Joined Dec 2003
587 Posts | 2+
Where ever we park the motorhome, USA
BendBerg said:
As mentioned earlier, race engine tuners have been using different lengths on the exhaust header pipes for decades. It is done intentionally to broaden the power band.
They even use different lengths intake passages to alter the power curve.
Go to any road race and look at the GTU engines, or Formula class engines..
I was under the impression that the header was redesigned after the 2004 models suffered from lack of clearance with the front wheel?????
i don't think that the different header lengths are deliberate, but a side effect of getting them out of the way?????
also, i have noticed a trend overall toward short headers(Yamaha just the 1 straight from the head). i suppose to take advantage of the titanium valves and high revs these motors are capable of???
Have Fun
Jeff
i don't think that the different header lengths are deliberate, but a side effect of getting them out of the way?????
also, i have noticed a trend overall toward short headers(Yamaha just the 1 straight from the head). i suppose to take advantage of the titanium valves and high revs these motors are capable of???
Have Fun
Jeff
headers
the big picture is user friendly,sm now uses two full length pipes
for there program,husqvarna used two full lenght pipes in the past.
these companys have alot of resources at there disposal!
i'm pretty sure they did'nt miss it by much boy's.
the big picture is user friendly,sm now uses two full length pipesfor there program,husqvarna used two full lenght pipes in the past.
these companys have alot of resources at there disposal!
i'm pretty sure they did'nt miss it by much boy's.
Joined Feb 2005
53 Posts | 0+
Singleton Australia
Taff,
Glad you like/dislike Aus humour. Because of you I've changed my profile to show the bikes I now own, not the Berg's I've owned in the past/present.
Happy now.
(Damn whinging Pom's. The smart ones stole a loaf of bread and got a free ride to Australia 200 years ago) :lol: :lol: :lol:
Glad you like/dislike Aus humour. Because of you I've changed my profile to show the bikes I now own, not the Berg's I've owned in the past/present.
Happy now.
(Damn whinging Pom's. The smart ones stole a loaf of bread and got a free ride to Australia 200 years ago) :lol: :lol: :lol:
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