• 4 Stroke Husqvarna Motorcycles Made In Italy - About 1989 to 2014
     TE = 4st Enduro & TC = 4st Cross

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Strange Dyno result on my TE449 -11

Robster

Robster

Husqvarna
AA Class
Hi guys,

I have a TE449 -11 with about 20 hours on it (95% tarmac use) and have kited it up with the included Akra race exhaust that comes with the bike in Europe. Also have drilled twelve 12mm holes in the airbox lid with some frogskin covering it. Finished it of with a JD Tuner 6x that I have fitted onto it.

Then went dynoing the bike last sunday using the stock Desert tire that was only 5mm lugs on so was more or less perfect for dyno run. We had problems getting the rpms from anything on the bike so we had to use a non exact emergency solution dividing top speed with gear ratio to get it to a decent level. Not exact by any means, but should be pretty close anyway. Do anyone have an idea on how to get the correct ignition signal so one can have the exact rpm?

Anyways. The following dyno chart came out after adjusting the fuel with the JD Tuner. Had to back off to minimum fuel on high rpms to get the maximum power out of it and still only got 34 bhp on rear tire at 8710 rpm and just shy of 30 Nm at 6892 rpms. Should be lots more in my book and from what I have read here.

IMG_1850[1].JPGIMG_1848[1].JPG

Could it be the stock Akra exhaust that is so restricted that it chokes the engine from using the fuel recommended by JD? I had to back out maximum from their recommendation on high rpms just to get the 34 hp. If that is so. Is there a way to derestrict the Akra so that I can get full power out of it? Or do I need to buy a FMF Powercore 4??

Any help or advices much appreciated. LOVE the bike apart from this though! Just gotta find a solution to get my hidden hp back to use. =)
 
I'd try on another dyno before you buy anything. I did 43hp with a decatted stock can, so I don't think your pipe is part of the problem.
 
Do you have the emission canister removed/plugged. Is it in race map 2(jumper installed)
You drilled the airbox, did you richen the JD tuner, was it functioning correctly.
Should be better than that.
 
Most dynos will give different readings. A lot of guys put a road tyre on for the rollers to, less slippage.

Use it as a gauge only & check there are gains. It isn't about the max figure, more about getting gains across the range of revs.
 
Hi guys,

The dyno was tested and verified to be very accurate just two days before my dyno pulls, so no mistake there.
Race map 2 is activated and the JD Tuner works like a charm. Emmision canister on the Race Akra exhaust? Did not think there was any on a race exhaust. Anyone knows if there is?
Installed it with the "aftermarket exhaust adjustments" and then made a couple of pulls after being out driving it for a couple of kilometers.
The first figures showed 26hp and it was running very rich on high rpms. Adjusted the high range via the JD Tuner to give less fuel and made a few pulls.
Better result so removed the airbox lid and filter to see if it was lacking air. No difference at all.
Leaned high rpms out to the max on the JD Tuner and then it ran better and we did maybe 10 pulls which all looked very close to eachother and like the one posted above.
The tire did not slip on the roller at allon the dyno so no problem there either. The engine just sounds like it chokes more and more above 7k. Below that it is a beast much like my friends Husa 570 in behaviour. Like that a lot!
Now I only want the top end power to arrive and all will be fine.
Ordered a FMF Powercore 4 exhaust that will go on unless I can find a reason for it to lack top end power.

Anyone know how to get the rpms on these bikes when dynoing btw? The usual clamp over the ignition cable to the spark did not work at all. Not over both cables and not over any of them separate. =(
Neither does the hourmeter work. =(


The bike
 
Robster said:
Could it be the stock Akra exhaust that is so restricted that it chokes the engine from using the fuel recommended by JD? I had to back out maximum from their recommendation on high rpms just to get the 34 hp. If that is so. Is there a way to derestrict the Akra so that I can get full power out of it? Or do I need to buy a FMF Powercore 4??

Any help or advices much appreciated. LOVE the bike apart from this though! Just gotta find a solution to get my hidden hp back to use. =)
Click to expand...

Stock bhp for your bike is 31 hp. Your Akropovic silencer, assuming it is the TE or TXC version, is highly restrictive and heavy. Some of the mods listed above will help you and it could also be partially your dyno. It's quite possible they do not have the mass tuned properly on the dyno. I wouldn't worry about how much power it is producing, but just use it to set your a/f ratios.
 
Robster said:
Hi guys,

The dyno was tested and verified to be very accurate just two days before my dyno pulls, so no mistake there.
Race map 2 is activated and the JD Tuner works like a charm. Emmision canister on the Race Akra exhaust? Did not think there was any on a race exhaust. Anyone knows if there is?
Installed it with the "aftermarket exhaust adjustments" and then made a couple of pulls after being out driving it for a couple of kilometers.
The first figures showed 26hp and it was running very rich on high rpms. Adjusted the high range via the JD Tuner to give less fuel and made a few pulls.
Better result so removed the airbox lid and filter to see if it was lacking air. No difference at all.
Leaned high rpms out to the max on the JD Tuner and then it ran better and we did maybe 10 pulls which all looked very close to eachother and like the one posted above.
The tire did not slip on the roller at allon the dyno so no problem there either. The engine just sounds like it chokes more and more above 7k. Below that it is a beast much like my friends Husa 570 in behaviour. Like that a lot!
Now I only want the top end power to arrive and all will be fine.
Ordered a FMF Powercore 4 exhaust that will go on unless I can find a reason for it to lack top end power.

Anyone know how to get the rpms on these bikes when dynoing btw? The usual clamp over the ignition cable to the spark did not work at all. Not over both cables and not over any of them separate. =(
Neither does the hourmeter work. =(


The bike
Click to expand...


I would run the bike with the airbox lid removed to see if that is causing a restriction. It is quite possible you simply have not vented the airbox enough.

Also do a TPS reset to verify that the throttle is opening 100%.

Also remove the end cap in the exhaust if it is possible to see if that helps.

Also you need to make sure it is fueling properly. Do they have a wideband O2 to go in the pipe??


You have something wrong if the dyno is anywhere close to being correct.
 
huskylove said:
I would run the bike with the airbox lid removed to see if that is causing a restriction. It is quite possible you simply have not vented the airbox enough.

Also do a TPS reset to verify that the throttle is opening 100%.

Also remove the end cap in the exhaust if it is possible to see if that helps.

Also you need to make sure it is fueling properly. Do they have a wideband O2 to go in the pipe??


You have something wrong if the dyno is anywhere close to being correct.
Click to expand...



As I have written above. The dyno was controlled a few days before my test and it was spot on correct (and have been every control) so no problems with mass or with dyno figures I am sad to say.
Airbox lid was removed and air filter too, just to make sure it was not on the intake side. So 100% sure it was not on the intake side. But still it felt like the bike was choking so really hope that the FMF Powercore 4 exhaust that I have
ordered will make it let all the power loose.
TPS reset was done before dynoing and will be done before next time too.
I have ordered a new FMF Powercore 4 exhaust that I have seen others have luck with. Will drill out the rivets in the Akra TE race exhaust to see if there is anything that can be done to open that up too since I really like the look of it
compared to the FMF.

The JD Tuner fixed the fueling since we used the dyno pulls to verify more or less hp when changing fuel. This was the maximum that we got so for sure something is wrong.

Rob
 
Robster said:
As I have written above. The dyno was controlled a few days before my test and it was spot on correct (and have been every control) so no problems with mass or with dyno figures I am sad to say.
Airbox lid was removed and air filter too, just to make sure it was not on the intake side. So 100% sure it was not on the intake side. But still it felt like the bike was choking so really hope that the FMF Powercore 4 exhaust that I have
ordered will make it let all the power loose.
TPS reset was done before dynoing and will be done before next time too.
I have ordered a new FMF Powercore 4 exhaust that I have seen others have luck with. Will drill out the rivets in the Akra TE race exhaust to see if there is anything that can be done to open that up too since I really like the look of it
compared to the FMF.

The JD Tuner fixed the fueling since we used the dyno pulls to verify more or less hp when changing fuel. This was the maximum that we got so for sure something is wrong.

Rob
Click to expand...


Can you run it with the air inlet removed & watch the FBW throttle flap, I would love to see a video of it in action to see when it is in operation, opening & closing vs load & revs. I suspect they pull 1/2 closed at times.....
 
This is going to sound very silly.....But did you remove the spark arrestor from the exhaust outlet?


If so, then maybe try unbolting the slip on.....It will be loud as hell but might be a free easy test? Just unbolt it add some fuel with the jd and let it rip :D
 
So bike was putting out 26 bhp at the start and 34 bhp at the end. 30% increase is amazing!
Most importantly how does it ride now?
 
[quote="Robster, post: 403297,

TPS reset was done before dynoing and will be done before next time too.


Rob[/quote]


I just noticed you have an '11 model TE like mine, my bike never responded to TPS resets as posted, maybe an ecu thing in this model.

Tinken did mention that this model ecu is different to others in the range as far as not being able to reflash them with the factory tool.

It may also be worth watching the throttle shafts from the side of the throttle-body at full noise with the plastic cover off & ensuring the fly-by

wire top butterfly opens fully when it should.

I had a lot of trouble with my own one doing weird things.
 
Hi guys and thanks for helping.
I have not checked for spark arrestor in the Akra.
Found too many comments about the Akra being too restrictive.
Gonna remove the FBW butterfly anyways. Do not like it.
30% hp increase is good, but know how much can be achieved so
gonna find them all.

We thought of running with only pipe, but since everything is cleaned
and plastic will be melted I turned that down.

Next dyno run will be filmed though for you to see.
 
On low rpms up to mid range the bike runs like a beast.
Just like my friends Husa 570. On higher rpms than mid range
it is like a kitten versus my old wr450 -06. Tame to say the least
with short revs. Should rev a lot more but just chokes.
 
Robster said:
Hi guys and thanks for helping.
I have not checked for spark arrestor in the Akra.
Found too many comments about the Akra being too restrictive.
Gonna remove the FBW butterfly anyways. Do not like it.
30% hp increase is good, but know how much can be achieved so
gonna find them all.

We thought of running with only pipe, but since everything is cleaned
and plastic will be melted I turned that down.

Next dyno run will be filmed though for you to see.
Click to expand...

I had a thought tonight, when I am home next (away for work ATM) I will do a high-speed film of the reactions of the fbw shaft in relation to the primary. I suspect they won't match..... we'll see :-)
 
Forget those numbers......What you doo those numbers and where you need those. :D
Main thing is that bike feels good to drive and enjoy it:cheers: ....Like all say also that others dyno show different power readings.
 
I know everyone says forget the numbers, but that is just silly. Your bike if tuned properly should be capable of power in the 40+ range.

Unless your knobby tire is slipping on the rollers. That could easily be part of the problem.

Also adjusting the ignition mapping from zip ty on my power commander made a HUGE difference as far as high rpm power goes. The factory ignition mapping must pull timing at high rpm or something. So that could also be why this 511 made 53bhp and yours made 35?

View: https://www.youtube.com/watch?v=uT7aZFn3dzI


that guy dyno's a 449 and a 511 both are in the 50hp range on the dyno, there is NO WAY a modern dyno is 50% or more innacurate unless the operator punches in some seriously wrong numbers.
 
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