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Dynojet

Modern 961 Norton Commando Motorcycles

Re: Dynojet

Postby richard-7 » Wed Mar 22, 2017 6:24 am

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Re: Dynojet

Postby comet » Wed Mar 22, 2017 9:02 am

Thanks Richard. Don't worry about the specs, it's academic as I'm going to install a Bosch coil anyway. I was just interested in understanding the readings from the OEM coil. For the primary circuits I'm getting a reading of 0.8 ohms. The meter gave a reading of 0.3 ohms just by touching the prongs together (there's no way to zero it) so I assume the actual reading would be 0.5 ohms.

For the secondary circuits I got a stable 3.3 reading on 4a (with the scale set to 200M). I couldn't get any reading with the scale on 20M - does that make sense?

The 4b reading was confusing me as it was all over the place. Sometimes there was no reading at all, then if I got a reading it would fluctuate wildly. What I found is that with the prong anywhere against the 4b post I either get no reading or a fluctuating one. I can get a stable 3.3 reading on 4b, but only if I push the prong against the very bottom of the post where it's fixed to the plastic housing.

Anyway, faulty or not, this coil won't be going back on.

Thanks for your help, in this and all your other posts.

PS - I must have been writing this while you were posting the circuit diagram, as I've just seen your post.
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Re: Dynojet

Postby TonyA » Wed Mar 22, 2017 1:38 pm

Hello Richard , Great diagram ! That really clears things up . It is always nice to see what you are measuring .

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Re: Dynojet

Postby Rojah » Mon Apr 03, 2017 8:55 am

Hi there,

I have just joined the forum, and I have some good news for you.

I "donated" my 2011 961 Sport to Dynojet last month as a test mule for their Power Commander set up. A very professional and courteous business.

I had the bike returned last week, and took it out for the first time this weekend.

It is transformed! Much better fuelling between 2500 to 3000 rpm, and much smoother acceleration right to the limiter, in every gear ;) lol

Dynojet provided me with the before and after power graphs, clearly showing the bike in standard state was running way too rich, and with a nice hike in rear wheel hp too. Interestingly the bike was making more hp than when Cycleworld Dynojet tested a 961, but then they wouldn't have thrashed it as hard as I have done on mine.

I am well pleased, and no doubt soon Dynojet will have more details to share.

Happy days

Rojah
2011 Norton Commando 961 Sport
2016 CCM GP450 S
1962 BSA Rocket Gold Star
1976 Suzuki GT500A
1972 Suzuki TS125J Duster x 2

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Re: Dynojet

Postby BritTwit » Mon Apr 03, 2017 10:35 am

Damn,

Now that's what I wanna hear!
Thanks Rojah.
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Re: Dynojet

Postby Smudge » Mon Apr 03, 2017 1:19 pm

That is good news, looking forward to having one fitted when there released.

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Re: Dynojet

Postby glb » Mon Apr 03, 2017 4:45 pm

Rojah


Thats great news Any ideas when they intend to put one into production here

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Re: Dynojet

Postby richard-7 » Mon Apr 03, 2017 6:03 pm

Super great news.
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Re: Dynojet

Postby TonyA » Tue Apr 04, 2017 5:58 am

Rojah wrote:Hi there,

I have just joined the forum, and I have some good news for you.

I "donated" my 2011 961 Sport to Dynojet last month as a test mule for their Power Commander set up. A very professional and courteous business.

I had the bike returned last week, and took it out for the first time this weekend.

It is transformed! Much better fuelling between 2500 to 3000 rpm, and much smoother acceleration right to the limiter, in every gear ;) lol

Dynojet provided me with the before and after power graphs, clearly showing the bike in standard state was running way too rich, and with a nice hike in rear wheel hp too. Interestingly the bike was making more hp than when Cycleworld Dynojet tested a 961, but then they wouldn't have thrashed it as hard as I have done on mine.

I am well pleased, and no doubt soon Dynojet will have more details to share.

Happy days

Rojah



Hello Rojah , This is great news and you must be happy ! Please be sure dyno readings are in SAE otherwise numbers read in DIN are 10 % higher. Also use 4th gear pulls and smoothing = 5 . Please post asap and let's compare. If you are making significantly more than 70 , and this is SAE , this is wonderful .! My bike did 69 on last run . Please do a search on this site . Thank you .

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Re: Dynojet

Postby Rojah » Tue Apr 04, 2017 7:58 am

Hi TonyA,

Thanks for your comments. I didn't want to post the actual graphs at this stage, as Dynojet have been so good with me, I thought that I would let them have the pleasure.

But the peak figures were as follows, bike has 8500 miles and "louder" peashooter pipes fitted.

Max power std 72.02hp @7050rpm Max torque std 57.4ft-lbs @6000rpm

Max power Dynojet 74.1hp @7230rpm Max torque Dynojet 58.44ft-lbs @5770rpm

Engine feels much happier to rev out to the limiter now especially in 3rd and 4th gears, but still gobs of torque lower down. Fun!

Regards

Rojah
2011 Norton Commando 961 Sport
2016 CCM GP450 S
1962 BSA Rocket Gold Star
1976 Suzuki GT500A
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Re: Dynojet

Postby iwilson » Thu Apr 06, 2017 10:13 pm

hmm, not a lot of hooplah unsurprisingly, gains of less than 3% are not going to get anyone excited. A graph with the before and after results is sorely needed here. Glad you're happy with the improvement.
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Re: Dynojet

Postby TonyA » Fri Apr 07, 2017 5:08 am

Hello Iwilson , The numbers he had to start with are way above mine now. I am at 69HP/53 Torque . But an additional 2HP and 2 ft lbs on top of what I have will interest me.

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Re: Dynojet

Postby richard-7 » Fri Apr 07, 2017 5:50 am

Battery boxes can crack too. Take a look next time tank is off. Mine hasnt cracked but my dads did.
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Re: Dynojet

Postby Britfan60 » Fri Apr 07, 2017 6:48 am

I think you wanted to post this under the chain guard discussion, which oddly enough is in the "cylinder head temp" thread. LOL However, I checked mine and its clean and fine. I didn't do the hard core cross country hike that your dad in in the elements, to be fair. That said, I don't baby it when I ride either.
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Re: Dynojet

Postby BritTwit » Fri Apr 07, 2017 7:37 am

iwilson wrote:hmm, not a lot of hooplah unsurprisingly, gains of less than 3% are not going to get anyone excited. A graph with the before and after results is sorely needed here. Glad you're happy with the improvement.


The numbers show that the PW will work on the 961 to zero in on the optimum AFM for best performance through the rev range. This will improve throttle response and power. This is the first piece of the puzzle in improving performance on these bikes.

However, the airbox on the Commando, and I suspect the Dominator too, is the real restriction to producing much more power. The plenum volume is just too small to support free breathing at higher RPMs for a 1000cc motor. Having a de-catted, free flowing exhaust is good, but without also relieving the intake restriction of the airbox, little can actually be gained.

I doubt that there will ever be an updated airbox to correct this problem, so the next step would be for some willing owner to bin his stock airbox, and substitute pod filters on the throttle bodies. Of course this will also require relocation of the airbox sensor and the crankcase breather line.
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