Honda-SOHC
SOHC.co.uk Forums => CB500/550 => Topic started by: Woodside on June 07, 2016, 07:12:32 AM
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Dyno run video
https://m.youtube.com/watch?feature=youtu.be&v=8AXsMvn77wk
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I don't know why people do this. A friend has a dyno set up and blows up at least one engine a week. It is the shock on the customers face when this all goes wrong and Ralph just says, well you just paid me to do it.
If I want to go faster, I take out a faster bike ;)
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That video is scary. Unless your blowing 100 mph cold air over the front of the bike it's going to drastically overheat. BOOM. Utter madness using those cheap diy Dyno's. Spoke to a guy who uses similar gear about it, he said almost the same as Trigger one engine a fortnight. Decided not to bother at that point.
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Completely agree with Roy and Trigger. If you are racing competitively that's one thing - in which case use a proper dyno with proper engine cooling facilities. I shudder at running an air cooled motor like this without proper cooling, Recipe fpr disaster.
I personally prefer to work with restored originality and if the bike is running well generally and used for sunny days out and classic shows why risk blowing it up for 5 Hp
If you are classic racing or a power fiend fine by me but use the right equipment and manage risk.
Just my personal view
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What is scary about that run or did I miss something? When I did mine, I was surprised to learn that just a small pipe blowing air (and not even that much) was enough.
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What you may have missed DeltaRider was the one engine per week destroyed (one per fortnight-ish with my local guy). The difference between these dyno's and real pro kit is considerable and so is the price to use them. They also give very little rolling resistance which allows the revs to rise super rapidly.
Watched them doing a bike at my local place in Bispham, and trust me it's scary. If you want it doing, there's a disclaimer to sign and you pay him upfront (only £75 inc VAT though). But the paying upfront bit says it all to me.
I agree with PaulBaker in that unless you race all your getting is a piece of paper to prove HP. Possibly knowing your fuelling is right and the engine is running the best it can be is an attractive proposition that why I was there. But I decided not to bother after witnessing a dyno run for myself.
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Yeah guys like I said frightening. ..
You cannot see but that has an enormous fan blowing in the front...I actually asked him to give it some on the third run...which that vid was..He said what if it let's go...
Quite honestly I would rather it went on that than down the a3...
That was at 9500 revs ish...and was enough about red line on a standard bike and this bike had class records at santa pod in the 70's it will rev higher but that pipe makes it sound unbelivably loud .and i admit curiosity got the better of me..
Don't panic it won't be doing it again ...it will however be back on to sort the mixture as it's very very rich
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This is what I'm told is in the bike
http://davestestsandarticles.weebly.com/uploads/4/8/4/5/4845046/modcycap78cb550bigbore.pdf
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Great Video!! and yes you can not see the Fan, but you can heard it!!!
Regards.