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Post by marsbar350 on Apr 16, 2013 21:29:36 GMT 1
you may have read in other posts that ive got some kenny pipes on me LC ive been wanting to do the practical sportsbikes track day at cadwell.ive known the pipes were loud and rdlclazy and muttsnutts confirmed this at the dyno testing as there is a noise limit at cadwell of 105db.i wanted my bike testing.i work for a exhaust manufacturer and we have noise testing meters to get type approved so after work went to the tech centre.kept the revs at 7kas per cadwells test.it came out at 109db  so looks like i wont be going with these pipes on  ive got carbon cans on. does anyone know whether alloy cans are any quieter  |
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Post by butchers on Apr 16, 2013 21:35:43 GMT 1
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Post by marsbar350 on Apr 16, 2013 21:45:44 GMT 1
i know butch  just a bit pissed about not being able to do cadwell wth them on |
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Post by skydemon on Apr 16, 2013 22:03:18 GMT 1
Just rev quietly. Been getting away with it for years on my diesel lol
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Post by muttsnuts on Apr 16, 2013 22:07:21 GMT 1
disconnect your tacho so they can't see the revs, before doing so, make a very small mark on your throttle grip where it sound at around 103/104 DB's, then disconnect for the cadwell day........ ;D BTW - hope the bike is running better than when I got it from you !!! I am sure it is........those pipes are the "my login name"....... ;D ;D ;D |
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Post by marsbar350 on Apr 16, 2013 22:11:18 GMT 1
disconnect your tacho so they can't see the revs, before doing so, make a very small mark on your throttle grip where it sound at around 103/104 DB's, then disconnect for the cadwell day........ ;D BTW - hope the bike is running better than when I got it from you !!! I am sure it is........those pipes are the "my login name"....... ;D ;D ;D whats that noisy fookers! your sneaky dave ;)do ya think they would fall for the rev counter cable out trick  |
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Deleted
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Post by Deleted on Apr 16, 2013 22:13:08 GMT 1
Does that mean Mick's gonna have the fastest laptime! ;D
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Post by marsbar350 on Apr 16, 2013 22:14:50 GMT 1
Does that mean Mick's gonna have the fastest laptime! ;D no chance dunc the skin tight cat suit he calls leathers will see to that he needs two guys to lift him on the bike |
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Post by Deleted on Apr 16, 2013 22:16:01 GMT 1
Does that mean Mick's gonna have the fastest laptime! ;D no chance dunc the skin tight cat suit he calls leathers will see to that he needs to guys to lift him on the bike LOL... |
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Post by tsa on Apr 16, 2013 22:22:20 GMT 1
You could try repacking the cans Andy maybe they were a bit tight with the wadding and thats now blown out mate. Worth a try mate surely.
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Post by Deleted on Apr 16, 2013 22:24:21 GMT 1
Mick will surely be polishing his 'Allspeeds' now hes heard that news! |
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Post by butchers on Apr 16, 2013 22:25:45 GMT 1
Does that mean Mick's gonna have the fastest laptime! ;D no chance dunc the skin tight cat suit he calls leathers will see to that he needs two guys to lift him on the bike pmsl ;D ;D ;D ;D ;D |
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Post by steve h on Apr 16, 2013 23:53:21 GMT 1
Is it possible to turn the cans, so as the pipe out of the end of them is
not pointing directly at the noise meter? Or even an extra angled piece
to direct the noise upwards?? that you can take off latter.
Just thinking out of the box.
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Post by Norbo on Apr 17, 2013 6:51:31 GMT 1
All you need to do is aroldite a small half moon shap pice of allot to the top of the spout that will do it . youll be less with this small mod
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Post by midlifecrisisrd on Apr 17, 2013 7:35:32 GMT 1
Hi,
Make a metal plate like a gasket to go between the can and the flange with a smaller hole on it. Say 15mm which will restrict it.
Just don't thrash it like that or you could do some damage.
Steve
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higgsy
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Post by higgsy on Apr 17, 2013 9:31:22 GMT 1
I always have problems with noise testing, my race RD/YPVS runs Martin77's with TZ end cans, the ACU limit is 105, I just scrape through with the powervalves turned off and the bike nice and warm. Never had a problem out on track, and apparently the bike is no louder than any other two stroke.
Carbon cans resonate less than alloy so seem to be a little quieter.
Mungo Prentices LC was tested at 116 db last year at Pembray! Various solutions were tried including washers into the end cans, swopping the cans and taking the tacho off, we got it down to 107dbn in the end when the noise tester took pity on us.
Noise testing at tracks is variable to say the least, and I've had loads of of different results over the years. One of the problems I have is the noise test is measured at 7000 just when the pipes get into their stride and resonate :-(
Be careful if you are doing a weekend at Mallory, it was and still is I think a 95db limit. I don't possess any bike that will make that, and many new standard bikes failed it.
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Post by Deleted on Apr 17, 2013 10:55:47 GMT 1
Does that mean Mick's gonna have the fastest laptime! ;D Mick would have the fastest lap time, even if marsbar passed the noise test and I was on a 125lc ;D think you should do as muttsnuts says and get the bike nice and warm and see where you are running below noise limit, mark the throttle and disconnect the rev counter So get it booked and don't be messing about in novice group get yourself in the intermediate group with me and norbo |
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Post by steve h on Apr 17, 2013 20:51:40 GMT 1
"Mick would have the fastest lap time even if mars passed the noise test and I was on a 125"
Yes, because the poor b***ard probably hasn't slept for over 24 hours because of someone imitating Holyhead fog horn in their dreams!!!!
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Deleted
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Post by Deleted on Apr 18, 2013 13:43:55 GMT 1
Steve its all part of my master plan to put everyone off and then the chequered flag is mine all mine ;D ;D
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Post by marsbar350 on Apr 18, 2013 17:11:17 GMT 1
You could try repacking the cans Andy maybe they were a bit tight with the wadding and thats now blown out mate. Worth a try mate surely. are they easy to get apart ive got a riveter i |
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Post by tsa on Apr 18, 2013 19:00:56 GMT 1
Yes mate just drill the heads off the rivets at the outlet end this way its easier to repack and assemble.
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Post by Dieseldog on Apr 18, 2013 20:30:56 GMT 1
Do they test just before going on track or during prior inspection? Can you not fit a quite set for the test and swap for the slightly 'illegal' ones for the track?
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Deleted
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Post by Deleted on Apr 18, 2013 20:50:39 GMT 1
they have db meters for when you are going round the track too, just for such eventualities  |
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hazey
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Post by hazey on Apr 18, 2013 22:46:05 GMT 1
Oh noooooo,doing 1000 bikes at mallory this year with the 400 which ive never had to do a noise test to,no chance of getting it anywhere near 95db |
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Post by Deleted on Apr 18, 2013 22:48:27 GMT 1
didn't they say about noise limit when you booked hazey?
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Post by Deleted on Apr 18, 2013 22:55:42 GMT 1
just had a look at the entry form for festival of a thousand bikes and it just says Saturday for road silenced bikes and sunday for race machines up to 105 db
mmmmm that's about as clear as mud then
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hazey
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Post by hazey on Apr 18, 2013 23:04:25 GMT 1
didn't they say about noise limit when you booked hazey? Dont remember reading anything with the confirmation letter i had. Spose i could put the original allspeed stingers back in,but even they have been shortened  and she dont go so well on um ones in now are larger dia stinger. |
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Post by marsbar350 on Apr 19, 2013 7:55:11 GMT 1
im going to take the end cans aprt and see if theres anything in them does anyone know the size of the rivets used on kennys carbon cans |
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Post by muttsnuts on Apr 19, 2013 8:10:02 GMT 1
does anyone know the size of the rivets used on kennys carbon cans Yeah..............Kenny........ ;D ;D |
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Post by marsbar350 on Apr 19, 2013 10:54:44 GMT 1
using 4mm rivets ive picked up today lets see how it goes |
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and she dont go so well on um