Barry, Rick and have been playing with tone generator and frequency counters. Interestingly enough, being a guitar player, 110 HZ is "A" Like an open fifth string. Just tune your belts to A!!
Barry, Rick and have been playing with tone generator and frequency counters. Interestingly enough, being a guitar player, 110 HZ is "A" Like an open fifth string. Just tune your belts to A!!
As I an a guitar, bass and harmonica player since many years that is actually exactly what I am doing.
For cam timing adjustmant I needed 180 Hz. That is about a F sharp (is that what it is called in English?) F sharp is about 183 Hz and should be good enough.
I do not bring the guitar to the garage as it is a bit inpractical. I am using a blues harp in stead. Works perfect.
Rock on.
Jocke.............
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MHR 900 1984
851 Strada 1991 (now growing to 996)
S4 984 2002
As I an a guitar, bass and harmonica player since many years that is actually exactly what I am doing.
For cam timing adjustmant I needed 180 Hz. That is about a F sharp (is that what it is called in English?) F sharp is about 183 Hz and should be good enough.
I do not bring the guitar to the garage as it is a bit inpractical. I am using a blues harp in stead. Works perfect.
Rock on.
Jocke.............
Jocke, Cool!! Interesting how all this works. If you look at the specs. for the 2V 900/ST2 engines the tension is 146HZ on the Horizontal, and 121HZ on the Vertical. At first I thought it was because of unequal stretch because one runs hotter than the other. Then I noticed that the Ducati frequency counter pickup is mounted in two different positions, one being on the long length between the drive pulley/ idler, the other cylinder the opposite, hense the shorter length is tuned at a higher pitch! Cool!
Jason those elec. tuners work much in the way a PC does, it is plugged in line between the guitar and amp so as to allow the user to read the current pitch and then it can be tuned. Some don't need an amp at all, I use a 30 year old strobe tuner ocillioscope that I run directly from the guitar with no audible sound and it measures the waves and displays it to be adjusted via the strobe. Some cheaper types used the vibration from the soundboard (guitar top or face)to transmit the waves thru the unit to be measured and then adjusted to desired pitch with no plugging in at all (acoustic guitar). I can't think of a way to use a guitar tuner unless you can figure out how to plug in a Ducati. I would imagine a very sensitive microphone placed locally used via laptop could accurately measure the pitch of the belts and display it like a strobe tuner might to allow the user to manipulate and tune the pitch. I guess by the time this stuff was sourced and verified to work it would be just as easy to get a belt tension guage for a KAJILLION dollars.
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Check your MBP rockers......Check your MBP valves......
My problem is that I can't find any reliable methof of recording the sound on a digital media. I've tried my camera with audo record, my cellphone, my PDA, etc, etc and none seem to have the required sensitivity to capture the sound in anything like what Mike shows in his example. Maybe I need to get a cheapie digital voice recorder.
If anyone has any suggestions on what works reliably - let me know!
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Ducati 996
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Hey guys, I am sincerely not trying to make light this subject but wanted to bring something up...Isn't this a bit more than necessary to adjust tension on the belts?? For example...my mechanic at my reputable dealership (not Joe Dirt down at the local AMOCO) lets me hang out in the shop when I'm getting something done. Last time I got my belts done there, he was explaining how he uses his own 'techniques' and reference points to adjust these things. He said he used the correct equipment to compare it to but on Testastretta's they all worked out the same and were in line with his method. So, he showed me what he used as a reference to adjust belts so that I could do them from now on. Is that just something you guys are not comfortable with?
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'04 800SS...Strati pipes, K&N air filter/air box, Afam 42t sproket, DID chain, Evoluzione fender eliminator, Bridgestone BT-014's
'05 749s...Evoluzione fender eliminator, Termi 54mm full-system, PCIII/Custon Map, 41t sproket, DiD chain, CF Hugger
Hey guys, I am sincerely not trying to make light this subject but wanted to bring something up...Isn't this a bit more than necessary to adjust tension on the belts?? For example...my mechanic at my reputable dealership (not Joe Dirt down at the local AMOCO) lets me hang out in the shop when I'm getting something done. Last time I got my belts done there, he was explaining how he uses his own 'techniques' and reference points to adjust these things. He said he used the correct equipment to compare it to but on Testastretta's they all worked out the same and were in line with his method. So, he showed me what he used as a reference to adjust belts so that I could do them from now on. Is that just something you guys are not comfortable with?
Yes, I think it is a bit over the top but it's nice to know when you're "right'. I have been tensioning my belts for quite a few years. I first bought the tension gauge, after a couple of times sold it as I didn't need it any longer, I knew how tight to get them by feel. For those who don't have access to a tool or a tech to show them this might just help.
Also, I have a guitar tuner that plugs into my guitar, it also has a mic for acoustic guitars. I don't know if it works off of the soundboard or the strings, have not tried it yet. If it relies on magnetic strings (ala magnetic pickup) I doubt it will work on belts.
Can I simply go to the music store and get one of those guitar tuning electronic thingie (like how specific I am? ) and tune the belts with that? You sound like a guy who may have the answer I need. Can you help me out?
I was thinking the same thing but I dont think it will work as the guitar tuners are a bit slow (just like engine some tuners). It takes a few seconds before you see something on the tuner soo I guess that it will not work. I will try to find a microphone and test it. I will let you know if it works.
Jocke............
__________________
MHR 900 1984
851 Strada 1991 (now growing to 996)
S4 984 2002
Hey guys, I am sincerely not trying to make light this subject but wanted to bring something up...Isn't this a bit more than necessary to adjust tension on the belts?? For example...my mechanic at my reputable dealership (not Joe Dirt down at the local AMOCO) lets me hang out in the shop when I'm getting something done. Last time I got my belts done there, he was explaining how he uses his own 'techniques' and reference points to adjust these things. He said he used the correct equipment to compare it to but on Testastretta's they all worked out the same and were in line with his method. So, he showed me what he used as a reference to adjust belts so that I could do them from now on. Is that just something you guys are not comfortable with?
I am curious as well. Also, where do you find a non-factory belt tension gauge for the timing belt adjustment? I have been searching through various tool distributers such as Snap-on, Mac, and Cornwell without any luck.
90 degree, two finger twist test is a pretty common method with toothed belts.
On a 4V 90degrees is too loose, look for 45 degrees on the long run between drive/roller. Or about 5mm deflection between the cam pulleys. A link to this info. is posted on speedzilla somewhere, don't remember exactly where, do a recent search.
On a 4V 90degrees is too loose, look for 45 degrees on the long run between drive/roller. Or about 5mm deflection between the cam pulleys. A link to this info. is posted on speedzilla somewhere, don't remember exactly where, do a recent search.
Actually, I use about 45 degrees on my bike for the same reason. I also look at the deflection, too. 90 degrees is a common "rule-of-thumb" for other applications.
One thing to keep in mind, you're only setting the rollers to pick up the slack. Even under moderate throttle, the "tensioned" side of those belts is very, very, tight, hence the tighter setting for dialing cams...
When I dialed my cams, I found very little "cam degree" difference between "tight" and "very tight" as far as the tension went.
On a 4V 90degrees is too loose, look for 45 degrees on the long run between drive/roller. Or about 5mm deflection between the cam pulleys. A link to this info. is posted on speedzilla somewhere, don't remember exactly where, do a recent search.
Yes, 45* between the long run on the belts, plus, at the top between the two cam pulleys, you can deflect the belt enough to where it's within 1/8" of lining up with the seam of the head and valve cover. If that makes sense. He set them correctly and then let me play with it to determine my own "feel" for checking at both locations. BUT, don't quote me on that 1/8" inch...I need to get back in there and look at my reference points, but this rings a bell for some reason.
__________________
'04 800SS...Strati pipes, K&N air filter/air box, Afam 42t sproket, DID chain, Evoluzione fender eliminator, Bridgestone BT-014's
'05 749s...Evoluzione fender eliminator, Termi 54mm full-system, PCIII/Custon Map, 41t sproket, DiD chain, CF Hugger
My problem is that I can't find any reliable methof of recording the sound on a digital media. I've tried my camera with audo record, my cellphone, my PDA, etc, etc and none seem to have the required sensitivity to capture the sound in anything like what Mike shows in his example. Maybe I need to get a cheapie digital voice recorder.
If anyone has any suggestions on what works reliably - let me know!
I just did an internet search and downloaded Goldwave. Went to my garage, installed the belts and tighted them tightish just for for fun and recorde it in my camera just like is sais and that page and it works perfect. I just tighted the belts a bit different to see what happened and I got 158,22Hz and 150,6 Hz. Tomorrow I will adjust my belts as they sould be tighted. Super easy to use.
Jocke...........
__________________
MHR 900 1984
851 Strada 1991 (now growing to 996)
S4 984 2002
Belt tension for camtiming check
). It takes a few seconds before you see something on the tuner soo I guess that it will not work. I will try to find a microphone and test it. I will let you know if it works.
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