iPhone tachometer
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From: theo on 8 Dec 2009 17:36 On Dec 7, 7:25 am, Marty H <hyt...(a)gmail.com> wrote: > I wonder if anyone makes this software for PC? I have a few spare > lappys at home... > > I have to do some fine tuning on the CB, and its the kinda thing where > you have to turn screw "a" and see if the rev rise or fall by 50rpm... > so a accurate tacho is a must > > I am a novice at carbies, so guessing inst really an option ATM Surely 'dropping 50 revs' is an aural indication. They don't mean "exactly 50 revs or between 49 and 51 revs". You don't need a tacho for that. I think most dwell meters have tacho capability, but analogue tacho's won't indcate a 50 rev change with the accuracy you appear to be asking for. You are just looking for a rise or fall in revs, not a specific number of rev change. You don't need a tacho for what you're trying to do. Cheers Theo
From: theo on 8 Dec 2009 17:44 On Dec 7, 4:07 pm, Marty H <hyt...(a)gmail.com> wrote: > here is the procedure to adjust the pilot screws on a NT650 (the > quickest I could find on the net, same as most I have seen) > > 1. Turn each pilot screw clockwise until it seats lightly and back > it out to the specification given. > This is an initial setting prior to the final pilot screw > adjustment. > > INITIAL OPENING: > 49 St. model California model > '88 2-1/8 turns out 2-1/2 turns out > After > '88 Front: 1-1/2 turns out > Rear: 1 turns out 1-3/8 turns out > CAUTION > * Damage to the pilot screw seat will occur if the pilot > screw is tightened against the seat. > > 2. Warm up the engine to operating temperature. > Stop and go riding for 10 minutes is sufficient. > 3. Attach a tachometer according to the manufacturer's > instructions. > 4. Adjust the idle speed with the throttle stop screw. > 5. Turn each pilot screw 1/2 turn out from the initial setting. > 6. If the engine speed increases by 50 rpm or more, turn each pilot > screw out by an additional 1/2 turn until engine speed drops by 50 rpm > or less. > 7. Adjust the idle speed with the throttle stop screw. > 8. Turn the rear cylinder carburetor pilot screw in until the > engine speed drops 50 rpm. > 9. Turn the rear cylinder carburetor pilot screw 1 turn out from > the position obtained in step 8. > 10. Adjust the idle speed with the throttle stop screw. > 11. Perform steps 8, 9 and 10 for the front cylinder carburetor > pilot screw. > 12. Drive new pilot screw plugs into the pilot screw bores with a 7 > mm valve guide driver (P/N 07942 - 8230000). When fully seated the > plug surfaces will be recessed 1 mm. I would not need a tacho to do the above Marty. This is a standard carb tuning procedure, unchanged since before Johnno was born. Theo
From: theo on 8 Dec 2009 17:47 On Dec 7, 7:51 pm, Kevin Gleeson <kevinglee...(a)imagine-it.com.au> wrote: > Moot. The word is moot. A mute is something you shove up the pointy > end of a trumpet. That's a bit mean. Shoving someone up the end of a trumpet because they can't speak. Theo
From: Kevin Gleeson on 8 Dec 2009 18:20 On Tue, 8 Dec 2009 14:47:34 -0800 (PST), theo <theodoreb(a)bigpond.com.au> wrote: >On Dec 7, 7:51�pm, Kevin Gleeson <kevinglee...(a)imagine-it.com.au> >wrote: > >> Moot. The word is moot. A mute is something you shove up the pointy >> end of a trumpet. > >That's a bit mean. Shoving someone up the end of a trumpet because >they can't speak. Done it heaps of times and never heard one of them complain ...
From: theo on 8 Dec 2009 18:33
On Dec 9, 7:22 am, g...(a)nsw.qnr.com.au wrote: > On Tue, 8 Dec 2009 14:36:03 -0800 (PST), theo wrote: > >Surely 'dropping 50 revs' is an aural indication. They don't mean > >"exactly 50 revs or between 49 and 51 revs". You don't need a tacho > >for that. I think most dwell meters have tacho capability, but > >analogue tacho's won't indcate a 50 rev change with the accuracy you > >appear to be asking for. You are just looking for a rise or fall in > >revs, not a specific number of rev change. > > >You don't need a tacho for what you're trying to do. > > You don't for that particular operation, but it's very nice to have > one for the subsequent mixture richening/egt cooling, and to gauge the > overall improvement or otherwise at throttle settings. Of course you > can do all of that aurally, but only after a lot of experience. > Having said that, I would be a bit suspicious of an app for an iPhone, > but at the price, I would be tempted to experiment. For tuning I find a pair of mercury tubes quite useful, and much more sensitive to minor adjustments. Theo |