Revs gauge?

[Ivan]

Hey I am just wodnering has anyone had any luck trying to find a Tacho for a 2 cylinder engine my bike is minus a revgauge and I really want to get one for it.

Any Help appreciated

Ivan

[Shaun]

Hey I am just wodnering has anyone had any luck trying to find a Tacho for a 2 cylinder engine my bike is minus a revgauge and I really want to get one for it.

Any Help appreciated

Ivan


I have a complete unit I imported from the USA that you can borrow if you need it for Pukekohe?

[bungbung]

http://www.bikesport.co.nz/product_info.php?products_id=105328&osCsid=eaa2bd522d4efeb6937b2cfae6a200c4

[svs]

I used to run an old one from an RGV250 on my SV. might have it lying round the garage still. give me a call

[Ivan]

I have a complete unit I imported from the USA that you can borrow if you need it for Pukekohe?

Thanks Shaun,

I appreciate the offer just I would feel really bad if I dropped it and smashed it or something burns it out
Im not desperate for it just really wanna getone on there to keep an eye on revs on long straights

Thanks any way Shaun

[Ivan]

I used to run an old one from an RGV250 on my SV. might have it lying round the garage still. give me a call

Cheers Phil I think dads got your number ill give you a ring tommorow I am over your way tonight at the airport picking dad up but it will be to late to call you then

[cowpoos]

You should beable to get a cheap electronic one from repco to work I guess.

and...why don't you just not use it??? it won't effect your riding f'all...you should beable to feel when you at max power and change...infact it may help your riding..give you one less thing to think/worry about!

[Ivan]

You should beable to get a cheap electronic one from repco to work I guess.

and...why don't you just not use it??? it won't effect your riding f'all...you should beable to feel when you at max power and change...infact it may help your riding..give you one less thing to think/worry about!

I dont need it to ride.

Mainly I want it for gearing setup for circuits to know what revs im pulling in top gear at end of straight as I dont really wanna be overreving the engine.

I can always feel ma power and change but the gauge is so much better for things like the sprints new circuits like puke etc to get a rough guess on what I should be doing gearing wise.

Also a cheap repco one wont work being made for a 4 cylinder engine it wil double the reading and also the revs will be to low on it as a car only normally revs to 7000rpm not 12000.

[cowpoos]

Also a cheap repco one wont work being made for a 4 cylinder engine it wil double the reading and also the revs will be to low on it as a car only normally revs to 7000rpm not 12000.


For crying out loud Ivan...RPM = revolutions per minute...ie...how many times the crankshaft spins 360 degrees a minute....not how many times your piston goes bang!!!

and I ment a digital one. ----> http://www.trademe.co.nz/Trade-Me-Motors/Car-parts-accessories/Performance/Gauges/auction-202951660.htm

Anyway

Ya don't need one to work out your gearing...but I can't be arsed arguing...do as you please.

[merv]

...but I can't be arsed arguing...do as you please.


Mate you must be satisfied in life now going all mellow :laugh:

[gav]

For crying out loud Ivan...RPM = revolutions per minute...ie...how many times the crankshaft spins 360 degrees a minute....not how many times your piston goes bang!!!

and I ment a digital one. ----> http://www.trademe.co.nz/Trade-Me-Motors/Car-parts-accessories/Performance/Gauges/auction-202951660.htm

Anyway

Ya don't need one to work out your gearing...but I can't be arsed arguing...do as you please.

Errrrr, Compatible with 4, 6 & 8 Cylinder Vehicles :innocent: :bash:

[cowpoos]

Errrrr, Compatible with 4, 6 & 8 Cylinder Vehicles :innocent: :bash:
Gav...have a weee ponder on this...does a crank shaft spin faster on a 4,6,8 cyclinder engine at 2000rpm??

[Ivan]

I have been speaking to a mate of myne who is a auto Electricion (SP)
and he was saying that a 4 cylinder gauge will read double the reading so at 2000 revs the gauge will be reaidng 4000 and so on he said you could make a new face for it but I dont really want to do that thats why I was looking for a gauge that is designed for 2 cylinders
Thanks Bungbung for showing me that link.

After talking to Phil I think I will try find a RGV250 gauge for it

[cowpoos]

I have been speaking to a mate of myne who is a auto Electricion (SP)
and he was saying that a 4 cylinder gauge will read double the reading so at 2000 revs the gauge will be reaidng 4000 and so on he said you could make a new face for it but I dont really want to do that thats why I was looking for a gauge that is designed for 2 cylinders
Thanks Bungbung for showing me that link.

After talking to Phil I think I will try find a RGV250 gauge for it
well...your auto electrician mate is full of crap...and if he really is a auto electrcian...he would have told you to wire 2 resitors of equal value in series [basic basic too do]..on the input line and that would halve the signal.....


Now back why it works...crank sensor sends a signal every reveloution...no matter what configuration engine it is...it will still read the same!!!!!!

Now give me your auto electrician mates phone numbe...and I'll ring him up and explain this simple theory to him...and I promise I'll talk really slow so he gets it!!!

[pete376403]

I think the automotive tachs use a pickup on a spark plug lead. Selecting the right number of cylinders will allow the tach to calculate the correct reading.
If they did use a crank pickup the number of cylinders would be irrelevant

[bungbung]

I think the automotive tachs use a pickup on a spark plug lead. Selecting the right number of cylinders will allow the tach to calculate the correct reading.
If they did use a crank pickup the number of cylinders would be irrelevant

Almost. The pick up is on the LT side of the coil, so for a 6 cyl there will be 6 pulses every two revolutions. If the pickup was on the plug lead the reading would be 1 pulse per two revolutions.

Gets complicated on a wasted spark set up. The digital tach in my link allows the choice of two stroke/four stroke and 1, 2, 3 or 4 cylinders.

[Ivan]

well...your auto electrician mate is full of crap...and if he really is a auto electrcian...he would have told you to wire 2 resitors of equal value in series [basic basic too do]..on the input line and that would halve the signal.....


Now back why it works...crank sensor sends a signal every reveloution...no matter what configuration engine it is...it will still read the same!!!!!!

Now give me your auto electrician mates phone numbe...and I'll ring him up and explain this simple theory to him...and I promise I'll talk really slow so he gets it!!!


:Offtopic:Damn this website always gets into this people going off at a simple question.

I think when he has the Quals and certs and has been involved in making a electric car I think he knows what he is on about.

The Wires that run on a auto tach dont run off the crank sensor they run of the Negative side of the coil. :done:

[cowpoos]

:Offtopic:Damn this website always gets into this people going off at a simple question.

I think when he has the Quals and certs and has been involved in making a electric car I think he knows what he is on about.

The Wires that run on a auto tach dont run off the crank sensor they run of the Negative side of the coil. :done:


Well he's still is a dumb shit..and I still back my offer to call and explain to him!!

if its run off the coil...its still not a problem...crank turns twice every time the spark fires per cylinder.