ESE's works engine tuner

[speedpro]

Attachment 235788

Instead of a Pit Bike rectifier/regulator and being stuck with 12Volts, by changing the Zenor diode this could be adapted for working with those 14.5Volt electric drill batteries.

The good old 2N3055. What can't be made with them? There should be a 6' high bronze one somewhere in the world, heated to about 200deg, just to make it as lifelike as possible.

[bucketracer]

The finned reg/rec in the pic previously is the same one I use and the factory say its rated to shunt to ground the whole output from my 8 pole, that puts out 30 V and 8A fully loaded.

The Pit Bike rectifier/regulator cost $15 of Trademe, the Red wire is battery positive, Green is Earth, Violet and Pink are Generator AC. A little bit on AC/DC http://www.kpsec.freeuk.com/powersup.htm

A picture of the rectifier/regulator TeeZee's using.........

Be careful with the charge voltage to the 14.5V batterys as I believe you need at least 1.2 or 1.5V above the nominal battery rating to get it to charge.

That is why most reg/rect run at 14.2V - for a 12V battery, and you will start getting a yellow error highlight in the Ignitech screen over 15V.

Then to avoid over voltage on the IgniTech it might be possible to build a 15Vdc Voltage maintenance generator for supporting but not recharging a 14.5V battery drill battery. That way a lot of the running power is supplied by the generator and the battery is there for starting and slow running, but has to be re-charged between race days.

[TZ350]

Interesting posts about voltages etc for the generators, thanks, some good ideas there and I feel pretty confident now about us having another go at NedKellys generator and the four pole one for myself.



These lead-acid-gel batteries seem to work well in the Honda 125T's and other 4-Strokes at Mt Welly, but we had nothing but failures with them.

Often a brand new one would crap out quickly during the day, when at 7Amp Hours it should have lasted all day.

When we got them home they would be completely dead and unable to be re-charged, so had broken down inside somehow. Maybe it was something to do with the 2-Strokers vibration. Don't know for sure, but that is the reason we went to 14,5V battery drill batteries.

Does any one know of a better style of 12V battery to use?

[Yow Ling]

Interesting posts about voltages etc for the generators, thanks, some good ideas there and I feel pretty confident now about us having another go at NedKellys generator and the four pole one for myself.



These lead-acid-gel batteries seem to work well in the Honda 125T's and other 4-Strokes at Mt Welly, but we had nothing but failures with them.

Often a brand new one would crap out quickly during the day, when at 7Amp Hours it should have lasted all day.

When we got them home they would be completely dead and unable to be re-charged, so had broken down inside somehow. Maybe it was something to do with the 2-Strokers vibration. Don't know for sure, but that is the reason we went to 14,5V battery drill batteries.

Does any one know of a better style of 12V battery to use?

I have had a few problems with gel cells too, seem to be affected by vibration, hard to go past a sealed lead acid battery if this is the case. If you could isolate the gel cell from the vibration you would do better.

[Kickaha]

Maybe it was something to do with the 2-Strokers vibration.

I have had a few problems with gel cells too, seem to be affected by vibration

Vibration kills batteries, although if the batter box is either rubber mounted or has enough room to fit something inside it to isolate the battery from vibration it normally fixes the problem

Way back in medieval bucket racing times (pre FXR) we saw a few problems using gel cell when they weren't isolated from vibration

I didn't ever have a problem using a standard lead/acid but there are far better options than those available now

[ac3_snow]

the club bike (slightly different as its a FXR) has the battery mounted on a decent sized chunk of foam and held in place with a rubber strap, I initially thought it was just to stop it rattling around but would kill any vibration rather effectively too.

[ajturbo]

these seam to work ok in my GT125twin...

[Moooools]

Interesting posts about voltages etc for the generators, thanks, some good ideas there and I feel pretty confident now about us having another go at NedKellys generator and the four pole one for myself.



These lead-acid-gel batteries seem to work well in the Honda 125T's and other 4-Strokes at Mt Welly, but we had nothing but failures with them.

Often a brand new one would crap out quickly during the day, when at 7Amp Hours it should have lasted all day.

When we got them home they would be completely dead and unable to be re-charged, so had broken down inside somehow. Maybe it was something to do with the 2-Strokers vibration. Don't know for sure, but that is the reason we went to 14,5V battery drill batteries.

Does any one know of a better style of 12V battery to use?

3 cell Lithium Polymer batteries (11.1 volts discharged. 12.'something' charged.) Cheap as chips from Hobbyking and weigh bugger all. Would have no problem with vibration (made for rc vehicles)
However you would be hard pushed to find one at 7AH, they require a special charger and have a bad habit of exploding if charged wrong.

Perhaps 3 of these?:
http://www.hobbyking.com/hobbyking/s...idProduct=8932
And change when necessary.

And a charger:
http://www.hobbyking.com/hobbyking/s...idProduct=8247

Shipping might bite yah...

Just a thought really.
I going to try this out to run my shift light. I found four 1AH versions still in their box on a shelf from a forgotten project.

[TZ350]

Thanks for the tip Moooools ......... But.....

Lithium cells must be charged very differently than NiCad or NiMH. They require a special charger specifically designed to charge lithium cells. Failure to do this can cause the battery to spew violent flames. There have been many fires directly caused by lithium batteries. PLEASE BE RESPONSIBLE when charging lithium batteries.

http://www.rcgroups.com/forums/showthread.php?t=209187

I might be better sticking with something simpler........ still I like a challange.

[Kickaha]

Lithium cells must be charged very differently than NiCad or NiMH. They require a special charger specifically designed to charge lithium cells. Failure to do this can cause the battery to spew violent flames. There have been many fires directly caused by lithium batteries. PLEASE BE RESPONSIBLE when charging lithium batteries.

Do a search for Shorai Lithium, there is a thread about them on KB, don't need a special charger and don't tend to catch fire

[speedpro]

I always thought Li batteries had circuits built in to balance the voltage of the cells and to monitor battery temp and charge and discharge rates. You most certainly cannot just plug them in to some power supply and walk away.

[TZ350]

Do a search for Shorai Lithium, there is a thread about them on KB, don't need a special charger and don't tend to catch fire

Here we go, the start of the thread ............ thanks

These look really impressive!

Massive weight saving too, as all models are well under 1kg. Only 2 different case sizes though, but they supply special packing material for fitting.

http://www.shoraipower.com/default.aspx

Who's going to be first to import one?

[jasonu]

3 cell Lithium Polymer batteries (11.1 volts

Just a thought really.
I going to try this out to run my shift light. I found four 1AH versions still in their box on a shelf from a forgotten project.

You have a shift light on your bucket???

[Moooools]

Thanks for the tip Moooools ......... But.....

Lithium cells must be charged very differently than NiCad or NiMH. They require a special charger specifically designed to charge lithium cells. Failure to do this can cause the battery to spew violent flames. There have been many fires directly caused by lithium batteries. PLEASE BE RESPONSIBLE when charging lithium batteries.

http://www.rcgroups.com/forums/showthread.php?t=209187

I might be better sticking with something simpler........ still I like a challange.

Meh. So long as you use the correct charger, such as the one I linked, you probably wouldn't have any problems. They aren't particularly perfect for the application on that front though.

I have only had two explode violently. (But that was when someone decided to secure them in a box with expanding foam)...

[Moooools]

You have a shift light on your bucket???

Ahhhhhhhhhhh yeeesss. Would you find it less ridiculous if I told you it was an in-helmet shift light?