Temp of HT's

[Fabian]

There was virtually no (peak power) performance gain with the Jaguar CDI, though there's been a significant increase in big end connecting road bearing life with the Jaguar CDI, which is what you would expect a proper 2-stroke ignition curve to achieve.

Firstly, i want a reliable engine,
Secondly, i want a reliable engine,
Thirdly, i want a reliable engine,

With the Jaguar CDI, i have a mechanically reliable engine.


If you want quick and easy way of gaining more "usable" performance, get a Rock Solid Engines, Reed Valve Intake.
It (in my experience) won't give you more peak power but it will noticeably improve bottom and mid range torque, allowing you to go the same speed, using less revs and generally have a more muscular power delivery, not to mention a great reduction in noise coming from the air filter.


Ultimately, if wanting "more power" the only real (and reliable) option is a "Morini Engine" - you're just wasting time and money on a Chinese engine, trying to significantly improve it's power output.

Morini Engine: http://www.morinifrancousa.com/engines.htm

 

[geebt48cc]

No, I believe everything you are saying. Fabian, the"Morini" is something else. RELIABLE is just what I'm after. True, we are still talking china stuff here, but time will tell. Just was wondering if you noticed anymore torque or heat relief?

Thanks

 

[Fabian]

With or without the Jag CDI, the Exhaust Temperature Gauge showed no noticeable difference in temperature.
I also didn't notice any meaningful increase in torque with the Jaguar CDI compared to a standard CDI - all the extra low and midrange torque came from the Rock Solid Engines Reed valve Intake.

Another trick to improve the power curve of the HT engine is piston ramps. I'll send you a PM on how it's done and why it works.

 

[geebt48cc]

Wow, I've not seen the piston itself ramped, just some work on the jug itself. Well, I'm playing the waiting game for my new Jag CDI. No, Fabian, I know that these little engines are only able to put out so much power. I just hope that ordering the Jag CDI for $88 dollars will be worth it on a $160.00 Skyhawk 66cc kit? I really don't push the engine over mid twenties, but will run on flat 30+. Considering I'm a big guy at 6' 6", 260, everything we've talked about helps. Living in SW Va. with a fair share of hills, general power does help. I know that we are talking about small cc's here on just bicycles, but I just want it to run the best it can. (lol, even though it's made in china)

Anyway, it's synthetic/castor at 25:1 with 600 miles sense new. Hope that this new CDI will at least give it another 600 miles of service. Fabian, when it had right at 300 miles, I milled head, and just removed head gasket. That really helped overall with also extending the intake on carb 7". Torque really jumped up. This new Jag CDI should not only help wrist pin bearing to live, but also smoother, and easier starts.

Fabian, what was the main thing that you noticed that the Jag CDI did to your bike?


Appreciate you sending the link.

Glen

 

[Fabian]

After an initial test run, i decided to increase the ignition curve to the maximum by removing "all" jumpers. It must be noted that my engine doesn't require any of the lower advance curves because it's using the standard, low compression cylinder head - the performance seemed to increase (on my engine) using the maximum setting over the factory installed setting.
Having said that, you may need a different setting if running a high compression cylinder head without a head gasket or other performance modifications.

My first trip with the Jaguar CDI fitted gave me the impression of a more gentle level of vibration - the engine almost felt like it had less power but the speedo showed no loss of speed travelling over identical routes and inclines. The actual performance remained the same - in my case there was no discernible power gain or power loss but it was a more enjoyable riding experience with reduced vibration coming from the engine.

I'm positive that your engine will have good reliability and reasonable life if it's fitted with a crowded needle roller big end, as well as the Jaguar CDI and 25:1 oil/fuel ratio.
Installing a Rock Solid Reed Valve Intake will also help as there is much less need to excessively rev the engine to make usable power.
With the reed valve intake and the Jaguar CDI, little is gained by going over 5,000 rpm, which contributes to engine life and reliability.

This combination (and piston ramps) gives the engine enough torque that excessive revs are not needed.

 

[Waxxumus]

Mine has been running 1400 km on stock cdi.
What about your engines makes them keep dieing?
Do you run WOT the whole time?

 

[Waxxumus]

25:1 what?!?!

 

[crassius]

2012 thread

 

[butre]

Mine has been running 1400 km on stock cdi.
What about your engines makes them keep dieing?
Do you run WOT the whole time?

he runs up hills overloaded and kills bottom end bearings. the rest of us are breaking the cages on the top end. it's why I use a bronze bushing in the top, so when I inevitably destroy it I don't ruin my expensive CNC machined head and jug that I put a ton of hours into

 

[Deleted member 12676]

see http://www.dragonfly75.com/motorbike/headtemp.html for my info on head temps.