I placed mine 110mm from the front of the skirt. Running unleaded it is bloody hard to do plug readings. Well, I fid it hard anyway compared to leaded fuel.
Mine is peaking at 1100deg F, sometimes jumps up to 1150 as I close the throttle. It feels fine tho, but I wouldnt go any leaner...
I am also interested in this information. Could you show us a photo of your installation please Simon? _________________ After years of moaning about immigrants now i am one...
Will do. Information was from Matt @ Tyga as I use his chambers. He recommended between 100 and 125mm from the edge of the piston and set his to in the middle - 112mm. The Koso guide specified a similar distance.
I think that going wildly away from these will result in quite different reading with pressure waves, etc, but I am no expert.
On the subject of jetting, I thought that I may have too large a main as it is larger than the norm. I know that we cannot talk sizes, but it is in the region of 200. However the EGT temp suggests that it is bang on.
I went for a quick blast down the road and found out that this EGT is very usefull ! It showed me that i was 1 jet on the lean side when i thought before that i was spot on .
Definetly worth buying one !
When you ride along a decent stretch of road and are wide open , the sensor shows the gas temp . Anything over 1200 deg faronheight is danger and you need to increase your main jet size
Good to hear. Did you buy the Koso Dual and mount it the same distance from the piston as I did? Mine is peaking at 1250 deg - wouldnt want any leaner I think..
Watch the EGT rise. If it peaks and then starts to fall again while on WOT then the chances are that you're starting to detonate. This is due to the detonation causing the combustion chamber temp to rise, but the exhaust gas temp to drop.....dangerous and will result in damage.
If you're up to 1250 degrees then you're pretty close to ideal, but if you intend to do lots of flat out riding then I'd be tempted to throw some bigger brass in there to drop the temp 50 degrees. This might knock off half a pony, but it'll keep that half a pony less for longer.
Messing with the ignition timing can change your EGT. More retard will heat up the combustion chamber later, so less heat is lost to the cooling system and more heat escapes into the pipe, so EGT will rise. More advance does the opposite, with more heat being lost to the cooling system before it exits the exhaust port, so EGT will drop.
With respect to the amount of gasolin coming through the carburetor(), is it just a matter of, the leaner the hotter or are there any subtle indications there as well ? _________________ Poul
"If Life Gets Boring, Risk It!"
MC21SE, KISS box
MC21SP, HRC box, racing loom
Yes, mine reads a bit over 1200, what seems to happen is that it spikes up briefly as I close the throttle from WOT and then comes back down again. I am running mains that are much larger than others have posted, thankfully the EGT kept me in check. Seat of the pants suggested that it was pretty spot on as well.
No, not yet,as I havent ridden it. I had an issue with the regulator, purchased a blackbird one, straight out of HK for US$20. Works okay now.
Can you please PM me about chambers? There are a couple of 300s here in NZ, and perhaps get your guy to talk with Wobbly about some chambers that are specifically designed for the 300 rather than the 250. Of course, I would love for Tyga to make some! The standard Tyga ones seem to run out of puff
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), is it just a matter of, the leaner the hotter or are there any subtle indications there as well ?