What did you do today? Cobba's rebuild

[cobbadiggabuddyblooo]

https://www.bp.com/content/dam/bp-count ... petrol.pdf

http://www.autospeed.com/cms/article.ht ... t&A=109132

https://www.princeton.edu/ssp/64-tiger- ... pdated.pdf

Work in progress and more time up my sleeve again next year so time to make more progressions on extracting further power after a 12 mth back to school year...

Interesting reading on different types of race fuels, oxygenated fuels like your ethanol blends and so much more...
Why did you put that can of Elf up there Rod....lol
Now it's not a street bike I can un factor in my bad servo fuel ping factor...lol
I can see the potential for for a healthy 4 or 5 extra HP...
Time to pull that paperwork on a DIY knock sensor for tuning....

Found some suppliers local to me too...

Oxygenated
http://powerplusfuel.com.au/web/dyn_in/ ... 16_100.pdf

You can see the impact on stoimetric A/F ratios due to oxygenation %.
This will give you an idea on equating the larger jetting needs.

homologated fuel (interesting what this means to keep it available to plebs like me )
http://powerplusfuel.com.au/web/dyn_in/ ... 016_99.pdf

This link is good to see the oxygen weight% to see the basics on Oxygenated and non oxy fuels

http://www.insingerperformance.com/prod ... ded-fuels/

[dandywarhol]

Have you looked into the spec/cost of AVGAS at your local airport?

[cobbadiggabuddyblooo]

I looked at the properties of AVGAS
http://www.clubdbsa.org/forums/showthre ... e-hard-way!

You need to produce a race licence and by law the AVGAS will need to be sold in a sealed container so the price of a race licence alone will pay for an kit to run oxygenated fuels.

E85 looks interesting as an option but I'd have to rekit the rubber components like hoses and carby seals, o rings to suit.
Fuel pump may not cut the mustard too.
I'll be happy with a conservitave 10% gain on E85 plus the bonus of a cooler burn to keep engine temps a little lower. It's up around 105-07 RON

Stoimetric is 9.7:1 so I'll need some 230- 250ish main jets

I'd be getting close to the threshold of the crank by then plus the consistency of E85 is questionable from 1 supplier to the next..
The penrite racing 3 fully synth oil can cope with E85 too that I use.

There is a lot to factor in on changing fuel and for a bike that may only be used a couple of times each yr a 19L drum of race fuel at $85 will get me close to 2 track days and the simplest way to go about things.

http://hioctaneracing.com/blog/2011/7/3 ... -fuel.html

[cobbadiggabuddyblooo]

This I found interesting while researching about plugs and resistors but I'll add this link now after helping Uday who suffered this exact problem...
Brand new plugs flooded a number of times and then problematic with spark finding the shortest path via the build up of contaminates.
Plugs are no longer manufactured with a glazing coat on the spark plug porcelain since fuel injection/ECU driven fuel metering to help eliminate flooding. (cost cutting measure no doubt)

http://www.gsparkplug.com/shop/fouling- ... on-vs-ngk/

https://bobistheoilguy.com/forums/ubbth ... _out_myste

[coxylaad]

just for your information, the HT leads on my tdm setup were proper steel not carbon string, so there were no resistance in those.
The plug caps are also different, but I never took those apart so cant say whether or not they have resisitance in them.

[Racer-unk]

So is it safe to say: Use a 5K cap with a non-resistor plug, or use a 1K Racing cap with a Resistor type plug.

[cobbadiggabuddyblooo]

All I'll say is I'm going with the 5k resistor plugs only...

[dandywarhol]

just for your information, the HT leads on my tdm setup were proper steel not carbon string, so there were no resistance in those.
The plug caps are also different, but I never took those apart so cant say whether or not they have resisitance in them.

All TDM/TRX coil leads are steel cored. Carbon leads went out with Ford Sierras The resistances are in the caps and plugs themselves.

[dandywarhol]

I looked at the properties of AVGAS
http://www.clubdbsa.org/forums/showthre ... e-hard-way!

You need to produce a race licence and by law the AVGAS will need to be sold in a sealed container so the price of a race licence alone will pay for an kit to run oxygenated fuels.

E85 looks interesting as an option but I'd have to rekit the rubber components like hoses and carby seals, o rings to suit.
Fuel pump may not cut the mustard too.
I'll be happy with a conservitave 10% gain on E85 plus the bonus of a cooler burn to keep engine temps a little lower. It's up around 105-07 RON

Stoimetric is 9.7:1 so I'll need some 230- 250ish main jets

I'd be getting close to the threshold of the crank by then plus the consistency of E85 is questionable from 1 supplier to the next..
The penrite racing 3 fully synth oil can cope with E85 too that I use.

There is a lot to factor in on changing fuel and for a bike that may only be used a couple of times each yr a 19L drum of race fuel at $85 will get me close to 2 track days and the simplest way to go about things.

http://hioctaneracing.com/blog/2011/7/3 ... -fuel.html

I'm lucky I can just turn up at the local airfield and fill my 20l can. Costs about 25% more than super unleaded

[cobbadiggabuddyblooo]

Tinkering and timing tools
Looked into options like EGT gauge too and obviously what the 2 small bungs are for on the std TRX headers..(more so for emission testing)

Food for thought on knock sensor mounting...

Also that when mounted mid cylinder, its like putting a microphone along theside of an empty metal can so all the noise in it echos and is amplified byt the structure of the engine. If it weren't for the intermediate shaft for the left CV my KS would still be mounted right there in the hold behind the AC bracket where the intermediate shaft for the CV bolts up.

now that i've moved it back up to the OEM location i pick up so much more false/phantom kock that it drives me nuts...

i guess to re-idderate as to why the main journal plane is supposedly the best is that detonation is a masive pressure wave/pressure increase and is like hammeriung the top of the piston with, well, a hammer, so the energy/vibration naturally travels through the solid metal rod to the crank, to main jounal etc.. a lot better and more accurately than through empty space and water filled areas of the block and other such things between the OEM ks and where the detonation is making it's most impact.

I wonder if I could pick up a signal from the LH end of the crank???
Unscrew the centre bung in the Alt case but there may be too much electrical interference ????

To be or not to be..
Strain gauge or accelerometer
That is the question...


DETONATION RESONANT FREQUENCY

= 900
--------------
3.14 X cylinder radius

= 6.3 K

Take a RPM, TPS, A/F and knock sensor feed...
I wonder if I can run the knock sensor via the oil temp feed onto the digital Koso dash ???
Knock link looks interesting set up with LEDs bandwidth filtered 6k to 6.5k with a 6db slope / oct either side

file:///C:/Program%20Files%20(x86)/LogWorks3/LogWorks3_Manual.pdf

[cobbadiggabuddyblooo]

https://www.youtube.com/watch?v=7w_uf8T5vHI

[cobbadiggabuddyblooo]

https://m.youtube.com/watch?v=BwTGeKj1oHE

Ulf Penner who supplied the camshafts

[dandywarhol]

https://m.youtube.com/watch?v=BwTGeKj1oHE

Ulf Penner who supplied the camshafts

Surely a suspension geometry problem on that one - lot of chassis lift under torque Rear suspension too long or wrong size dogbones?

[cobbadiggabuddyblooo]

Maybe due to the Front wheel being clamped in the dyno so doesn't really give a true value of weight transferral and inertia exerted???

[cobbadiggabuddyblooo]

Looked into plug technology of late.
Heat range is pretty self explanatory but 1 thing I found interesting was the thermal conductivity.
You every day standard copper core spark plug is 2.5 more times better at conducting the heat away than an Iridium so with raised compression this could impact on detonation when under constant load.
Your multi earth strap style plug was old technology at keeping the plug clean but at the detriment of a full flame kernel to burn your fuel mixture.

Side gapping your std plug is another option which unshrouds the spark but remember to close the gap by 0.010"

I compared a few iridium plugs I had too and noticed the difference between the NGK and Denso iridium plugs. Denso has a much finer tip which should in theory be a little more benificial.


https://m.youtube.com/watch?v=dgFVN9iMnLg

https://m.youtube.com/watch?v=53yfHLdn41k

http://www.turbododge.com/forums/f4/f62 ... ics/975890

https://www.google.com.au/search?client ... m5aJmoyEsM:

Comprehensive plug info

http://brianesser.com/technical-informa ... ark-plugs/