ESE's works engine tuner

[husaberg]

Greg is not being ironic...greg is being literal.

Convince me that Ethanol in E10 is not (a) Alcohol....and (b) an additive to the base petrol...

Given that this is NZ and we only pay lip service to the FIM there's no requirement for us to try and match the FIM unleaded fuel composition - and a lot of very good reasons why our fuel regs should be based on what is actually on sale here...

A couple of years back the word was that E85 was going to replace avgas at least at the pumps at Ruapuna. I was told that most of the car formulae were going to run on it and that avgas as a race fuel would be phased out in NZ....hasn't happened due I believe to shortage of supply but it still could as the decision was based on what seem sound principles.

http://www.gull.co.nz/fuel-products/
http://www.gull.co.nz/assets/Uploads/Gull-Force-10.pdf
its not an additive, because that is how it is sold from the pump.
i agree with the relevance in regards to F4 and F5 but the fuel regs missed them. big surprise which is also ironic.
http://www.mnz.co.nz/regulations/rules/general-rules
F4 and F5 must conform to 10.17.1 which is the AVgas or FIM unleaded.
As Ethanol is not listed ad being a component of the FIM unleaded Fuel even though the rest of the ingredients are fine.

So Greg you Are right the FIM fuel Fuel that covers F4 and F5 plus the other classes not listed under 10-17.2 and 10.17.3 .................

[Ocean1]

Given that this is NZ and we only pay lip service to the FIM there's no requirement for us to try and match the FIM unleaded fuel composition - and a lot of very good reasons why our fuel regs should be based on what is actually on sale here...

I blame Helen Clarke. Was her that drove the compulsary biofuels content goals for our domestic supply. Trouble is she didn't change the rules to allow biofuels to be profitably made here, so the mandatory biofuel content for NZ is mostly imported from Au. Who import the raw materials from NZ.

[F5 Dave]

....The remedy if you think you need one is to put up a remit specifying that any fuel commercially available for road use is acceptable for miniature road racing.....

and Av gas, as many are using it. No additives allowed. . .except 2 stroke oil.

[wobbly]

The way I read the rules, would in fact allow VP - C12 to be used in Post Classic and Superlight for example as all its specs are within the limits of "AvGas ".
If you wanted the last ounce of performance and were happy to pay 4 times the rate at the local airport.

[jasonu]

The remedy if you think you need one is to put up a remit specifying that any fuel commercially available for road use is acceptable for miniature road racing....sidesteps the fuel specifications and keeps the rule current.

....

Or just say fuck 'em and run the pump gas of your choice.

That is (the inverse) what I did in the good ol' 90's when they started selling petrol imported from (I think) Singapore. Some may remember it caused 4 out of 5 Cortinas to catch fire because it ate old fuel lines. For one reason or another my bike ran like shit on it so I started using not Bucket legal Av gas instead. The bike didn't seam to run any better than before the petrol change and I let everyone know what I was doing.
Don't forget, Buckets is self policeing so if someone had an issue with you using the 'illegal' pump gas you should be able to settle it over a brew or two.

[F5 Dave]

My 50 ran great on the old 96 leaded, but dreadful on the new gas as described. Changed to Av & restored most of the power, but it wasn't as good as what I was using before at least for my engine. I tried pissing around with 1/2doz different head shapes & volumes, tuning for each but had no real improvement. Av is stable though & best of a bad lot.

[Grumph]

Or just say fuck 'em and run the pump gas of your choice.

That is (the inverse) what I did in the good ol' 90's when they started selling petrol imported from (I think) Singapore. Some may remember it caused 4 out of 5 Cortinas to catch fire because it ate old fuel lines. For one reason or another my bike ran like shit on it so I started using not Bucket legal Av gas instead. The bike didn't seam to run any better than before the petrol change and I let everyone know what I was doing.
Don't forget, Buckets is self policeing so if someone had an issue with you using the 'illegal' pump gas you should be able to settle it over a brew or two.

Fair enough - and i don't disagree....But i'd point out that the bucket GP is usually held at a National round or the equivalent so there is likely to be fuel testing given that it's become a pressing question...Also, if it's an MNZ permited meeting, fuel testing can be done at random....Just pointing out the obvious....

[jasonu]

Fair enough - and i don't disagree....But i'd point out that the bucket GP is usually held at a National round or the equivalent so there is likely to be fuel testing given that it's become a pressing question...Also, if it's an MNZ permited meeting, fuel testing can be done at random....Just pointing out the obvious....

Yeah fair enough. Better safe than sorry maybe.

[TZ350]

Wobbly put me onto this TPS, I think its from a Aprilia RS250

Attachment 258168 Attachment 258169

Posted because someone asked about them.



This is a car TPS from a fuel injection throttle body. It has a spring return and looks like it could easily be fitted with a bracket for a throttle cable.

the Aprilia TPS is in the top middle of the picture.

The unit I currently use with the Ignitec is from an Aprilia and I think 5k Ohm but the cable box is very bulky.

If I was putting together another TPS system I would look at ones from cars but you have to be careful as they vary in their resistance, I have seen 5k to 25k units so when you go to Pick a Part take a multi meter with you. There will be three pins, and for an Ignitec you want 5k between two pins, they are usually the outside pins with the central pin as the variable resistance.



This is one of the ND W31ES-G plugs, unfortunately not the resistor type, but if I ever find a use for them I have plenty. I was thinking of trying to cut the earth electrode into different shapes on the tip and try out the Taper Tip, V Notch and Cut Back to the center of the central electrode ideas that you see on some other plugs.

[TZ350]

... weld a threaded alloy bung onto the head ( you could even machine a couple of fins into it ) to enable use of 3/4 reach race plugs ...

Thanks for the idea Wob.

[wobbly]

The Ignitech doesnt give a shit what TPS resistance is used.
It supplies 5V and the variable pot wiper reads the value of the resistance from 0 to 5000 mV on the servo screen..
The middle of a 5K pot will give 2500 mV, just as a 25K pot will.

[Bert]

Sitting around tonight having beers and we were wandering what the final result to the poll?

Griffiths boy said they had 3l of fuel on board the sidecar....

[TZ350]

The middle of a 5K pot will give 2500 mV, just as a 25K pot will.

Almost true in theory ... but its not as simple as a series resistance voltage divider problem.



Because you have overlooked the question of how much current is needed to support the variable voltage seen at the TPS's wiper, and the current passing through a 25k pot is 5 times less than through a 5k one.

To realy know, we would need more information about the current drawn by the Ignitecs input, as it can't be nothing, (Gods law) physics says it must be something and the higher the TPS's resistance is, any current drawn by the Ignitec's input however small will have a greater distorting effect on the voltage picture at the wiper of a 25k TPS than a 5k one.

Checkout Series Parallel Circuit theory.

The TPS is two resistances in series R1 and R2 and the Ignitecs input is a resistance R3 in parallel with R2, so its a series/parallel problem and the voltage measured at point 2 with a 25k pot in the middle of its stroke will not be the same as a 5k one, in fact it could be much less.



I remember having trouble, maybe it was me maybe it was the pot maybe the Ignitec does not like 25k and flashed up an error message.

I could not find any guidelines from Ignitec and was having to figure it out for myself.

In the end I found that the 5k TPS worked OK on my setup and I can recommend it.

Next time I get a chance I will try the 25k one again and pay more attention to why it did not seem to work for me.

[TZ350]

Sitting around tonight having beers and we were wandering what the final result to the poll? Griffiths boy said they had 3l of fuel on board the sidecar....

Taking the average of both sides, it was evenly split, 50% thought the Beast was heavier than the sidecar which is a pretty big vote of confidence in the Griffiths brothers engineering. I only feel slightly miffed.

[Henk]

Taking the average of both sides, it was evenly split, 50% thought the Beast was heavier than the sidecar which was a pretty big vote of confidence in the Griffiths brothers engineering. I only feel slightly miffed.

Our sidecar was 10kg heavier than the Griffiths chair, swingers about the same, riders we made our 10kg back with interest