ESE's works engine tuner

[husaberg]

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F4 and F5 Miniature Road Racing. (Buckets)

MNZ Rules. (Motorcycling New Zealand)

Appendix W - Minature Road Race https://mnz.co.nz/wp-content/uploads...Appendix-W.pdf

Appendix A - Championship classes https://mnz.co.nz/wp-content/uploads...Appendix-A.pdf

Appendix X - Technical https://mnz.co.nz/wp-content/uploads...l-Appendix.pdf

Fuel is covered in Technical 12 and Nitro in Technical 12e. So Pump gas and/or Av gas for F4 F5 and not Ethanol, Methanol or Nitro. Total party poopers.

Appendix D - Fuel specifications https://mnz.co.nz/wp-content/uploads...Appendix-D.pdf

I don't think i will ever understand the MNZ thought process.
they have classic classes but change the capacity to be outside of what was in the rules in those eras.
like allowing GP 250cc 2 stokes in F3 when the periods only allowed 125cc.
For f1 there is no allowance for 4t twins vs 4t 4's so its 1300cc 4's against 1300cc twins when thse era rules were 750cc 4 's vs 1000 twins

[lodgernz]

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F4 and F5 Miniature Road Racing. (Buckets)
Fuel is covered in Technical 12 and Nitro in Technical 12e. So Pump gas and/or Av gas for F4 F5 and not Ethanol, Methanol or Nitro. Total party poopers.
Appendix D - Fuel specifications https://mnz.co.nz/wp-content/uploads...Appendix-D.pdf

Rob, where does it say that ethanol is not allowed for buckets?

[TZ350]

Rob, where does it say that ethanol is not allowed for buckets?

Good question, I may be wrong but I thought the specs (Appendix D) specified the amount of Ethanol permitted in petrol. So Ethanol at 100% is not permitted. Best fact check me about this.

Persionaly I would be happy with no fuel restrictions at all for Buckets.

[husaberg]

Rob, where does it say that ethanol is not allowed for buckets?

Good question, I may be wrong but I thought the specs (Appendix D) specified the amount of Ethanol permitted in petrol. So Ethanol at 100% is not permitted. Best fact check me about this.

Persionaly I would be happy with no fuel restrictions at all for Buckets.

Pump gas max 10% Ethanol is specified.

[jamathi]

When I read my copy of Jan Thiel's Book he hinted it was hard to work with the Italilans. But I now understand he was playing it down.

I ALWAYS worked very well with the Italians, except rumi, who was a real piece of SHIT..... and the most dishonest person I ever met..........

[Flettner]

No, rules say the maxim amount of ethanol in unleaded petrol is 10%.
It is there for allowed to run 85% ethanol in 15% LEADED petrol.
Ethanol is not banned outright, as I was led to believe, although methanol is.

[Frits Overmars]

Persionaly I would be happy with no fuel restrictions at all for Buckes.

Personally I think the less restrictions the better. But what if someone discovers a fuel that delivers 5% more power and costs 500% more than regular petrol? In the end everybody who does not want to be left behind has the same power again but now everybody has to pay five times the price. A fuel rule can protect you from situations like this.

Having said that, I am a huge fan of E85: more power than just about every racing gasoline I know of and at the same time easier on the engine and cheaper than regular petrol.
Too bad you seem to have to mix it with leaded fuel, which I detest.

[Rudex]

Yes, the Modena KK1 is very interesting. But it's only used on the reed valve and intake ports, not around the crankshaft. I always wonder if it would provide more power, at least noticeably.

Frits friend Roland Holzner when he designed the Modena KZ engine, engineered a " plastic " insert that completely lined the intake surfaces from the reed block mount face , all
the way thru the case up to the Transfer duct entries.
Thus the inducted A/F never actually contacted the hotter metal, except down the sides of the crank.
It somehow got through the CIK tech inspection of the 50 units for homologation, but quickly the CIK banned it from any future engines.

EDIT - easily replicated using 3D printed fuel resistant polymers.

The ceramic coatings I have used were developed to prevent heat from migrating through to the metal substrate - I have not had a look or had any experience with coatings that do the reverse
ie ,preventing heat from migrating from the substrate out to the coatings surface - mind you, the coating used on the inside of 4T headers is so effective the pipes are only warm to the touch on the outside at idle.

[Flettner]

Personally I think the less restrictions the better. But what if someone discovers a fuel that delivers 5% more power and costs 500% more than regular petrol? In the end everybody who does not want to be left behind has the same power again but now everybody has to pay five times the price. A fuel rule can protect you from situations like this.

Having said that, I am a huge fan of E85: more power than just about every racing gasoline I know of and at the same time easier on the engine and cheaper than regular petrol.
Too bad you seem to have to mix it with leaded fuel, which I detest.

I also detest leaded fuel.
Unfortunately this is how the rules are written, the wording will be changed presently I'm sure.
I ask, when the fuel rules are changed, let E85 be allowed for 100 fourstroke supercharged, like it used to be.
Continue the ban on methanol and I'd be all for a ban on leaded fuel also, outright.

[katinas]

Having said that, I am a huge fan of E85: more power than just about every racing gasoline I know of and at the same time easier on the engine and cheaper than regular petrol.

Yes, absolutely agree about E85. Apart more power, you can adjust bike all day in exhaust fumes and still feel good.

More power not only with a two strokes. I've tried E85 on 4t Yamaha R6, VFR 750 (RC24 RC36), VFR 800 and Suzuki GSX 400 Bandit. With the right adjustments all goes faster.
Yamaha R6 2003 original injectors for gasoline has 4 holes, but with E85 real difference in power comes with 12 holes injectors from Mitsubishi Lancer 2. (shape is the same like on R6 2003). Injectors with 6 and 8 holes from 1300cc bikes still too lean.

But, as many time was discuses, E85 does not mix with fully synthetic racing oils. I haven't found a single that will mix without separation. Add photo with just few of them. The worst was autolube oil, separate after few minutes.
All castor base oils I've tried mixed very well with E85. The only exception Castrol A747, separation not as clear like with the fully synthetic, but it seems that 747 synthetic additives insoluble in ethanol.
And vice versa, only few castor base oils mix with usual gasoline.

[diesel pig]

I ALWAYS worked very well with the Italians, except rumi, who was a real piece of SHIT..... and the most dishonest person I ever met..........

My Apologies, The dangers of trying to read between the lines.

[diesel pig]

I have ever had anything to do with E85, so don't have a opinion on it. But the little I have had to do with methanol makes me think for practical reasons at a track, that it would be best to keep methanol out of bucket racing.

[TZ350]

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A link to everything you wanted to know about the Aprilia RSA 125 engine. Words with Pictures:- https://forums.kartpulse.com/t/peak-...-rsa125/9958/3

[Flettner]

My design package, plus some wood from the wood shed. Best bit is when it's complete, its cast into a usable alloy component. At minimal cost.