Fuel quality

[Myd]

A little OT but is there an equation for calculating the end fuel octane when you mix say 'V' power with a 105 race fuel and does that specify the quantities involved?

[Count Johnny]

Myd said:

A little OT but is there an equation for calculating the end fuel octane when you mix say 'V' power with a 105 race fuel and does that specify the quantities involved?

Blimey! I thought I was bad.

[Simon T]

Watch out for the regs if you are using it for racing, MSA spec for "pump fuel" is 99 octane max.

S

[LCM]

Simon T said:

Watch out for the regs if you are using it for racing, MSA spec for "pump fuel" is 99 octane max.

S

That's strange!

My Little Grey Book of Mysteries (page 64) says 100.0 RON.

Wouldn't want to discourage a Welshamn over 1.0 RON...........................

[Simon T]

Could be, what's an octane between scrutineers?

S

[Myd]

Came across this in my quest of what you get when you mix ASDA's finest with V Power :-) not sure how accurate the calculator is but it's sure to bring out the mad scientist in some....

http://www.motorsportsracingfuels.com/OctaneCalcul...

[sam919]

Simon T said:

Watch out for the regs if you are using it for racing, MSA spec for "pump fuel" is 99 octane max.

S

I thought it was done on oxygen content? 2.5% or a figure similar being the definition of 'pump fuel'

[SportsLibre]

Pump Fuel
(a) Petrol: Motor Gasoline of the type on sale to the
general public from UK roadside filling stations
(see Appendix 1):
BS4040 (leaded) subject to possession of a valid
permit for use, LRG (unleaded) in lieu of a BS or
EN standard (TBA), BS EN 228 (unleaded) and
BS7800 (super-unleaded).
Petrol is a product refined from crude oil that
contains a large number of identifiable
compounds that can typically be 250 in number.
These compounds can be identified and
compared to the available petrol from major oil
companies and suppliers.
Unless otherwise stated or the distinction is made
between leaded and unleaded petrol, the motor
gasoline fuel shall meet the following: Acceptance
levels for Octane Numbers will be accepted or
neglected according to the Standard ASTM
D.3244. Only additives to this Motor Gasoline Fuel
solely for the purpose of lead replacement are
allowed. Lead Replacement Gasoline (LRG, also
known as LRP): Lead replacement gasoline (LRG
also known as LRP): Only additives to unleaded
motor gasoline, solely for the purpose of lead
replacement, from Sodium, Phosphorous or
Manganese are allowed, subject to application
according to manufacturer’s instructions and to
the treated fuel complying with (B) Appendix 1.
Lead in excess of EU Directive 98/70 EC
requirements is illegal. This also applies to ‘Free
Fuel’.

[Simon T]

http://www.msauk.org/uploadedfiles/regulations/Exe...

I stand corrected, 100 RON

S