fuel / tyre

[minijim]

Can we use Demon Tweeks 114 RON race fuel with the transfer pump they sell? Also can we use a tyre softener ?

[Craig Powers]

re: Fuel see Blue Book, Section S

10.5.1. For Road-Going Series Production, Road-Going, Specialist Production, Modified Series Production, Modified Specialist Production and Hill Climb Super Sports Cars, pump fuel is mandatory. Only air may be mixed with the fuel as an oxidant.

10.5.2. Sports Libre and Racing Cars. Only pump fuel or methanol may be used. When using methanol, the addition of 10% by volume of Propanone is allowable (Note J.5.13.6).

[minijim]

Silverstone sell a race fuel from a pump that anyone can buy that I think is over 100 Ron

[SteveSlowboy]

In the definitions section of the Blue Book, it lists the BS standard that "Pump fuel" has to comply with.

Basically, no more than 100 RON.
Tyre softeners are not allowed.

Steve

[Radical]

5.9.5. Unless permitted under sporting regulations the
use of chemical tyre softeners is not permitted.

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’.
(b) LPG (Liquefied Petroleum Gas) which is of 99%
wt. min. hydrocarbon composition and that is
entirely gaseous at atmospheric temperature and
pressure. Complying with BS ENS89.
(c) Diesel Automotive Gas Oil (DERV) on general sale
to the public at roadside filling stations in the UK,
complying with BS EN 590 and EU Directive 98/70
EC (see Appendix 1).
(d) Bio Ethanol – Only permitted to be used with the
specific approval of the MSA. Specifications
available from the MSA Technical Department.
(e) Bio Diesel – Only permitted to be used with the
specific approval of the MSA. Specifications
available from the MSA Technical Department.

[minijim]

Your right about the tyres. 10.5.1 says pump fuel & B Nomenclature & Definitions gives you the spec of pump fuel 100RON this is the same as some race fuels.

[volvorsport]

100 ron is also expensive from specialist suppliers .......

shel is the best stuff - weve had this discussion before on here about making your own. how can they tell ?

[SteveSlowboy]

If your compression ration allows it, the Shell Optimax / V-power or whatever they call it these days is reckoned to be pretty consistent and reliable (so long as you;re getting it froma busy petrol station).

There are a few manufacturers who sell a 100 octane race fuel which meets the BS standard - and hence is MSA approved.

[Wrxbart]

Sunoco do a fuel msa approved think it's called MR100?

[windy]

I wish the MSA would adopt the FIA ruling. This subject has been done to death on the rally forum.

What about E85?