UK 99 RON Octane = US octane?

[boyzee81]

after some research i read- when converting US IRO to UK RON 90=95 and 94=98??

 

98 has been available in the UK for years now and SHELL has just brought out their 99 RON octane.

 

my shee is stock motor with just toomey T6 pipes and KN filter and is jetted just right for sea level and temp (although i read octane does not affect jetting right??)

 

is this too higher octane for a stock motor?

 

I'm looking into getting a NOSS or CHARIOT head for more comp/bottom end/rebuildability and bling factor- when i get my crank welded and don't know which cc domes to get as they are chosen through US ROI fuel ratings

 

I currently run the 98 with Putoline MX7 premix which are the best pum fuel available in the UK

 

Anyone have any knowledge with this?- want as lower cc as poss and being in the UK get parts from US so have to be very specific with my purchases cheers

[Glenyboy]

Tesco's ultimate is either 99 or 100 Ron

[Pasi S.]

Shell V-Power 99+(ron) is 93.4 PON. I have asked this from Shell. Our regular 98 (ron) is minimum 93.2 PON. This is from Neste-Oil.

I live in Finland.

 

Some 2-stroke sled racers told me not to use Shell V-power in my Banshee, because the special shit they put in it will make some build ups on top of the pistons and exhaust.

 

I have 20cc domes with 198/75% exhaust in my ss/sc motor and it works good. My other friend has un-ported ss/sc motor with T5´s and he has also 20cc domes.

Works really good with our 98.

 

Hope this helps.