Re: [Healeys] Horsepower and Torque numbers - update

[Bob Spidell <bspidell@comcast.net>]

I'm assuming that is 'research' method?  The equivalent in the US--which uses 
(R+M)/2 method--would be 91 octane 
(there's about an 8-pt spread around 90-95 octane).  That's consistent with our 
pump gas, which is usually 87-, 89- or 
91-octane (except in high altitude areas, where you sometimes can't get over 
89-octane).

The higher overlap cam probably offsets the higher compression ratio.  Good 
call.

Bob



On 3/19/2013 8:21 AM, Derek Job wrote:
> As high as you can get!
> In the UK that means using Shell V Power. It's rated at 99 octane. BP and a 
> few others have 97 octane but it is quite 
> common to roll into a petrol station now and find they only sell the basic 
> grade of petrol which is  95 octane.
> I can also use an additive for competition. Gets a bit expensive though.
> Derek
>
>
>
>     What octane gas is required?
>
>     Bob
>
>
>


-- 
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Bob Spidell           San Jose, CA            bspidell@comcast.net

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