[Healeys] High Octane Gas

[Austin Healey]

Ulta-high octain fuel will - normaly - not damage Your engine. On the other
hand without serious engine-work You wont see any benefit of it. You only
need as high octain as necessery to keep away from pinking (preignition due
to mixture self igniting).
Some risk is still there as You dont know how they achieved the high octain
rating. The additive used may not be compatible with the rubbers in the
system.
You can add a bit os extra advance for the spark timing, but it is not
likely that You will see any power up from this.

Gergo

2012/7/28 john spaur <jmsdarch at sbcglobal.net>

> Chris,
>
> I check my owner's handbook and shop manual and could not find a
> recommended octane rating; at least for a MKII BT7.
>
> John
>
>
> At 04:06 AM 7/29/2012 +1000, Chris Dimmock wrote:
>
>> Fred, I just love these threads!!
>>
>> Secondly, before I read another comment, can the poster pull out their
>> Owners
>> Handbook, and state what octane YOUR Healey required when it was brand
>> new,
>> unmodified, and a standard compression ratio from the factory?!?! Then
>> answer
>> the question!
>>
>> Rant over. RTFM.
>> ;-)
>> Best
>> Chris
>>
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