Compression Ratio Vs Heat - NOW WITH OCTANE RATINGS!!!! (sorry)

[sjw06@uow.edu.au (Simmo)]

Thanks all for the help so far,

I should of thought of including this info earlyer,

I am from NSW, Australia.  I am not sure of the octane rating of the petrol
down here but I beleve it is about 92 for Unleaded and 96 for Leaded.
There is also the Premium Unleaded which I have no idea about.

I would like to run my car on the unleaded (trying to be reasonably
environmentally friendly!!)  but what ever the car would
prefer is what I will feed it.

Any further Sugestions or corrections on Aus fuel??



> I Am just building an 1835 for my 67 Notch an am up to setting the deck
> height using shims so as to obtain a compression ratio that wont blow my 
> heads off but will give me plenty of power.
> 
> Standard 1600 engines had a ratio of 7.5 : 1 and the 1500s had 8.5 : 1 as
> far as I know.
> 
> I am thinking of going for around 8.0 : 1 for mine.  It will be a daily
> driver so I want it to run cool but, ofcourse, I want as much power I can
> get out of it as I can.
> 
> Its an 1835 pancake with twin solex carbs, 009 dizzy, ap2 cam - quite mild
> only a lift of about .400" around the same as an Engle 90 if they were to
> have ever made one!
> 
> What compression ratios are ppl here running?  and what sort of heat do they
> run?  Can anyone suggest a better ratio to run?
> 
> Thanks
> Dak on,
> Simmo
> 
> 
>