Re: Compression ratio advise

A couple of im****tant points are cylinder head material (cast iron or
aluminum) and camshaft timing events.

Julian wrote:
> 
> I'm starting to plan rebuilding my 440 to 500cid, and I'm trying to get
a
> feel for the best compression ratio to use. I'm aiming for around 500
> bhp/torque and the vehicle must run well of regular pump gas.
> 
> I'm in the UK and it appears that regular fuel is 95RON and super is
98RON.
> (minimum)
> 
> From the 500cid stroker table at:
http://www.440source.com/strokerkits.htm
> with 84cc heads (Edelbrock or 440's own new Stealth head) and 88cc heads
> (Edelbrock) with bores +30 thou I can have 10.85 or 10.48 (flat top.) Or
> 9.28 or 9.01 (dish)
> 
> I quite fancy working with 84cc heads because it keeps my options open
if
> and when 440source start to sell their own heads. So do you think 10.85
is
> OK with 95 or 98 octane or is it too much? I don't want to end up
running
> retarded ignition to stop pinking (and kill the power:-( )
> 
> What do you all use for street spec?
> 
> Thanks Julian.