Don't bother bumping the compression if you are planning on filling your
healey up at the local gas pump. Even standard healey pistons keep the
compression too high for super unleaded anywhere in the US. You'll get
pinging and running on.
If anything, you should consider lowering the compression. There are much
better ways of increasing horsepower without sacrificing your ability to
pump gas from your local gas station (i.e. hotter cam, lightened flywheel,
2" carbs, ported head & manifold, etc etc).
Remember, build your engine around 92 octane (or 88 oct. for that matter).
Don't increase your compression unless you are using the car on the track
exclusively. Trust me on this one!
'53 BN1 '64 BJ8
On 10/24/05, Allyn Richardson <firstname.lastname@example.org> wrote:
> I've started to tear down my 26D six cylinder motor. Does anyone have some
> insight on whether the large crankshaft nut/bolt holding the pulley to the
> crank is a left or right hand thread? The manual isn't clear on this. Also
> is there a source for higher compression pistons for this motor. The
> has the stock flat top pistons now and I would like to bump the
> slightly when I rebuild it. I've been scraping the crud off the block for
> the last few days. Once it's gone it will probably take 50 lbs. off the
> weight of the engine.