[Healeys] +Compression ratio

[Keith Taylor]

Thanks Bob & Rick  I believe the pistons were from a Dodge "Q" & are not
dished, they are level with the top of the block
They were fitted long before I bought the car & after rebuild I had to fit
a high torque starter to get it to turnover
>From your assessments & my assumptions I thought compression would be
higher than 9.5 possibly 10+
The car certainly has plenty of torque  It also had an ugly/bizarre
plumbing setup to the head similar to a 100S for cooling

Curiosity satisfied

Keith

On 16 January 2016 at 12:57, Wilko2 <e-wilkins at cox.net> wrote:

> The standard 7.5/1 piston has a dish top with a volume of 29 cc.
>
> The LeMans 8.5/1 piston also has a dish top but the dish is not as deep
> being only 14cc volume. A true flat top if it has the same compression
> height (distance from the top of the pin hole to top of piston) would give
> a ratio of 10.5/1. There could be design variations that are flat top but
> have a lower compression height which would give a lower ratio.
>
> Without knowing where the top of your piston is in relation to the top of
> the cylinder or dimension from pin, there's not way of knowing without
> measuring your chambers.
>
> Rick Wilkins
>
> On Jan 15, 2016, at 5:10 PM, Keith Taylor wrote:
>
> > What would be  the compression ratio of a BN2 fitted with flat top
> pistons.
> >
> > Keith Taylor
> > BN1
> > BN2
> >
> > Southern Highlands OZ
> > _______________________________________________
> > Support Team.Net http://www.team.net/donate.html
> > Suggested annual donation  $12.75
> > Archive: http://www.team.net/archive
> > Forums: http://www.team.net/forums
> >
> > Healeys at autox.team.net
> > http://autox.team.net/mailman/listinfo/healeys
> >
> > Unsubscribe/Manage:
> http://autox.team.net/mailman/options/healeys/e-wilkins@cox.net
> >
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://autox.team.net/pipermail/healeys/attachments/20160116/b3dfe570/attachment.html>