Chris,
With the exception of very late SV heads, the castings
on 1592 and 1725s are the same.
There were various valve sizes used, for which I
would recommend using the headwith the biggest valves.
This would always be the 1725.
As to your engine, if the builder is not savvy in rootes engines,
you might consider pulling the sump and oil pump to verify
what exactly is in there.
Here why...
Early cam shafts have a different number of pump drive gear teeth.
You can take a 3 main cam and 3 main pump,
or a 5 main cam and a 5 main pump, or the appropriate pump drive gear
for the cam that is installed in your engine.
You have to count the teeth on each.
I have heard of more than one case where botgh gears are damaged
by this exact situation.
BTW even with the difference in teeth, the engine will still turn,
as will the distrubutor (at 12/13 speed if memory serves).
Jarrid Gross
Chris Stephenson wrote:
> Ok group,
>
> It has been a while since I have worked on (or driven) any of my Sunbeams.
> But now, I have contracted to purchase the Series III shell from Tiger Auto
> and I need some advice.
>
> I have a 1592 engine that was professionally build. My intent was to use
> that engine in my Series III GT rally car - the one I was building to run
> the La Carrera Pan America. Well those plans are shelved indefinitely. Now,
> I want to use that engine in the Series III I just purchased. My dilemma is
> that I took a bunch of parts to the engine builder (at his request both 1592
> and 1725) and he used the 1725 head on the 1592 block. I do not know which
> cam he used. I also do not know which oil pump he used - I think he sourced
> a new 1725 one. I know I can drop the sump to check on the oil pump, but how
> can I tell if everything will work in unison? This engine was completed
> several years ago, so I doubt the builder will remember. Also, we had a
> little falling-out because he was not doing the quality of work I expected
> on the body. So, I have this engine which is built for endurance - if
> everything was put together right. Any advice?
>
> Chris Stephenson
> cs@tscg.net
> (404) 915-7669
>
> Series III - Rust Bucket
> Series III GT
> Series III - Under Contract
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