Anyone dynoed an old spec Pobjoy steroid motor?

Yes I'm talking about a Stan Pobjoy 1916.

If you have one and you are reading this post:

Have you had it on a Dynodynamics dyno in shootout mode?

If so how much horsepower did it make?

I'm really interested in finding out how far I can push my engine which is of similar specification.

I think I can squeese out another 3 hp to get 90 out of it but that's it without changing heads.

Alternatively does anyone have a quarter mile time for this engine in a full weight street car with a regular pulley?

Thanks in advance. CT

140 with 2 belts on and one of the heads were cracked! :vader

whats the shootout mode mean with regards to the dyno?

Whats the cost for one of these motors ?

Ta Dan🙂🙂

blue74l wrote:140 with 2 belts on and one of the heads were cracked! :vader

ha ha ,
that was in standard trim before the 30hp dyno tune !!

must be all in the machining

Hmmmm. Well I guess that's a no.

I highly recommend it. Tuning is the cheapes horsepower you can buy.

Something to think about - A/f ratios at the exhaust outlet, or collector is an average of all the cylinders.

If you want to get it spot on, find a hill on a free afternoon, read the plugs at various RPM runs, and tune each cylinder, I would guarantee that you dont end up with the same jets in each throat.

Take it some one who has the correct gear and know how, obviously not the builder.:P:P:P:P:P