23-10-2020, 09:39 AM
Hello all,
I have a 1924 based Boulogne replica, currently running on standard engine internals. I'd like to run a more robust engine as I'm currently constantly worrying it'll do something terminal when being used in anger and write off the entire engine.
My intention is to keep the current engine as a good spare and to build up a 'new' engine from scratch. I'm not looking for a full blown race engine, but more something along the lines of a fast road specification, and externally at least I'd like to keep the engine looking correct for its year. I already have all the 'bolt-on' bits fitted (Carb, inlet/exhaust manifold, wedge head).
I have an early crankcase spare, albeit with some damage as per the pictures below, so my first question is views on how viable it would be to repair this crankcase?
The next key question is whether or not it is possible to fit a larger/later crank to an early crankcase (I have a splash fed phoenix in mind)? Would this require further machining to the crankcase?
I'm also unsure about options for the block. I have a couple of spares kicking around, but they have the usual central stud cracking issue.
Are there any views on block sleeving, and does this exacerbate the central stud issue by reducing the surrounding material?
Realistically I'll be looking to have at least the bottom end put together by someone who knows what they're doing, so any recommendations for engine builders welcome.
Apologies I know there's a lot of questions in there and some are probably quite basic!
I have a 1924 based Boulogne replica, currently running on standard engine internals. I'd like to run a more robust engine as I'm currently constantly worrying it'll do something terminal when being used in anger and write off the entire engine.
My intention is to keep the current engine as a good spare and to build up a 'new' engine from scratch. I'm not looking for a full blown race engine, but more something along the lines of a fast road specification, and externally at least I'd like to keep the engine looking correct for its year. I already have all the 'bolt-on' bits fitted (Carb, inlet/exhaust manifold, wedge head).
I have an early crankcase spare, albeit with some damage as per the pictures below, so my first question is views on how viable it would be to repair this crankcase?
The next key question is whether or not it is possible to fit a larger/later crank to an early crankcase (I have a splash fed phoenix in mind)? Would this require further machining to the crankcase?
I'm also unsure about options for the block. I have a couple of spares kicking around, but they have the usual central stud cracking issue.
Are there any views on block sleeving, and does this exacerbate the central stud issue by reducing the surrounding material?
Realistically I'll be looking to have at least the bottom end put together by someone who knows what they're doing, so any recommendations for engine builders welcome.
Apologies I know there's a lot of questions in there and some are probably quite basic!