Right so took me a while to realise that all i managed on sunday was to get a spare PY lump out of my parents shed and onto an engine stand in the workshop. A BBQ was mentioned and that put a halt to everything! :lol:
Jims pile of refurbed parts for his Mk1 Rocco were getting endangered by my works! As if we have sofa's up our unit that get used for this! :roll:
The mood was definately not buzzing, Jim hobbited away at re-assembly of his beam.
Baker got pested up on the blower..
And these bag men pretty much halted all play. Tom looking especially batty in this photo!
Onto monday. Got the PY block i'd bought as spare stripped. Noticed the exhaust valves had all smashed the pistons. (Timing out?). Also looks like the crank is a bit gnawsed up where the pulley fits onto the notched out "keyway". To top it the big end shells were fucked and "baggy" and looks like cylinder one has got serious corrosion around the headgasket sealing ring landing in the water way. No-wonder the block was for sale!
Anyhow, while i had it in bits thought i'd try out some theory.
Fitted the 1043cc crank and a PY piston and rod. I'd measured the rods and they both measured circa 122mm c-c. However the pistons on the 1043cc were taller by a good 10mm from the centre of the gudgeon pin.
So as expected.. no compression here Dave..
So Decided to have a look at a standard 1272cc piston. Pulled one out of a 2G block i'd previously butchered thinking it was a 1043cc. Trialled this in the block.
Hmm.. still not ideal. Didn't have a dial guage, but tbh didn't really need one to measure this. So had a peek with the verniers. For example the PY piston and rod at TDC in a PY block sits somewhere near to 2mm from the Deck. The PY piston and rod on a 1043cc crank in a PY block sat around 9mm from the deck iirc and the 2G something like 7mm.
So me and baker sat there doing some loud thinking.
Conclusion was that in order to get anything to work we'd either have to cut around 5mm off the deck (and bolts) or double stack gaskets/head spacer with the 1043cc HZ piston on a PY rod on an HZ crank in a PY block... did you get that? :lol:
.. Or machine some HZ pistons down. None of which were a satisfactory solution. Especially as i didn't actually want to be spending money on it.
So I began muttering defeat in the form of 1272cc..
To which I was shot down in flames by Baker saying there's no point in putting a 1272cc lump in Alison with a G-lader. As that's what was (almost (1306cc)) in the shiny red one. To which I agreed he was right and it went against the whole principal of this build (vaguely sensible).
Soo..
What to do?
Baker finally said, well you can put a 1272cc in if you turbo it! Otherwise there's no point. To which I agreed. But where can we find a turbo?
So "the team" went out on a scout round the yard. And who should find a turbo? Baker of course..
A fucking great thing!
So a bit of pilfering later and we had ourselves a turbo..
My partner in crime.. Martyn helped with the removal. I have honestly never seen such a shite set-up in all my life. The inlet and exhaust on this fecker were just designed to stay on the engine. Makes a crossflow polo engine a delight to work on in comparison even when fitted with a G-Lader!
So all we have to do now is make this thing work on a peeny little engine! :lol:
Melted pistons anyone?